/* 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 "backlight.h" #ifndef DEBOUNCE # define DEBOUNCE 5 #endif static uint8_t debouncing = DEBOUNCE; /* matrix state(1:on, 0:off) */ static matrix_row_t matrix[MATRIX_ROWS]; static matrix_row_t matrix_debouncing[MATRIX_ROWS]; static uint16_t read_inputs(void); static void init_inputs(void); static void init_outputs(void); static void reset_inputs(void); static void reset_outputs(void); static void select_output(uint8_t col); inline uint8_t matrix_rows(void) { return MATRIX_ROWS; } inline uint8_t matrix_cols(void) { return MATRIX_COLS; } void matrix_init(void) { backlight_init_ports(); init_inputs(); init_outputs(); 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++) { reset_inputs(); reset_outputs(); select_output(col); _delay_us(3); uint16_t rows = read_inputs(); 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; } } } 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++) { phex(row); print(": "); pbin_reverse16(matrix_get_row(row)); print("\n"); } } uint8_t matrix_key_count(void) { uint8_t count = 0; for (uint8_t i = 0; i < MATRIX_ROWS; i++) { count += bitpop16(matrix[i]); } return count; } static void init_inputs(void) { DDRE &= ~0b01000000; // PE6 (Col 0) DDRB &= ~0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4) DDRF &= ~0b00000001; // PF0 (Col 5) DDRD &= ~0b00100011; // PD0 (Col 6), PD1 (Col 8 TKL), PD5 (Col 7) } static uint16_t read_inputs(void) { return (PINE&(1<<6) ? 0 : (1<<0)) | // PE6 (Col 0) (PINB&(1<<0) ? 0 : (1<<1)) | // PB0 (Col 1) (PINB&(1<<1) ? 0 : (1<<2)) | // PB1 (Col 2) (PINB&(1<<2) ? 0 : (1<<3)) | // PB2 (Col 3) (PINB&(1<<3) ? 0 : (1<<4)) | // PB3 (Col 4) (PINF&(1<<0) ? 0 : (1<<5)) | // PF0 (Col 5) (PIND&(1<<0) ? 0 : (1<<6)) | // PD0 (Col 6) (PIND&(1<<5) ? 0 : (1<<7)) | // PD5 (Col 7) (PIND&(1<<1) ? 0 : (1<<8)); // PD1 (Col 8 TKL) } static void reset_inputs(void) { PORTE |= 0b01000000; // PE6 (Col 0) PORTB |= 0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4) PORTF |= 0b00000001; // PF0 (Col 5) PORTD |= 0b00100011; // PD0 (Col 6), PD1 (Col 8 TKL), PD5 (Col 7) } static void init_outputs(void) { DDRB |= 0b00010000; // PB4 (Row 0) DDRE |= 0b00000100; // PE2 (Row 1) DDRF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7) DDRC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9) DDRD |= 0b10000000; // PD7 (Row 8) } static void reset_outputs(void) { PORTB |= 0b00010000; // PB4 (Row 0) PORTE |= 0b00000100; // PE2 (Row 1) PORTF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7) PORTC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9) PORTD |= 0b10000000; // PD7 (Row 8) } static void select_output(uint8_t col) { switch (col) { case 0: PORTB &= ~(1<<4); break; case 1: PORTE &= ~(1<<2); break; case 2: PORTF &= ~(1<<4); break; case 3: PORTF &= ~(1<<7); break; case 4: PORTF &= ~(1<<1); break; case 5: PORTF &= ~(1<<6); break; case 6: PORTC &= ~(1<<6); break; case 7: PORTF &= ~(1<<5); break; case 8: PORTD &= ~(1<<7); break; case 9: PORTC &= ~(1<<7); break; } }