mraa  1.7.0
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  }
63  Aio(void* aio_context)
64  {
65  m_aio = (mraa_aio_context) aio_context;
66  if (m_aio == NULL) {
67  throw std::invalid_argument("Invalid AIO context");
68  }
69  }
73  ~Aio()
74  {
75  mraa_aio_close(m_aio);
76  }
84  unsigned int
85  read()
86  {
87  int x = mraa_aio_read(m_aio);
88  if (x == -1) {
89  throw std::invalid_argument("Unknown error in Aio::read()");
90  }
91  return (unsigned int) x;
92  }
99  float
101  {
102  float x = mraa_aio_read_float(m_aio);
103  if (x == -1.0f) {
104  throw std::invalid_argument("Unknown error in Aio::readFloat()");
105  }
106  return x;
107  }
114  Result
115  setBit(int bits)
116  {
117  return (Result) mraa_aio_set_bit(m_aio, bits);
118  }
124  int
126  {
127  return mraa_aio_get_bit(m_aio);
128  }
129 
130  private:
131  mraa_aio_context m_aio;
132 };
133 }
Result
Definition: types.hpp:199
mraa_result_t mraa_aio_close(mraa_aio_context dev)
int getBit()
Definition: aio.hpp:125
Aio(void *aio_context)
Definition: aio.hpp:63
API to Analog IO.
Definition: aio.hpp:41
int mraa_aio_get_bit(mraa_aio_context dev)
unsigned int read()
Definition: aio.hpp:85
struct _aio * mraa_aio_context
Definition: aio.h:51
float readFloat()
Definition: aio.hpp:100
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:115
~Aio()
Definition: aio.hpp:73
int mraa_aio_read(mraa_aio_context dev)