main.cpp

00001 /*
00002  * Echo server
00003  * Listens on TCP and UDP ports 7 for any incoming connections
00004  * Re-transmits any incoming bytes
00005  */
00006 
00007 #include "mbed.h"
00008 #include "EthernetNetIf.h"
00009 
00010 #include "EchoServer.h"
00011 
00012 #define byte char
00013 
00014 #define ScreenWidth 32
00015 #define ScreenHeight 15
00016 
00017 #define HTTPChunkSize 1024
00018 
00019 #define ScreenBufferSize ScreenWidth*ScreenHeight*3
00020 
00021 bool drawReadyFlag = false;
00022 
00023 int bytes_received = 0;
00024 
00025 
00026 
00027 
00028 
00029 typedef struct {
00030   byte blue;
00031   byte green;
00032   byte red;
00033 } color;
00034 
00035 unsigned int fileFrameCount;
00036 
00037 byte screenBuf[ScreenBufferSize];
00038 
00039 // Our Ethernet interface
00040 EthernetNetIf eth;
00041 // Our Echo server
00042 EchoServer* server = new EchoServer(screenBuf);
00043 
00044 Serial pc(USBTX, USBRX);
00045 
00046 SPI spi(p5, NC, p7); // mosi, miso, sclk
00047 
00048 void writePixel(int x, int y) {
00049     spi.write(screenBuf[(y*ScreenWidth+x)*3]);
00050     spi.write(screenBuf[(y*ScreenWidth+x)*3+1]);
00051     spi.write(screenBuf[(y*ScreenWidth+x)*3+2]);
00052 }
00053 
00054 
00055 void updateDisplay() {
00056     for (int y = ScreenHeight-1; y >= 0; y--) {
00057     
00058         /**
00059         for (int x = 0; x < ScreenWidth; x++) {
00060             writePixel(x,y);
00061         }
00062         **/
00063     
00064         
00065         if (y % 2) {
00066             for (int x = 0; x < ScreenWidth; x++) 
00067                 writePixel(x,y);
00068         } 
00069         else {
00070             for (int x = ScreenWidth-1; x >= 0; x--)
00071                 writePixel(x,y);
00072         }
00073         
00074     }
00075     wait_us(800);
00076 }
00077 
00078  
00079 
00080 void hexDump(byte *buf, unsigned long len, int wid) {
00081 
00082     for (unsigned long i = 0; i < len; i++) {
00083         if (!(i % wid)) pc.printf("\r\n");
00084         else if (!(i % 4)) pc.printf(" ");
00085 
00086         pc.printf("%02x", buf[i]);
00087     }
00088     pc.printf("\r\n");
00089 }
00090 
00091 
00092 /*
00093     Function: main
00094     
00095     Sets up the Ethernet interface using DHCP, reports the assigned
00096     IP address via serial, binds the Echo server to port 7 on
00097     TCP and UDP and then sits in a loop calling Net::poll() to
00098     keep the network stack doing its thing
00099 */
00100 int main() {
00101     spi.format(8,1);
00102     spi.frequency(1000000);
00103     printf("\r\nSetting up...\r\n");
00104     //spi.frequency(100000);
00105     EthernetErr ethErr = eth.setup();
00106     if (ethErr) {
00107         printf("Error %d in setup.\r\n", ethErr);
00108         return -1;
00109     }
00110     IpAddr ip = eth.getIp();
00111     printf("mbed IP Address is %d.%d.%d.%d\r\n", ip[0], ip[1], ip[2], ip[3]);
00112     server->bind();
00113 
00114     printf("Entering while loop Net::poll()ing\r\n");
00115     while (1) {
00116         Net::poll();
00117         if (drawReadyFlag) {
00118             //printf("updating display\r\n");
00119             updateDisplay();
00120             drawReadyFlag = false;
00121         }
00122     }
00123 }