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Diffstat (limited to 'keyboard/preonic/matrix.c')
| -rw-r--r-- | keyboard/preonic/matrix.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/keyboard/preonic/matrix.c b/keyboard/preonic/matrix.c new file mode 100644 index 0000000000..98ef55ed68 --- /dev/null +++ b/keyboard/preonic/matrix.c @@ -0,0 +1,234 @@ +/* +Copyright 2012 Jun Wako +Generated by planckkeyboard.com (2014 Jack Humbert) + +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/>. +*/ + +/* + * scan matrix + */ +#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" + +#ifndef DEBOUNCE +# define DEBOUNCE 10 +#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 matrix_row_t read_cols(void); +static void init_cols(void); +static void unselect_rows(void); +static void select_row(uint8_t row); + +inline +uint8_t matrix_rows(void) +{ + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) +{ + return MATRIX_COLS; +} + +void matrix_init(void) +{ + // To use PORTF disable JTAG with writing JTD bit twice within four cycles. + MCUCR |= (1<<JTD); + MCUCR |= (1<<JTD); + + backlight_init_ports(); + + // Turn status LED on + DDRE |= (1<<6); + PORTE |= (1<<6); + + // initialize row and col + unselect_rows(); + init_cols(); + + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + matrix[i] = 0; + matrix_debouncing[i] = 0; + } +} + + +uint8_t matrix_scan(void) +{ + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + select_row(i); + _delay_us(30); // without this wait read unstable value. + matrix_row_t cols = read_cols(); + if (matrix_debouncing[i] != cols) { + matrix_debouncing[i] = cols; + if (debouncing) { + debug("bounce!: "); debug_hex(debouncing); debug("\n"); + } + debouncing = DEBOUNCE; + } + unselect_rows(); + } + + 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_cols(void) +{ + int B = 0, C = 0, D = 0, E = 0, F = 0; + for(int x = 0; x < MATRIX_COLS; x++) { + int col = COLS[x]; + if ((col & 0xF0) == 0x20) { + B |= (1<<(col & 0x0F)); + } else if ((col & 0xF0) == 0x30) { + C |= (1<<(col & 0x0F)); + } else if ((col & 0xF0) == 0x40) { + D |= (1<<(col & 0x0F)); + } else if ((col & 0xF0) == 0x50) { + E |= (1<<(col & 0x0F)); + } else if ((col & 0xF0) == 0x60) { + F |= (1<<(col & 0x0F)); + } + } + DDRB &= ~(B); PORTB |= (B); + DDRC &= ~(C); PORTC |= (C); + DDRD &= ~(D); PORTD |= (D); + DDRE &= ~(E); PORTE |= (E); + DDRF &= ~(F); PORTF |= (F); +} + +static matrix_row_t read_cols(void) +{ + matrix_row_t result = 0; + for(int x = 0; x < MATRIX_COLS; x++) { + int col = COLS[x]; + if ((col & 0xF0) == 0x20) { + result |= (PINB&(1<<(col & 0x0F)) ? 0 : (1<<x)); + } else if ((col & 0xF0) == 0x30) { + result |= (PINC&(1<<(col & 0x0F)) ? 0 : (1<<x)); + } else if ((col & 0xF0) == 0x40) { + result |= (PIND&(1<<(col & 0x0F)) ? 0 : (1<<x)); + } else if ((col & 0xF0) == 0x50) { + result |= (PINE&(1<<(col & 0x0F)) ? 0 : (1<<x)); + } else if ((col & 0xF0) == 0x60) { + result |= (PINF&(1<<(col & 0x0F)) ? 0 : (1<<x)); + } + } + return result; +} + +static void unselect_rows(void) +{ + int B = 0, C = 0, D = 0, E = 0, F = 0; + for(int x = 0; x < MATRIX_ROWS; x++) { + int row = ROWS[x]; + if ((row & 0xF0) == 0x20) { + B |= (1<<(row & 0x0F)); + } else if ((row & 0xF0) == 0x30) { + C |= (1<<(row & 0x0F)); + } else if ((row & 0xF0) == 0x40) { + D |= (1<<(row & 0x0F)); + } else if ((row & 0xF0) == 0x50) { + E |= (1<<(row & 0x0F)); + } else if ((row & 0xF0) == 0x60) { + F |= (1<<(row & 0x0F)); + } + } + DDRB &= ~(B); PORTB |= (B); + DDRC &= ~(C); PORTC |= (C); + DDRD &= ~(D); PORTD |= (D); + DDRE &= ~(E); PORTE |= (E); + DDRF &= ~(F); PORTF |= (F); +} + +static void select_row(uint8_t row) +{ + int row_pin = ROWS[row]; + if ((row_pin & 0xF0) == 0x20) { + DDRB |= (1<<(row_pin & 0x0F)); + PORTB &= ~(1<<(row_pin & 0x0F)); + } else if ((row_pin & 0xF0) == 0x30) { + DDRC |= (1<<(row_pin & 0x0F)); + PORTC &= ~(1<<(row_pin & 0x0F)); + } else if ((row_pin & 0xF0) == 0x40) { + DDRD |= (1<<(row_pin & 0x0F)); + PORTD &= ~(1<<(row_pin & 0x0F)); + } else if ((row_pin & 0xF0) == 0x50) { + DDRE |= (1<<(row_pin & 0x0F)); + PORTE &= ~(1<<(row_pin & 0x0F)); + } else if ((row_pin & 0xF0) == 0x60) { + DDRF |= (1<<(row_pin & 0x0F)); + PORTF &= ~(1<<(row_pin & 0x0F)); + } +}
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