Hello,
I'm writing a program to simultaneously measure and output two voltages from a DAQ card. The program needs to use the current value of the output to compute information from the two inputs; however, the sampling rates of the inputs and outputs are different (MHz vs. KHz). Right now, I'm using three loops: one for reading, one for writing, and one for data analysis, with a queue to send data from the read loop and one to send data from the writing loop. This has been working, but recently the delay between the start and end of the sample buffer for the writing loop has become a problem, since the way the processing loop just takes the last value that will be written to the card rather than the value that's just been written, which may be quite different. I have foudn some documents related to synchronization but they seem to be related to synching external equipment to the card vs. the computation with the card.
Question: Is there some way to tell, inside of the "processing" loop, since it is running much faster than the output loop, what the current value of the outputs are? Or, alternatively, compare the waveform data being written to the current time to figure out what the output is supposed to be at a specific iteration of the processing loop?
Other information:
Using waveform data types, no regen on output task, continuous sampling.
Attached is a basic diagram of the current progam (clearly not the actual program, just the idea.)
