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Add initial files for hid_libre.
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233
keyboard/hid_libre/matrix.c
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233
keyboard/hid_libre/matrix.c
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/*
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Copyright 2011 Jun Wako <wakojun@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 <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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static uint8_t debouncing = DEBOUNCE;
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// bit array of key state(1:on, 0:off)
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static matrix_row_t *matrix;
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static matrix_row_t *matrix_debounced;
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static matrix_row_t _matrix0[MATRIX_ROWS];
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static matrix_row_t _matrix1[MATRIX_ROWS];
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#define NROW 18
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#define NCOL 8
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#define _DDRA (uint8_t *const)&DDRA
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#define _DDRB (uint8_t *const)&DDRB
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#define _DDRC (uint8_t *const)&DDRC
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#define _DDRD (uint8_t *const)&DDRD
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#define _DDRE (uint8_t *const)&DDRE
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#define _DDRF (uint8_t *const)&DDRF
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#define _PINA (uint8_t *const)&PINA
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#define _PINB (uint8_t *const)&PINB
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#define _PINC (uint8_t *const)&PINC
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#define _PIND (uint8_t *const)&PIND
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#define _PINE (uint8_t *const)&PINE
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#define _PINF (uint8_t *const)&PINF
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#define _PORTA (uint8_t *const)&PORTA
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#define _PORTB (uint8_t *const)&PORTB
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#define _PORTC (uint8_t *const)&PORTC
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#define _PORTD (uint8_t *const)&PORTD
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#define _PORTE (uint8_t *const)&PORTE
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#define _PORTF (uint8_t *const)&PORTF
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#define _BIT0 0x01
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#define _BIT1 0x02
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#define _BIT2 0x04
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#define _BIT3 0x08
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#define _BIT4 0x10
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#define _BIT5 0x20
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#define _BIT6 0x40
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#define _BIT7 0x80
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/* Specifies the ports and pin numbers for the rows */
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static
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uint8_t *const row_ddr[NROW] = { _DDRB, _DDRB,
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_DDRC, _DDRC,
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_DDRD, _DDRD, _DDRD, _DDRD, _DDRD, _DDRD, _DDRD, _DDRD,
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_DDRF, _DDRF, _DDRF, _DDRF, _DDRF, _DDRF};
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static
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uint8_t *const row_port[NROW] = { _PORTB, _PORTB,
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_PORTC, _PORTC,
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_PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD,
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_PORTF, _PORTF, _PORTF, _PORTF, _PORTF, _PORTF};
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static
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uint8_t *const row_pin[NROW] = { _PINB, _PINB,
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_PINC, _PINC,
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_PIND, _PIND, _PIND, _PIND, _PIND, _PIND, _PIND, _PIND,
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_PINF, _PINF, _PINF, _PINF, _PINF, _PINF};
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static
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const uint8_t row_bit[NROW] = { _BIT4, _BIT7,
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_BIT6, _BIT7,
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_BIT0, _BIT1, _BIT2, _BIT3, _BIT4, _BIT5, _BIT6, _BIT7,
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_BIT0, _BIT1, _BIT4, _BIT5, _BIT6, _BIT7};
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static
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const uint8_t mask = 0x0E;
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/* Specifies the ports and pin numbers for the columns */
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static
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const uint8_t col_bit[NCOL] = { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E};
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static
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inline void pull_column(int col) {
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PORTB = col_bit[col] | (PORTB & ~mask);
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}
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static
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inline void release_column(int col) {
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}
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/* PORTB is set as input with pull-up resistors
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PORTC,D,E,F are set to high output */
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static
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void setup_io_pins(void) {
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uint8_t row;
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DDRB |= 0x0E;
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PORTB &= ~0x0E;
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for(row = 0; row < NROW; row++) {
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*row_ddr[row] &= ~row_bit[row];
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*row_port[row] &= ~row_bit[row];
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}
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}
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static
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void setup_leds(void) {
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DDRB |= 0x60;
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PORTB |= 0x60;
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}
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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// initialize row and col
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setup_io_pins();
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setup_leds();
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
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for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
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matrix = _matrix0;
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matrix_debounced = _matrix1;
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}
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uint8_t matrix_scan(void)
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{
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if (!debouncing) {
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uint8_t *tmp = matrix_debounced;
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matrix_debounced = matrix;
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matrix = tmp;
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}
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for (uint8_t col = 0; col < NCOL; col++) { // 0-7
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pull_column(col); // output hi on theline
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_delay_us(1); // without this wait it won't read stable value.
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for (uint8_t row = 0; row < NROW; row++) { // 0-17
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bool prev_bit = matrix[row] & (1<<col);
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bool curr_bit = *row_pin[row] & row_bit[row];
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if (prev_bit != curr_bit) {
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matrix[row] ^= (1<<col);
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); print("\n");
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}
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debouncing = DEBOUNCE;
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}
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}
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release_column(col);
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}
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if (debouncing) {
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debouncing--;
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}
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return 1;
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}
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bool matrix_is_modified(void)
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{
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// NOTE: no longer used
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return true;
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}
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inline
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bool matrix_has_ghost(void)
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{
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return false;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix_debounced[row] & (1<<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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return matrix_debounced[row];
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}
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void matrix_print(void)
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{
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print("\nr/c 01234567\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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pbin_reverse(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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for (uint8_t j = 0; j < MATRIX_COLS; j++) {
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if (matrix_is_on(i, j))
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count++;
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}
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}
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return count;
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}
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