/* Copyright 2014 Ralf Schmitt <ralf@bunkertor.net> 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; } }