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Refactor mint60 to use split_common (#8084)

This commit is contained in:
Joel Challis 2020-02-07 13:58:55 +00:00 committed by GitHub
parent fb6f581157
commit c93093569e
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GPG Key ID: 4AEE18F83AFDEB23
13 changed files with 13 additions and 1072 deletions
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11
keyboards/mint60/config.h
View File

@ -18,7 +18,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#pragma once
#include "config_common.h"
#include <serial_config.h>
/* USB Device descriptor parameter */
#define VENDOR_ID 0xFEED
@ -28,11 +27,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#define PRODUCT Mint60
#define DESCRIPTION A row staggered split keyboard
#define TAPPING_FORCE_HOLD
#define TAPPING_TERM 100
#define USE_SERIAL
/* key matrix size */
#define MATRIX_ROWS 10
#define MATRIX_COLS 8
@ -54,6 +48,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
/* COL2ROW, ROW2COL*/
#define DIODE_DIRECTION COL2ROW
/*
* Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
*/
#define SOFT_SERIAL_PIN D2
// #define BACKLIGHT_PIN B7
// #define BACKLIGHT_BREATHING
// #define BACKLIGHT_LEVELS 3

162
keyboards/mint60/i2c.c
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@ -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 or 400kHz (see ./i2c.h SCL_CLOCK)
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

49
keyboards/mint60/i2c.h
View File

@ -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 400kHz
#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

28
keyboards/mint60/keymaps/default/keymap.c
View File

@ -14,22 +14,11 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include QMK_KEYBOARD_H
#ifdef PROTOCOL_LUFA
#include "lufa.h"
#include "split_util.h"
#endif
#ifdef RGBLIGHT_ENABLE
//Following line allows macro to read current RGB settings
extern rgblight_config_t rgblight_config;
#endif
enum custom_keycodes {
RGBRST = SAFE_RANGE
};
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = LAYOUT( \
KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC, \
@ -47,10 +36,6 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
)
};
// define variables for reactive RGB
bool TOG_STATUS = false;
int RGB_current_mode;
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case RGBRST:
@ -58,22 +43,9 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
if (record->event.pressed) {
eeconfig_update_rgblight_default();
rgblight_enable();
RGB_current_mode = rgblight_config.mode;
}
#endif
break;
}
return true;
}
void matrix_init_user(void) {
}
void matrix_scan_user(void) {
}
void led_set_user(uint8_t usb_led) {
}

343
keyboards/mint60/matrix.c
View File

@ -1,343 +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 <avr/wdt.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "split_util.h"
#include "pro_micro.h"
#ifdef USE_I2C
# include "i2c.h"
#else // USE_SERIAL
# include "serial.h"
#endif
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
#define ERROR_DISCONNECT_COUNT 5
static uint8_t debouncing = DEBOUNCE;
static const int ROWS_PER_HAND = MATRIX_ROWS/2;
static uint8_t error_count = 0;
uint8_t is_master = 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];
static matrix_row_t read_cols(void);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
static uint8_t matrix_master_scan(void);
__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
unselect_rows();
init_cols();
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;
}
is_master = has_usb();
matrix_init_quantum();
}
uint8_t _matrix_scan(void)
{
// Right hand is stored after the left in the matirx so, we need to offset it
int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
select_row(i);
_delay_us(30); // without this wait read unstable value.
matrix_row_t cols = read_cols();
if (matrix_debouncing[i+offset] != cols) {
matrix_debouncing[i+offset] = cols;
debouncing = DEBOUNCE;
}
unselect_rows();
}
if (debouncing) {
if (--debouncing) {
_delay_ms(1);
} else {
for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
matrix[i+offset] = matrix_debouncing[i+offset];
}
}
}
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;
int ret=serial_update_buffers();
if (ret ) {
if(ret==2)RXLED1;
return 1;
}
RXLED0;
for (int i = 0; i < ROWS_PER_HAND; ++i) {
matrix[slaveOffset+i] = serial_slave_buffer[i];
}
return 0;
}
#endif
uint8_t matrix_scan(void)
{
if (is_master) {
matrix_master_scan();
}else{
matrix_slave_scan();
int offset = (isLeftHand) ? ROWS_PER_HAND : 0;
for (int i = 0; i < ROWS_PER_HAND; ++i) {
matrix[offset+i] = serial_master_buffer[i];
}
matrix_scan_quantum();
}
return 1;
}
uint8_t matrix_master_scan(void) {
int ret = _matrix_scan();
#ifndef KEYBOARD_helix_rev1
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]; */
// i2c_slave_buffer[i] = matrix[offset+i];
// }
#else // USE_SERIAL
for (int i = 0; i < ROWS_PER_HAND; ++i) {
serial_master_buffer[i] = matrix[offset+i];
}
#endif
#endif
#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]; */
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;
}
static void init_cols(void)
{
for(int x = 0; x < MATRIX_COLS; x++) {
_SFR_IO8((col_pins[x] >> 4) + 1) &= ~_BV(col_pins[x] & 0xF);
_SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
}
}
static matrix_row_t read_cols(void)
{
matrix_row_t result = 0;
for(int x = 0; x < MATRIX_COLS; x++) {
result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
}
return result;
}
static void unselect_rows(void)
{
for(int x = 0; x < ROWS_PER_HAND; x++) {
_SFR_IO8((row_pins[x] >> 4) + 1) &= ~_BV(row_pins[x] & 0xF);
_SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
}
}
static void select_row(uint8_t row)
{
_SFR_IO8((row_pins[row] >> 4) + 1) |= _BV(row_pins[row] & 0xF);
_SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);
}

27
keyboards/mint60/mint60.c
View File

@ -14,30 +14,3 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mint60.h"
void matrix_init_kb(void) {
// put your keyboard start-up code here
// runs once when the firmware starts up
matrix_init_user();
}
void matrix_scan_kb(void) {
// put your looping keyboard code here
// runs every cycle (a lot)
matrix_scan_user();
}
bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
// put your per-action keyboard code here
// runs for every action, just before processing by the firmware
return process_record_user(keycode, record);
}
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);
}

19
keyboards/mint60/mint60.h
View File

@ -13,25 +13,10 @@
* 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 MINT60_H
#define MINT60_H
#pragma once
#include "quantum.h"
#ifdef RGBLIGHT_ENABLE
//rgb led driver
#include "ws2812.h"
#endif
#ifdef USE_I2C
#include <stddef.h>
#ifdef __AVR__
#include <avr/io.h>
#include <avr/interrupt.h>
#endif
#endif
// This a shortcut to help you visually see your layout.
// The following is an example using the Planck MIT layout
// The first section contains all of the arguments
@ -55,5 +40,3 @@
{ R30, R31, R32, R33, R34, R35, R36, R37 }, \
{ R40, R41, KC_NO, R43, KC_NO, R45, R46, R47 }, \
}
#endif

19
keyboards/mint60/rules.mk
View File

@ -14,16 +14,17 @@ BOOTLOADER = caterina
# Build Options
# change yes to no to disable
#
BOOTMAGIC_ENABLE = no # Virtual DIP switch configuration
MOUSEKEY_ENABLE = no # Mouse keys
EXTRAKEY_ENABLE = no # Audio control and System control
CONSOLE_ENABLE = no # Console for debug
COMMAND_ENABLE = no # Commands for debug and configuration
BOOTMAGIC_ENABLE = no # Virtual DIP switch configuration
MOUSEKEY_ENABLE = no # Mouse keys
EXTRAKEY_ENABLE = no # Audio control and System control
CONSOLE_ENABLE = no # Console for debug
COMMAND_ENABLE = no # Commands for debug and configuration
# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
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 on B7 by default
RGBLIGHT_ENABLE = yes # Enable WS2812 RGB underlight.
MIDI_ENABLE = no # MIDI support
UNICODE_ENABLE = no # Unicode
BLUETOOTH_ENABLE = no # Enable Bluetooth with the Adafruit EZ-Key HID
@ -31,10 +32,4 @@ 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 += i2c.c \
serial.c \
matrix.c \
split_util.c
USE_I2C = yes
RGBLIGHT_ENABLE = yes # Enable WS2812 RGB underlight.
SPLIT_KEYBOARD = yes

295
keyboards/mint60/serial.c
View File

@ -1,295 +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"
#ifdef USE_SERIAL
#define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
// Serial pulse period in microseconds.
#define SELECT_SERIAL_SPEED 1
#if SELECT_SERIAL_SPEED == 0
// Very High speed
#define SERIAL_DELAY 4 // micro sec
#define READ_WRITE_START_ADJUST 30 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#elif SELECT_SERIAL_SPEED == 1
// High speed
#define SERIAL_DELAY 6 // micro sec
#define READ_WRITE_START_ADJUST 23 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#elif SELECT_SERIAL_SPEED == 2
// Middle speed
#define SERIAL_DELAY 12 // micro sec
#define READ_WRITE_START_ADJUST 25 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#elif SELECT_SERIAL_SPEED == 3
// Low speed
#define SERIAL_DELAY 24 // micro sec
#define READ_WRITE_START_ADJUST 25 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#elif SELECT_SERIAL_SPEED == 4
// Very Low speed
#define SERIAL_DELAY 50 // micro sec
#define READ_WRITE_START_ADJUST 25 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#else
#error Illegal Serial Speed
#endif
#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
#define SLAVE_INT_WIDTH 1
#define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
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_delay_half1(void) {
_delay_us(SERIAL_DELAY_HALF1);
}
inline static
void serial_delay_half2(void) {
_delay_us(SERIAL_DELAY_HALF2);
}
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_with_pullup(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_with_pullup();
#if SERIAL_PIN_MASK == _BV(PD0)
// Enable INT0
EIMSK |= _BV(INT0);
// Trigger on falling edge of INT0
EICRA &= ~(_BV(ISC00) | _BV(ISC01));
#elif SERIAL_PIN_MASK == _BV(PD2)
// Enable INT2
EIMSK |= _BV(INT2);
// Trigger on falling edge of INT2
EICRA &= ~(_BV(ISC20) | _BV(ISC21));
#else
#error unknown SERIAL_PIN_MASK value
#endif
}
// Used by the sender to synchronize timing with the reciver.
static
void sync_recv(void) {
for (int i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
}
// 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());
}
// Used by the reciver to send a synchronization signal to the sender.
static
void sync_send(void) {
serial_low();
serial_delay();
serial_high();
}
// Reads a byte from the serial line
static
uint8_t serial_read_byte(void) {
uint8_t byte = 0;
_delay_sub_us(READ_WRITE_START_ADJUST);
for ( uint8_t i = 0; i < 8; ++i) {
serial_delay_half1(); // read the middle of pulses
byte = (byte << 1) | serial_read_pin();
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
serial_delay_half2();
}
return byte;
}
// Sends a byte with MSB ordering
static
void serial_write_byte(uint8_t data) {
uint8_t b = 1<<7;
while( b ) {
if(data & b) {
serial_high();
} else {
serial_low();
}
b >>= 1;
serial_delay();
}
serial_low(); // sync_send() / senc_recv() need raise edge
}
// interrupt handle to be used by the slave device
ISR(SERIAL_PIN_INTERRUPT) {
serial_output();
// slave send phase
uint8_t checksum = 0;
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
sync_send();
serial_write_byte(serial_slave_buffer[i]);
checksum += serial_slave_buffer[i];
}
sync_send();
serial_write_byte(checksum);
// slave switch to input
sync_send(); //0
serial_delay_half1(); //1
serial_low(); //2
serial_input_with_pullup(); //2
serial_delay_half1(); //3
// slave recive phase
uint8_t checksum_computed = 0;
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
sync_recv();
serial_master_buffer[i] = serial_read_byte();
checksum_computed += serial_master_buffer[i];
}
sync_recv();
uint8_t checksum_received = serial_read_byte();
if ( checksum_computed != checksum_received ) {
status |= SLAVE_DATA_CORRUPT;
} else {
status &= ~SLAVE_DATA_CORRUPT;
}
sync_recv(); //weit master output to high
}
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
// 2 => checksum error
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(SLAVE_INT_WIDTH);
// wait for the slaves response
serial_input_with_pullup();
_delay_us(SLAVE_INT_RESPONSE_TIME);
// check if the slave is present
if (serial_read_pin()) {
// slave failed to pull the line low, assume not present
serial_output();
serial_high();
sei();
return 1;
}
// master recive phase
// if the slave is present syncronize with it
uint8_t checksum_computed = 0;
// receive data from the slave
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
sync_recv();
serial_slave_buffer[i] = serial_read_byte();
checksum_computed += serial_slave_buffer[i];
}
sync_recv();
uint8_t checksum_received = serial_read_byte();
if (checksum_computed != checksum_received) {
serial_output();
serial_high();
sei();
return 2;
}
// master switch to output
sync_recv(); //0
serial_delay(); //1
serial_low(); //3
serial_output(); // 3
serial_delay_half1(); //4
// master send phase
uint8_t checksum = 0;
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
sync_send();
serial_write_byte(serial_master_buffer[i]);
checksum += serial_master_buffer[i];
}
sync_send();
serial_write_byte(checksum);
// always, release the line when not in use
sync_send();
sei();
return 0;
}
#endif

27
keyboards/mint60/serial.h
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@ -1,27 +0,0 @@
#ifndef SOFT_SERIAL_H
#define SOFT_SERIAL_H
#include <stdbool.h>
// ////////////////////////////////////////////
// Need Soft Serial defines in serial_config.h
// ////////////////////////////////////////////
// ex.
// #define SERIAL_PIN_DDR DDRD
// #define SERIAL_PIN_PORT PORTD
// #define SERIAL_PIN_INPUT PIND
// #define SERIAL_PIN_MASK _BV(PD?) ?=0,2
// #define SERIAL_PIN_INTERRUPT INT?_vect ?=0,2
// #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
// #define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
// 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 /* SOFT_SERIAL_H */

16
keyboards/mint60/serial_config.h
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@ -1,16 +0,0 @@
#ifndef SOFT_SERIAL_CONFIG_H
#define SOFT_SERIAL_CONFIG_H
/* Soft Serial defines */
#define SERIAL_PIN_DDR DDRD
#define SERIAL_PIN_PORT PORTD
#define SERIAL_PIN_INPUT PIND
#define SERIAL_PIN_MASK _BV(PD2)
#define SERIAL_PIN_INTERRUPT INT2_vect
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
//// #error rev2 serial config
#endif /* SOFT_SERIAL_CONFIG_H */

70
keyboards/mint60/split_util.c
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#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"
#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();
#else
serial_master_init();
#endif
}
static void keyboard_slave_setup(void) {
#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();
}
// this code runs before the usb and keyboard is initialized
void matrix_setup(void) {
split_keyboard_setup();
}

19
keyboards/mint60/split_util.h
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#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 matrix_master_OLED_init (void);
#endif