~ruther/qmk_firmware

952e805edb5b5c42a8bbe35b6689c28943a53858 — zvecr 5 years ago 619ee54
Initial refactor of ergo42 to split common
14 files changed, 26 insertions(+), 1106 deletions(-)

M keyboards/ergo42/config.h
M keyboards/ergo42/ergo42.h
D keyboards/ergo42/i2c.c
D keyboards/ergo42/i2c.h
D keyboards/ergo42/matrix.c
M keyboards/ergo42/readme.md
M keyboards/ergo42/rev1/config.h
M keyboards/ergo42/rev1/rev1.c
M keyboards/ergo42/rev1/rev1.h
M keyboards/ergo42/rules.mk
D keyboards/ergo42/serial.c
D keyboards/ergo42/serial.h
D keyboards/ergo42/split_util.c
D keyboards/ergo42/split_util.h
M keyboards/ergo42/config.h => keyboards/ergo42/config.h +1 -4
@@ 16,9 16,6 @@ You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef CONFIG_H
#define CONFIG_H
#pragma once

#include "config_common.h"

#endif

M keyboards/ergo42/ergo42.h => keyboards/ergo42/ergo42.h +1 -5
@@ 1,5 1,4 @@
#ifndef ERGO42_H
#define ERGO42_H
#pragma once

#include "quantum.h"



@@ 7,7 6,6 @@
    #include "rev1.h"
#endif


// Used to create a keymap using only KC_ prefixed keys
#define LAYOUT_kc_ortho_4x14( \
    L00, L01, L02, L03, L04, L05, L06, R00, R01, R02, R03, R04, R05, R06, \


@@ 23,5 21,3 @@
    )

#define LAYOUT_kc LAYOUT_kc_ortho_4x14

#endif

D keyboards/ergo42/i2c.c => keyboards/ergo42/i2c.c +0 -162
@@ 1,162 0,0 @@
#include <util/twi.h>
#include <avr/io.h>
#include <stdlib.h>
#include <avr/interrupt.h>
#include <util/twi.h>
#include <stdbool.h>
#include "i2c.h"

#ifdef USE_I2C

// Limits the amount of we wait for any one i2c transaction.
// Since were running SCL line 100kHz (=> 10μs/bit), and each transactions is
// 9 bits, a single transaction will take around 90μs to complete.
//
// (F_CPU/SCL_CLOCK)  =>  # of μC cycles to transfer a bit
// poll loop takes at least 8 clock cycles to execute
#define I2C_LOOP_TIMEOUT (9+1)*(F_CPU/SCL_CLOCK)/8

#define BUFFER_POS_INC() (slave_buffer_pos = (slave_buffer_pos+1)%SLAVE_BUFFER_SIZE)

volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];

static volatile uint8_t slave_buffer_pos;
static volatile bool slave_has_register_set = false;

// Wait for an i2c operation to finish
inline static
void i2c_delay(void) {
  uint16_t lim = 0;
  while(!(TWCR & (1<<TWINT)) && lim < I2C_LOOP_TIMEOUT)
    lim++;

  // easier way, but will wait slightly longer
  // _delay_us(100);
}

// Setup twi to run at 100kHz
void i2c_master_init(void) {
  // no prescaler
  TWSR = 0;
  // Set TWI clock frequency to SCL_CLOCK. Need TWBR>10.
  // Check datasheets for more info.
  TWBR = ((F_CPU/SCL_CLOCK)-16)/2;
}

// Start a transaction with the given i2c slave address. The direction of the
// transfer is set with I2C_READ and I2C_WRITE.
// returns: 0 => success
//          1 => error
uint8_t i2c_master_start(uint8_t address) {
  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTA);

  i2c_delay();

  // check that we started successfully
  if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
    return 1;

  TWDR = address;
  TWCR = (1<<TWINT) | (1<<TWEN);

  i2c_delay();

  if ( (TW_STATUS != TW_MT_SLA_ACK) && (TW_STATUS != TW_MR_SLA_ACK) )
    return 1; // slave did not acknowledge
  else
    return 0; // success
}


// Finish the i2c transaction.
void i2c_master_stop(void) {
  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);

  uint16_t lim = 0;
  while(!(TWCR & (1<<TWSTO)) && lim < I2C_LOOP_TIMEOUT)
    lim++;
}

// Write one byte to the i2c slave.
// returns 0 => slave ACK
//         1 => slave NACK
uint8_t i2c_master_write(uint8_t data) {
  TWDR = data;
  TWCR = (1<<TWINT) | (1<<TWEN);

  i2c_delay();

  // check if the slave acknowledged us
  return (TW_STATUS == TW_MT_DATA_ACK) ? 0 : 1;
}

// Read one byte from the i2c slave. If ack=1 the slave is acknowledged,
// if ack=0 the acknowledge bit is not set.
// returns: byte read from i2c device
uint8_t i2c_master_read(int ack) {
  TWCR = (1<<TWINT) | (1<<TWEN) | (ack<<TWEA);

  i2c_delay();
  return TWDR;
}

void i2c_reset_state(void) {
  TWCR = 0;
}

void i2c_slave_init(uint8_t address) {
  TWAR = address << 0; // slave i2c address
  // TWEN  - twi enable
  // TWEA  - enable address acknowledgement
  // TWINT - twi interrupt flag
  // TWIE  - enable the twi interrupt
  TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWINT) | (1<<TWEN);
}

ISR(TWI_vect);

ISR(TWI_vect) {
  uint8_t ack = 1;
  switch(TW_STATUS) {
    case TW_SR_SLA_ACK:
      // this device has been addressed as a slave receiver
      slave_has_register_set = false;
      break;

    case TW_SR_DATA_ACK:
      // this device has received data as a slave receiver
      // The first byte that we receive in this transaction sets the location
      // of the read/write location of the slaves memory that it exposes over
      // i2c.  After that, bytes will be written at slave_buffer_pos, incrementing
      // slave_buffer_pos after each write.
      if(!slave_has_register_set) {
        slave_buffer_pos = TWDR;
        // don't acknowledge the master if this memory loctaion is out of bounds
        if ( slave_buffer_pos >= SLAVE_BUFFER_SIZE ) {
          ack = 0;
          slave_buffer_pos = 0;
        }
        slave_has_register_set = true;
      } else {
        i2c_slave_buffer[slave_buffer_pos] = TWDR;
        BUFFER_POS_INC();
      }
      break;

    case TW_ST_SLA_ACK:
    case TW_ST_DATA_ACK:
      // master has addressed this device as a slave transmitter and is
      // requesting data.
      TWDR = i2c_slave_buffer[slave_buffer_pos];
      BUFFER_POS_INC();
      break;

    case TW_BUS_ERROR: // something went wrong, reset twi state
      TWCR = 0;
    default:
      break;
  }
  // Reset everything, so we are ready for the next TWI interrupt
  TWCR |= (1<<TWIE) | (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
}
#endif

D keyboards/ergo42/i2c.h => keyboards/ergo42/i2c.h +0 -49
@@ 1,49 0,0 @@
#ifndef I2C_H
#define I2C_H

#include <stdint.h>

#ifndef F_CPU
#define F_CPU 16000000UL
#endif

#define I2C_READ 1
#define I2C_WRITE 0

#define I2C_ACK 1
#define I2C_NACK 0

#define SLAVE_BUFFER_SIZE 0x10

// i2c SCL clock frequency
#define SCL_CLOCK  400000L

extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];

void i2c_master_init(void);
uint8_t i2c_master_start(uint8_t address);
void i2c_master_stop(void);
uint8_t i2c_master_write(uint8_t data);
uint8_t i2c_master_read(int);
void i2c_reset_state(void);
void i2c_slave_init(uint8_t address);


static inline unsigned char i2c_start_read(unsigned char addr) {
  return i2c_master_start((addr << 1) | I2C_READ);
}

static inline unsigned char i2c_start_write(unsigned char addr) {
  return i2c_master_start((addr << 1) | I2C_WRITE);
}

// from SSD1306 scrips
extern unsigned char i2c_rep_start(unsigned char addr);
extern void i2c_start_wait(unsigned char addr);
extern unsigned char i2c_readAck(void);
extern unsigned char i2c_readNak(void);
extern unsigned char i2c_read(unsigned char ack);

#define i2c_read(ack)  (ack) ? i2c_readAck() : i2c_readNak();

#endif

D keyboards/ergo42/matrix.c => keyboards/ergo42/matrix.c +0 -459
@@ 1,459 0,0 @@
/*
Copyright 2012 Jun Wako <wakojun@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
 * scan matrix
 */
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "split_util.h"
#include "pro_micro.h"
#include "config.h"
#include "timer.h"

#ifdef USE_I2C
#  include "i2c.h"
#else // USE_SERIAL
#  include "serial.h"
#endif

#ifndef DEBOUNCE
#   define DEBOUNCE 5
#endif

#if (DEBOUNCE > 0)
    static uint16_t debouncing_time;
    static bool debouncing = false;
#endif

#if (MATRIX_COLS <= 8)
#    define print_matrix_header()  print("\nr/c 01234567\n")
#    define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
#    define matrix_bitpop(i)       bitpop(matrix[i])
#    define ROW_SHIFTER ((uint8_t)1)
#else
#    error "Currently only supports 8 COLS"
#endif
static matrix_row_t matrix_debouncing[MATRIX_ROWS];

#define ERROR_DISCONNECT_COUNT 5

#define ROWS_PER_HAND (MATRIX_ROWS/2)

static uint8_t error_count = 0;

static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;

/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];

#if (DIODE_DIRECTION == COL2ROW)
    static void init_cols(void);
    static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
    static void unselect_rows(void);
    static void select_row(uint8_t row);
    static void unselect_row(uint8_t row);
#elif (DIODE_DIRECTION == ROW2COL)
    static void init_rows(void);
    static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
    static void unselect_cols(void);
    static void unselect_col(uint8_t col);
    static void select_col(uint8_t col);
#endif

__attribute__ ((weak))
void matrix_init_kb(void) {
    matrix_init_user();
}

__attribute__ ((weak))
void matrix_scan_kb(void) {
    matrix_scan_user();
}

__attribute__ ((weak))
void matrix_init_user(void) {
}

__attribute__ ((weak))
void matrix_scan_user(void) {
}

inline
uint8_t matrix_rows(void)
{
    return MATRIX_ROWS;
}

inline
uint8_t matrix_cols(void)
{
    return MATRIX_COLS;
}

void matrix_init(void)
{
    debug_enable = true;
    debug_matrix = true;
    debug_mouse = true;
    // initialize row and col
#if (DIODE_DIRECTION == COL2ROW)
    unselect_rows();
    init_cols();
#elif (DIODE_DIRECTION == ROW2COL)
    unselect_cols();
    init_rows();
#endif

    TX_RX_LED_INIT;

    // initialize matrix state: all keys off
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        matrix[i] = 0;
        matrix_debouncing[i] = 0;
    }

    matrix_init_quantum();

}

uint8_t _matrix_scan(void)
{
    int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
#if (DIODE_DIRECTION == COL2ROW)
    // Set row, read cols
    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
#       if (DEBOUNCE > 0)
            bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);

            if (matrix_changed) {
                debouncing = true;
                debouncing_time = timer_read();
            }

#       else
            read_cols_on_row(matrix+offset, current_row);
#       endif

    }

#elif (DIODE_DIRECTION == ROW2COL)
    // Set col, read rows
    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
#       if (DEBOUNCE > 0)
            bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
            if (matrix_changed) {
                debouncing = true;
                debouncing_time = timer_read();
            }
#       else
             read_rows_on_col(matrix+offset, current_col);
#       endif

    }
#endif

#   if (DEBOUNCE > 0)
        if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
            for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
                matrix[i+offset] = matrix_debouncing[i+offset];
            }
            debouncing = false;
        }
#   endif

    return 1;
}

#ifdef USE_I2C

// Get rows from other half over i2c
int i2c_transaction(void) {
    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;

    int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
    if (err) goto i2c_error;

    // start of matrix stored at 0x00
    err = i2c_master_write(0x00);
    if (err) goto i2c_error;

    // Start read
    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
    if (err) goto i2c_error;

    if (!err) {
        int i;
        for (i = 0; i < ROWS_PER_HAND-1; ++i) {
            matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
        }
        matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
        i2c_master_stop();
    } else {
i2c_error: // the cable is disconnceted, or something else went wrong
        i2c_reset_state();
        return err;
    }

    return 0;
}

#else // USE_SERIAL

int serial_transaction(void) {
    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;

    if (serial_update_buffers()) {
        return 1;
    }

    for (int i = 0; i < ROWS_PER_HAND; ++i) {
        matrix[slaveOffset+i] = serial_slave_buffer[i];
    }
    return 0;
}
#endif

uint8_t matrix_scan(void)
{
    uint8_t ret = _matrix_scan();

#ifdef USE_I2C
    if( i2c_transaction() ) {
#else // USE_SERIAL
    if( serial_transaction() ) {
#endif
        // turn on the indicator led when halves are disconnected
        TXLED1;

        error_count++;

        if (error_count > ERROR_DISCONNECT_COUNT) {
            // reset other half if disconnected
            int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
            for (int i = 0; i < ROWS_PER_HAND; ++i) {
                matrix[slaveOffset+i] = 0;
            }
        }
    } else {
        // turn off the indicator led on no error
        TXLED0;
        error_count = 0;
    }
    matrix_scan_quantum();
    return ret;
}

void matrix_slave_scan(void) {
    _matrix_scan();

    int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;

#ifdef USE_I2C
    for (int i = 0; i < ROWS_PER_HAND; ++i) {
        i2c_slave_buffer[i] = matrix[offset+i];
    }
#else // USE_SERIAL
    for (int i = 0; i < ROWS_PER_HAND; ++i) {
        serial_slave_buffer[i] = matrix[offset+i];
    }
#endif
}

bool matrix_is_modified(void)
{
    if (debouncing) return false;
    return true;
}

inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
    return (matrix[row] & ((matrix_row_t)1<<col));
}

inline
matrix_row_t matrix_get_row(uint8_t row)
{
    return matrix[row];
}

void matrix_print(void)
{
    print("\nr/c 0123456789ABCDEF\n");
    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
        phex(row); print(": ");
        pbin_reverse16(matrix_get_row(row));
        print("\n");
    }
}

uint8_t matrix_key_count(void)
{
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        count += bitpop16(matrix[i]);
    }
    return count;
}

#if (DIODE_DIRECTION == COL2ROW)

static void init_cols(void)
{
    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
        uint8_t pin = col_pins[x];
        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
    }
}

static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
{
    // Store last value of row prior to reading
    matrix_row_t last_row_value = current_matrix[current_row];

    // Clear data in matrix row
    current_matrix[current_row] = 0;

    // Select row and wait for row selecton to stabilize
    select_row(current_row);
    wait_us(30);

    // For each col...
    for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {

        // Select the col pin to read (active low)
        uint8_t pin = col_pins[col_index];
        uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));

        // Populate the matrix row with the state of the col pin
        current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << col_index);
    }

    // Unselect row
    unselect_row(current_row);

    return (last_row_value != current_matrix[current_row]);
}

static void select_row(uint8_t row)
{
    uint8_t pin = row_pins[row];
    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}

static void unselect_row(uint8_t row)
{
    uint8_t pin = row_pins[row];
    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
}

static void unselect_rows(void)
{
    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
        uint8_t pin = row_pins[x];
        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
    }
}

#elif (DIODE_DIRECTION == ROW2COL)

static void init_rows(void)
{
    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
        uint8_t pin = row_pins[x];
        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
    }
}

static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
{
    bool matrix_changed = false;

    // Select col and wait for col selecton to stabilize
    select_col(current_col);
    wait_us(30);

    // For each row...
    for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
    {

        // Store last value of row prior to reading
        matrix_row_t last_row_value = current_matrix[row_index];

        // Check row pin state
        if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
        {
            // Pin LO, set col bit
            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
        }
        else
        {
            // Pin HI, clear col bit
            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
        }

        // Determine if the matrix changed state
        if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
        {
            matrix_changed = true;
        }
    }

    // Unselect col
    unselect_col(current_col);

    return matrix_changed;
}

static void select_col(uint8_t col)
{
    uint8_t pin = col_pins[col];
    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}

static void unselect_col(uint8_t col)
{
    uint8_t pin = col_pins[col];
    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
}

static void unselect_cols(void)
{
    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
        uint8_t pin = col_pins[x];
        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
    }
}

#endif

M keyboards/ergo42/readme.md => keyboards/ergo42/readme.md +5 -5
@@ 5,12 5,12 @@
__The Answer to the Ultimate Question of Life, the Universe, and at least Keyboards.__  
A split 7x4 ortholinear keyboard. [Hardware project repo](https://github.com/Biacco42/Ergo42)

Keyboard Maintainer: [Biacco42](https://github.com/Biacco42) [@Biacco42](https://twitter.com/Biacco42)  
Hardware Supported: Ergo42 PCB, Pro Micro ATmega32u4  
Hardware Availability: [Ergo42 PCB and case](https://github.com/Biacco42/Ergo42)
* Keyboard Maintainer: [Biacco42](https://github.com/Biacco42) [@Biacco42](https://twitter.com/Biacco42)
* Hardware Supported: Ergo42 PCB, Pro Micro ATmega32u4
* Hardware Availability: [Ergo42 PCB and case](https://github.com/Biacco42/Ergo42)

Make example for this keyboard (after setting up your build environment):

    make ergo42/rev1:default:avrdude
    make ergo42/rev1:default:flash

See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

M keyboards/ergo42/rev1/config.h => keyboards/ergo42/rev1/config.h +2 -7
@@ 17,8 17,7 @@ You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef REV1_CONFIG_H
#define REV1_CONFIG_H
#pragma once

#include "config_common.h"



@@ 40,8 39,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
#define MATRIX_COL_PINS { F5, F6, F7, B1, B3, B2, B6 }
// #define MATRIX_COL_PINS { B6, B2, B3, B1, F7, F6 } //uncomment this line and comment line above if you need to reverse left-to-right key order

/* define tapping term */
#define TAPPING_TERM 100
#define SOFT_SERIAL_PIN D0

/* define if matrix has ghost */
//#define MATRIX_HAS_GHOST


@@ 59,7 57,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.

/* ws2812 RGB LED */
#define RGB_DI_PIN D3

#define RGBLED_NUM 12    // Number of LEDs

/*


@@ 79,5 76,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
//#define NO_ACTION_ONESHOT
//#define NO_ACTION_MACRO
//#define NO_ACTION_FUNCTION

#endif

M keyboards/ergo42/rev1/rev1.c => keyboards/ergo42/rev1/rev1.c +0 -21
@@ 1,22 1,1 @@
#include "ergo42.h"

#ifdef SSD1306OLED
void led_set_kb(uint8_t usb_led) {
    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
    led_set_user(usb_led);
}
#endif

void matrix_init_kb(void) {

    // // green led on
    // DDRD |= (1<<5);
    // PORTD &= ~(1<<5);

    // // orange led on
    // DDRB |= (1<<0);
    // PORTB &= ~(1<<0);

	matrix_init_user();
};


M keyboards/ergo42/rev1/rev1.h => keyboards/ergo42/rev1/rev1.h +1 -12
@@ 1,18 1,9 @@
#ifndef REV1_H
#define REV1_H
#pragma once

#include "ergo42.h"

#include "quantum.h"

#ifdef USE_I2C
#include <stddef.h>
#ifdef __AVR__
	#include <avr/io.h>
	#include <avr/interrupt.h>
#endif
#endif

#ifndef FLIP_HALF
// Standard Keymap
// (TRRS jack on the left half is to the right, TRRS jack on the right half is to the left)


@@ 54,5 45,3 @@
#endif

#define LAYOUT LAYOUT_ortho_4x14

#endif

M keyboards/ergo42/rules.mk => keyboards/ergo42/rules.mk +16 -22
@@ 12,32 12,26 @@ MCU = atmega32u4
BOOTLOADER = caterina

# Build Options
#   change to "no" to disable the options, or define them in the Makefile in
#   the appropriate keymap folder that will get included automatically
#   change yes to no to disable
#
BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
CONSOLE_ENABLE = no         # Console for debug(+400)
BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
MOUSEKEY_ENABLE = yes       # Mouse keys
EXTRAKEY_ENABLE = yes       # Audio control and System control
CONSOLE_ENABLE = no         # Console for debug
COMMAND_ENABLE = yes        # Commands for debug and configuration
NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
MIDI_ENABLE = no            # MIDI controls
AUDIO_ENABLE = no           # Audio output on port C6
UNICODE_ENABLE = no         # Unicode
BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
RGBLIGHT_ENABLE = no       # Enable WS2812 RGB underlight. 
SUBPROJECT_rev1 = yes
USE_I2C = yes
# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
NKRO_ENABLE = no            # USB Nkey Rollover
BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
MIDI_ENABLE = no            # MIDI support
BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
AUDIO_ENABLE = no           # Audio output on port C6
FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
HD44780_ENABLE = no         # Enable support for HD44780 based LCDs

CUSTOM_MATRIX = yes
SRC += matrix.c \
	   i2c.c \
	   split_util.c \
	   serial.c \
	   ssd1306.c
SPLIT_KEYBOARD = yes

LAYOUTS = ortho_4x14


D keyboards/ergo42/serial.c => keyboards/ergo42/serial.c +0 -228
@@ 1,228 0,0 @@
/*
 * WARNING: be careful changing this code, it is very timing dependent
 */

#ifndef F_CPU
#define F_CPU 16000000
#endif

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stdbool.h>
#include "serial.h"

#ifndef USE_I2C

// Serial pulse period in microseconds. Its probably a bad idea to lower this
// value.
#define SERIAL_DELAY 24

uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};

#define SLAVE_DATA_CORRUPT (1<<0)
volatile uint8_t status = 0;

inline static
void serial_delay(void) {
  _delay_us(SERIAL_DELAY);
}

inline static
void serial_output(void) {
  SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
}

// make the serial pin an input with pull-up resistor
inline static
void serial_input(void) {
  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
}

inline static
uint8_t serial_read_pin(void) {
  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
}

inline static
void serial_low(void) {
  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
}

inline static
void serial_high(void) {
  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
}

void serial_master_init(void) {
  serial_output();
  serial_high();
}

void serial_slave_init(void) {
  serial_input();

  // Enable INT0
  EIMSK |= _BV(INT0);
  // Trigger on falling edge of INT0
  EICRA &= ~(_BV(ISC00) | _BV(ISC01));
}

// Used by the master to synchronize timing with the slave.
static
void sync_recv(void) {
  serial_input();
  // This shouldn't hang if the slave disconnects because the
  // serial line will float to high if the slave does disconnect.
  while (!serial_read_pin());
  serial_delay();
}

// Used by the slave to send a synchronization signal to the master.
static
void sync_send(void) {
  serial_output();

  serial_low();
  serial_delay();

  serial_high();
}

// Reads a byte from the serial line
static
uint8_t serial_read_byte(void) {
  uint8_t byte = 0;
  serial_input();
  for ( uint8_t i = 0; i < 8; ++i) {
    byte = (byte << 1) | serial_read_pin();
    serial_delay();
    _delay_us(1);
  }

  return byte;
}

// Sends a byte with MSB ordering
static
void serial_write_byte(uint8_t data) {
  uint8_t b = 8;
  serial_output();
  while( b-- ) {
    if(data & (1 << b)) {
      serial_high();
    } else {
      serial_low();
    }
    serial_delay();
  }
}

// interrupt handle to be used by the slave device
ISR(SERIAL_PIN_INTERRUPT) {
  sync_send();

  uint8_t checksum = 0;
  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
    serial_write_byte(serial_slave_buffer[i]);
    sync_send();
    checksum += serial_slave_buffer[i];
  }
  serial_write_byte(checksum);
  sync_send();

  // wait for the sync to finish sending
  serial_delay();

  // read the middle of pulses
  _delay_us(SERIAL_DELAY/2);

  uint8_t checksum_computed = 0;
  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
    serial_master_buffer[i] = serial_read_byte();
    sync_send();
    checksum_computed += serial_master_buffer[i];
  }
  uint8_t checksum_received = serial_read_byte();
  sync_send();

  serial_input(); // end transaction

  if ( checksum_computed != checksum_received ) {
    status |= SLAVE_DATA_CORRUPT;
  } else {
    status &= ~SLAVE_DATA_CORRUPT;
  }
}

inline
bool serial_slave_DATA_CORRUPT(void) {
  return status & SLAVE_DATA_CORRUPT;
}

// Copies the serial_slave_buffer to the master and sends the
// serial_master_buffer to the slave.
//
// Returns:
// 0 => no error
// 1 => slave did not respond
int serial_update_buffers(void) {
  // this code is very time dependent, so we need to disable interrupts
  cli();

  // signal to the slave that we want to start a transaction
  serial_output();
  serial_low();
  _delay_us(1);

  // wait for the slaves response
  serial_input();
  serial_high();
  _delay_us(SERIAL_DELAY);

  // check if the slave is present
  if (serial_read_pin()) {
    // slave failed to pull the line low, assume not present
    sei();
    return 1;
  }

  // if the slave is present syncronize with it
  sync_recv();

  uint8_t checksum_computed = 0;
  // receive data from the slave
  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
    serial_slave_buffer[i] = serial_read_byte();
    sync_recv();
    checksum_computed += serial_slave_buffer[i];
  }
  uint8_t checksum_received = serial_read_byte();
  sync_recv();

  if (checksum_computed != checksum_received) {
    sei();
    return 1;
  }

  uint8_t checksum = 0;
  // send data to the slave
  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
    serial_write_byte(serial_master_buffer[i]);
    sync_recv();
    checksum += serial_master_buffer[i];
  }
  serial_write_byte(checksum);
  sync_recv();

  // always, release the line when not in use
  serial_output();
  serial_high();

  sei();
  return 0;
}

#endif

D keyboards/ergo42/serial.h => keyboards/ergo42/serial.h +0 -26
@@ 1,26 0,0 @@
#ifndef MY_SERIAL_H
#define MY_SERIAL_H

#include "config.h"
#include <stdbool.h>

/* TODO:  some defines for interrupt setup */
#define SERIAL_PIN_DDR DDRD
#define SERIAL_PIN_PORT PORTD
#define SERIAL_PIN_INPUT PIND
#define SERIAL_PIN_MASK _BV(PD0)
#define SERIAL_PIN_INTERRUPT INT0_vect

#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH 1

// Buffers for master - slave communication
extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];

void serial_master_init(void);
void serial_slave_init(void);
int serial_update_buffers(void);
bool serial_slave_data_corrupt(void);

#endif

D keyboards/ergo42/split_util.c => keyboards/ergo42/split_util.c +0 -86
@@ 1,86 0,0 @@
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/power.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/eeprom.h>
#include "split_util.h"
#include "matrix.h"
#include "keyboard.h"
#include "config.h"
#include "timer.h"

#ifdef USE_I2C
#  include "i2c.h"
#else
#  include "serial.h"
#endif

volatile bool isLeftHand = true;

static void setup_handedness(void) {
  #ifdef EE_HANDS
    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
  #else
    // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
    #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
      isLeftHand = !has_usb();
    #else
      isLeftHand = has_usb();
    #endif
  #endif
}

static void keyboard_master_setup(void) {
#ifdef USE_I2C
    i2c_master_init();
#ifdef SSD1306OLED
    matrix_master_OLED_init ();
#endif
#else
    serial_master_init();
#endif
}

static void keyboard_slave_setup(void) {
  timer_init();
#ifdef USE_I2C
    i2c_slave_init(SLAVE_I2C_ADDRESS);
#else
    serial_slave_init();
#endif
}

bool has_usb(void) {
   USBCON |= (1 << OTGPADE); //enables VBUS pad
   _delay_us(5);
   return (USBSTA & (1<<VBUS));  //checks state of VBUS
}

void split_keyboard_setup(void) {
   setup_handedness();

   if (has_usb()) {
      keyboard_master_setup();
   } else {
      keyboard_slave_setup();
   }
   sei();
}

void keyboard_slave_loop(void) {
   matrix_init();

   while (1) {
      matrix_slave_scan();
   }
}

// this code runs before the usb and keyboard is initialized
void matrix_setup(void) {
    split_keyboard_setup();

    if (!has_usb()) {
        keyboard_slave_loop();
    }
}

D keyboards/ergo42/split_util.h => keyboards/ergo42/split_util.h +0 -20
@@ 1,20 0,0 @@
#ifndef SPLIT_KEYBOARD_UTIL_H
#define SPLIT_KEYBOARD_UTIL_H

#include <stdbool.h>
#include "eeconfig.h"

#define SLAVE_I2C_ADDRESS           0x32

extern volatile bool isLeftHand;

// slave version of matix scan, defined in matrix.c
void matrix_slave_scan(void);

void split_keyboard_setup(void);
bool has_usb(void);
void keyboard_slave_loop(void);

void matrix_master_OLED_init (void);

#endif