13 * Column pins are input with internal pull-down. Row pins are output and strobe with high.
14 * Key is high or 1 when it turns on.
16 * col: { PTD1, PTD2, PTD3, PTD4, PTD5, PTD6, PTD7 }
17 * row: { PTB0, PTB1, PTB2, PTB3, PTB16, PTB17, PTC4, PTC5, PTD0 }
19 /* matrix state(1:on, 0:off) */
20 static matrix_row_t matrix[MATRIX_ROWS];
21 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
22 static bool debouncing = false;
23 static uint16_t debouncing_time = 0;
26 void matrix_init(void)
29 palSetPadMode(GPIOD, 1, PAL_MODE_INPUT_PULLDOWN);
30 palSetPadMode(GPIOD, 2, PAL_MODE_INPUT_PULLDOWN);
31 palSetPadMode(GPIOD, 3, PAL_MODE_INPUT_PULLDOWN);
32 palSetPadMode(GPIOD, 4, PAL_MODE_INPUT_PULLDOWN);
33 palSetPadMode(GPIOD, 5, PAL_MODE_INPUT_PULLDOWN);
34 palSetPadMode(GPIOD, 6, PAL_MODE_INPUT_PULLDOWN);
35 palSetPadMode(GPIOD, 7, PAL_MODE_INPUT_PULLDOWN);
38 palSetPadMode(GPIOB, 0, PAL_MODE_OUTPUT_PUSHPULL);
39 palSetPadMode(GPIOB, 1, PAL_MODE_OUTPUT_PUSHPULL);
40 palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
41 palSetPadMode(GPIOB, 3, PAL_MODE_OUTPUT_PUSHPULL);
42 palSetPadMode(GPIOB, 16, PAL_MODE_OUTPUT_PUSHPULL);
43 palSetPadMode(GPIOB, 17, PAL_MODE_OUTPUT_PUSHPULL);
44 palSetPadMode(GPIOC, 4, PAL_MODE_OUTPUT_PUSHPULL);
45 palSetPadMode(GPIOC, 5, PAL_MODE_OUTPUT_PUSHPULL);
46 palSetPadMode(GPIOD, 0, PAL_MODE_OUTPUT_PUSHPULL);
48 memset(matrix, 0, MATRIX_ROWS);
49 memset(matrix_debouncing, 0, MATRIX_ROWS);
52 uint8_t matrix_scan(void)
54 for (int row = 0; row < MATRIX_ROWS; row++) {
55 matrix_row_t data = 0;
59 case 0: palSetPad(GPIOB, 0); break;
60 case 1: palSetPad(GPIOB, 1); break;
61 case 2: palSetPad(GPIOB, 2); break;
62 case 3: palSetPad(GPIOB, 3); break;
63 case 4: palSetPad(GPIOB, 16); break;
64 case 5: palSetPad(GPIOB, 17); break;
65 case 6: palSetPad(GPIOC, 4); break;
66 case 7: palSetPad(GPIOC, 5); break;
67 case 8: palSetPad(GPIOD, 0); break;
70 wait_us(1); // need wait to settle pin state
73 data = (palReadPort(GPIOD)>>1);
77 case 0: palClearPad(GPIOB, 0); break;
78 case 1: palClearPad(GPIOB, 1); break;
79 case 2: palClearPad(GPIOB, 2); break;
80 case 3: palClearPad(GPIOB, 3); break;
81 case 4: palClearPad(GPIOB, 16); break;
82 case 5: palClearPad(GPIOB, 17); break;
83 case 6: palClearPad(GPIOC, 4); break;
84 case 7: palClearPad(GPIOC, 5); break;
85 case 8: palClearPad(GPIOD, 0); break;
88 if (matrix_debouncing[row] != data) {
89 matrix_debouncing[row] = data;
91 debouncing_time = timer_read();
95 if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
96 for (int row = 0; row < MATRIX_ROWS; row++) {
97 matrix[row] = matrix_debouncing[row];
104 bool matrix_is_on(uint8_t row, uint8_t col)
106 return (matrix[row] & (1<<col));
109 matrix_row_t matrix_get_row(uint8_t row)
114 void matrix_print(void)
116 xprintf("\nr/c 01234567\n");
117 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
119 matrix_row_t data = matrix_get_row(row);
120 for (int col = 0; col < MATRIX_COLS; col++) {