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/* |
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Copyright 2012 Jun Wako |
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Generated by planckkeyboard.com (2014 Jack Humbert) |
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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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#ifndef DEBOUNCE |
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# define DEBOUNCE 10 |
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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 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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// initialize row and col |
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unselect_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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debug("bounce!: "); debug_hex(debouncing); debug("\n"); |
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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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bool matrix_is_modified(void) |
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{ |
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if (debouncing) return false; |
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return true; |
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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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phex(row); print(": "); |
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pbin_reverse16(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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count += bitpop16(matrix[i]); |
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} |
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return count; |
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} |
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static void init_cols(void) |
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{ |
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DDRB &= ~(1<<6 | 1<<5 | 1<<4); |
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PORTB |= (1<<6 | 1<<5 | 1<<4); |
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DDRD &= ~(1<<7 | 1<<6 | 1<<4); |
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PORTD |= (1<<7 | 1<<6 | 1<<4); |
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DDRF &= ~(1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7); |
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PORTF |= (1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7); |
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} |
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static matrix_row_t read_cols(void) |
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{ |
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return (PIND&(1<<4) ? 0 : (1<<0)) | |
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(PIND&(1<<6) ? 0 : (1<<1)) | |
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(PIND&(1<<7) ? 0 : (1<<2)) | |
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(PINB&(1<<4) ? 0 : (1<<3)) | |
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(PINB&(1<<5) ? 0 : (1<<4)) | |
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(PINB&(1<<6) ? 0 : (1<<5)) | |
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(PINF&(1<<7) ? 0 : (1<<6)) | |
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(PINF&(1<<6) ? 0 : (1<<7)) | |
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(PINF&(1<<5) ? 0 : (1<<8)) | |
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(PINF&(1<<4) ? 0 : (1<<9)) | |
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(PINF&(1<<1) ? 0 : (1<<10)) | |
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(PINF&(1<<0) ? 0 : (1<<11)); |
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} |
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static void unselect_rows(void) |
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{ |
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DDRB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3); |
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PORTB |= (1<<0 | 1<<1 | 1<<2 | 1<<3); |
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} |
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static void select_row(uint8_t row) |
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{ |
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switch (row) { |
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case 0: |
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DDRB |= (1<<0); |
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PORTB &= ~(1<<0); |
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break; |
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case 1: |
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DDRB |= (1<<1); |
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PORTB &= ~(1<<1); |
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break; |
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case 2: |
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DDRB |= (1<<2); |
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PORTB &= ~(1<<2); |
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break; |
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case 3: |
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DDRB |= (1<<3); |
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PORTB &= ~(1<<3); |
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break; |
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} |
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} |