mraa  1.8.0
Low Level Skeleton Library for Communication on GNU/Linux platforms
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aio.hpp
1 /*
2  * Author: Brendan Le Foll <brendan.le.foll@intel.com>
3  * Copyright (c) 2014 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 
25 #pragma once
26 
27 #include <stdexcept>
28 #include "aio.h"
29 #include "types.hpp"
30 
31 namespace mraa
32 {
33 
41 class Aio
42 {
43  public:
50  Aio(int pin)
51  {
52  m_aio = mraa_aio_init(pin);
53  if (m_aio == NULL) {
54  throw std::invalid_argument("Invalid AIO pin specified - do you have an ADC?");
55  }
56  }
65  Aio(void* aio_context)
66  {
67  m_aio = (mraa_aio_context) aio_context;
68  if (m_aio == NULL) {
69  throw std::invalid_argument("Invalid AIO context");
70  }
71  }
75  ~Aio()
76  {
77  mraa_aio_close(m_aio);
78  }
86  unsigned int
87  read()
88  {
89  int x = mraa_aio_read(m_aio);
90  if (x == -1) {
91  throw std::invalid_argument("Unknown error in Aio::read()");
92  }
93  return (unsigned int) x;
94  }
101  float
103  {
104  float x = mraa_aio_read_float(m_aio);
105  if (x == -1.0f) {
106  throw std::invalid_argument("Unknown error in Aio::readFloat()");
107  }
108  return x;
109  }
116  Result
117  setBit(int bits)
118  {
119  return (Result) mraa_aio_set_bit(m_aio, bits);
120  }
126  int
128  {
129  return mraa_aio_get_bit(m_aio);
130  }
131 
132  private:
133  mraa_aio_context m_aio;
134 };
135 }
Result
Definition: types.hpp:200
mraa_result_t mraa_aio_close(mraa_aio_context dev)
int getBit()
Definition: aio.hpp:127
Aio(void *aio_context)
Definition: aio.hpp:65
API to Analog IO.
Definition: aio.hpp:41
int mraa_aio_get_bit(mraa_aio_context dev)
unsigned int read()
Definition: aio.hpp:87
struct _aio * mraa_aio_context
Definition: aio.h:51
float readFloat()
Definition: aio.hpp:102
Aio(int pin)
Definition: aio.hpp:50
float mraa_aio_read_float(mraa_aio_context dev)
mraa_result_t mraa_aio_set_bit(mraa_aio_context dev, int bits)
mraa_aio_context mraa_aio_init(unsigned int pin)
Analog input/output.
Result setBit(int bits)
Definition: aio.hpp:117
~Aio()
Definition: aio.hpp:75
int mraa_aio_read(mraa_aio_context dev)