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-rw-r--r--keyboards/frosty_flake/matrix.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/keyboards/frosty_flake/matrix.c b/keyboards/frosty_flake/matrix.c
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+++ b/keyboards/frosty_flake/matrix.c
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+/*
+ Copyright 2017 Gabriel Young <gabeplaysdrums@live.com>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+
+#ifndef DEBOUNCING_DELAY
+# define DEBOUNCING_DELAY 5
+#endif
+static uint8_t debouncing = DEBOUNCING_DELAY;
+
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static matrix_row_t scan_col(void) {
+ return (
+ (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<0)) |
+ (PINB&(1<<5) ? 0 : ((matrix_row_t)1<<1)) |
+ (PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) |
+ (PINB&(1<<6) ? 0 : ((matrix_row_t)1<<3)) |
+ (PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) |
+ (PINB&(1<<2) ? 0 : ((matrix_row_t)1<<5)) |
+ (PINB&(1<<3) ? 0 : ((matrix_row_t)1<<6)) |
+ (PINB&(1<<0) ? 0 : ((matrix_row_t)1<<7))
+ );
+}
+
+static void select_col(uint8_t col) {
+ switch (col) {
+ case 0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break;
+ case 1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break;
+ case 2: PORTD = (PORTD & ~0b01111011) | 0b01101010; break;
+ case 3: PORTD = (PORTD & ~0b01111011) | 0b01111001; break;
+ case 4: PORTD = (PORTD & ~0b01111011) | 0b01100010; break;
+ case 5: PORTD = (PORTD & ~0b01111011) | 0b01110001; break;
+ case 6: PORTD = (PORTD & ~0b01111011) | 0b01100001; break;
+ case 7: PORTD = (PORTD & ~0b01111011) | 0b01110000; break;
+ case 8: PORTD = (PORTD & ~0b01111011) | 0b01100000; break;
+ case 9: PORTD = (PORTD & ~0b01111011) | 0b01101000; break;
+ case 10: PORTD = (PORTD & ~0b01111011) | 0b00101011; break;
+ case 11: PORTD = (PORTD & ~0b01111011) | 0b00110011; break;
+ case 12: PORTD = (PORTD & ~0b01111011) | 0b00100011; break;
+ case 13: PORTD = (PORTD & ~0b01111011) | 0b01111000; break;
+ case 14: PORTD = (PORTD & ~0b01111011) | 0b00010011; break;
+ case 15: PORTD = (PORTD & ~0b01111011) | 0b01101001; break;
+ case 16: PORTD = (PORTD & ~0b01111011) | 0b00001011; break;
+ case 17: PORTD = (PORTD & ~0b01111011) | 0b00111011; break;
+ }
+}
+
+void matrix_init(void) {
+ /* Row output pins */
+ DDRD |= 0b01111011;
+ /* Column input pins */
+ DDRC &= ~0b10000000;
+ DDRB &= ~0b01111111;
+ PORTC |= 0b10000000;
+ PORTB |= 0b01111111;
+
+ for (uint8_t i=0; i < MATRIX_ROWS; i++)
+ matrix[i] = matrix_debouncing[i] = 0;
+
+ matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ select_col(col);
+ _delay_us(3);
+ matrix_row_t col_scan = scan_col();
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
+ bool curr_bit = col_scan & (1<<row);
+ if (prev_bit != curr_bit) {
+ matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
+ debouncing = DEBOUNCING_DELAY;
+ }
+ }
+ }
+
+ if (debouncing) {
+ if (--debouncing)
+ _delay_ms(1);
+ else
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++)
+ matrix[i] = matrix_debouncing[i];
+ }
+
+ matrix_scan_quantum();
+ return 1;
+}
+
+inline matrix_row_t matrix_get_row(uint8_t row) {
+ return matrix[row];
+}
+
+void matrix_print(void) {
+#ifndef NO_PRINT
+ print("\nr\\c ABCDEFGHIJKLMNOPQR\n");
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ matrix_row_t matrix_row = matrix_get_row(row);
+ xprintf("%02X: ", row);
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ bool curr_bit = matrix_row & (1<<col);
+ xprintf("%c", curr_bit ? '*' : '.');
+ }
+ print("\n");
+ }
+#endif
+}
+
+uint8_t matrix_key_count(void) {
+ uint8_t count = 0;
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++)
+ count += bitpop32(matrix[row]);
+ return count;
+}