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
31 int running = 0;
32
33 void
sig_handler(int signo)34 sig_handler(int signo)
35 {
36 if (signo == SIGINT) {
37 printf("closing spi nicely\n");
38 running = -1;
39 }
40 }
41
42 int
main()43 main()
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