upm  1.7.1
Sensor/Actuator repository for libmraa (v2.0.0)
rotaryencoder.h
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1 /*
2  * Author: Jon Trulson <jtrulson@ics.com>
3  * Copyright (c) 2016 Intel Corporation.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be
14  * included in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  */
24 #pragma once
25 
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <upm.h>
29 
30 #include <mraa/gpio.h>
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
47  typedef struct _rotaryencoder_context {
48  mraa_gpio_context gpioA;
49  mraa_gpio_context gpioB;
50 
51  volatile int position;
53 
60  rotaryencoder_context rotaryencoder_init(int pin_a, int pin_b);
61 
66 
73  int count);
74 
80 
81 
82 #ifdef __cplusplus
83 }
84 #endif
struct _rotaryencoder_context * rotaryencoder_context
rotaryencoder_context rotaryencoder_init(int pin_a, int pin_b)
Definition: rotaryencoder.c:45
void rotaryencoder_close(rotaryencoder_context dev)
Definition: rotaryencoder.c:104
int rotaryencoder_get_position(const rotaryencoder_context dev)
Definition: rotaryencoder.c:127
void rotaryencoder_set_position(const rotaryencoder_context dev, int count)
Definition: rotaryencoder.c:120
Definition: rotaryencoder.h:47