1 /* 2 * Author: Michael Ring <mail (at) michael-ring.org> 3 * Author: Thomas Ingleby <thomas.c.ingleby (at) intel.com> 4 * Copyright (c) 2014 Intel Corporation. 5 * Author: Petre Eftime <petre.p.eftime (at) 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 28 import java.nio.ByteBuffer; 29 import mraa.Result; 30 import mraa.Spi; 31 32 public 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
