How to set received time of A/D (AT-MIO-16E-1) that synchronize with interrupt time(0.5 msec)

[0]

I want to use A/D to received one data every 0.5 msec (interrupt time set by timer/counter). My program can received it but look like it doesn't correct. So if you don't mind ,can you please give me an advice (or if possible, please send me this A/D setting program in C lang.)

Thank you for your advice

[Michael_S.]

Hello,

From what I understand you are trying to setup an analog input acquisition using an external scan clock. Then use a counter to produce the external scan clock.

Here are two examples written in C. One sets up an E-series DAQ board to recieve an external scan clock on PFI7 and the other sets up Counter 0 to output a pulse train.
You would just need to mesh these two examples together and wire the OUT pin of counter 0 to PFI7 (SCAN_START pin).


If you are using Counter 0 you could also change the Select Signal call in the AI external scan clock example to ---Select_Signal(iDevice, ND_IN_SCAN_START, ND_GPCTR0_OUTPUT, ND_LOW_TO_HIGH);---, which would elminate the need for external wiring and would wire the OUT of counter 0 to the scan clock.

The
following examples ship with NI-DAQ and can be found by installing support for Visual C or LabWindows/CVI.

[jejun]

How would I do it if I were to use digital input as the source for my input instead of analog input? The SCAN_XXX functions only seem to support analog inputs. How do I get around this?

Thanks.