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Diffstat (limited to 'm0110_usb/matrix.c')
| -rw-r--r-- | m0110_usb/matrix.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/m0110_usb/matrix.c b/m0110_usb/matrix.c new file mode 100644 index 000000000..f045920cc --- /dev/null +++ b/m0110_usb/matrix.c @@ -0,0 +1,193 @@ +/* +Copyright 2011 Jun Wako <wakojun@gmail.com> + +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 "util.h" +#include "debug.h" +#include "host.h" +#include "led.h" +#include "m0110.h" +#include "matrix.h" + + +#define CAPS 0x39 +#define CAPS_UP (CAPS | 0x80) +#define ROW(key) ((key)>>3&0x0F) +#define COL(key) ((key)&0x07) + + +static bool is_modified = false; + +// matrix state buffer(1:on, 0:off) +static uint8_t *matrix; +static uint8_t _matrix0[MATRIX_ROWS]; + +#ifdef MATRIX_HAS_GHOST +static bool matrix_has_ghost_in_row(uint8_t row); +#endif +static void register_key(uint8_t key); + + +inline +uint8_t matrix_rows(void) +{ + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) +{ + return MATRIX_COLS; +} + +void matrix_init(void) +{ + print_enable = true; + debug_enable = true; + debug_matrix = false; + debug_keyboard = false; + debug_mouse = false; + print("debug enabled.\n"); + + m0110_init(); + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00; + matrix = _matrix0; + return; +} + +uint8_t matrix_scan(void) +{ + uint8_t key; + + is_modified = false; + key = m0110_recv_key(); + +#ifdef MATRIX_HAS_LOCKING_CAPS + // Send Caps key up event + if (matrix_is_on(ROW(CAPS), COL(CAPS))) { + is_modified = true; + register_key(CAPS_UP); + } +#endif + if (key == M0110_NULL) { + return 0; + } else { +#ifdef MATRIX_HAS_LOCKING_CAPS + if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) { + // CAPS LOCK on: + // Ignore LockingCaps key down event + if (key == CAPS) return 0; + // Convert LockingCaps key up event into down event + if (key == CAPS_UP) key = CAPS; + } else { + // CAPS LOCK off: + // Ignore LockingCaps key up event + if (key == CAPS_UP) return 0; + } +#endif + is_modified = true; + register_key(key); + } + + if (debug_enable) { + print("key: "); phex(key); print("\n"); + } + return 1; +} + +bool matrix_is_modified(void) +{ + return is_modified; +} + +inline +bool matrix_has_ghost(void) +{ +#ifdef MATRIX_HAS_GHOST + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + if (matrix_has_ghost_in_row(i)) + return true; + } +#endif + return false; +} + +inline +bool matrix_is_on(uint8_t row, uint8_t col) +{ + return (matrix[row] & (1<<col)); +} + +inline +uint8_t matrix_get_row(uint8_t row) +{ + return matrix[row]; +} + +void matrix_print(void) +{ + print("\nr/c 01234567\n"); + for (uint8_t row = 0; row < matrix_rows(); row++) { + phex(row); print(": "); + pbin_reverse(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 += bitpop(matrix[i]); + } + return count; +} + +#ifdef MATRIX_HAS_GHOST +inline +static bool matrix_has_ghost_in_row(uint8_t row) +{ + // no ghost exists in case less than 2 keys on + if (((matrix[row] - 1) & matrix[row]) == 0) + return false; + + // ghost exists in case same state as other row + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + if (i != row && (matrix[i] & matrix[row]) == matrix[row]) + return true; + } + return false; +} +#endif + +inline +static void register_key(uint8_t key) +{ + if (key&0x80) { + matrix[ROW(key)] &= ~(1<<COL(key)); + } else { + matrix[ROW(key)] |= (1<<COL(key)); + } +} |