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timestamp pulses on multiple digital lines from one counter

Hi guys,

 

I'm trying to get accurate timing of digital inputs using my M-series PCIe-6363 National Instruments card and LabView. What I've done so far is generate a counter on the 100kHz internal clock that is sampled by a digital line that I want to monitor events on. I do this by inputting an edge counter task to a sample clock for my digital channel, which allows me to acquire the current clock count when a rising edge is detected on that input channel. This works fine with one channel (see *_1ch_CFA.vi).

 

However, I need to timestamp multiple channels from the same counter, and my own implementation of this will not work (it won't even start). See *_2ch_CFA.vi.

 

Any help would be greatly appreciated!

- Chris

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