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#include "matrix.h"
#include <string.h>
#include "timer.h"
#include "wait.h"
#include "debug.h"
#include "i2c_master.h"
#include "ergodox_stm32.h"
#ifndef DEBOUNCE
#define DEBOUNCE 10
#endif
static uint8_t mcp23017_reset_loop = 0;
volatile matrix_row_t matrix[MATRIX_ROWS];
volatile matrix_row_t raw_matrix[MATRIX_ROWS];
volatile uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
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 void init_rows(void);
__attribute__((weak)) void matrix_init_user(void) {}
__attribute__((weak)) void matrix_scan_user(void) {}
__attribute__((weak)) void matrix_init_kb(void) {
matrix_init_user();
}
__attribute__((weak)) void matrix_scan_kb(void) {
matrix_scan_user();
}
void matrix_init(void) {
mcp23017_status = init_mcp23017();
(void) mcp23017_reset_loop;
init_rows();
unselect_rows();
init_cols();
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
raw_matrix[i] = 0;
for (uint8_t j = 0; j < MATRIX_COLS; ++j) {
debounce_matrix[i * MATRIX_COLS + j] = 0;
}
}
matrix_init_kb();
}
void matrix_power_up(void) {
mcp23017_status = init_mcp23017();
init_rows();
unselect_rows();
init_cols();
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
}
}
matrix_row_t debounce_mask(matrix_row_t rawcols, uint8_t row) {
matrix_row_t result = 0;
matrix_row_t change = rawcols ^raw_matrix[row];
raw_matrix[row] = rawcols;
for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
if (debounce_matrix[row * MATRIX_COLS + i]) {
--debounce_matrix[row * MATRIX_COLS + i];
} else {
result |= (1 << i);
}
if (change & (1 << i)) {
debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
}
}
return result;
}
matrix_row_t debounce_read_cols(uint8_t row) {
// Read the row without debouncing filtering and store it for later usage.
matrix_row_t cols = read_cols(row);
// Get the Debounce mask.
matrix_row_t mask = debounce_mask(cols, row);
// debounce the row and return the result.
return (cols & mask) | (matrix[row] & ~mask);;
}
uint8_t matrix_scan(void) {
if (mcp23017_status) {
if (++mcp23017_reset_loop == 0) {
mcp23017_status = init_mcp23017();
if (!mcp23017_status) {
ergodox_blink_all_leds();
}
}
}
for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
select_row(i);
select_row(i + MATRIX_ROWS_PER_SIDE);
matrix[i] = debounce_read_cols(i);
matrix[i + MATRIX_ROWS_PER_SIDE] = debounce_read_cols(i + MATRIX_ROWS_PER_SIDE);
unselect_rows();
}
matrix_scan_kb();
return 0;
}
inline
bool matrix_is_on(uint8_t row, uint8_t col) {
return (matrix[row] & (1 << col));
}
inline
matrix_row_t matrix_get_row(uint8_t row) {
return matrix[row];
}
void matrix_print(void) {
}
static matrix_row_t read_cols(uint8_t row) {
if (row < MATRIX_ROWS_PER_SIDE) {
uint8_t data = 0xFF;
if (!mcp23017_status) {
uint8_t regAddr = I2C_GPIOB;
mcp23017_status = i2c_read_register(I2C_ADDR, regAddr, &data, 1, 10);
}
if (mcp23017_status) {
return 0;
}
return (~data) & 0x3F;
} else {
uint8_t data_p = (GPIOB -> IDR);
uint8_t data = data_p;
return ((~data) & 0x3f);
}
}
static void init_cols(void) {
palSetPadMode(GPIOB, 0, PAL_MODE_INPUT_PULLUP);
palSetPadMode(GPIOB, 1, PAL_MODE_INPUT_PULLUP);
palSetPadMode(GPIOB, 2, PAL_MODE_INPUT_PULLUP);
palSetPadMode(GPIOB, 3, PAL_MODE_INPUT_PULLUP);
palSetPadMode(GPIOB, 4, PAL_MODE_INPUT_PULLUP);
palSetPadMode(GPIOB, 5, PAL_MODE_INPUT_PULLUP);
}
static void init_rows(void) {
palSetPadMode(GPIOB, 8, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 9, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 10, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 11, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 12, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 13, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 14, PAL_MODE_OUTPUT_PUSHPULL);
}
static void unselect_rows(void) {
GPIOB->BSRR = 0b1111111 << 8;
}
static void select_row(uint8_t row) {
if (row < MATRIX_ROWS_PER_SIDE) {
if (!mcp23017_status) {
uint8_t data = (0xFF & ~(1 << row));
mcp23017_status = i2c_write_register(I2C_ADDR, I2C_GPIOA, &data, 1, 10);
}
} else {
GPIOB->BRR = 0x1 << (row+1);
}
}
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