Robert Cook / Mbed 2 deprecated Videodisplay

Dependencies:   EthernetNetIf mbed HTTPClient_ToBeRemoved

main.cpp@0:5461db8e4caa, 2012-06-13 (annotated)

Committer:
robertcook
Date:
Wed Jun 13 18:28:03 2012 +0000
Revision:
0:5461db8e4caa
Ethernet Video Display - LEDs

Who changed what in which revision?

UserRevisionLine numberNew contents of line
robertcook 0:5461db8e4caa 1 #include "mbed.h"
robertcook 0:5461db8e4caa 2 #include "EthernetNetIf.h"
robertcook 0:5461db8e4caa 3 #include "HTTPClient.h"
robertcook 0:5461db8e4caa 4
robertcook 0:5461db8e4caa 5 #define ScreenWidth 32
robertcook 0:5461db8e4caa 6 #define ScreenHeight 15
robertcook 0:5461db8e4caa 7
robertcook 0:5461db8e4caa 8 #define HTTPChunkSize 1024
robertcook 0:5461db8e4caa 9
robertcook 0:5461db8e4caa 10 #define ScreenBufferSize ScreenWidth*ScreenHeight*3
robertcook 0:5461db8e4caa 11
robertcook 0:5461db8e4caa 12 typedef struct {
robertcook 0:5461db8e4caa 13 byte blue;
robertcook 0:5461db8e4caa 14 byte green;
robertcook 0:5461db8e4caa 15 byte red;
robertcook 0:5461db8e4caa 16 } color;
robertcook 0:5461db8e4caa 17
robertcook 0:5461db8e4caa 18 unsigned int fileFrameCount;
robertcook 0:5461db8e4caa 19
robertcook 0:5461db8e4caa 20 color disp[ScreenWidth][ScreenHeight];
robertcook 0:5461db8e4caa 21 byte screenBuf[ScreenBufferSize];
robertcook 0:5461db8e4caa 22 byte readBuf[HTTPChunkSize];
robertcook 0:5461db8e4caa 23
robertcook 0:5461db8e4caa 24 Serial pc(USBTX, USBRX);
robertcook 0:5461db8e4caa 25
robertcook 0:5461db8e4caa 26 SPI spi(p5, NC, p7); // mosi, miso, sclk
robertcook 0:5461db8e4caa 27
robertcook 0:5461db8e4caa 28 #define LEDCount 110
robertcook 0:5461db8e4caa 29 #define channels LEDCount*3
robertcook 0:5461db8e4caa 30
robertcook 0:5461db8e4caa 31 EthernetNetIf eth;
robertcook 0:5461db8e4caa 32 HTTPClient http;
robertcook 0:5461db8e4caa 33
robertcook 0:5461db8e4caa 34 HTTPResult result;
robertcook 0:5461db8e4caa 35 bool completed = false;
robertcook 0:5461db8e4caa 36
robertcook 0:5461db8e4caa 37 void request_callback(HTTPResult r)
robertcook 0:5461db8e4caa 38 {
robertcook 0:5461db8e4caa 39 result = r;
robertcook 0:5461db8e4caa 40 completed = true;
robertcook 0:5461db8e4caa 41 }
robertcook 0:5461db8e4caa 42
robertcook 0:5461db8e4caa 43
robertcook 0:5461db8e4caa 44 void writePixel(int x, int y) {
robertcook 0:5461db8e4caa 45
robertcook 0:5461db8e4caa 46 spi.write(screenBuf[(x*ScreenHeight+y)*3]);
robertcook 0:5461db8e4caa 47 spi.write(screenBuf[(x*ScreenHeight+y)*3+1]);
robertcook 0:5461db8e4caa 48 spi.write(screenBuf[(x*ScreenHeight+y)*3+2]);
robertcook 0:5461db8e4caa 49
robertcook 0:5461db8e4caa 50 }
robertcook 0:5461db8e4caa 51
robertcook 0:5461db8e4caa 52
robertcook 0:5461db8e4caa 53 void updateDisplay() {
robertcook 0:5461db8e4caa 54 for (int y = ScreenHeight-1; y >= 0; y--) {
robertcook 0:5461db8e4caa 55 if (y % 2 == 0) {
robertcook 0:5461db8e4caa 56 for (int x = 0; x < ScreenWidth; x++)
robertcook 0:5461db8e4caa 57 writePixel(x,y);
robertcook 0:5461db8e4caa 58 }
robertcook 0:5461db8e4caa 59 else {
robertcook 0:5461db8e4caa 60 for (int x = ScreenWidth-1; x >= 0; x--)
robertcook 0:5461db8e4caa 61 writePixel(x,y);
robertcook 0:5461db8e4caa 62 }
robertcook 0:5461db8e4caa 63 }
robertcook 0:5461db8e4caa 64 wait_us(800);
robertcook 0:5461db8e4caa 65 }
robertcook 0:5461db8e4caa 66
robertcook 0:5461db8e4caa 67
robertcook 0:5461db8e4caa 68
robertcook 0:5461db8e4caa 69 void hexDump(byte *buf, unsigned long len, int wid) {
robertcook 0:5461db8e4caa 70
robertcook 0:5461db8e4caa 71 for (unsigned long i = 0; i < len; i++) {
robertcook 0:5461db8e4caa 72 if (!(i % wid)) pc.printf("\n");
robertcook 0:5461db8e4caa 73 else if (!(i % 4)) pc.printf(" ");
robertcook 0:5461db8e4caa 74
robertcook 0:5461db8e4caa 75 pc.printf("%02x", buf[i]);
robertcook 0:5461db8e4caa 76 }
robertcook 0:5461db8e4caa 77 pc.printf("\n");
robertcook 0:5461db8e4caa 78 }
robertcook 0:5461db8e4caa 79
robertcook 0:5461db8e4caa 80
robertcook 0:5461db8e4caa 81 int setupEthernet() {
robertcook 0:5461db8e4caa 82
robertcook 0:5461db8e4caa 83 pc.printf("Start\n");
robertcook 0:5461db8e4caa 84
robertcook 0:5461db8e4caa 85 pc.printf("Setting up...\n");
robertcook 0:5461db8e4caa 86 EthernetErr ethErr = eth.setup();
robertcook 0:5461db8e4caa 87
robertcook 0:5461db8e4caa 88 if(ethErr) {
robertcook 0:5461db8e4caa 89 pc.printf("Error %d in setup.\n", ethErr);
robertcook 0:5461db8e4caa 90 return -1;
robertcook 0:5461db8e4caa 91 }
robertcook 0:5461db8e4caa 92 pc.printf("Setup OK\n");
robertcook 0:5461db8e4caa 93 return (0);
robertcook 0:5461db8e4caa 94 }
robertcook 0:5461db8e4caa 95
robertcook 0:5461db8e4caa 96
robertcook 0:5461db8e4caa 97 int main() {
robertcook 0:5461db8e4caa 98
robertcook 0:5461db8e4caa 99 // Setup the spi for 8 bit data, high steady state clock,
robertcook 0:5461db8e4caa 100 // second edge capture, with a 1MHz clock rate
robertcook 0:5461db8e4caa 101 spi.format(8,1);
robertcook 0:5461db8e4caa 102 spi.frequency(1000000);
robertcook 0:5461db8e4caa 103
robertcook 0:5461db8e4caa 104 pc.baud(115200);
robertcook 0:5461db8e4caa 105
robertcook 0:5461db8e4caa 106 setupEthernet();
robertcook 0:5461db8e4caa 107 HTTPStream stream;
robertcook 0:5461db8e4caa 108 unsigned long dataReadRemaining = 6;
robertcook 0:5461db8e4caa 109 bool headerLoaded = false;
robertcook 0:5461db8e4caa 110 unsigned int screenBufInd = 0;
robertcook 0:5461db8e4caa 111
robertcook 0:5461db8e4caa 112 stream.readNext((byte *)readBuf, 6);
robertcook 0:5461db8e4caa 113
robertcook 0:5461db8e4caa 114 HTTPResult r = http.get("http://192.168.1.129/traffic.vid", &stream, request_callback);
robertcook 0:5461db8e4caa 115
robertcook 0:5461db8e4caa 116 while(!completed) {
robertcook 0:5461db8e4caa 117 Net::poll(); //Polls the Networking stack
robertcook 0:5461db8e4caa 118
robertcook 0:5461db8e4caa 119 if (stream.readable()) {
robertcook 0:5461db8e4caa 120 unsigned int readLength = stream.readLen();
robertcook 0:5461db8e4caa 121
robertcook 0:5461db8e4caa 122 // Load and process six byte header
robertcook 0:5461db8e4caa 123 // Three integers -- frame count, height, width
robertcook 0:5461db8e4caa 124 if (headerLoaded == false) {
robertcook 0:5461db8e4caa 125 headerLoaded = true;
robertcook 0:5461db8e4caa 126 fileFrameCount = readBuf[0]+readBuf[1]*256;
robertcook 0:5461db8e4caa 127 pc.printf("# of frames: %i\n", fileFrameCount);
robertcook 0:5461db8e4caa 128 pc.printf("height x width: %i x %i\n", readBuf[2]+readBuf[3]*256, readBuf[4]+readBuf[5]*256);
robertcook 0:5461db8e4caa 129
robertcook 0:5461db8e4caa 130 dataReadRemaining = ScreenBufferSize;
robertcook 0:5461db8e4caa 131 stream.readNext(readBuf, HTTPChunkSize);
robertcook 0:5461db8e4caa 132 }
robertcook 0:5461db8e4caa 133 // else load image
robertcook 0:5461db8e4caa 134 else {
robertcook 0:5461db8e4caa 135 dataReadRemaining -= readLength;
robertcook 0:5461db8e4caa 136 //pc.printf("%i", (unsigned int)dataReadRemaining);
robertcook 0:5461db8e4caa 137
robertcook 0:5461db8e4caa 138 memcpy(screenBuf + screenBufInd, readBuf, readLength);
robertcook 0:5461db8e4caa 139
robertcook 0:5461db8e4caa 140 // if any remaining data
robertcook 0:5461db8e4caa 141 if (dataReadRemaining) {
robertcook 0:5461db8e4caa 142 //pc.printf(".\n");
robertcook 0:5461db8e4caa 143 screenBufInd += readLength;
robertcook 0:5461db8e4caa 144 stream.readNext((byte*)readBuf, (dataReadRemaining > HTTPChunkSize ? HTTPChunkSize : dataReadRemaining));
robertcook 0:5461db8e4caa 145 }
robertcook 0:5461db8e4caa 146 else {
robertcook 0:5461db8e4caa 147 //pc.printf("!\n");
robertcook 0:5461db8e4caa 148
robertcook 0:5461db8e4caa 149 // hexDump(screenBuf,1440,32);
robertcook 0:5461db8e4caa 150 updateDisplay();
robertcook 0:5461db8e4caa 151 //while(1);
robertcook 0:5461db8e4caa 152
robertcook 0:5461db8e4caa 153 dataReadRemaining = ScreenBufferSize;
robertcook 0:5461db8e4caa 154 screenBufInd = 0;
robertcook 0:5461db8e4caa 155 stream.readNext((byte*)readBuf, HTTPChunkSize);
robertcook 0:5461db8e4caa 156 }
robertcook 0:5461db8e4caa 157 }
robertcook 0:5461db8e4caa 158 }
robertcook 0:5461db8e4caa 159
robertcook 0:5461db8e4caa 160 }
robertcook 0:5461db8e4caa 161 pc.printf("\n--------------\n");
robertcook 0:5461db8e4caa 162 if (result == HTTP_OK) pc.printf("Read completely\n");
robertcook 0:5461db8e4caa 163 else pc.printf("Error %d\n", result);
robertcook 0:5461db8e4caa 164
robertcook 0:5461db8e4caa 165
robertcook 0:5461db8e4caa 166 while(1){}
robertcook 0:5461db8e4caa 167 }