#include "pin.h" #include "registers.h" #include void pin_init(pin_t* pin, GPIO_TypeDef *gpio, uint8_t pin_index) { pin->gpio = gpio; pin->pin = pin_index; } void pin_mode(pin_t *pin, pin_mode_t mode) { reg_write_bits_pos(&pin->gpio->MODER, (uint32_t)mode, pin->pin << 1, 0b11); } void pin_pull(pin_t *pin, pin_pullmode_t mode) { reg_write_bits_pos(&pin->gpio->PUPDR, (uint32_t)mode, pin->pin << 1, 0b11); } void pin_speed(pin_t *pin, pin_speedmode_t mode) { reg_write_bits_pos(&pin->gpio->OSPEEDR, (uint32_t)mode, pin->pin << 1, 0b11); } uint8_t pin_read(pin_t *pin) { return reg_read_bits_pos(&pin->gpio->IDR, pin->pin, 1); } uint8_t pin_write(pin_t *pin, uint8_t val) { if (val) { pin_set(pin); } else { pin_reset(pin); } } void pin_toggle(pin_t *pin) { reg_toggle_bits_pos(&pin->gpio->ODR, pin->pin, 1); } void pin_set(pin_t *pin) { pin->gpio->BSRR = 1 << pin->pin; } void pin_reset(pin_t *pin) { pin->gpio->BSRR = 1 << (pin->pin + GPIO_BSRR_BR0_Pos); } void pin_into_output(pin_t *pin) { pin_mode(pin, OUTPUT); } void pin_into_output_pushpull(pin_t *pin) { pin_into_output(pin); pin_into_pushpull(pin); } void pin_into_output_opendrain(pin_t *pin) { pin_into_output(pin); pin_into_opendrain(pin); } void pin_into_pushpull(pin_t *pin) { reg_write_bits_pos(&pin->gpio->OTYPER, 0, pin->pin, 1); } void pin_into_opendrain(pin_t *pin) { reg_write_bits_pos(&pin->gpio->OTYPER, 1, pin->pin, 1); } void pin_into_input(pin_t *pin) { pin_mode(pin, INPUT); } void pin_into_input_highspeed(pin_t *pin) { pin_into_input(pin); pin_into_highspeed(pin); } void pin_into_alternate(pin_t *pin, uint8_t alternate) { pin_mode(pin, ALTERNATE); pin_pull(pin, NONE); uint8_t index = pin->pin >> 3; uint8_t pos = (pin->pin & 0x7) * 4; volatile uint32_t *afr = pin->gpio->AFR; reg_write_bits_pos(afr + index, alternate, pos, 0xF); } void pin_into_alternate_highspeed(pin_t *pin, uint8_t alternate) { pin_into_alternate(pin, alternate); pin_into_highspeed(pin); } void pin_into_highspeed(pin_t *pin) { pin_speed(pin, VERY_HIGH_SPEED); }