SV_STATUS doSVDeferredProcessing( void )
{
if( DeferredProcessingRequired )
{
lnMsg msg ;
SV_Addr_t unData ;
msg.sv.command = (byte) OPC_PEER_XFER ;
msg.sv.mesg_size = (byte) 0x10 ;
msg.sv.src = DeferredSrcAddr ;
msg.sv.sv_cmd = SV_DISCOVER | (byte) 0x40 ;
msg.sv.sv_type = (byte) 0x02 ;
msg.sv.svx1 = (byte) 0x10 ;
msg.sv.svx2 = (byte) 0x10 ;
unData.stDecoded.unDestinationId.w = readSVDestinationId();
unData.stDecoded.unVendorIdOrSvAddress.w = SV_VENDOR_ID;
unData.stDecoded.unDeviceId.w = SV_DEVICE_ID;
unData.stDecoded.unSerialNumber.b.lo = readSVStorage(SV_ADDR_SERIAL_NUMBER_L);
unData.stDecoded.unSerialNumber.b.hi = readSVStorage(SV_ADDR_SERIAL_NUMBER_H);
encodePeerData( &msg.px, unData.abPlain );
if( sendLocoNetPacketTry( &msg, LN_BACKOFF_INITIAL + ( unData.stDecoded.unSerialNumber.b.lo % (byte) 10 ) ) != LN_DONE )
return SV_DEFERRED_PROCESSING_NEEDED ;
DeferredProcessingRequired = 0 ;
}
return SV_OK ;
}
LN_STATUS LocoNetClass::send(lnMsg *pPacket)
{
unsigned char ucTry;
unsigned char ucPrioDelay = LN_BACKOFF_INITIAL;
LN_STATUS enReturn;
unsigned char ucWaitForEnterBackoff;
for (ucTry = 0; ucTry < LN_TX_RETRIES_MAX; ucTry++)
{
// wait previous traffic and than prio delay and than try tx
ucWaitForEnterBackoff = 1; // don't want to abort do/while loop before
do // we did not see the backoff state once
{
enReturn = sendLocoNetPacketTry(pPacket, ucPrioDelay);
if (enReturn == LN_DONE) // success?
return LN_DONE;
if (enReturn == LN_PRIO_BACKOFF)
ucWaitForEnterBackoff = 0; // now entered backoff -> next state != LN_BACKOFF is worth incrementing the try counter
}
while ((enReturn == LN_CD_BACKOFF) || // waiting CD backoff
(enReturn == LN_PRIO_BACKOFF) || // waiting master+prio backoff
((enReturn == LN_NETWORK_BUSY) && ucWaitForEnterBackoff)); // or within any traffic unfinished
// failed -> next try going to higher prio = smaller prio delay
if (ucPrioDelay > LN_BACKOFF_MIN)
ucPrioDelay--;
}
LnBuffer.Stats.TxErrors++ ;
return LN_RETRY_ERROR;
}
LN_STATUS LocoNetClass::send( uint8_t OpCode, uint8_t Data1, uint8_t Data2, uint8_t PrioDelay )
{
lnMsg SendPacket ;
SendPacket.data[ 0 ] = OpCode ;
SendPacket.data[ 1 ] = Data1 ;
SendPacket.data[ 2 ] = Data2 ;
return sendLocoNetPacketTry( &SendPacket, PrioDelay ) ;
}
LN_STATUS LocoNetClass::send(lnMsg *pPacket, uint8_t ucPrioDelay)
{
return sendLocoNetPacketTry(pPacket, ucPrioDelay);
}
