/* Copyright 2019 MechMerlin <mechmerlin@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/>. */ #include <util/delay.h> #include <avr/io.h> #include <stdio.h> #include "matrix.h" #include "util.h" #include "print.h" #include "debug.h" 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 uint8_t read_rows(uint8_t col); static void init_rows(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) { } void backlight_init_ports(void) { // DDRD |= 0b11010000; // PORTD &= ~0b01010000; // PORTD |= 0b10000000; // DDRB |= 0b00011111; // PORTB &= ~0b00001110; // PORTB |= 0b00010001; // DDRE |= 0b01000000; // PORTE &= ~0b01000000; } void matrix_init(void) { backlight_init_ports(); unselect_cols(); init_rows(); 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(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 = DEBOUNCE; } } 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; } 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))); } } /* Row pin configuration * row: 0 1 2 3 4 5 * pin: PB7 PD0 PD1 PD2 PD3 PD5 * * Reset Key uses its own pin PE2 */ static void init_rows(void) { DDRD &= ~0b00101111; PORTD &= ~0b00101111; DDRB &= ~0b10000000; PORTB &= ~0b10000000; DDRE &= ~0b00000100; PORTE |= 0b00000100; } static uint8_t read_rows(uint8_t col) { if (col == 19) { return PINE&(1<<2) ? 0 : (1<<0); } else { return (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) | (PINB&(1<<7) ? (1<<0) : 0); } } /* Columns 0 - G * These columns uses two 74HC237D 3 to 8 bit demultiplexers. * * atmega32u4 decoder pin * C6 U1 E2 * B6 U2 E2 * F0 U1, U2 A0 * F1 U1, U2 A1 * C7 U1, U2 A2 * * col 0: B4 * col 1: D7 * col I: B5 * * col / pin: PC6 PB6 PF0 PF1 PC7 Decoder Pin * 2: 1 0 0 0 0 U1 Y0 * 3: 1 0 1 0 0 U1 Y1 * 4: 1 0 0 1 0 U1 Y2 * 5: 1 0 1 1 0 U1 Y3 * 6: 1 0 0 0 1 U1 Y4 * 7: 1 0 1 0 1 U1 Y5 * 8: 1 0 0 1 1 U1 Y6 * 9: 1 0 1 1 1 U1 Y7 * A: 0 1 0 0 0 U2 Y0 * B: 0 1 1 0 0 U2 Y1 * C: 0 1 0 1 0 U2 Y2 * D: 0 1 1 1 0 U2 Y3 * E: 0 1 0 0 1 U2 Y4 * F: 0 1 1 0 1 U2 Y5 * G: 0 1 0 1 1 U2 Y6 * H: 0 1 1 1 1 U2 Y7 * */ static void unselect_cols(void) { DDRB |= 0b01110000; PORTB &= ~0b01110000; DDRC |= 0b11000000; PORTC &= ~0b11000000; DDRD |= 0b10000000; PORTD &= ~0b10000000; DDRF |= 0b00000011; PORTF &= ~0b00000011; } static void select_col(uint8_t col) { switch (col) { case 0: PORTB |= 0b00010000; break; case 1: PORTD |= 0b10000000; break; case 2: // U1 Y0 PORTC |= 0b01000000; break; case 3: // U1 Y1 PORTC |= 0b01000000; PORTF |= 0b00000001; break; case 4: // U1 Y2 PORTC |= 0b01000000; PORTF |= 0b00000010; break; case 5: // U1 Y3 PORTC |= 0b01000000; PORTF |= 0b00000011; break; case 6: // U1 Y4 PORTC |= 0b11000000; break; case 7: // U1 Y5 PORTC |= 0b11000000; PORTF |= 0b00000001; break; case 8: // U1 Y6 PORTC |= 0b11000000; PORTF |= 0b00000010; break; case 9: // U1 Y7 PORTC |= 0b11000000; PORTF |= 0b00000011; break; case 10: // U2 Y0 PORTB |= 0b01000000; break; case 11: // U2 Y1 PORTB |= 0b01000000; PORTF |= 0b00000001; break; case 12: // U2 Y2 PORTB |= 0b01000000; PORTF |= 0b00000010; break; case 13: // U2 Y3 PORTB |= 0b01000000; PORTF |= 0b00000011; break; case 14: // U2 Y4 PORTB |= 0b01000000; PORTC |= 0b10000000; break; case 15: // U2 Y5 PORTB |= 0b01000000; PORTC |= 0b10000000; PORTF |= 0b00000001; break; case 16: // U2 Y6 PORTB |= 0b01000000; PORTC |= 0b10000000; PORTF |= 0b00000010; break; case 17: // U2 Y7 PORTB |= 0b01000000; PORTC |= 0b10000000; PORTF |= 0b00000011; break; case 18: PORTB |= 0b00100000; break; } }