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/**
* matrix.c
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "hal.h"
#include "quantum.h"
#include "timer.h"
#include "wait.h"
#include "printf.h"
#include "matrix.h"
/**
*
* Row pins are input with internal pull-down.
* Column pins are output and strobe with high.
* Key is high or 1 when it turns on.
*
*/
/* 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;
void matrix_init(void)
{
//debug_enable = true;
palSetLineMode(LINE_COL_1, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_2, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_3, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_4, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_5, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_6, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_7, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_8, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_9, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_10, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_11, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_12, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_13, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_14, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_COL_15, PAL_MODE_OUTPUT_PUSHPULL);
palSetLineMode(LINE_ROW_1, PAL_MODE_INPUT_PULLDOWN);
palSetLineMode(LINE_ROW_2, PAL_MODE_INPUT_PULLDOWN);
palSetLineMode(LINE_ROW_3, PAL_MODE_INPUT_PULLDOWN);
palSetLineMode(LINE_ROW_4, PAL_MODE_INPUT_PULLDOWN);
palSetLineMode(LINE_ROW_5, PAL_MODE_INPUT_PULLDOWN);
palClearLine(LINE_COL_1);
palClearLine(LINE_COL_2);
palClearLine(LINE_COL_3);
palClearLine(LINE_COL_4);
palClearLine(LINE_COL_5);
palClearLine(LINE_COL_6);
palClearLine(LINE_COL_7);
palClearLine(LINE_COL_8);
palClearLine(LINE_COL_9);
palClearLine(LINE_COL_10);
palClearLine(LINE_COL_11);
palClearLine(LINE_COL_12);
palClearLine(LINE_COL_13);
palClearLine(LINE_COL_14);
palClearLine(LINE_COL_15);
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)
{
for (int col = 0; col < MATRIX_COLS; col++) {
matrix_row_t data = 0;
switch (col) {
case 0: palSetLine(LINE_COL_1); break;
case 1: palSetLine(LINE_COL_2); break;
case 2: palSetLine(LINE_COL_3); break;
case 3: palSetLine(LINE_COL_4); break;
case 4: palSetLine(LINE_COL_5); break;
case 5: palSetLine(LINE_COL_6); break;
case 6: palSetLine(LINE_COL_7); break;
case 7: palSetLine(LINE_COL_8); break;
case 8: palSetLine(LINE_COL_9); break;
case 9: palSetLine(LINE_COL_10); break;
case 10: palSetLine(LINE_COL_11); break;
case 11: palSetLine(LINE_COL_12); break;
case 12: palSetLine(LINE_COL_13); break;
case 13: palSetLine(LINE_COL_14); break;
case 14: palSetLine(LINE_COL_15); break;
}
// need wait to settle pin state
wait_us(20);
data = (
(palReadLine(LINE_ROW_1) << 0 ) |
(palReadLine(LINE_ROW_2) << 1 ) |
(palReadLine(LINE_ROW_3) << 2 ) |
(palReadLine(LINE_ROW_4) << 3 ) |
(palReadLine(LINE_ROW_5) << 4 )
);
switch (col) {
case 0: palClearLine(LINE_COL_1); break;
case 1: palClearLine(LINE_COL_2); break;
case 2: palClearLine(LINE_COL_3); break;
case 3: palClearLine(LINE_COL_4); break;
case 4: palClearLine(LINE_COL_5); break;
case 5: palClearLine(LINE_COL_6); break;
case 6: palClearLine(LINE_COL_7); break;
case 7: palClearLine(LINE_COL_8); break;
case 8: palClearLine(LINE_COL_9); break;
case 9: palClearLine(LINE_COL_10); break;
case 10: palClearLine(LINE_COL_11); break;
case 11: palClearLine(LINE_COL_12); break;
case 12: palClearLine(LINE_COL_13); break;
case 13: palClearLine(LINE_COL_14); break;
case 14: palClearLine(LINE_COL_15); break;
}
if (matrix_debouncing[col] != data) {
matrix_debouncing[col] = data;
debouncing = true;
debouncing_time = timer_read();
}
}
if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCING_DELAY) {
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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