int SendDataPacket (SourceVChan_type* srcVChan, DataPacket_type** dataPacketPtr, BOOL srcVChanNeedsPacket, char** errorMsg)
{
INIT_ERR
size_t nSinks = ListNumItems(srcVChan->sinkVChans);
SinkVChan_type* sinkVChan = NULL;
size_t nPacketsSent = 0; // counts to how many Sink VChans the packet has been sent successfuly
size_t nPacketRecipients = 0; // counts the number of packet recipients
// set packet counter
// Note: Since the Source VChan is open, an active Sink VChan is also an open Sink VChan
if (srcVChanNeedsPacket) {
nPacketRecipients = GetNumOpenSinkVChans(srcVChan)+1;
nPacketsSent++;
} else
nPacketRecipients = GetNumOpenSinkVChans(srcVChan);
if (*dataPacketPtr)
SetDataPacketCounter(*dataPacketPtr, nPacketRecipients);
// if there are no recipients then dispose of the data packet
if (!nPacketRecipients) {
ReleaseDataPacket(dataPacketPtr);
return 0;
}
// send data packet
for (size_t i = 1; i <= nSinks; i++) {
sinkVChan = *(SinkVChan_type**)ListGetPtrToItem(srcVChan->sinkVChans,i);
if (!sinkVChan->baseClass.isOpen) continue; // forward packet only to open Sink VChans connected to this Source VChan
// put data packet into Sink VChan TSQ
CmtErrChk( CmtWriteTSQData(sinkVChan->tsqHndl, dataPacketPtr, 1, (int)sinkVChan->writeTimeout, NULL) );
nPacketsSent++;
}
*dataPacketPtr = NULL; // Data packet is considered to be consumed even if sending to some Sink VChans did not succeed
// Sink VChans that did receive the data packet, can further process it and release it.
return 0;
CmtError:
Cmt_ERR
Error:
// cleanup
for (size_t i = 0; i < nPacketRecipients - nPacketsSent; i++)
ReleaseDataPacket(dataPacketPtr);
RETURN_ERR
}
/* In another thread, receives data and writes them into TSQ */
int CVICALLBACK receiveDataWriteToTSQ(void *functionData){
int storeFileFlag = 0;
GetCtrlVal(panelHdl, MainPanel_StoreTheData_Switch, &storeFileFlag);
if(0 == dataSrc){ //read data from [device port]
if(OpenComConfig(comPort, "", baudRate, parity,
dataBits, stopBits, inQueueSize, outQueueSize) <0)
showError("Failed to open RS232 port!");
if(storeFileFlag > 0){
if( writeFPP >0){
writeFP = fopen(writeFilePath, "a");
if(writeFP == NULL)
showError("Open WriteFile Failed");
fseek(writeFP, writeFPP, SEEK_SET);
}else{
SYSTEMTIME localTime;
char dirName[MAX_PATHNAME_LEN];
char fileName[200];
GetProjectDir(dirName);
strcat(dirName, "\\DataStorage");
GetLocalTime(&localTime);
sprintf(fileName, "%04d-%d-%d,%d_%02d_%02d.dat",
localTime.wYear, localTime.wMonth, localTime.wDay,
localTime.wHour, localTime.wMinute, localTime.wSecond);
MakePathname(dirName, fileName, writeFilePath);
writeFP = fopen(writeFilePath, "a");
if(writeFP == NULL) showError("Open WriteFile Failed");
}
}//if(storeFileFlag)
}else if(1 == dataSrc){ //read data from [file]
loadFP = fopen(loadFilePath, "r");
if(loadFP == NULL){
showError("Load File Failed");
return -1;
}
fseek(loadFP, loadFPP, SEEK_SET);
}else{ //[simulating data]
}
GetCtrlVal(panelHdl, MainPanel_StoreTheData_Switch, &storeFileFlag);
while(receiveFlag){
writeTSQEndFlag = 1;
switch(dataSrc){
case 0:
bytesRead = ComRd(comPort, readData, READ_LENGTH);
if(storeFileFlag > 0)
fwrite(readData, sizeof(char), READ_LENGTH, writeFP);
break;
case 1:
Delay(fileLoadSpeed);
if(!feof(loadFP)){
bytesRead = fread(readData, sizeof(char), READ_LENGTH, loadFP);
}else{
receiveFlag = 0;
MessagePopup("Reach The End", "All data in this file has been read !");
}
break;
case 2:
for(int i=0; i<READ_LENGTH; i++)
readData[i] = 0x80;
Delay(0.1);
break;
}//switch()
CmtWriteTSQData(tsqHdl, &readData, READ_LENGTH, TSQ_INFINITE_TIMEOUT, NULL);
writeTSQEndFlag = 0;
}//while()
switch(dataSrc){
case 0:
//CloseCom(comPort);
if(storeFileFlag >0){
if(!feof(writeFP))
writeFPP = ftell(writeFP);
fclose(writeFP);
writeFP = NULL;
}
break;
case 1:
if(!feof(loadFP))
loadFPP = ftell(loadFP);
fclose(loadFP);
loadFP = NULL;
break;
}//switch()
addLog("End-Acq", 0, panelHdl);
return 0;
}
