You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/**
|
|
* @file keypad.h
|
|
* Manages the GPIO keypad
|
|
*
|
|
* Copyright (C) 2018 Clyne Sullivan
|
|
*
|
|
* 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 3 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 <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef KEYPAD_H_
|
|
#define KEYPAD_H_
|
|
|
|
#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.
|
|
*/
|
|
void keypad_init(void);
|
|
|
|
/**
|
|
* Reads the state of the keypad and returns it.
|
|
* @return the keypad's state
|
|
*/
|
|
uint16_t 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_
|