/* Copyright 2014 Kai Ryu <kai1103@gmail.com> 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/>. */ /* * scan matrix */ #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" #ifdef UART_RGB_ENABLE #include "uart_rgb.h" #endif #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 matrix_row_t read_cols(void); static void init_cols(void); static void init_rows(void); static void unselect_rows(void); static void select_row(uint8_t row); inline uint8_t matrix_rows(void) { return MATRIX_ROWS; } inline uint8_t matrix_cols(void) { return MATRIX_COLS; } void matrix_init(void) { #ifdef UART_RGB_ENABLE uart_rgb_init(); #endif // disable JTAG MCUCR = _BV(JTD); MCUCR = _BV(JTD); // 85 REST DDRD |= _BV(PD7); PORTD |= _BV(PD7); // initialize row and col init_rows(); init_cols(); // initialize matrix state: all keys off for (uint8_t i=0; i < MATRIX_ROWS; i++) { matrix[i] = 0; matrix_debouncing[i] = 0; } } uint8_t matrix_scan(void) { for (uint8_t i = 0; i < MATRIX_ROWS; i++) { select_row(i); _delay_us(30); // without this wait read unstable value. matrix_row_t cols = read_cols(); if (matrix_debouncing[i] != cols) { matrix_debouncing[i] = cols; if (debouncing) { debug("bounce!: "); debug_hex(debouncing); debug("\n"); } debouncing = DEBOUNCE; } unselect_rows(); } 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; } /* Column pin configuration * col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * pin: F7 F6 F5 F4 F1 F0 E6 D7 D6 D5 D1 D0 B7 B6 B0 C7 * */ static void init_cols(void) { // Input with pull-up(DDR:0, PORT:1) DDRF &= 0b00001100; PORTF |= 0b11110011; DDRD &= 0b00011100; PORTD |= 0b11100011; DDRB &= ~(_BV(PB6) | _BV(PB7)| _BV(PB0)); PORTB |= (_BV(PB6) | _BV(PB7)| _BV(PB0)); DDRE &= ~_BV(PE6); PORTE |= _BV(PE6); DDRC &= ~_BV(PC7); PORTC |= _BV(PC7); } static matrix_row_t read_cols(void) { return (PINF&_BV(PF7) ? 0 : (1<<0)) | (PINF&_BV(PF6) ? 0 : (1<<1)) | (PINF&_BV(PF5) ? 0 : (1<<2)) | (PINF&_BV(PF4) ? 0 : (1<<3)) | (PINF&_BV(PF1) ? 0 : (1<<4)) | (PINF&_BV(PF0) ? 0 : (1<<5)) | (PINE&_BV(PE6) ? 0 : (1<<6)) | (PIND&_BV(PD7) ? 0 : (1<<7)) | (PIND&_BV(PD6) ? 0 : (1<<8)) | (PIND&_BV(PD5) ? 0 : (1<<9)) | (PIND&_BV(PD1) ? 0 : (1<<10)) | (PIND&_BV(PD0) ? 0 : (1<<11)) | (PINB&_BV(PB7) ? 0 : (1<<12)) | (PINB&_BV(PB6) ? 0 : (1<<13)) | (PINB&_BV(PB0) ? 0 : (1<<14)) | (PINC&_BV(PC7) ? 0 : (1<<15)); } /* Row pin configuration * row: 0 1 2 3 4 5 x * pin: B3 0 1 0 1 0 1 1 * B2 0 0 1 1 0 0 1 * B1 0 0 0 0 1 1 1 */ static void init_rows(void) { DDRB |= (1<<PB1 | 1<<PB2 | 1<<PB3); } static void unselect_rows(void) { // Hi-Z(DDR:0, PORT:0) to unselect PORTB |= (1<<PB1); PORTB |= (1<<PB2); PORTB |= (1<<PB3); } static void select_row(uint8_t row) { // Output low(DDR:1, PORT:0) to select (row & (1<<0)) ? (PORTB |= (1<<PB3)) : (PORTB &= ~(1<<PB3)); (row & (1<<1)) ? (PORTB |= (1<<PB2)) : (PORTB &= ~(1<<PB2)); (row & (1<<2)) ? (PORTB |= (1<<PB1)) : (PORTB &= ~(1<<PB1)); }