275 lines
5.9 KiB
C
275 lines
5.9 KiB
C
/*
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Copyright 2016-2017 Ralf Schmitt <ralf@bunkertor.net> Rasmus Schults <rasmusx@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <util/delay.h>
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#include <avr/io.h>
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#include <stdio.h>
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#include "matrix.h"
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#include "util.h"
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#include "print.h"
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#include "debug.h"
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static uint8_t debouncing = DEBOUNCING_DELAY;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static uint8_t read_rows(void);
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static uint8_t read_fwkey(void);
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static void init_rows(void);
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static void unselect_cols(void);
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static void select_col(uint8_t col);
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__attribute__ ((weak))
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void matrix_init_kb(void) {
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matrix_init_user();
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}
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__attribute__ ((weak))
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void matrix_scan_kb(void) {
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matrix_scan_user();
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}
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__attribute__ ((weak))
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void matrix_init_user(void) {
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}
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__attribute__ ((weak))
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void matrix_scan_user(void) {
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}
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void matrix_init(void) {
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DDRD |= 0b11010000;
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PORTD &= ~0b01010000;
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DDRB |= 0b00011111;
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PORTB &= ~0b00001110;
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PORTB |= 0b00010001;
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DDRE |= 0b01000000;
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PORTE &= ~0b01000000;
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unselect_cols();
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init_rows();
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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matrix_init_quantum();
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}
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uint8_t matrix_scan(void) {
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for (uint8_t col = 0; col < MATRIX_COLS; col++) {
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select_col(col);
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_delay_us(3);
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uint8_t rows = read_rows();
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if(col == 0) {
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rows |= read_fwkey();
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}
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
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bool curr_bit = rows & (1<<row);
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if (prev_bit != curr_bit) {
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matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
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debouncing = DEBOUNCING_DELAY;
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}
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}
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unselect_cols();
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}
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = matrix_debouncing[i];
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}
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}
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}
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matrix_scan_quantum();
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return 1;
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}
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inline matrix_row_t matrix_get_row(uint8_t row) {
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return matrix[row];
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}
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void matrix_print(void) {
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
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}
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}
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/* Row pin configuration
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* row: 0 1 2 3 4 5
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* pin: PB7 PD0 PD1 PD2 PD3 PD5
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*
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* Esc uses its own pin PE2
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*/
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static void init_rows(void) {
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DDRB &= ~0b10000000;
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PORTB &= ~0b10000000;
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DDRD &= ~0b00101111;
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PORTD &= ~0b00101111;
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DDRE &= ~0b00000100;
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PORTE |= 0b00000100;
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}
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static uint8_t read_rows() {
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return (PINB&(1<<7) ? (1<<0) : 0) |
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(PIND&(1<<0) ? (1<<1) : 0) |
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(PIND&(1<<1) ? (1<<2) : 0) |
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(PIND&(1<<2) ? (1<<3) : 0) |
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(PIND&(1<<3) ? (1<<4) : 0) |
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(PIND&(1<<5) ? (1<<5) : 0);
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}
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static uint8_t read_fwkey(void)
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{
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return PINE&(1<<2) ? 0 : (1<<0);
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}
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/* Columns 0 - 15
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* These columns uses two 74HC237D 3 to 8 bit demultiplexers.
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* col / pin: PC6 PB6 PF0 PF1 PC7
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* 0: 1 0 0 0 0
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* 1: 1 0 1 0 0
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* 2: 1 0 0 1 0
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* 3: 1 0 1 1 0
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* 4: 1 0 0 0 1
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* 5: 1 0 1 0 1
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* 6: 1 0 0 1 1
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* 7: 1 0 1 1 1
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* 8: 0 1 0 0 0
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* 9: 0 1 1 0 0
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* 10: 0 1 0 1 0
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* 11: 0 1 1 1 0
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* 12: 0 1 0 0 1
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* 13: 0 1 1 0 1
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* 14: 0 1 0 1 1
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* 15: 0 1 1 1 1
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*
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* col: 16
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* pin: PB5
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*
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* col: 17
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* pin: PB4
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*
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* col: 18
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* pin: PD7
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*/
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static void unselect_cols(void) {
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DDRB |= 0b01110000;
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PORTB &= ~0b01110000;
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DDRC |= (1<<6) | (1<<7);
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PORTC &= ~((1<<6) | (1<<7));
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DDRF |= (1<<0) | (1<<1);
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PORTF &= ~((1<<0) | (1<<1));
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DDRD |= (1<<7);
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PORTD &= ~(1<<7);
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}
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static void select_col(uint8_t col) {
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switch (col) {
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case 0:
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PORTC |= (1<<6);
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break;
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case 1:
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PORTC |= (1<<6);
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PORTF |= (1<<0);
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break;
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case 2:
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PORTC |= (1<<6);
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PORTF |= (1<<1);
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break;
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case 3:
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PORTC |= (1<<6);
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PORTF |= (1<<0) | (1<<1);
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break;
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case 4:
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PORTC |= (1<<6);
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PORTC |= (1<<7);
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break;
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case 5:
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PORTC |= (1<<6);
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PORTF |= (1<<0);
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PORTC |= (1<<7);
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break;
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case 6:
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PORTC |= (1<<6);
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PORTF |= (1<<1);
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PORTC |= (1<<7);
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break;
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case 7:
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PORTC |= (1<<6);
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PORTF |= (1<<0) | (1<<1);
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PORTC |= (1<<7);
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break;
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case 8:
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PORTB |= (1<<6);
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break;
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case 9:
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PORTB |= (1<<6);
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PORTF |= (1<<0);
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break;
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case 10:
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PORTB |= (1<<6);
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PORTF |= (1<<1);
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break;
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case 11:
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PORTB |= (1<<6);
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PORTF |= (1<<0) | (1<<1);
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break;
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case 12:
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PORTB |= (1<<6);
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PORTC |= (1<<7);
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break;
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case 13:
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PORTB |= (1<<6);
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PORTF |= (1<<0);
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PORTC |= (1<<7);
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break;
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case 14:
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PORTB |= (1<<6);
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PORTF |= (1<<1);
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PORTC |= (1<<7);
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break;
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case 15:
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PORTB |= (1<<6);
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PORTF |= (1<<0) | (1<<1);
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PORTC |= (1<<7);
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break;
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case 16:
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PORTB |= (1<<5);
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break;
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case 17:
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PORTB |= (1<<4);
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break;
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case 18:
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PORTD |= (1<<7);
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break;
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}
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}
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