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- /*
- Copyright 2014 Ralf Schmitt <[email protected]>
-
- 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"
- #include "backlight.h"
-
-
- #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 uint16_t read_inputs(void);
- static void init_inputs(void);
- static void init_outputs(void);
- static void reset_inputs(void);
- static void reset_outputs(void);
- static void select_output(uint8_t col);
-
- inline
- uint8_t matrix_rows(void)
- {
- return MATRIX_ROWS;
- }
-
- inline
- uint8_t matrix_cols(void)
- {
- return MATRIX_COLS;
- }
-
- void matrix_init(void)
- {
- backlight_init_ports();
- init_inputs();
- init_outputs();
-
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
- }
-
- uint8_t matrix_scan(void)
- {
- for (uint8_t col = 0; col < MATRIX_COLS; col++) {
- reset_inputs();
- reset_outputs();
- select_output(col);
- _delay_us(3);
- uint16_t rows = read_inputs();
- 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;
- }
- }
- }
-
- 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;
- }
-
- static void init_inputs(void)
- {
- DDRE &= ~0b01000000; // PE6 (Col 0)
- DDRB &= ~0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4)
- DDRF &= ~0b00000001; // PF0 (Col 5)
- DDRD &= ~0b00100011; // PD0 (Col 6), PD1 (Col 8 TKL), PD5 (Col 7)
- }
-
- static uint16_t read_inputs(void)
- {
- return (PINE&(1<<6) ? 0 : (1<<0)) | // PE6 (Col 0)
- (PINB&(1<<0) ? 0 : (1<<1)) | // PB0 (Col 1)
- (PINB&(1<<1) ? 0 : (1<<2)) | // PB1 (Col 2)
- (PINB&(1<<2) ? 0 : (1<<3)) | // PB2 (Col 3)
- (PINB&(1<<3) ? 0 : (1<<4)) | // PB3 (Col 4)
- (PINF&(1<<0) ? 0 : (1<<5)) | // PF0 (Col 5)
- (PIND&(1<<0) ? 0 : (1<<6)) | // PD0 (Col 6)
- (PIND&(1<<5) ? 0 : (1<<7)) | // PD5 (Col 7)
- (PIND&(1<<1) ? 0 : (1<<8)); // PD1 (Col 8 TKL)
- }
-
- static void reset_inputs(void)
- {
- PORTE |= 0b01000000; // PE6 (Col 0)
- PORTB |= 0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4)
- PORTF |= 0b00000001; // PF0 (Col 5)
- PORTD |= 0b00100011; // PD0 (Col 6), PD1 (Col 8 TKL), PD5 (Col 7)
- }
-
- static void init_outputs(void)
- {
- DDRB |= 0b00010000; // PB4 (Row 0)
- DDRE |= 0b00000100; // PE2 (Row 1)
- DDRF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7)
- DDRC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9)
- DDRD |= 0b10000000; // PD7 (Row 8)
- }
-
- static void reset_outputs(void)
- {
- PORTB |= 0b00010000; // PB4 (Row 0)
- PORTE |= 0b00000100; // PE2 (Row 1)
- PORTF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7)
- PORTC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9)
- PORTD |= 0b10000000; // PD7 (Row 8)
- }
-
- static void select_output(uint8_t col)
- {
- switch (col) {
- case 0:
- PORTB &= ~(1<<4);
- break;
- case 1:
- PORTE &= ~(1<<2);
- break;
- case 2:
- PORTF &= ~(1<<4);
- break;
- case 3:
- PORTF &= ~(1<<7);
- break;
- case 4:
- PORTF &= ~(1<<1);
- break;
- case 5:
- PORTF &= ~(1<<6);
- break;
- case 6:
- PORTC &= ~(1<<6);
- break;
- case 7:
- PORTF &= ~(1<<5);
- break;
- case 8:
- PORTD &= ~(1<<7);
- break;
- case 9:
- PORTC &= ~(1<<7);
- break;
- }
- }
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