main.cpp

00001 #include "mbed.h"
00002 #define BUF_SIZE 1024
00003  
00004 // attributes - peripherals
00005 Serial pc(SERIAL_TX, SERIAL_RX);
00006 DigitalOut myled(LED1);
00007 Timer timeout;
00008 Ticker blinker;
00009  
00010 // attributes - program variables
00011 char fileOverSerialBuffer[BUF_SIZE];   // buffer to store received string over pc
00012 
00013 // local methods
00014 void ledBlink ( void ) {
00015     myled != myled;
00016 }
00017 
00018 // main
00019 int main() {
00020 
00021     int i;
00022     int bytesReceived = 0;
00023 
00024     pc.baud ( 600 ); // slow communication!
00025     //pc.attach(&serialDataCallback);  // attach pc ISR
00026 
00027     while ( true ) {
00028 
00029         // ready for a new file to be received
00030         bytesReceived = 0; 
00031         timeout.stop();
00032         timeout.reset();
00033         blinker.attach( &ledBlink, 1.0 );
00034         
00035         // wait for input
00036         while ( pc.readable() && timeout.read() < 1 ) {
00037                 if ( bytesReceived == 0 ) {
00038                     timeout.start(); // watchdog 
00039                     timeout.reset();
00040                 }
00041                 if ( bytesReceived < BUF_SIZE-1 ) { // avoid buffer overflow
00042                     fileOverSerialBuffer[bytesReceived++] = pc.getc();
00043                     myled = fileOverSerialBuffer[bytesReceived] & 0x01; // show activity
00044                     timeout.reset(); // got byte: reset watchdog
00045                 } else
00046                     break; // buffer full - stop receiving
00047         }
00048 
00049         // file completed - process
00050         fileOverSerialBuffer[bytesReceived+1] = '\x00'; // terminate a string
00051         blinker.detach(); // stop flashing
00052         myled = 1; // processing
00053         pc.printf("Got %d bytes\n\r", bytesReceived);
00054         for ( i=0; i < bytesReceived; i++) {
00055             pc.printf("%.2x ", fileOverSerialBuffer[i]);
00056             if ( !(i%16) && i!=0 ) pc.printf("\n\r");
00057         }
00058         pc.printf("\n\r");
00059         myled = 0; // done
00060         
00061 
00062     }
00063 }