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diff --git a/keyboards/3w6/rev2/matrix.c b/keyboards/3w6/rev2/matrix.c
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-/*
-Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
- 2020 Pierre Chevalier <pierrechevalier83@gmail.com>
- 2021 weteor
-
-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/>.
-*/
-
-/*
- * This code was heavily inspired by the ergodox_ez keymap, and modernized
- * to take advantage of the quantum.h microcontroller agnostics gpio control
- * abstractions and use the macros defined in config.h for the wiring as opposed
- * to repeating that information all over the place.
- */
-
-#include QMK_KEYBOARD_H
-#include "i2c_master.h"
-
-extern i2c_status_t tca9555_status;
-#define I2C_TIMEOUT 1000
-
-// I2C address:
-// All address pins of the tca9555 are connected to the ground
-// | 0 | 1 | 0 | 0 | A2 | A1 | A0 |
-// | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
-#define I2C_ADDR (0b0100000 << 1)
-
-// Register addresses
-#define IODIRA 0x06 // i/o direction register
-#define IODIRB 0x07
-#define IREGP0 0x00 // GPIO pull-up resistor register
-#define IREGP1 0x01
-#define OREGP0 0x02 // general purpose i/o port register (write modifies OLAT)
-#define OREGP1 0x03
-
-bool i2c_initialized = 0;
-i2c_status_t tca9555_status = I2C_ADDR;
-
-uint8_t init_tca9555(void) {
- print("starting init");
- tca9555_status = I2C_ADDR;
-
- // I2C subsystem
- if (i2c_initialized == 0) {
- i2c_init(); // on pins D(1,0)
- i2c_initialized = true;
- wait_ms(I2C_TIMEOUT);
- }
-
- // set pin direction
- // - unused : input : 1
- // - input : input : 1
- // - driving : output : 0
- uint8_t conf[2] = {
- // This means: read all pins of port 0
- 0b11111111,
- // This means: we will write on pins 0 to 3 on port 1. read rest
- 0b11110000,
- };
- tca9555_status = i2c_writeReg(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
-
- return tca9555_status;
-}
-
-/* matrix state(1:on, 0:off) */
-static matrix_row_t matrix[MATRIX_ROWS]; // debounced values
-
-static matrix_row_t read_cols(uint8_t row);
-static void init_cols(void);
-static void unselect_rows(void);
-static void select_row(uint8_t row);
-
-static uint8_t tca9555_reset_loop;
-
-void matrix_init_custom(void) {
- // initialize row and col
-
- tca9555_status = init_tca9555();
-
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- }
-}
-
-void matrix_power_up(void) {
- tca9555_status = init_tca9555();
-
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- }
-}
-
-// Reads and stores a row, returning
-// whether a change occurred.
-static inline bool store_matrix_row(matrix_row_t current_matrix[], uint8_t index) {
- matrix_row_t temp = read_cols(index);
- if (current_matrix[index] != temp) {
- current_matrix[index] = temp;
- return true;
- }
- return false;
-}
-
-bool matrix_scan_custom(matrix_row_t current_matrix[]) {
- if (tca9555_status) { // if there was an error
- if (++tca9555_reset_loop == 0) {
- // since tca9555_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
- // this will be approx bit more frequent than once per second
- dprint("trying to reset tca9555\n");
- tca9555_status = init_tca9555();
- if (tca9555_status) {
- dprint("right side not responding\n");
- } else {
- dprint("right side attached\n");
- }
- }
- }
-
- bool changed = false;
- for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
- // select rows from left and right hands
- uint8_t left_index = i;
- uint8_t right_index = i + MATRIX_ROWS_PER_SIDE;
- select_row(left_index);
- select_row(right_index);
-
- // we don't need a 30us delay anymore, because selecting a
- // left-hand row requires more than 30us for i2c.
-
- changed |= store_matrix_row(current_matrix, left_index);
- changed |= store_matrix_row(current_matrix, right_index);
-
- unselect_rows();
- }
-
- return changed;
-}
-
-static void init_cols(void) {
- // init on tca9555
- // not needed, already done as part of init_tca9555()
-
- // init on mcu
- pin_t matrix_col_pins_mcu[MATRIX_COLS_PER_SIDE] = MATRIX_COL_PINS_L;
- for (int pin_index = 0; pin_index < MATRIX_COLS_PER_SIDE; pin_index++) {
- pin_t pin = matrix_col_pins_mcu[pin_index];
- setPinInput(pin);
- writePinHigh(pin);
- }
-}
-
-static matrix_row_t read_cols(uint8_t row) {
- if (row < MATRIX_ROWS_PER_SIDE) {
- pin_t matrix_col_pins_mcu[MATRIX_COLS_PER_SIDE] = MATRIX_COL_PINS_L;
- matrix_row_t current_row_value = 0;
- // For each col...
- for (uint8_t col_index = 0; col_index < MATRIX_COLS_PER_SIDE; col_index++) {
- // Select the col pin to read (active low)
- uint8_t pin_state = readPin(matrix_col_pins_mcu[col_index]);
-
- // Populate the matrix row with the state of the col pin
- current_row_value |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
- }
- return current_row_value;
- } else {
- if (tca9555_status) { // if there was an error
- return 0;
- } else {
- uint8_t data = 0;
- uint8_t port0 = 0;
- tca9555_status = i2c_readReg(I2C_ADDR, IREGP0, &port0, 1, I2C_TIMEOUT);
- if (tca9555_status) { // if there was an error
- // do nothing
- return 0;
- } else {
- port0 = ~port0;
- // We read all the pins on GPIOA.
- // The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
- // The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
- // the pins connected to eact columns are sequential, but in reverse order, and counting from zero down (col 5 -> GPIO04, col6 -> GPIO03 and so on).
- data |= (port0 & 0x01) << 4;
- data |= (port0 & 0x02) << 2;
- data |= (port0 & 0x04);
- data |= (port0 & 0x08) >> 2;
- data |= (port0 & 0x10) >> 4;
-
- tca9555_status = I2C_STATUS_SUCCESS;
- return data;
- }
- }
- }
-}
-
-static void unselect_rows(void) {
- // no need to unselect on tca9555, because the select step sets all
- // the other row bits high, and it's not changing to a different
- // direction
-
- // unselect rows on microcontroller
- pin_t matrix_row_pins_mcu[MATRIX_ROWS_PER_SIDE] = MATRIX_ROW_PINS_L;
- for (int pin_index = 0; pin_index < MATRIX_ROWS_PER_SIDE; pin_index++) {
- pin_t pin = matrix_row_pins_mcu[pin_index];
- setPinInput(pin);
- writePinLow(pin);
- }
-}
-
-static void select_row(uint8_t row) {
- uint8_t port1 = 0xff;
-
- if (row < MATRIX_ROWS_PER_SIDE) {
- // select on atmega32u4
- pin_t matrix_row_pins_mcu[MATRIX_ROWS_PER_SIDE] = MATRIX_ROW_PINS_L;
- pin_t pin = matrix_row_pins_mcu[row];
- setPinOutput(pin);
- writePinLow(pin);
- } else {
- // select on tca9555
- if (tca9555_status) { // if there was an error
- // do nothing
- } else {
- switch(row) {
- case 4: port1 &= ~(1 << 0); break;
- case 5: port1 &= ~(1 << 1); break;
- case 6: port1 &= ~(1 << 2); break;
- case 7:
- port1 &= ~(1 << 3);
- break;
- default: break;
- }
-
- tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, &port1, 1, I2C_TIMEOUT);
- // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
- // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
- }
- }
-}
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