/* Copyright 2016 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" static uint8_t debouncing = DEBOUNCING_DELAY; /* matrix state(1:on, 0:off) */ static matrix_row_t matrix[MATRIX_ROWS]; static matrix_row_t matrix_debouncing[MATRIX_ROWS]; static uint8_t read_rows(uint8_t col); static void init_ports(void); static void unselect_cols(void); static void select_col(uint8_t col); __attribute__ ((weak)) void matrix_init_kb(void) { matrix_init_user(); } __attribute__ ((weak)) void matrix_scan_kb(void) { matrix_scan_user(); } __attribute__ ((weak)) void matrix_init_user(void) { } __attribute__ ((weak)) void matrix_scan_user(void) { } inline uint8_t matrix_rows(void) { return MATRIX_ROWS; } inline uint8_t matrix_cols(void) { return MATRIX_COLS; } void backlight_init_ports(void) { DDRD |= 0b01010000; PORTD &= 0b10101111; DDRB |= 0b00001110; PORTB &= 0b11110001; DDRE |= 0b01000000; PORTE &= 0b10111111; } void matrix_init(void) { backlight_init_ports(); unselect_cols(); init_ports(); 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(col); 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 = DEBOUNCING_DELAY; } } 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; } static void init_ports(void) { // Rows are inputs (inputs are 0) DDRD &= 0b11010000; DDRB &= 0b01111111; DDRE &= 0b11111011; // Columns are outputs (outputs are high) DDRF |= 0b00000011; DDRC |= 0b11000000; DDRB |= 0b01110001; DDRD |= 0b10000000; } static uint8_t read_rows(uint8_t col) { if(col == 15) { return (PINE&(1<<2) ? 0 : (1<<0)) | (PIND&(1<<0) ? (1<<1) : 0) | (PIND&(1<<1) ? (1<<2) : 0) | (PIND&(1<<2) ? (1<<3) : 0) | (PIND&(1<<3) ? (1<<4) : 0) | (PIND&(1<<5) ? (1<<5) : 0); } else { return (PINB&(1<<7) ? (1<<0) : 0) | (PIND&(1<<0) ? (1<<1) : 0) | (PIND&(1<<1) ? (1<<2) : 0) | (PIND&(1<<2) ? (1<<3) : 0) | (PIND&(1<<3) ? (1<<4) : 0) | (PIND&(1<<5) ? (1<<5) : 0); } } static void unselect_cols(void) { PORTF &= 0b11111100; PORTC &= 0b00111111; PORTB &= 0b10001110; PORTD &= 0b01111111; } static void select_col(uint8_t col) { switch (col) { case 0: PORTC |= 0b01000000; break; case 1: PORTC |= 0b01000000; PORTF |= 0b00000001; break; case 2: PORTC |= 0b01000000; PORTF |= 0b00000010; break; case 3: PORTC |= 0b01000000; PORTF |= 0b00000011; break; case 4: PORTC |= 0b11000000; break; case 5: PORTC |= 0b11000000; PORTF |= 0b00000001; break; case 6: PORTC |= 0b11000000; PORTF |= 0b00000010; break; case 7: PORTC |= 0b11000000; PORTF |= 0b00000011; break; case 8: PORTB |= 0b01000000; break; case 9: PORTB |= 0b01000000; PORTF |= 0b00000001; break; case 10: PORTB |= 0b01000000; PORTF |= 0b00000010; break; case 11: PORTB |= 0b01000000; PORTF |= 0b00000011; break; case 12: PORTB |= 0b01000000; PORTC |= 0b10000000; break; case 13: PORTB |= 0b01000000; PORTF |= 0b00000001; PORTC |= 0b10000000; break; case 14: PORTB |= 0b01000000; PORTF |= 0b00000010; PORTC |= 0b10000000; break; case 15: PORTB |= 0b01000000; PORTF |= 0b00000011; PORTC |= 0b10000000; break; case 16: PORTB |= 0b00100000; break; case 17: PORTB |= 0b00010000; break; case 18: PORTD |= 0b10000000; break; case 19: PORTB |= 0b00000001; break; } }