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/*
* Copyright 2018 Jack Humbert <jack.humb@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/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "hal.h"
#include "timer.h"
#include "wait.h"
#include "debug.h"
#include "matrix.h"
/*
* col: { B11, B10, B2, B1, A7, B0 }
* row: { A10, A9, A8, B15, C13, C14, C15, A2 }
*/
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_COLS];
static bool debouncing = false;
static uint16_t debouncing_time = 0;
__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) {
printf("matrix init\n");
// debug_matrix = true;
// actual matrix setup
palSetPadMode(GPIOB, 11, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 10, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 1, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOA, 7, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 0, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOA, 10, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOA, 9, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOA, 8, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOB, 15, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOC, 13, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOC, 14, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOC, 15, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOA, 2, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOA, 3, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOA, 6, PAL_MODE_INPUT_PULLDOWN);
memset(matrix, 0, MATRIX_ROWS * sizeof(matrix_row_t));
memset(matrix_debouncing, 0, MATRIX_COLS * sizeof(matrix_row_t));
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
// actual matrix
for (int col = 0; col < MATRIX_COLS; col++) {
matrix_row_t data = 0;
// strobe col { B11, B10, B2, B1, A7, B0 }
switch (col) {
case 0:
palSetPad(GPIOB, 11);
break;
case 1:
palSetPad(GPIOB, 10);
break;
case 2:
palSetPad(GPIOB, 2);
break;
case 3:
palSetPad(GPIOB, 1);
break;
case 4:
palSetPad(GPIOA, 7);
break;
case 5:
palSetPad(GPIOB, 0);
break;
}
// need wait to settle pin state
wait_us(20);
// read row data { A10, A9, A8, B15, C13, C14, C15, A2 }
data = ((palReadPad(GPIOA, 10) << 0) | (palReadPad(GPIOA, 9) << 1) | (palReadPad(GPIOA, 8) << 2) | (palReadPad(GPIOB, 15) << 3) | (palReadPad(GPIOC, 13) << 4) | (palReadPad(GPIOC, 14) << 5) | (palReadPad(GPIOC, 15) << 6) | (palReadPad(GPIOA, 2) << 7) | (palReadPad(GPIOA, 3) << 8) | (palReadPad(GPIOA, 6) << 9));
// unstrobe col { B11, B10, B2, B1, A7, B0 }
switch (col) {
case 0:
palClearPad(GPIOB, 11);
break;
case 1:
palClearPad(GPIOB, 10);
break;
case 2:
palClearPad(GPIOB, 2);
break;
case 3:
palClearPad(GPIOB, 1);
break;
case 4:
palClearPad(GPIOA, 7);
break;
case 5:
palClearPad(GPIOB, 0);
break;
}
if (matrix_debouncing[col] != data) {
matrix_debouncing[col] = data;
debouncing = true;
debouncing_time = timer_read();
}
}
if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
for (int row = 0; row < MATRIX_ROWS; row++) {
matrix[row] = 0;
for (int col = 0; col < MATRIX_COLS; col++) {
matrix[row] |= ((matrix_debouncing[col] & (1 << row) ? 1 : 0) << col);
}
}
debouncing = false;
}
matrix_scan_quantum();
return 1;
}
bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & (1 << col)); }
matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
void matrix_print(void) {
printf("\nr/c 01234567\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
printf("%X0: ", row);
matrix_row_t data = matrix_get_row(row);
for (int col = 0; col < MATRIX_COLS; col++) {
if (data & (1 << col))
printf("1");
else
printf("0");
}
printf("\n");
}
}
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