1/*
2 * Author: Thomas Ingleby <thomas.c.ingleby@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#include <unistd.h>
26#include <signal.h>
27#include <stdint.h>
28
29#include "mraa.hpp"
30
31int running = 0;
32
33void
34sig_handler(int signo)
35{
36    if (signo == SIGINT) {
37        printf("closing spi nicely\n");
38        running = -1;
39    }
40}
41
42int
43main()
44{
45    signal(SIGINT, sig_handler);
46
47    //! [Interesting]
48    mraa::Spi* spi;
49
50    spi = new mraa::Spi(0);
51
52    uint8_t data[] = { 0x00, 100 };
53    uint8_t rxBuf[2];
54    uint8_t* recv;
55    while (running == 0) {
56        int i;
57        for (i = 90; i < 130; i++) {
58            data[1] = i;
59            recv = spi->write(data, 2);
60            printf("Writing -%i", i);
61            if (recv) {
62                printf("RECIVED-%i-%i\n", recv[0], recv[1]);
63                free(recv);
64            }
65            usleep(100000);
66        }
67        for (i = 130; i > 90; i--) {
68            data[1] = i;
69            if (spi->transfer(data, rxBuf, 2) == mraa::SUCCESS) {
70                printf("Writing -%i", i);
71                printf("RECIVED-%i-%i\n", rxBuf[0], rxBuf[1]);
72            }
73            usleep(100000);
74        }
75    }
76    delete spi;
77    //! [Interesting]
78
79    return mraa::SUCCESS;
80}
81