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: { PTD0, PTD1, PTD4, PTD5, PTD6, PTD7, PTC1, PTC2 }
17 * row: { PTB2, PTB3, PTB18, PTB19, PTC0, PTC8, PTC9, PTC10, PTC11 }
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)
28 //debug_matrix = true;
30 palSetPadMode(GPIOD, 0, PAL_MODE_INPUT_PULLDOWN);
31 palSetPadMode(GPIOD, 1, 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);
36 palSetPadMode(GPIOC, 1, PAL_MODE_INPUT_PULLDOWN);
37 palSetPadMode(GPIOC, 2, PAL_MODE_INPUT_PULLDOWN);
40 palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
41 palSetPadMode(GPIOB, 3, PAL_MODE_OUTPUT_PUSHPULL);
42 palSetPadMode(GPIOB, 18, PAL_MODE_OUTPUT_PUSHPULL);
43 palSetPadMode(GPIOB, 19, PAL_MODE_OUTPUT_PUSHPULL);
44 palSetPadMode(GPIOC, 0, PAL_MODE_OUTPUT_PUSHPULL);
45 palSetPadMode(GPIOC, 8, PAL_MODE_OUTPUT_PUSHPULL);
46 palSetPadMode(GPIOC, 9, PAL_MODE_OUTPUT_PUSHPULL);
47 palSetPadMode(GPIOC, 10, PAL_MODE_OUTPUT_PUSHPULL);
48 palSetPadMode(GPIOC, 11, PAL_MODE_OUTPUT_PUSHPULL);
50 memset(matrix, 0, MATRIX_ROWS * sizeof(matrix_row_t));
51 memset(matrix_debouncing, 0, MATRIX_ROWS * sizeof(matrix_row_t));
53 matrix_init_quantum();
56 uint8_t matrix_scan(void)
58 for (int row = 0; row < MATRIX_ROWS; row++) {
59 matrix_row_t data = 0;
63 case 0: palSetPad(GPIOB, 2); break;
64 case 1: palSetPad(GPIOB, 3); break;
65 case 2: palSetPad(GPIOB, 18); break;
66 case 3: palSetPad(GPIOB, 19); break;
67 case 4: palSetPad(GPIOC, 0); break;
68 case 5: palSetPad(GPIOC, 8); break;
69 case 6: palSetPad(GPIOC, 9); break;
70 case 7: palSetPad(GPIOC, 10); break;
71 case 8: palSetPad(GPIOC, 11); break;
74 wait_us(20); // need wait to settle pin state
76 // read col data: { PTD0, PTD1, PTD4, PTD5, PTD6, PTD7, PTC1, PTC2 }
77 data = ((palReadPort(GPIOC) & 0x06UL) << 5) |
78 ((palReadPort(GPIOD) & 0xF0UL) >> 2) |
79 (palReadPort(GPIOD) & 0x03UL);
83 case 0: palClearPad(GPIOB, 2); break;
84 case 1: palClearPad(GPIOB, 3); break;
85 case 2: palClearPad(GPIOB, 18); break;
86 case 3: palClearPad(GPIOB, 19); break;
87 case 4: palClearPad(GPIOC, 0); break;
88 case 5: palClearPad(GPIOC, 8); break;
89 case 6: palClearPad(GPIOC, 9); break;
90 case 7: palClearPad(GPIOC, 10); break;
91 case 8: palClearPad(GPIOC, 11); break;
94 if (matrix_debouncing[row] != data) {
95 matrix_debouncing[row] = data;
97 debouncing_time = timer_read();
101 if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
102 for (int row = 0; row < MATRIX_ROWS; row++) {
103 matrix[row] = matrix_debouncing[row];
107 matrix_scan_quantum();
111 bool matrix_is_on(uint8_t row, uint8_t col)
113 return (matrix[row] & (1<<col));
116 matrix_row_t matrix_get_row(uint8_t row)
121 void matrix_print(void)
123 xprintf("\nr/c 01234567\n");
124 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
125 xprintf("%X0: ", row);
126 matrix_row_t data = matrix_get_row(row);
127 for (int col = 0; col < MATRIX_COLS; col++) {