diff options
Diffstat (limited to 'include/keypad.h')
| -rw-r--r-- | include/keypad.h | 28 |
1 files changed, 6 insertions, 22 deletions
diff --git a/include/keypad.h b/include/keypad.h index 2e5fa9c..3dbebdf 100644 --- a/include/keypad.h +++ b/include/keypad.h @@ -23,34 +23,18 @@ #include <stdint.h> -#define K0 (uint16_t)(1 << 0) -#define K1 (uint16_t)(1 << 1) -#define K2 (uint16_t)(1 << 2) -#define K3 (uint16_t)(1 << 3) -#define K4 (uint16_t)(1 << 4) -#define K5 (uint16_t)(1 << 5) -#define K6 (uint16_t)(1 << 6) -#define K7 (uint16_t)(1 << 7) -#define K8 (uint16_t)(1 << 8) -#define K9 (uint16_t)(1 << 9) -#define KS (uint16_t)(1 << 10) -#define KP (uint16_t)(1 << 11) - /** - * Initializes GPIO for the keypad. Must be called before any keypad reading. + * Initializes GPIO for the keypad. + * Starts a task to poll the buttons. Must be called before any keypad reading. */ void keypad_init(void); /** - * Reads the state of the keypad and returns it. - * @return the keypad's state + * Reads the last pressed key on the keypad. + * This driver keeps an 8 key buffer for key presses. + * @return the pressed key (as the character it represents), zero if no presses */ -uint16_t keypad_get(void); +int keypad_get(void); -/** - * Tests if the given key is currently pressed, returning non-zero if it is. - * @return non-zero if pressed - */ -uint8_t keypad_isdown(uint16_t); #endif // KEYPAD_H_ |