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Diffstat (limited to 'keyboard/lightpad/matrix.c')
| -rw-r--r-- | keyboard/lightpad/matrix.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/keyboard/lightpad/matrix.c b/keyboard/lightpad/matrix.c new file mode 100644 index 0000000000..87d338395b --- /dev/null +++ b/keyboard/lightpad/matrix.c @@ -0,0 +1,205 @@ +/* +Copyright 2014 Ralf Schmitt <ralf@bunkertor.net> + +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 "eeconfig.h" +#include "action_layer.h" +#include "backlight.h" + +#ifndef DEBOUNCE +# define DEBOUNCE 0 +#endif +static uint8_t debouncing = DEBOUNCE; + +static matrix_row_t matrix[MATRIX_ROWS]; +static matrix_row_t matrix_debouncing[MATRIX_ROWS]; + +static uint8_t read_rows(void); +static uint8_t read_fwkey(void); +static void init_rows(void); +static void unselect_cols(void); +static void select_col(uint8_t col); + +inline +uint8_t matrix_rows(void) +{ + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) +{ + return MATRIX_COLS; +} + +void misc_init(void) { +} + +void matrix_init(void) +{ + backlight_init_ports(); + unselect_cols(); + init_rows(); + 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++) { + select_col(col); + _delay_us(3); + uint8_t rows = read_rows(); + // Use the otherwise unused col: 0 row: 0 for firmware key + if(col == 0) { + rows |= read_fwkey(); + } + 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; + } + } + unselect_cols(); + } + + 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++) { + xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row))); + } +} + +uint8_t matrix_key_count(void) +{ + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + count += bitpop32(matrix[i]); + } + return count; +} + +/* Row configuration + * + * row: 0 1 2 3 4 5 + * pin: PD0 PD1 PD2 PD3 PD5 PB7 + * + * Firmware uses pin PE2 + */ +static void init_rows(void) +{ + DDRD &= ~0b00101111; + PORTD |= 0b00101111; + + DDRB &= ~0b10000000; + PORTB |= 0b10000000; + + DDRE &= ~0b00000100; + PORTE |= 0b00000100; +} + +static uint8_t read_rows(void) +{ + return (PIND&(1<<0) ? (1<<0) : 0) | + (PIND&(1<<1) ? (1<<1) : 0) | + (PIND&(1<<2) ? (1<<2) : 0) | + (PIND&(1<<3) ? (1<<3) : 0) | + (PIND&(1<<5) ? (1<<4) : 0) | + (PINB&(1<<7) ? (1<<5) : 0); +} + +static uint8_t read_fwkey(void) +{ + return PINE&(1<<2) ? 0 : (1<<0); +} + +/* Column configuration + * + * col: 0 1 2 3 + * pin: PF0 PF1 PC7 PC6 + */ +static void unselect_cols(void) +{ + DDRF |= 0b00000011; + PORTF &= ~0b00000011; + DDRC |= 0b11000000; + PORTC &= ~0b11000000; +} + +static void select_col(uint8_t col) +{ + switch (col) { + case 0: + PORTF |= (1<<0); + break; + case 1: + PORTF |= (1<<1); + break; + case 2: + PORTC |= (1<<7); + break; + case 3: + PORTC |= (1<<6); + break; + } +} |