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- /*
- Copyright 2014 Ralf Schmitt <[email protected]>
-
- 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"
- #include "eeconfig.h"
- #include "action_layer.h"
- #include "backlight.h"
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 0
- #endif
- static uint8_t debouncing = DEBOUNCE;
-
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static uint8_t read_rows(void);
- static uint8_t read_fwkey(void);
- static void init_rows(void);
- static void unselect_cols(void);
- static void select_col(uint8_t col);
-
- inline
- uint8_t matrix_rows(void)
- {
- return MATRIX_ROWS;
- }
-
- inline
- uint8_t matrix_cols(void)
- {
- return MATRIX_COLS;
- }
-
- void misc_init(void) {
- }
-
- void matrix_init(void)
- {
- backlight_init_ports();
- unselect_cols();
- init_rows();
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
- }
-
- uint8_t matrix_scan(void)
- {
- for (uint8_t col = 0; col < MATRIX_COLS; col++) {
- select_col(col);
- _delay_us(3);
- uint8_t rows = read_rows();
- // Use the otherwise unused col: 0 row: 0 for firmware key
- if(col == 0) {
- rows |= read_fwkey();
- }
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
- bool curr_bit = rows & (1<<row);
- if (prev_bit != curr_bit) {
- matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
- if (debouncing) {
- dprint("bounce!: "); dprintf("%02X", debouncing); dprintln();
- }
- debouncing = DEBOUNCE;
- }
- }
- unselect_cols();
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
-
- return 1;
- }
-
- bool matrix_is_modified(void)
- {
- if (debouncing) return false;
- return true;
- }
-
- inline
- bool matrix_is_on(uint8_t row, uint8_t col)
- {
- return (matrix[row] & ((matrix_row_t)1<<col));
- }
-
- inline
- matrix_row_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
-
- void matrix_print(void)
- {
- print("\nr/c 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
- }
- }
-
- uint8_t matrix_key_count(void)
- {
- uint8_t count = 0;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- count += bitpop32(matrix[i]);
- }
- return count;
- }
-
- /* Row configuration
- *
- * row: 0 1 2 3 4 5
- * pin: PD0 PD1 PD2 PD3 PD5 PB7
- *
- * Firmware uses pin PE2
- */
- static void init_rows(void)
- {
- DDRD &= ~0b00101111;
- PORTD |= 0b00101111;
-
- DDRB &= ~0b10000000;
- PORTB |= 0b10000000;
-
- DDRE &= ~0b00000100;
- PORTE |= 0b00000100;
- }
-
- static uint8_t read_rows(void)
- {
- return (PIND&(1<<0) ? (1<<0) : 0) |
- (PIND&(1<<1) ? (1<<1) : 0) |
- (PIND&(1<<2) ? (1<<2) : 0) |
- (PIND&(1<<3) ? (1<<3) : 0) |
- (PIND&(1<<5) ? (1<<4) : 0) |
- (PINB&(1<<7) ? (1<<5) : 0);
- }
-
- static uint8_t read_fwkey(void)
- {
- return PINE&(1<<2) ? 0 : (1<<0);
- }
-
- /* Column configuration
- *
- * col: 0 1 2 3
- * pin: PF0 PF1 PC7 PC6
- */
- static void unselect_cols(void)
- {
- DDRF |= 0b00000011;
- PORTF &= ~0b00000011;
- DDRC |= 0b11000000;
- PORTC &= ~0b11000000;
- }
-
- static void select_col(uint8_t col)
- {
- switch (col) {
- case 0:
- PORTF |= (1<<0);
- break;
- case 1:
- PORTF |= (1<<1);
- break;
- case 2:
- PORTC |= (1<<7);
- break;
- case 3:
- PORTC |= (1<<6);
- break;
- }
- }
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