Near Simultaneous Output and Reading

Post general discussions on using our drivers to write your own software here
Post Reply
liemph
User
User
Posts: 4
Joined: Fri Mar 14, 2003 10:37 am
Location: JAPAN

Near Simultaneous Output and Reading

Post by liemph »

I use VB for collecting and displaying the measurement results from my DrDaq. The following may be a stupid question. Using the provided pico DLL, could I send a 1 ms pulse to the digital output while making a fast mode measurement (i.e. simultaneous output and reading) to see the response of a circuit to the pulse ? :?:

User avatar
matthew
Advanced User
Advanced User
Posts: 109
Joined: Wed Sep 25, 2002 9:35 am
Location: Cambridgeshire, UK

Post by matthew »

Hi,

The digital out is a direct connection from a parallel port pin, therefore its response depends on your PC and windows.

I wouldn't recommend using it for timing critical applications. Also ... because single processor PCs are ultimately single threaded in terms of execution order, you would stop fast-sampling whilst the digital out was changing state. This could affect your results by leaving gaps in your data.

Best Regards,
Matt Everett

Pico Software Engineer

Post Reply