129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
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#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 "print.h"
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#include "matrix.h"
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/*
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* Infinity Pinusage:
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* Column pins are input with internal pull-down. 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: { PTD1, PTD2, PTD3, PTD4, PTD5, PTD6, PTD7 }
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* row: { PTB0, PTB1, PTB2, PTB3, PTB16, PTB17, PTC4, PTC5, PTD0 }
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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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{
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/* Column(sense) */
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palSetPadMode(GPIOD, 1, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOD, 2, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOD, 3, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOD, 4, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOD, 5, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOD, 6, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOD, 7, PAL_MODE_INPUT_PULLDOWN);
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/* Row(strobe) */
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palSetPadMode(GPIOB, 0, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 1, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 3, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 16, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 17, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOC, 4, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOC, 5, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 0, PAL_MODE_OUTPUT_PUSHPULL);
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memset(matrix, 0, MATRIX_ROWS);
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memset(matrix_debouncing, 0, MATRIX_ROWS);
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}
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uint8_t matrix_scan(void)
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{
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for (int row = 0; row < MATRIX_ROWS; row++) {
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matrix_row_t data = 0;
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// strobe row
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switch (row) {
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case 0: palSetPad(GPIOB, 0); break;
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case 1: palSetPad(GPIOB, 1); break;
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case 2: palSetPad(GPIOB, 2); break;
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case 3: palSetPad(GPIOB, 3); break;
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case 4: palSetPad(GPIOB, 16); break;
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case 5: palSetPad(GPIOB, 17); break;
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case 6: palSetPad(GPIOC, 4); break;
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case 7: palSetPad(GPIOC, 5); break;
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case 8: palSetPad(GPIOD, 0); break;
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}
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wait_us(1); // need wait to settle pin state
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// read col data
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data = (palReadPort(GPIOD)>>1);
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// un-strobe row
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switch (row) {
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case 0: palClearPad(GPIOB, 0); break;
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case 1: palClearPad(GPIOB, 1); break;
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case 2: palClearPad(GPIOB, 2); break;
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case 3: palClearPad(GPIOB, 3); break;
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case 4: palClearPad(GPIOB, 16); break;
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case 5: palClearPad(GPIOB, 17); break;
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case 6: palClearPad(GPIOC, 4); break;
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case 7: palClearPad(GPIOC, 5); break;
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case 8: palClearPad(GPIOD, 0); break;
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}
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if (matrix_debouncing[row] != data) {
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matrix_debouncing[row] = data;
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debouncing = true;
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debouncing_time = timer_read();
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}
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}
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if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
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for (int row = 0; row < MATRIX_ROWS; row++) {
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matrix[row] = matrix_debouncing[row];
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}
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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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{
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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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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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xprintf("\nr/c 01234567\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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xprintf("%02X: ");
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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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xprintf("1");
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else
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xprintf("0");
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}
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xprintf("\n");
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}
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}
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