#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 DEBOUNCING_DELAY # define DEBOUNCING_DELAY 5 #endif static uint8_t debouncing = DEBOUNCING_DELAY; static matrix_row_t matrix[MATRIX_ROWS]; static matrix_row_t matrix_debouncing[MATRIX_ROWS]; static uint8_t read_rows(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; } __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) { } void matrix_init(void) { // initialize row and col unselect_cols(); init_rows(); // initialize matrix state: all keys off 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 = 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]; } } } 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; } /* Row pin configuration * * row: 0 1 2 3 4 5 * pin: C7 B1 B2 C6 B4 B5 * */ static void init_rows(void) { DDRC &= ~0b11000000; DDRB &= ~0b00110110; PORTC |= 0b11000000; PORTB |= 0b00110110; } static uint8_t read_rows(void) { return (PINC&(1<<PC7) ? 0 : (1<<0)) | (PINB&(1<<PB1) ? 0 : (1<<1)) | (PINB&(1<<PB2) ? 0 : (1<<2)) | (PINC&(1<<PC6) ? 0 : (1<<3)) | (PINB&(1<<PB4) ? 0 : (1<<4)) | (PINB&(1<<PB5) ? 0 : (1<<5)); } /* Row pin configuration * pin: D3 D7 D6 D5 D4 * row: off 0 x x x x * 0 1 0 0 0 0 * 1 1 0 0 0 1 * 2 1 0 0 1 0 * 3 1 0 0 1 1 * 4 1 0 1 0 0 * 5 1 0 1 0 1 * 6 1 0 1 1 0 * 7 1 0 1 1 1 * 8 1 1 0 0 0 * 9 1 1 0 0 1 * 10 1 1 0 1 0 * 11 1 1 0 1 1 * 12 1 1 1 0 0 * 13 1 1 1 0 1 * 14 1 1 1 1 0 * 15 1 1 1 1 1 */ static void unselect_cols(void) { // output high(DDR:1, PORT:1) to unselect DDRB |= (1 << PD3); PORTB |= (1 << PD3); } static void select_col(uint8_t col) { DDRD |= (1<<PD3 | 1<<PD4 | 1<<PD5 | 1<<PD6 | 1<<PD7); PORTD &= ~(1<<PD3); if (col & (1<<0)) { PORTD |= (1<<PD4); } else { PORTD &= ~(1<<PD4); } if (col & (1<<1)) { PORTD |= (1<<PD5); } else { PORTD &= ~(1<<PD5); } if (col & (1<<2)) { PORTD |= (1<<PD6); } else { PORTD &= ~(1<<PD6); } if (col & (1<<3)) { PORTD |= (1<<PD7); } else { PORTD &= ~(1<<PD7); } }