~ruther/qmk_firmware

66015f164507022e376a15b45f41b58c0fb5ee97 — Ryan 1 year, 3 months ago a5ea619
LED drivers: create structs to hold PWM/scaling buffers (#22955)

M drivers/led/aw20216s.c => drivers/led/aw20216s.c +17 -10
@@ 45,8 45,15 @@
#    define AW20216S_SPI_DIVISOR 4
#endif

uint8_t g_pwm_buffer[AW20216S_DRIVER_COUNT][AW20216S_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[AW20216S_DRIVER_COUNT] = {false};
typedef struct aw20216s_driver_t {
    uint8_t pwm_buffer[AW20216S_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
} PACKED aw20216s_driver_t;

aw20216s_driver_t driver_buffers[AW20216S_DRIVER_COUNT] = {{
    .pwm_buffer       = {0},
    .pwm_buffer_dirty = false,
}};

bool aw20216s_write(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t* data, uint8_t len) {
    static uint8_t s_spi_transfer_buffer[2] = {0};


@@ 131,14 138,14 @@ void aw20216s_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    aw20216s_led_t led;
    memcpy_P(&led, (&g_aw20216s_leds[index]), sizeof(led));

    if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
    if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
        return;
    }

    g_pwm_buffer[led.driver][led.r]          = red;
    g_pwm_buffer[led.driver][led.g]          = green;
    g_pwm_buffer[led.driver][led.b]          = blue;
    g_pwm_buffer_update_required[led.driver] = true;
    driver_buffers[led.driver].pwm_buffer[led.r] = red;
    driver_buffers[led.driver].pwm_buffer[led.g] = green;
    driver_buffers[led.driver].pwm_buffer[led.b] = blue;
    driver_buffers[led.driver].pwm_buffer_dirty  = true;
}

void aw20216s_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {


@@ 148,9 155,9 @@ void aw20216s_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
}

void aw20216s_update_pwm_buffers(pin_t cs_pin, uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
        aw20216s_write(cs_pin, AW20216S_PAGE_PWM, 0, g_pwm_buffer[index], AW20216S_PWM_REGISTER_COUNT);
        g_pwm_buffer_update_required[index] = false;
    if (driver_buffers[index].pwm_buffer_dirty) {
        aw20216s_write(cs_pin, AW20216S_PAGE_PWM, 0, driver_buffers[index].pwm_buffer, AW20216S_PWM_REGISTER_COUNT);
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3218-mono.c => drivers/led/issi/is31fl3218-mono.c +26 -18
@@ 28,12 28,20 @@
#    define IS31FL3218_I2C_PERSISTENCE 0
#endif

// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
uint8_t g_pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required = false;
typedef struct is31fl3218_driver_t {
    uint8_t pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3218_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3218_driver_t;

uint8_t g_led_control_registers[IS31FL3218_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required                        = false;
// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
is31fl3218_driver_t driver_buffers = {
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
};

void is31fl3218_write_register(uint8_t reg, uint8_t data) {
#if IS31FL3218_I2C_PERSISTENCE > 0


@@ 48,10 56,10 @@ void is31fl3218_write_register(uint8_t reg, uint8_t data) {
void is31fl3218_write_pwm_buffer(void) {
#if IS31FL3218_I2C_PERSISTENCE > 0
    for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
        if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, g_pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
    }
#else
    i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, g_pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT);
    i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT);
#endif
}



@@ 90,12 98,12 @@ void is31fl3218_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3218_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.v] == value) {
        if (driver_buffers.pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.v]          = value;
        g_pwm_buffer_update_required = true;
        driver_buffers.pwm_buffer[led.v] = value;
        driver_buffers.pwm_buffer_dirty  = true;
    }
}



@@ 113,30 121,30 @@ void is31fl3218_set_led_control_register(uint8_t index, bool value) {
    uint8_t bit_value        = led.v % 6;

    if (value) {
        g_led_control_registers[control_register] |= (1 << bit_value);
        driver_buffers.led_control_buffer[control_register] |= (1 << bit_value);
    } else {
        g_led_control_registers[control_register] &= ~(1 << bit_value);
        driver_buffers.led_control_buffer[control_register] &= ~(1 << bit_value);
    }

    g_led_control_registers_update_required = true;
    driver_buffers.led_control_buffer_dirty = true;
}

void is31fl3218_update_pwm_buffers(void) {
    if (g_pwm_buffer_update_required) {
    if (driver_buffers.pwm_buffer_dirty) {
        is31fl3218_write_pwm_buffer();
        // Load PWM registers and LED Control register data
        is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);

        g_pwm_buffer_update_required = false;
        driver_buffers.pwm_buffer_dirty = false;
    }
}

void is31fl3218_update_led_control_registers(void) {
    if (g_led_control_registers_update_required) {
    if (driver_buffers.led_control_buffer_dirty) {
        for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, g_led_control_registers[i]);
            is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, driver_buffers.led_control_buffer[i]);
        }

        g_led_control_registers_update_required = false;
        driver_buffers.led_control_buffer_dirty = false;
    }
}

M drivers/led/issi/is31fl3218.c => drivers/led/issi/is31fl3218.c +32 -24
@@ 28,12 28,20 @@
#    define IS31FL3218_I2C_PERSISTENCE 0
#endif

// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
uint8_t g_pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required = false;
typedef struct is31fl3218_driver_t {
    uint8_t pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3218_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3218_driver_t;

uint8_t g_led_control_registers[IS31FL3218_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required                        = false;
// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
is31fl3218_driver_t driver_buffers = {
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
};

void is31fl3218_write_register(uint8_t reg, uint8_t data) {
#if IS31FL3218_I2C_PERSISTENCE > 0


@@ 48,10 56,10 @@ void is31fl3218_write_register(uint8_t reg, uint8_t data) {
void is31fl3218_write_pwm_buffer(void) {
#if IS31FL3218_I2C_PERSISTENCE > 0
    for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
        if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, g_pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
    }
#else
    i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, g_pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT);
    i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT);
#endif
}



@@ 90,14 98,14 @@ void is31fl3218_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3218_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.r] == red && g_pwm_buffer[led.g] == green && g_pwm_buffer[led.b] == blue) {
        if (driver_buffers.pwm_buffer[led.r] == red && driver_buffers.pwm_buffer[led.g] == green && driver_buffers.pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.r]          = red;
        g_pwm_buffer[led.g]          = green;
        g_pwm_buffer[led.b]          = blue;
        g_pwm_buffer_update_required = true;
        driver_buffers.pwm_buffer[led.r] = red;
        driver_buffers.pwm_buffer[led.g] = green;
        driver_buffers.pwm_buffer[led.b] = blue;
        driver_buffers.pwm_buffer_dirty  = true;
    }
}



@@ 119,40 127,40 @@ void is31fl3218_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b              = led.b % 6;

    if (red) {
        g_led_control_registers[control_register_r] |= (1 << bit_r);
        driver_buffers.led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[control_register_r] &= ~(1 << bit_r);
        driver_buffers.led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[control_register_g] |= (1 << bit_g);
        driver_buffers.led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[control_register_g] &= ~(1 << bit_g);
        driver_buffers.led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[control_register_b] |= (1 << bit_b);
        driver_buffers.led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[control_register_b] &= ~(1 << bit_b);
        driver_buffers.led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required = true;
    driver_buffers.led_control_buffer_dirty = true;
}

void is31fl3218_update_pwm_buffers(void) {
    if (g_pwm_buffer_update_required) {
    if (driver_buffers.pwm_buffer_dirty) {
        is31fl3218_write_pwm_buffer();
        // Load PWM registers and LED Control register data
        is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);

        g_pwm_buffer_update_required = false;
        driver_buffers.pwm_buffer_dirty = false;
    }
}

void is31fl3218_update_led_control_registers(void) {
    if (g_led_control_registers_update_required) {
    if (driver_buffers.led_control_buffer_dirty) {
        for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, g_led_control_registers[i]);
            is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, driver_buffers.led_control_buffer[i]);
        }

        g_led_control_registers_update_required = false;
        driver_buffers.led_control_buffer_dirty = false;
    }
}

M drivers/led/issi/is31fl3731-mono.c => drivers/led/issi/is31fl3731-mono.c +26 -18
@@ 50,11 50,19 @@ const uint8_t i2c_addresses[IS31FL3731_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3731_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3731_DRIVER_COUNT][IS31FL3731_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT]                        = {false};
typedef struct is31fl3731_driver_t {
    uint8_t pwm_buffer[IS31FL3731_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3731_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3731_driver_t;

is31fl3731_driver_t driver_buffers[IS31FL3731_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3731_I2C_PERSISTENCE > 0


@@ 78,10 86,10 @@ void is31fl3731_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3731_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3731_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3731_I2C_TIMEOUT);
#endif
    }
}


@@ 160,12 168,12 @@ void is31fl3731_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3731_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.driver][led.v]          = value;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 183,29 191,29 @@ void is31fl3731_set_led_control_register(uint8_t index, bool value) {
    uint8_t bit_value        = led.v % 8;

    if (value) {
        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] |= (1 << bit_value);
    } else {
        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] &= ~(1 << bit_value);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3731_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3731_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3731_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3731_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3731_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3731.c => drivers/led/issi/is31fl3731.c +32 -24
@@ 49,11 49,19 @@ const uint8_t i2c_addresses[IS31FL3731_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3731_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3731_DRIVER_COUNT][IS31FL3731_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT]                        = {false};
typedef struct is31fl3731_driver_t {
    uint8_t pwm_buffer[IS31FL3731_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3731_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3731_driver_t;

is31fl3731_driver_t driver_buffers[IS31FL3731_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3731_I2C_PERSISTENCE > 0


@@ 77,10 85,10 @@ void is31fl3731_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3731_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3731_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3731_I2C_TIMEOUT);
#endif
    }
}


@@ 159,14 167,14 @@ void is31fl3731_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3731_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 188,39 196,39 @@ void is31fl3731_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b              = led.b % 8;

    if (red) {
        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3731_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3731_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3731_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3731_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3731_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3733-mono.c => drivers/led/issi/is31fl3733-mono.c +26 -18
@@ 94,11 94,19 @@ const uint8_t driver_sync[IS31FL3733_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3733_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3733_DRIVER_COUNT][IS31FL3733_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
typedef struct is31fl3733_driver_t {
    uint8_t pwm_buffer[IS31FL3733_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3733_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3733_driver_t;

is31fl3733_driver_t driver_buffers[IS31FL3733_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3733_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3733_I2C_PERSISTENCE > 0


@@ 123,10 131,10 @@ void is31fl3733_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3733_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3733_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3733_I2C_TIMEOUT);
#endif
    }
}


@@ 191,12 199,12 @@ void is31fl3733_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3733_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.driver][led.v]          = value;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 214,33 222,33 @@ void is31fl3733_set_led_control_register(uint8_t index, bool value) {
    uint8_t bit_value        = led.v % 8;

    if (value) {
        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] |= (1 << bit_value);
    } else {
        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] &= ~(1 << bit_value);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3733_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3733_select_page(index, IS31FL3733_COMMAND_PWM);

        is31fl3733_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3733_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3733_select_page(index, IS31FL3733_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3733_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3733_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3733.c => drivers/led/issi/is31fl3733.c +32 -24
@@ 93,11 93,19 @@ const uint8_t driver_sync[IS31FL3733_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3733_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3733_DRIVER_COUNT][IS31FL3733_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
typedef struct is31fl3733_driver_t {
    uint8_t pwm_buffer[IS31FL3733_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3733_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3733_driver_t;

is31fl3733_driver_t driver_buffers[IS31FL3733_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3733_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3733_I2C_PERSISTENCE > 0


@@ 122,10 130,10 @@ void is31fl3733_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3733_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3733_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3733_I2C_TIMEOUT);
#endif
    }
}


@@ 190,14 198,14 @@ void is31fl3733_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3733_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 219,43 227,43 @@ void is31fl3733_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b              = led.b % 8;

    if (red) {
        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3733_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3733_select_page(index, IS31FL3733_COMMAND_PWM);

        is31fl3733_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3733_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3733_select_page(index, IS31FL3733_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3733_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3733_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3736-mono.c => drivers/led/issi/is31fl3736-mono.c +26 -18
@@ 65,11 65,19 @@ const uint8_t i2c_addresses[IS31FL3736_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT]                        = {false};
typedef struct is31fl3736_driver_t {
    uint8_t pwm_buffer[IS31FL3736_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3736_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3736_driver_t;

is31fl3736_driver_t driver_buffers[IS31FL3736_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3736_I2C_PERSISTENCE > 0


@@ 94,10 102,10 @@ void is31fl3736_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3736_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3736_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3736_I2C_TIMEOUT);
#endif
    }
}


@@ 160,12 168,12 @@ void is31fl3736_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3736_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.driver][led.v]          = value;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 189,33 197,33 @@ void is31fl3736_set_led_control_register(uint8_t index, bool value) {
    uint8_t bit_value        = led.v % 8;

    if (value) {
        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] |= (1 << bit_value);
    } else {
        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] &= ~(1 << bit_value);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3736_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM);

        is31fl3736_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3736_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3736_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3736_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3736.c => drivers/led/issi/is31fl3736.c +32 -24
@@ 65,11 65,19 @@ const uint8_t i2c_addresses[IS31FL3736_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT]                        = {false};
typedef struct is31fl3736_driver_t {
    uint8_t pwm_buffer[IS31FL3736_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3736_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3736_driver_t;

is31fl3736_driver_t driver_buffers[IS31FL3736_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3736_I2C_PERSISTENCE > 0


@@ 94,10 102,10 @@ void is31fl3736_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3736_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3736_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3736_I2C_TIMEOUT);
#endif
    }
}


@@ 160,14 168,14 @@ void is31fl3736_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3736_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 196,43 204,43 @@ void is31fl3736_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b = led.b % 8;

    if (red) {
        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3736_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM);

        is31fl3736_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3736_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3736_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3736_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3737-mono.c => drivers/led/issi/is31fl3737-mono.c +26 -19
@@ 67,12 67,19 @@ const uint8_t i2c_addresses[IS31FL3737_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3737_write_pwm_buffer() but it's
// probably not worth the extra complexity.

uint8_t g_pwm_buffer[IS31FL3737_DRIVER_COUNT][IS31FL3737_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT]                        = {false};
typedef struct is31fl3737_driver_t {
    uint8_t pwm_buffer[IS31FL3737_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3737_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3737_driver_t;

is31fl3737_driver_t driver_buffers[IS31FL3737_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3737_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3737_I2C_PERSISTENCE > 0


@@ 97,10 104,10 @@ void is31fl3737_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3737_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3737_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3737_I2C_TIMEOUT);
#endif
    }
}


@@ 163,12 170,12 @@ void is31fl3737_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3737_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3737_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.driver][led.v]          = value;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 186,33 193,33 @@ void is31fl3737_set_led_control_register(uint8_t index, bool value) {
    uint8_t bit_value        = led.v % 8;

    if (value) {
        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] |= (1 << bit_value);
    } else {
        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] &= ~(1 << bit_value);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3737_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3737_select_page(index, IS31FL3737_COMMAND_PWM);

        is31fl3737_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3737_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3737_select_page(index, IS31FL3737_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3737_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3737_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3737.c => drivers/led/issi/is31fl3737.c +32 -25
@@ 67,12 67,19 @@ const uint8_t i2c_addresses[IS31FL3737_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3737_write_pwm_buffer() but it's
// probably not worth the extra complexity.

uint8_t g_pwm_buffer[IS31FL3737_DRIVER_COUNT][IS31FL3737_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT]                        = {false};
typedef struct is31fl3737_driver_t {
    uint8_t pwm_buffer[IS31FL3737_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3737_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3737_driver_t;

is31fl3737_driver_t driver_buffers[IS31FL3737_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3737_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3737_I2C_PERSISTENCE > 0


@@ 97,10 104,10 @@ void is31fl3737_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3737_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3737_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3737_I2C_TIMEOUT);
#endif
    }
}


@@ 163,14 170,14 @@ void is31fl3737_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3737_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3737_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 192,43 199,43 @@ void is31fl3737_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b              = led.b % 8;

    if (red) {
        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3737_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3737_select_page(index, IS31FL3737_COMMAND_PWM);

        is31fl3737_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3737_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3737_select_page(index, IS31FL3737_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3737_write_register(index, i, g_led_control_registers[index][i]);
            is31fl3737_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3741-mono.c => drivers/led/issi/is31fl3741-mono.c +33 -25
@@ 71,11 71,19 @@ const uint8_t i2c_addresses[IS31FL3741_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3741_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3741_DRIVER_COUNT][IS31FL3741_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3741_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_SCALING_REGISTER_COUNT];
typedef struct is31fl3741_driver_t {
    uint8_t pwm_buffer[IS31FL3741_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3741_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3741_driver_t;

is31fl3741_driver_t driver_buffers[IS31FL3741_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3741_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3741_I2C_PERSISTENCE > 0


@@ 102,20 110,20 @@ void is31fl3741_write_pwm_buffer(uint8_t index) {

#if IS31FL3741_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3741_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i % 180, driver_buffers[index].pwm_buffer + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i % 180, driver_buffers[index].pwm_buffer + i, 18, IS31FL3741_I2C_TIMEOUT);
#endif
    }

    // transfer the left cause the total number is 351
#if IS31FL3741_I2C_PERSISTENCE > 0
    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
        if (i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        if (i2c_write_register(i2c_addresses[index] << 1, 162, driver_buffers[index].pwm_buffer + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
    }
#else
    i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT);
    i2c_write_register(i2c_addresses[index] << 1, 162, driver_buffers[index].pwm_buffer + 342, 9, IS31FL3741_I2C_TIMEOUT);
#endif
}



@@ 166,12 174,12 @@ void is31fl3741_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3741_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.v]          = value;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 186,52 194,52 @@ void is31fl3741_set_led_control_register(uint8_t index, bool value) {
    memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));

    if (value) {
        g_scaling_registers[led.driver][led.v] = 0xFF;
        driver_buffers[led.driver].scaling_buffer[led.v] = 0xFF;
    } else {
        g_scaling_registers[led.driver][led.v] = 0x00;
        driver_buffers[led.driver].scaling_buffer[led.v] = 0x00;
    }

    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer_dirty = true;
}

void is31fl3741_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3741_select_page(index, IS31FL3741_COMMAND_PWM_0);

        is31fl3741_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t value) {
    g_pwm_buffer[pled->driver][pled->v]        = value;
    g_pwm_buffer_update_required[pled->driver] = true;
    driver_buffers[pled->driver].pwm_buffer[pled->v] = value;
    driver_buffers[pled->driver].pwm_buffer_dirty    = true;
}

void is31fl3741_update_led_control_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_0);

        // CS1_SW1 to CS30_SW6 are on page 2
        for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
            is31fl3741_write_register(index, i, g_scaling_registers[index][i]);
            is31fl3741_write_register(index, i, driver_buffers[index].scaling_buffer[i]);
        }

        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_1);

        // CS1_SW7 to CS39_SW9 are on page 3
        for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
            is31fl3741_write_register(index, i - CS1_SW7, g_scaling_registers[index][i]);
            is31fl3741_write_register(index, i - CS1_SW7, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}

void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t value) {
    g_scaling_registers[pled->driver][pled->v]        = value;
    g_scaling_registers_update_required[pled->driver] = true;
    driver_buffers[pled->driver].scaling_buffer[pled->v] = value;
    driver_buffers[pled->driver].scaling_buffer_dirty    = true;
}

void is31fl3741_flush(void) {

M drivers/led/issi/is31fl3741.c => drivers/led/issi/is31fl3741.c +43 -35
@@ 71,11 71,19 @@ const uint8_t i2c_addresses[IS31FL3741_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3741_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3741_DRIVER_COUNT][IS31FL3741_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3741_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_SCALING_REGISTER_COUNT];
typedef struct is31fl3741_driver_t {
    uint8_t pwm_buffer[IS31FL3741_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3741_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3741_driver_t;

is31fl3741_driver_t driver_buffers[IS31FL3741_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3741_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3741_I2C_PERSISTENCE > 0


@@ 102,20 110,20 @@ void is31fl3741_write_pwm_buffer(uint8_t index) {

#if IS31FL3741_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3741_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i % 180, driver_buffers[index].pwm_buffer + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i % 180, driver_buffers[index].pwm_buffer + i, 18, IS31FL3741_I2C_TIMEOUT);
#endif
    }

    // transfer the left cause the total number is 351
#if IS31FL3741_I2C_PERSISTENCE > 0
    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
        if (i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        if (i2c_write_register(i2c_addresses[index] << 1, 162, driver_buffers[index].pwm_buffer + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
    }
#else
    i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT);
    i2c_write_register(i2c_addresses[index] << 1, 162, driver_buffers[index].pwm_buffer + 342, 9, IS31FL3741_I2C_TIMEOUT);
#endif
}



@@ 166,14 174,14 @@ void is31fl3741_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3741_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 188,68 196,68 @@ void is31fl3741_set_led_control_register(uint8_t index, bool red, bool green, bo
    memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));

    if (red) {
        g_scaling_registers[led.driver][led.r] = 0xFF;
        driver_buffers[led.driver].scaling_buffer[led.r] = 0xFF;
    } else {
        g_scaling_registers[led.driver][led.r] = 0x00;
        driver_buffers[led.driver].scaling_buffer[led.r] = 0x00;
    }

    if (green) {
        g_scaling_registers[led.driver][led.g] = 0xFF;
        driver_buffers[led.driver].scaling_buffer[led.g] = 0xFF;
    } else {
        g_scaling_registers[led.driver][led.g] = 0x00;
        driver_buffers[led.driver].scaling_buffer[led.g] = 0x00;
    }

    if (blue) {
        g_scaling_registers[led.driver][led.b] = 0xFF;
        driver_buffers[led.driver].scaling_buffer[led.b] = 0xFF;
    } else {
        g_scaling_registers[led.driver][led.b] = 0x00;
        driver_buffers[led.driver].scaling_buffer[led.b] = 0x00;
    }

    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer_dirty = true;
}

void is31fl3741_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3741_select_page(index, IS31FL3741_COMMAND_PWM_0);

        is31fl3741_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t red, uint8_t green, uint8_t blue) {
    g_pwm_buffer[pled->driver][pled->r]        = red;
    g_pwm_buffer[pled->driver][pled->g]        = green;
    g_pwm_buffer[pled->driver][pled->b]        = blue;
    g_pwm_buffer_update_required[pled->driver] = true;
    driver_buffers[pled->driver].pwm_buffer[pled->r] = red;
    driver_buffers[pled->driver].pwm_buffer[pled->g] = green;
    driver_buffers[pled->driver].pwm_buffer[pled->b] = blue;
    driver_buffers[pled->driver].pwm_buffer_dirty    = true;
}

void is31fl3741_update_led_control_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_0);

        // CS1_SW1 to CS30_SW6 are on page 2
        for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
            is31fl3741_write_register(index, i, g_scaling_registers[index][i]);
            is31fl3741_write_register(index, i, driver_buffers[index].scaling_buffer[i]);
        }

        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_1);

        // CS1_SW7 to CS39_SW9 are on page 3
        for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
            is31fl3741_write_register(index, i - CS1_SW7, g_scaling_registers[index][i]);
            is31fl3741_write_register(index, i - CS1_SW7, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}

void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t red, uint8_t green, uint8_t blue) {
    g_scaling_registers[pled->driver][pled->r]        = red;
    g_scaling_registers[pled->driver][pled->g]        = green;
    g_scaling_registers[pled->driver][pled->b]        = blue;
    g_scaling_registers_update_required[pled->driver] = true;
    driver_buffers[pled->driver].scaling_buffer[pled->r] = red;
    driver_buffers[pled->driver].scaling_buffer[pled->g] = green;
    driver_buffers[pled->driver].scaling_buffer[pled->b] = blue;
    driver_buffers[pled->driver].scaling_buffer_dirty    = true;
}

void is31fl3741_flush(void) {

M drivers/led/issi/is31fl3742a-mono.c => drivers/led/issi/is31fl3742a-mono.c +25 -17
@@ 66,11 66,19 @@ const uint8_t i2c_addresses[IS31FL3742A_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT];
typedef struct is31fl3742a_driver_t {
    uint8_t pwm_buffer[IS31FL3742A_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3742A_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3742a_driver_t;

is31fl3742a_driver_t driver_buffers[IS31FL3742A_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3742A_I2C_PERSISTENCE > 0


@@ 95,10 103,10 @@ void is31fl3742a_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 30) {
#if IS31FL3742A_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3742A_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 30, IS31FL3742A_I2C_TIMEOUT);
#endif
    }
}


@@ 155,12 163,12 @@ void is31fl3742a_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3742A_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.driver][led.v]          = value;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 174,29 182,29 @@ void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value) {
    is31fl3742a_led_t led;
    memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.v]          = value;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.v] = value;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3742a_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM);

        is31fl3742a_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3742a_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
            is31fl3742a_write_register(index, i, g_scaling_registers[index][i]);
            is31fl3742a_write_register(index, i, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3742a.c => drivers/led/issi/is31fl3742a.c +29 -21
@@ 66,11 66,19 @@ const uint8_t i2c_addresses[IS31FL3742A_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT];
typedef struct is31fl3742a_driver_t {
    uint8_t pwm_buffer[IS31FL3742A_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3742A_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3742a_driver_t;

is31fl3742a_driver_t driver_buffers[IS31FL3742A_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3742A_I2C_PERSISTENCE > 0


@@ 95,10 103,10 @@ void is31fl3742a_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 30) {
#if IS31FL3742A_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3742A_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 30, IS31FL3742A_I2C_TIMEOUT);
#endif
    }
}


@@ 155,14 163,14 @@ void is31fl3742a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) 
    if (index >= 0 && index < IS31FL3742A_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 176,31 184,31 @@ void is31fl3742a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
    is31fl3742a_led_t led;
    memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.r]          = red;
    g_scaling_registers[led.driver][led.g]          = green;
    g_scaling_registers[led.driver][led.b]          = blue;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.r] = red;
    driver_buffers[led.driver].scaling_buffer[led.g] = green;
    driver_buffers[led.driver].scaling_buffer[led.b] = blue;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3742a_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM);

        is31fl3742a_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3742a_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
            is31fl3742a_write_register(index, i, g_scaling_registers[index][i]);
            is31fl3742a_write_register(index, i, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3743a-mono.c => drivers/led/issi/is31fl3743a-mono.c +25 -17
@@ 88,11 88,19 @@ const uint8_t driver_sync[IS31FL3743A_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
typedef struct is31fl3743a_driver_t {
    uint8_t pwm_buffer[IS31FL3743A_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3743A_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3743a_driver_t;

is31fl3743a_driver_t driver_buffers[IS31FL3743A_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3743a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3743A_I2C_PERSISTENCE > 0


@@ 117,10 125,10 @@ void is31fl3743a_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3743A_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3743A_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3743A_I2C_TIMEOUT);
#endif
    }
}


@@ 179,12 187,12 @@ void is31fl3743a_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3743A_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.v]          = value;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 198,29 206,29 @@ void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value) {
    is31fl3743a_led_t led;
    memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.v]          = value;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.v] = value;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3743a_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_PWM);

        is31fl3743a_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3743a_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
            is31fl3743a_write_register(index, i + 1, g_scaling_registers[index][i]);
            is31fl3743a_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3743a.c => drivers/led/issi/is31fl3743a.c +29 -21
@@ 88,11 88,19 @@ const uint8_t driver_sync[IS31FL3743A_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
typedef struct is31fl3743a_driver_t {
    uint8_t pwm_buffer[IS31FL3743A_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3743A_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3743a_driver_t;

is31fl3743a_driver_t driver_buffers[IS31FL3743A_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3743a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3743A_I2C_PERSISTENCE > 0


@@ 117,10 125,10 @@ void is31fl3743a_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3743A_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3743A_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3743A_I2C_TIMEOUT);
#endif
    }
}


@@ 179,14 187,14 @@ void is31fl3743a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) 
    if (index >= 0 && index < IS31FL3743A_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 200,31 208,31 @@ void is31fl3743a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
    is31fl3743a_led_t led;
    memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.r]          = red;
    g_scaling_registers[led.driver][led.g]          = green;
    g_scaling_registers[led.driver][led.b]          = blue;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.r] = red;
    driver_buffers[led.driver].scaling_buffer[led.g] = green;
    driver_buffers[led.driver].scaling_buffer[led.b] = blue;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3743a_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_PWM);

        is31fl3743a_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3743a_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
            is31fl3743a_write_register(index, i + 1, g_scaling_registers[index][i]);
            is31fl3743a_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3745-mono.c => drivers/led/issi/is31fl3745-mono.c +25 -17
@@ 88,11 88,19 @@ const uint8_t driver_sync[IS31FL3745_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
typedef struct is31fl3745_driver_t {
    uint8_t pwm_buffer[IS31FL3745_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3745_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3745_driver_t;

is31fl3745_driver_t driver_buffers[IS31FL3745_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3745_I2C_PERSISTENCE > 0


@@ 117,10 125,10 @@ void is31fl3745_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3745_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3745_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3745_I2C_TIMEOUT);
#endif
    }
}


@@ 179,12 187,12 @@ void is31fl3745_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3745_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.v]          = value;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 198,29 206,29 @@ void is31fl3745_set_scaling_register(uint8_t index, uint8_t value) {
    is31fl3745_led_t led;
    memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.v]          = value;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.v] = value;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3745_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);

        is31fl3745_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3745_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
            is31fl3745_write_register(index, i + 1, g_scaling_registers[index][i]);
            is31fl3745_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3745.c => drivers/led/issi/is31fl3745.c +29 -21
@@ 88,11 88,19 @@ const uint8_t driver_sync[IS31FL3745_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
typedef struct is31fl3745_driver_t {
    uint8_t pwm_buffer[IS31FL3745_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3745_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3745_driver_t;

is31fl3745_driver_t driver_buffers[IS31FL3745_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3745_I2C_PERSISTENCE > 0


@@ 117,10 125,10 @@ void is31fl3745_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3745_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3745_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3745_I2C_TIMEOUT);
#endif
    }
}


@@ 179,14 187,14 @@ void is31fl3745_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3745_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 200,31 208,31 @@ void is31fl3745_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, 
    is31fl3745_led_t led;
    memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.r]          = red;
    g_scaling_registers[led.driver][led.g]          = green;
    g_scaling_registers[led.driver][led.b]          = blue;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.r] = red;
    driver_buffers[led.driver].scaling_buffer[led.g] = green;
    driver_buffers[led.driver].scaling_buffer[led.b] = blue;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3745_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);

        is31fl3745_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3745_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
            is31fl3745_write_register(index, i + 1, g_scaling_registers[index][i]);
            is31fl3745_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3746a-mono.c => drivers/led/issi/is31fl3746a-mono.c +25 -17
@@ 66,11 66,19 @@ const uint8_t i2c_addresses[IS31FL3746A_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3746A_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3746A_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_SCALING_REGISTER_COUNT];
typedef struct is31fl3746a_driver_t {
    uint8_t pwm_buffer[IS31FL3746A_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3746A_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3746a_driver_t;

is31fl3746a_driver_t driver_buffers[IS31FL3746A_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3746A_I2C_PERSISTENCE > 0


@@ 95,10 103,10 @@ void is31fl3746a_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3746A_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3746A_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT);
#endif
    }
}


@@ 156,12 164,12 @@ void is31fl3746a_set_value(int index, uint8_t value) {
    if (index >= 0 && index < IS31FL3746A_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.v]          = value;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 175,29 183,29 @@ void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value) {
    is31fl3746a_led_t led;
    memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.v]          = value;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.v] = value;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3746a_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);

        is31fl3746a_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3746a_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
            is31fl3746a_write_register(index, i + 1, g_scaling_registers[index][i]);
            is31fl3746a_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/issi/is31fl3746a.c => drivers/led/issi/is31fl3746a.c +29 -21
@@ 66,11 66,19 @@ const uint8_t i2c_addresses[IS31FL3746A_DRIVER_COUNT] = {
#endif
};

uint8_t g_pwm_buffer[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3746A_DRIVER_COUNT]        = {false};
bool    g_scaling_registers_update_required[IS31FL3746A_DRIVER_COUNT] = {false};

uint8_t g_scaling_registers[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_SCALING_REGISTER_COUNT];
typedef struct is31fl3746a_driver_t {
    uint8_t pwm_buffer[IS31FL3746A_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t scaling_buffer[IS31FL3746A_SCALING_REGISTER_COUNT];
    bool    scaling_buffer_dirty;
} PACKED is31fl3746a_driver_t;

is31fl3746a_driver_t driver_buffers[IS31FL3746A_DRIVER_COUNT] = {{
    .pwm_buffer           = {0},
    .pwm_buffer_dirty     = false,
    .scaling_buffer       = {0},
    .scaling_buffer_dirty = false,
}};

void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3746A_I2C_PERSISTENCE > 0


@@ 95,10 103,10 @@ void is31fl3746a_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3746A_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3746A_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT);
#endif
    }
}


@@ 156,14 164,14 @@ void is31fl3746a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) 
    if (index >= 0 && index < IS31FL3746A_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer_update_required[led.driver] = true;
        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 177,31 185,31 @@ void is31fl3746a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
    is31fl3746a_led_t led;
    memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));

    g_scaling_registers[led.driver][led.r]          = red;
    g_scaling_registers[led.driver][led.g]          = green;
    g_scaling_registers[led.driver][led.b]          = blue;
    g_scaling_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].scaling_buffer[led.r] = red;
    driver_buffers[led.driver].scaling_buffer[led.g] = green;
    driver_buffers[led.driver].scaling_buffer[led.b] = blue;
    driver_buffers[led.driver].scaling_buffer_dirty  = true;
}

void is31fl3746a_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);

        is31fl3746a_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3746a_update_scaling_registers(uint8_t index) {
    if (g_scaling_registers_update_required[index]) {
    if (driver_buffers[index].scaling_buffer_dirty) {
        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);

        for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
            is31fl3746a_write_register(index, i + 1, g_scaling_registers[index][i]);
            is31fl3746a_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
        }

        g_scaling_registers_update_required[index] = false;
        driver_buffers[index].scaling_buffer_dirty = false;
    }
}


M drivers/led/snled27351-mono.c => drivers/led/snled27351-mono.c +26 -18
@@ 56,11 56,19 @@ const uint8_t i2c_addresses[SNLED27351_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in snled27351_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[SNLED27351_DRIVER_COUNT][SNLED27351_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[SNLED27351_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[SNLED27351_DRIVER_COUNT][SNLED27351_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[SNLED27351_DRIVER_COUNT]                        = {false};
typedef struct snled27351_driver_t {
    uint8_t pwm_buffer[SNLED27351_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[SNLED27351_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED snled27351_driver_t;

snled27351_driver_t driver_buffers[SNLED27351_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void snled27351_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if SNLED27351_I2C_PERSISTENCE > 0


@@ 84,10 92,10 @@ void snled27351_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < SNLED27351_PWM_REGISTER_COUNT; i += 16) {
#if SNLED27351_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < SNLED27351_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, SNLED27351_I2C_TIMEOUT);
#endif
    }
}


@@ 160,12 168,12 @@ void snled27351_set_value(int index, uint8_t value) {
    if (index >= 0 && index < SNLED27351_LED_COUNT) {
        memcpy_P(&led, (&g_snled27351_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.v] == value) {
        if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
            return;
        }

        g_pwm_buffer[led.driver][led.v]          = value;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.v] = value;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 183,33 191,33 @@ void snled27351_set_led_control_register(uint8_t index, bool value) {
    uint8_t bit_value        = led.v % 8;

    if (value) {
        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] |= (1 << bit_value);
    } else {
        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
        driver_buffers[led.driver].led_control_buffer[control_register] &= ~(1 << bit_value);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void snled27351_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        snled27351_select_page(index, SNLED27351_COMMAND_PWM);

        snled27351_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void snled27351_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < SNLED27351_LED_CONTROL_REGISTER_COUNT; i++) {
            snled27351_write_register(index, i, g_led_control_registers[index][i]);
            snled27351_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M drivers/led/snled27351.c => drivers/led/snled27351.c +32 -24
@@ 56,11 56,19 @@ const uint8_t i2c_addresses[SNLED27351_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in snled27351_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[SNLED27351_DRIVER_COUNT][SNLED27351_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[SNLED27351_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[SNLED27351_DRIVER_COUNT][SNLED27351_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[SNLED27351_DRIVER_COUNT]                        = {false};
typedef struct snled27351_driver_t {
    uint8_t pwm_buffer[SNLED27351_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[SNLED27351_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED snled27351_driver_t;

snled27351_driver_t driver_buffers[SNLED27351_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void snled27351_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if SNLED27351_I2C_PERSISTENCE > 0


@@ 84,10 92,10 @@ void snled27351_write_pwm_buffer(uint8_t index) {
    for (uint8_t i = 0; i < SNLED27351_PWM_REGISTER_COUNT; i += 16) {
#if SNLED27351_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < SNLED27351_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT);
        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, SNLED27351_I2C_TIMEOUT);
#endif
    }
}


@@ 160,14 168,14 @@ void snled27351_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < SNLED27351_LED_COUNT) {
        memcpy_P(&led, (&g_snled27351_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 189,43 197,43 @@ void snled27351_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b              = led.b % 8;

    if (red) {
        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void snled27351_update_pwm_buffers(uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        snled27351_select_page(index, SNLED27351_COMMAND_PWM);

        snled27351_write_pwm_buffer(index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void snled27351_update_led_control_registers(uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);

        for (uint8_t i = 0; i < SNLED27351_LED_CONTROL_REGISTER_COUNT; i++) {
            snled27351_write_register(index, i, g_led_control_registers[index][i]);
            snled27351_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


M keyboards/input_club/k_type/is31fl3733-dual.c => keyboards/input_club/k_type/is31fl3733-dual.c +32 -24
@@ 80,11 80,19 @@ const uint8_t driver_sync[IS31FL3733_DRIVER_COUNT] = {
// We could optimize this and take out the unused registers from these
// buffers and the transfers in is31fl3733_write_pwm_buffer() but it's
// probably not worth the extra complexity.
uint8_t g_pwm_buffer[IS31FL3733_DRIVER_COUNT][IS31FL3733_PWM_REGISTER_COUNT];
bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};

uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
typedef struct is31fl3733_driver_t {
    uint8_t pwm_buffer[IS31FL3733_PWM_REGISTER_COUNT];
    bool    pwm_buffer_dirty;
    uint8_t led_control_buffer[IS31FL3733_LED_CONTROL_REGISTER_COUNT];
    bool    led_control_buffer_dirty;
} PACKED is31fl3733_driver_t;

is31fl3733_driver_t driver_buffers[IS31FL3733_DRIVER_COUNT] = {{
    .pwm_buffer               = {0},
    .pwm_buffer_dirty         = false,
    .led_control_buffer       = {0},
    .led_control_buffer_dirty = false,
}};

void is31fl3733_write_register(uint8_t bus, uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3733_I2C_PERSISTENCE > 0


@@ 109,10 117,10 @@ void is31fl3733_write_pwm_buffer(uint8_t bus, uint8_t index) {
    for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
#if IS31FL3733_I2C_PERSISTENCE > 0
        for (uint8_t j = 0; j < IS31FL3733_I2C_PERSISTENCE; j++) {
            if (i2c_write_register(bus, i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
            if (i2c_write_register(bus, i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
        }
#else
        i2c_write_register(bus, i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
        i2c_write_register(bus, i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3733_I2C_TIMEOUT);
#endif
    }
}


@@ 180,14 188,14 @@ void is31fl3733_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
    if (index >= 0 && index < IS31FL3733_LED_COUNT) {
        memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));

        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
        if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
            return;
        }

        g_pwm_buffer[led.driver][led.r]          = red;
        g_pwm_buffer[led.driver][led.g]          = green;
        g_pwm_buffer[led.driver][led.b]          = blue;
        g_pwm_buffer_update_required[led.driver] = true;
        driver_buffers[led.driver].pwm_buffer[led.r] = red;
        driver_buffers[led.driver].pwm_buffer[led.g] = green;
        driver_buffers[led.driver].pwm_buffer[led.b] = blue;
        driver_buffers[led.driver].pwm_buffer_dirty  = true;
    }
}



@@ 209,43 217,43 @@ void is31fl3733_set_led_control_register(uint8_t index, bool red, bool green, bo
    uint8_t bit_b              = led.b % 8;

    if (red) {
        g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
    } else {
        g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r);
        driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
    }
    if (green) {
        g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
    } else {
        g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g);
        driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
    }
    if (blue) {
        g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
    } else {
        g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b);
        driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
    }

    g_led_control_registers_update_required[led.driver] = true;
    driver_buffers[led.driver].led_control_buffer_dirty = true;
}

void is31fl3733_update_pwm_buffers(uint8_t bus, uint8_t index) {
    if (g_pwm_buffer_update_required[index]) {
    if (driver_buffers[index].pwm_buffer_dirty) {
        is31fl3733_select_page(bus, index, IS31FL3733_COMMAND_PWM);

        is31fl3733_write_pwm_buffer(bus, index);

        g_pwm_buffer_update_required[index] = false;
        driver_buffers[index].pwm_buffer_dirty = false;
    }
}

void is31fl3733_update_led_control_registers(uint8_t bus, uint8_t index) {
    if (g_led_control_registers_update_required[index]) {
    if (driver_buffers[index].led_control_buffer_dirty) {
        is31fl3733_select_page(bus, index, IS31FL3733_COMMAND_LED_CONTROL);

        for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
            is31fl3733_write_register(bus, index, i, g_led_control_registers[index][i]);
            is31fl3733_write_register(bus, index, i, driver_buffers[index].led_control_buffer[i]);
        }

        g_led_control_registers_update_required[index] = false;
        driver_buffers[index].led_control_buffer_dirty = false;
    }
}


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