1/*
2 * Author: Michael Ring <mail@michael-ring.org>
3 * Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
4 * Copyright (c) 2014 Intel Corporation.
5 * Author: Petre Eftime <petre.p.eftime@intel.com>
6 * Copyright (c) 2015 Intel Corporation.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining
9 * a copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sublicense, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be
17 * included in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28import java.nio.ByteBuffer;
29import mraa.Result;
30import mraa.Spi;
31
32public class SpiMAX7219 {
33    static {
34        try {
35            System.loadLibrary("mraajava");
36        } catch (UnsatisfiedLinkError e) {
37            System.err.println(
38                    "Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" +
39                            e);
40            System.exit(1);
41        }
42    }
43    public static void main(String argv[]) throws InterruptedException {
44        //! [Interesting]
45        Spi spi = new Spi(1);
46
47        spi.frequency(400000);
48        spi.lsbmode(false);
49
50        if(spi.bitPerWord(16) != Result.SUCCESS) {
51            System.err.println("Could not set SPI Device to 16Bit mode, exit...");
52            System.exit(1);
53        }
54
55        spi.write_word(0x0900); //Do not decode bits
56        spi.write_word(0x0a05); // Brightness of LEDs
57        spi.write_word(0x0b07); // Show all Scan Lines
58        spi.write_word(0x0c01); // Display on
59        spi.write_word(0x0f00); // Testmode off
60
61        short dataAA55[] = { 0x01aa, 0x0255, 0x03aa, 0x0455, 0x05aa, 0x0655, 0x07aa, 0x0855 };
62        ByteBuffer buf = ByteBuffer.allocate(dataAA55.length * 2);
63        for (int i = 0; i < dataAA55.length; i++)
64            buf.putShort(dataAA55[i]);
65
66        spi.write(buf.array());
67        Thread.sleep(2000);
68
69        short data55AA[] = { 0x0155, 0x02aa, 0x0355, 0x04aa, 0x0555, 0x06aa, 0x0755, 0x08aa };
70        buf = ByteBuffer.allocate(data55AA.length * 2);
71        for (int i = 0; i < data55AA.length; i++)
72            buf.putShort(data55AA[i]);
73
74        spi.write(buf.array());
75        Thread.sleep(2000);
76
77        short data[] = { 0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600, 0x0700, 0x0800 };
78        buf = ByteBuffer.allocate(data.length * 2);
79        for (int i = 0; i < data.length; i++)
80            buf.putShort(data[i]);
81
82        spi.write(buf.array());
83
84        for (int i = 1; i <= 8; i++) {
85            for (int j = 0; j < 8; j++) {
86                spi.write_word((i << 8) + (1 << j));
87                Thread.sleep(1000);
88            }
89            spi.write_word(i << 8);
90        }
91        //! [Interesting]
92    };
93}
94