/* Copyright 2011,2012,2013 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/>. */ #ifndef KEYBOARD_H #define KEYBOARD_H #include <stdbool.h> #include <stdint.h> #ifdef __cplusplus extern "C" { #endif /* key matrix position */ typedef struct { uint8_t col; uint8_t row; } keypos_t; /* key event */ typedef struct { keypos_t key; bool pressed; uint16_t time; } keyevent_t; /* equivalent test of keypos_t */ #define KEYEQ(keya, keyb) ((keya).row == (keyb).row && (keya).col == (keyb).col) /* Rules for No Event: * 1) (time == 0) to handle (keyevent_t){} as empty event * 2) Matrix(255, 255) to make TICK event available */ static inline bool IS_NOEVENT(keyevent_t event) { return event.time == 0 || (event.key.row == 255 && event.key.col == 255); } static inline bool IS_PRESSED(keyevent_t event) { return (!IS_NOEVENT(event) && event.pressed); } static inline bool IS_RELEASED(keyevent_t event) { return (!IS_NOEVENT(event) && !event.pressed); } /* Tick event */ #define TICK (keyevent_t){ \ .key = (keypos_t){ .row = 255, .col = 255 }, \ .pressed = false, \ .time = (timer_read() | 1) \ } /* it runs once at early stage of startup before keyboard_init. */ void keyboard_setup(void); /* it runs once after initializing host side protocol, debug and MCU peripherals. */ void keyboard_init(void); /* it runs repeatedly in main loop */ void keyboard_task(void); /* it runs when host LED status is updated */ void keyboard_set_leds(uint8_t leds); #ifdef __cplusplus } #endif #endif