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170 lines
5.4 KiB
170 lines
5.4 KiB
/*
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* Copyright 2018 Jack Humbert <jack.humb@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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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 "debug.h"
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#include "matrix.h"
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typedef uint16_t matrix_col_t;
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/*
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* col: { B11, B10, B2, B1, A7, B0 }
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* row: { A10, A9, A8, B15, C13, C14, C15, A2 }
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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_col_t matrix_debouncing[MATRIX_COLS];
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static bool debouncing = false;
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static uint16_t debouncing_time = 0;
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__attribute__((weak)) void matrix_init_user(void) {}
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__attribute__((weak)) void matrix_scan_user(void) {}
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__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
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__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
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void matrix_init(void) {
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dprintf("matrix init\n");
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// debug_matrix = true;
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// actual matrix setup
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palSetPadMode(GPIOB, 11, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 10, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 1, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOA, 7, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOB, 0, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOA, 10, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOA, 9, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOA, 8, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOB, 15, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOC, 13, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOC, 14, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOC, 15, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOA, 2, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOA, 3, PAL_MODE_INPUT_PULLDOWN);
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palSetPadMode(GPIOA, 6, PAL_MODE_INPUT_PULLDOWN);
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memset(matrix, 0, MATRIX_ROWS * sizeof(matrix_row_t));
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memset(matrix_debouncing, 0, MATRIX_COLS * sizeof(matrix_col_t));
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matrix_init_quantum();
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}
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uint8_t matrix_scan(void) {
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// actual matrix
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for (int col = 0; col < MATRIX_COLS; col++) {
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matrix_col_t data = 0;
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// strobe col { B11, B10, B2, B1, A7, B0 }
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switch (col) {
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case 0:
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palSetPad(GPIOB, 11);
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break;
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case 1:
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palSetPad(GPIOB, 10);
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break;
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case 2:
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palSetPad(GPIOB, 2);
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break;
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case 3:
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palSetPad(GPIOB, 1);
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break;
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case 4:
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palSetPad(GPIOA, 7);
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break;
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case 5:
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palSetPad(GPIOB, 0);
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break;
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}
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// need wait to settle pin state
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wait_us(20);
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// read row data { A10, A9, A8, B15, C13, C14, C15, A2 }
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data = ((palReadPad(GPIOA, 10) << 0) | (palReadPad(GPIOA, 9) << 1) | (palReadPad(GPIOA, 8) << 2) | (palReadPad(GPIOB, 15) << 3) | (palReadPad(GPIOC, 13) << 4) | (palReadPad(GPIOC, 14) << 5) | (palReadPad(GPIOC, 15) << 6) | (palReadPad(GPIOA, 2) << 7) | (palReadPad(GPIOA, 3) << 8) | (palReadPad(GPIOA, 6) << 9));
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// unstrobe col { B11, B10, B2, B1, A7, B0 }
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switch (col) {
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case 0:
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palClearPad(GPIOB, 11);
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break;
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case 1:
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palClearPad(GPIOB, 10);
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break;
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case 2:
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palClearPad(GPIOB, 2);
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break;
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case 3:
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palClearPad(GPIOB, 1);
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break;
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case 4:
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palClearPad(GPIOA, 7);
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break;
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case 5:
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palClearPad(GPIOB, 0);
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break;
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}
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if (matrix_debouncing[col] != data) {
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matrix_debouncing[col] = 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] = 0;
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for (int col = 0; col < MATRIX_COLS; col++) {
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matrix[row] |= ((matrix_debouncing[col] & (1 << row) ? 1 : 0) << col);
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}
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}
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debouncing = false;
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}
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matrix_scan_quantum();
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return 1;
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}
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bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & (1 << col)); }
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matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
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void matrix_print(void) {
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dprintf("\nr/c 01234567\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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dprintf("%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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dprintf("1");
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else
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dprintf("0");
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}
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dprintf("\n");
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}
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}
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