Sorry, I meant to give you some idea about the code:
In summary I have an analog Task of 8 chs, and 2 counter tasks, one counter for very tooth of a revolution, and the other counter task for Once per Revolution.
class CCommunication
{
.......
int variable(s); //I have many variables declared here - like 50 of them
int *m_Buffer; // I need this buffer to carry the data after I read NI data and process it, I wanna stuff it in this buffer to use it for the rest of the project
int GetNIDAQData(int *Buffer); //This function is where I read the NI data
......
DAQmxReadBinary16( ...)
DAQmxReadCounterU32(...)..
.....
};
// implementation in .CPP
.......
while(1)
{
.....
int ReturnStringSize = GetNIDAQData(m_Buffer); //function call to come back with Buffer and string size from underneath
.......
//After I filled the m_Buffer from reading NI from the function below, I will pass it on to the rest of the project
......more processing
.......Garph data...
.......etc.....
}
int CCommunication::GetNIDAQData(int *Buffer)
{
if(Buffer is Ready to be Read)
{
DAQmxReadBinary(... 8 chs...)
DAQmxReadCounterU32( .....)
DAQmxReadCounterU32( .....)
........
Process data ....
...........
Buffer[0] = Time;
Buffer[1] = RPM;
Buffer[2] = Max Time;
Buffer[3] = Degrees.
Buffer[4 = AnalogCh1Value;
Buffer[5] = AnalogCh2Value;
....etc .......
}
else
return 0;
}
Q1) In the RegisterEverySamplesEvent function, Do I specify (#of SamplesPerChannel) or Total# of Samples....I currently do SampsPerChannel.
Q2) I am specifying SetInputBufferSize() even though its continuous acquisition, because it fails when the #of samples sepecified to issue the trigger varies and becomes a non-multiple of the buffer size or vice versa (-20777)...Does this make sense?
like I said, I will give your thought #1 a go as well.
