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