/* 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" #ifndef DEBOUNCE # define DEBOUNCE 5 #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 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; } /* Column pin configuration * * col: 0 1 2 3 4 5 6 7 * pin: PC7 PD5 PD3 PD1 PC2 PD6 PD4 PD2 * * Rrr pin configuration * * These rrrs uses one 74HC154 4 to 16 bit demultiplexer (low * active), together with 2 rrrs driven directly from the micro * controller, to control the 18 rrrs. The rrrs are driven from * pins B6,5,4,3,2,1,0. */ void matrix_init(void) { DDRC &= ~0b10000100; // Row input pins DDRD &= ~0b01111110; PORTC |= 0b10000100; PORTD |= 0b01111110; DDRB |= 0b01111111; // Column output pins for (uint8_t i=0; i < MATRIX_ROWS; i++) { matrix[i] = 0; 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); uint8_t rows = read_rows(); 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); debouncing = DEBOUNCE; } } } 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; } bool matrix_is_modified(void) { if (debouncing) return false; else 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 uint8_t read_rows(void) { return (PINC&(1<<7) ? 0 : (1<<0)) | (PIND&(1<<5) ? 0 : (1<<1)) | (PIND&(1<<3) ? 0 : (1<<2)) | (PIND&(1<<1) ? 0 : (1<<3)) | (PINC&(1<<2) ? 0 : (1<<4)) | (PIND&(1<<2) ? 0 : (1<<5)) | (PIND&(1<<4) ? 0 : (1<<6)) | (PIND&(1<<6) ? 0 : (1<<7)); } static void select_col(uint8_t col) { switch (col) { case 0: PORTB = (PORTB & ~0b01111111) | 0b01100100; break; case 1: PORTB = (PORTB & ~0b01111111) | 0b01101100; break; case 2: PORTB = (PORTB & ~0b01111111) | 0b01100010; break; case 3: PORTB = (PORTB & ~0b01111111) | 0b01111010; break; case 4: PORTB = (PORTB & ~0b01111111) | 0b01100110; break; case 5: PORTB = (PORTB & ~0b01111111) | 0b01110110; break; case 6: PORTB = (PORTB & ~0b01111111) | 0b01101110; break; case 7: PORTB = (PORTB & ~0b01111111) | 0b01111110; break; case 8: PORTB = (PORTB & ~0b01111111) | 0b01000001; break; case 9: PORTB = (PORTB & ~0b01111111) | 0b00100001; break; case 10: PORTB = (PORTB & ~0b01111111) | 0b01101010; break; case 11: PORTB = (PORTB & ~0b01111111) | 0b01110010; break; case 12: PORTB = (PORTB & ~0b01111111) | 0b01111100; break; case 13: PORTB = (PORTB & ~0b01111111) | 0b01110100; break; case 14: PORTB = (PORTB & ~0b01111111) | 0b01111000; break; case 15: PORTB = (PORTB & ~0b01111111) | 0b01110000; break; case 16: PORTB = (PORTB & ~0b01111111) | 0b01100000; break; case 17: PORTB = (PORTB & ~0b01111111) | 0b01101000; break; } }