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 <string.h>
27 #include <unistd.h>
28
29 #include "mraa/gpio.h"
30
31 int
main(int argc,char ** argv)32 main(int argc, char** argv)
33 {
34 mraa_platform_t platform = mraa_get_platform_type();
35 mraa_gpio_context gpio, gpio_in = NULL;
36 const char* board_name = mraa_get_platform_name();
37 int ledstate = 0;
38
39 switch (platform) {
40 case MRAA_INTEL_GALILEO_GEN1:
41 gpio = mraa_gpio_init_raw(3);
42 break;
43 case MRAA_INTEL_MINNOWBOARD_MAX:
44 // there is no onboard LED that we can flash on the minnowboard max
45 // but on the calamari lure pin 21 is an LED. If you don't have the
46 // lure put an LED on pin 21
47 gpio = mraa_gpio_init(21);
48 break;
49 default:
50 gpio = mraa_gpio_init(13);
51 }
52
53 fprintf(stdout, "Welcome to libmraa\n Version: %s\n Running on %s\n", mraa_get_version(), board_name);
54
55
56 if (gpio == NULL) {
57 fprintf(stdout, "Could not initilaize gpio\n");
58 return 1;
59 }
60
61 // on platforms with physical button use gpio_in
62 if (platform == MRAA_INTEL_MINNOWBOARD_MAX) {
63 gpio_in = mraa_gpio_init(14);
64 if (gpio_in != NULL) {
65 mraa_gpio_dir(gpio_in, MRAA_GPIO_IN);
66 // S1 on minnowboardmax's calamari lure maps to pin 14, SW1 != S1
67 fprintf(stdout, "Press and hold S1 to stop, Press SW1 to shutdown!\n");
68 }
69 }
70
71 mraa_gpio_dir(gpio, MRAA_GPIO_OUT);
72
73 for (;;) {
74 if (gpio_in != NULL && mraa_gpio_read(gpio_in) == 0) {
75 return 0;
76 }
77 ledstate = !ledstate;
78 mraa_gpio_write(gpio, !ledstate);
79 sleep(1);
80 }
81
82 return 0;
83 }
84