Paralel Port Random Behaviour

Submitted by ravime
on July 15, 2008 - 8:02am

Hi everbody,

I am using PC parallel port to send and Rx the message to ARM processor.

This Arm processors is exclusively for rx and Tx the message to parallelport.

Whenever I start the communication I could able to send and Rx the messgage withinn 200usec.

But after 1 or 2 minuites Tx and Rx message will take 5000 usec and 200 usec respectively.

But after sometime(random time) Tx and Rx message takes random amount of time i.e 30/40/10/100/0.2/5/200msec.

Could anybody give me an hint. What may be root cause for this type of response time.

Thanks and Regards
ravime