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 #include <stdio.h>
26 #include <unistd.h>
27 #include <errno.h>
28 #include <signal.h>
29 #include <stdlib.h>
30
31 #include "mraa.h"
32
33 #define DEFAULT_IOPIN 8
34
35 int running = 0;
36 static int iopin;
37
38 void
sig_handler(int signo)39 sig_handler(int signo)
40 {
41 if (signo == SIGINT) {
42 printf("closing IO%d nicely\n", iopin);
43 running = -1;
44 }
45 }
46
47 int
main(int argc,char ** argv)48 main(int argc, char** argv)
49 {
50 mraa_result_t r = MRAA_SUCCESS;
51 iopin = DEFAULT_IOPIN;
52
53 if (argc < 2) {
54 printf("Provide an int arg if you want to flash on something other than %d\n", DEFAULT_IOPIN);
55 } else {
56 iopin = strtol(argv[1], NULL, 10);
57 }
58
59 mraa_init();
60 fprintf(stdout, "MRAA Version: %s\nStarting Blinking on IO%d\n", mraa_get_version(), iopin);
61
62 mraa_gpio_context gpio;
63 gpio = mraa_gpio_init(iopin);
64 if (gpio == NULL) {
65 fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", iopin);
66 exit(1);
67 }
68 printf("Initialised pin%d\n", iopin);
69
70 // set direction to OUT
71 r = mraa_gpio_dir(gpio, MRAA_GPIO_OUT);
72 if (r != MRAA_SUCCESS) {
73 mraa_result_print(r);
74 }
75
76 signal(SIGINT, sig_handler);
77
78 while (running == 0) {
79 r = mraa_gpio_write(gpio, 0);
80 if (r != MRAA_SUCCESS) {
81 mraa_result_print(r);
82 } else {
83 printf("off\n");
84 }
85
86 sleep(1);
87
88 r = mraa_gpio_write(gpio, 1);
89 if (r != MRAA_SUCCESS) {
90 mraa_result_print(r);
91 } else {
92 printf("on\n");
93 }
94
95 sleep(1);
96 }
97
98 r = mraa_gpio_close(gpio);
99 if (r != MRAA_SUCCESS) {
100 mraa_result_print(r);
101 }
102
103 return r;
104 }
105