Posted on September 08, 2008 at 10:13Hello everybody,
I have a problem concerning the Loopback function of the UART1 of the Str71. If I enable this function I cannot receive data (from an external device) anymore.
If I disable it the reception of data works properly.
Please have a look at the sample code below.
Thank you
Jojo
uart1.disableLoopBack( false);// if this is set to ''true'' I get a timeout in the receiveData function (see below)
uart1.enableSmartCardInterface();
uart1.clearRxBuffer();
uart1.clearTxBuffer();
uart1.enableReceiver( true );
uart1.enableFifos( true );
uart1.setGuardTime( 2 );
uart1.setBaudRate( 9600 );
uart1.setEvenParity();
uart1.setStopBits( STOP_BITS_1_5 );
uart1.setDataMode( MODE_8BIT_DATA_PARITY );
uart1.enableUart();
uart1.clearRxBuffer();
reset();//triggers the data sending to the microcontroller
uart1.clearRxBuffer();
lengthATRTable=ATRLENGTH;
if(!receiveData(atrTable, &lengthATRTable, TIMEOUT))
[...]
bool receiveData(unsigned char *recBuffer, unsigned long *lengthRecBuffer, const unsigned long timeout)
{
unsigned long timeoutCounter=0;
unsigned long recCounter=0;
uart1.enableReceiver(true);
while((!(uart1.isRxBufferNotEmpty()))&&(timeoutCounter
{
timeoutCounter++;
}
if(timeoutCounter
{
for(long i=0;i
if(uart1.receiveByte(&recChar, 0xff))
{
recBuffer[recCounter]=(unsigned char) recChar;
recCounter++;
}
}
(*lengthRecBuffer)=recCounter;
return true;
}
[....]
}
