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105 lines
2.7 KiB
105 lines
2.7 KiB
#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include "hal.h"
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#include "timer.h"
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#include "wait.h"
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#include "printf.h"
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#include "backlight.h"
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#include "matrix.h"
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/* Clueboard4
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*
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* Column pins are input with internal pull-down.
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* Row pins are output and strobe with high.
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* Key is high or 1 when it turns on.
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*
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* col: { PA5, PA4, PB6, PB3 }
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* row: { PA7 }
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*/
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static bool debouncing = false;
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static uint16_t debouncing_time = 0;
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void matrix_init(void) {
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printf("matrix init\n");
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//debug_matrix = true;
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/* Column(sense) */
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palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOB, 6, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOB, 3, PAL_MODE_INPUT_PULLDOWN);
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/* Row(strobe) */
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palSetPadMode(GPIOA, 7, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPad(GPIOA, 7); // Only one row, so leave it in strobe state all the time.
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// I did it this way so hardware hackers would have another
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// pin to play with.
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memset(matrix, 0, MATRIX_ROWS);
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memset(matrix_debouncing, 0, MATRIX_ROWS);
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/* Setup the backlight */
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palSetPadMode(GPIOA, 6, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOA, 3, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOA, 15, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 5, PAL_MODE_OUTPUT_PUSHPULL);
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// Set them high to turn off the LEDs
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palClearPad(GPIOA, 6);
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palSetPad(GPIOA, 3);
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palSetPad(GPIOA, 15);
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palSetPad(GPIOB, 5);
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}
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uint8_t matrix_scan(void) {
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matrix_row_t data = 0;
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// read col data: { PA5, PA4, PB6, PB3 }
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data = (palReadPad(GPIOA, 5) |
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(palReadPad(GPIOA, 4) << 1) |
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(palReadPad(GPIOB, 6) << 2) |
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(palReadPad(GPIOB, 3) << 3));
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if (matrix_debouncing[0] != data) {
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matrix_debouncing[0] = data;
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debouncing = true;
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debouncing_time = timer_read();
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}
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if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
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matrix[0] = matrix_debouncing[0];
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debouncing = false;
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}
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return 1;
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}
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bool matrix_is_on(uint8_t row, uint8_t col) {
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return (matrix[row] & (1<<col));
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}
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matrix_row_t matrix_get_row(uint8_t row) {
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return matrix[row];
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}
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void matrix_print(void) {
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printf("\nr/c 01234567\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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printf("%X0: ", row);
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matrix_row_t data = matrix_get_row(row);
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for (int col = 0; col < MATRIX_COLS; col++) {
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if (data & (1<<col))
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printf("1");
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else
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printf("0");
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}
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printf("\n");
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}
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}
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