1 /*
2  * Author: Brendan Le Foll <brendan.le.foll@intel.com>
3  * Author: Petre Eftime <petre.p.eftime@intel.com>
4  * Copyright (c) 2015 Intel Corporation.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining
7  * a copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sublicense, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be
15  * included in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  */
25 
26 //! [Interesting]
27 import mraa.Dir;
28 import mraa.Gpio;
29 import mraa.IntelEdison;
30 import mraa.mraa;
31 import mraa.Platform;
32 import mraa.Result;
33 
34 public class HelloEdison {
35   static {
36     try {
37       System.loadLibrary("mraajava");
38     } catch (UnsatisfiedLinkError e) {
39       System.err.println(
40           "Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" +
41           e);
42       System.exit(1);
43     }
44   }
main(String argv[])45   public static void main(String argv[]) {
46     Platform platform = mraa.getPlatformType();
47 
48     if (platform != Platform.INTEL_EDISON_FAB_C) {
49         System.err.println("Error: This program can only be run on edison");
50         System.exit(Result.ERROR_INVALID_PLATFORM.swigValue());
51     }
52 
53     /*
54      * MRAA_INTEL_EDISON_GP182 == 0, so this will initialise pin0 on arduino,
55      * which is hardware GPIO 130 and not 182
56      * We set the owner to false here, this makes sure that we do not close the
57      * gpio from sysfs in mraa_gpio_close meaning it will stay as an output and
58      * we will not always transition from 0->1 as gpio182 as output has the
59      * default position of '0'. Note that the value could change as a result of
60      * a mraa_gpio_dir however meaning we always go from 0->1 or 1->0
61      */
62     Gpio gpio182 = new Gpio(IntelEdison.INTEL_EDISON_GP182.swigValue(), false);
63     gpio182.dir(Dir.DIR_OUT);
64 
65     int val = gpio182.read();
66 
67     System.out.println(String.format("GPIO%d (mraa pin %d) was: %d, will set to %d\n", 182,
68             gpio182.getPin(), val, val == 0 ? 1 : 0));
69 
70     gpio182.write(val == 0 ? 1 : 0);
71   };
72 }
73 //! [Interesting]
74