205 lines
4.8 KiB
C
205 lines
4.8 KiB
C
/*
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Copyright 2014 Kai Ryu <kai1103@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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/*
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* scan matrix
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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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#ifdef UART_RGB_ENABLE
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#include "uart_rgb.h"
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#endif
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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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/* 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 matrix_row_t read_cols(void);
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static void init_cols(void);
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static void init_rows(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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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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#ifdef UART_RGB_ENABLE
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uart_rgb_init();
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#endif
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// 85 REST
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gpio_set_pin_output(D7);
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gpio_write_pin_high(D7);
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// initialize row and col
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init_rows();
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init_cols();
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// initialize matrix state: all keys off
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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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}
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uint8_t matrix_scan(void)
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{
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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select_row(i);
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_delay_us(30); // without this wait read unstable value.
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matrix_row_t cols = read_cols();
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if (matrix_debouncing[i] != cols) {
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matrix_debouncing[i] = cols;
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if (debouncing) {
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dprintf("bounce!: %02X\n", debouncing);
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}
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debouncing = DEBOUNCE;
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}
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unselect_rows();
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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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return 1;
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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[row] & ((matrix_row_t)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[row];
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}
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void matrix_print(void)
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{
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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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print_hex8(row); print(": ");
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print_bin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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/* Column pin configuration
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* col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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* pin: F7 F6 F5 F4 F1 F0 E6 D7 D6 D5 D1 D0 B7 B6 B0 C7
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* */
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static void init_cols(void)
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{
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// Input with pull-up(DDR:0, PORT:1)
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DDRF &= 0b00001100;
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PORTF |= 0b11110011;
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DDRD &= 0b00011100;
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PORTD |= 0b11100011;
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gpio_set_pin_input_high(B0);
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gpio_set_pin_input_high(B6);
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gpio_set_pin_input_high(B7);
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gpio_set_pin_input_high(E6);
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gpio_set_pin_input_high(C7);
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}
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static matrix_row_t read_cols(void)
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{
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return (gpio_read_pin(F7) ? 0 : (1<<0)) |
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(gpio_read_pin(F6) ? 0 : (1<<1)) |
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(gpio_read_pin(F5) ? 0 : (1<<2)) |
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(gpio_read_pin(F4) ? 0 : (1<<3)) |
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(gpio_read_pin(F1) ? 0 : (1<<4)) |
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(gpio_read_pin(F0) ? 0 : (1<<5)) |
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(gpio_read_pin(E6) ? 0 : (1<<6)) |
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(gpio_read_pin(D7) ? 0 : (1<<7)) |
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(gpio_read_pin(D6) ? 0 : (1<<8)) |
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(gpio_read_pin(D5) ? 0 : (1<<9)) |
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(gpio_read_pin(D1) ? 0 : (1<<10)) |
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(gpio_read_pin(D0) ? 0 : (1<<11)) |
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(gpio_read_pin(B7) ? 0 : (1<<12)) |
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(gpio_read_pin(B6) ? 0 : (1<<13)) |
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(gpio_read_pin(B0) ? 0 : (1<<14)) |
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(gpio_read_pin(C7) ? 0 : (1<<15));
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}
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/* Row pin configuration
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* row: 0 1 2 3 4 5 x
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* pin: B3 0 1 0 1 0 1 1
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* B2 0 0 1 1 0 0 1
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* B1 0 0 0 0 1 1 1
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*/
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static void init_rows(void)
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{
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gpio_set_pin_input(B1);
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gpio_set_pin_input(B2);
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gpio_set_pin_input(B3);
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}
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static void unselect_rows(void)
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{
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// Hi-Z(DDR:0, PORT:0) to unselect
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gpio_write_pin_high(B1);
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gpio_write_pin_high(B2);
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gpio_write_pin_high(B3);
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}
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static void select_row(uint8_t row)
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{
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// Output low(DDR:1, PORT:0) to select
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gpio_write_pin(B3, row & (1<<0));
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gpio_write_pin(B2, row & (1<<1));
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gpio_write_pin(B1, row & (1<<2));
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}
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