High speed data grabber?

Dave Matthews

I need an interface to existing legacy equipment, the requirement being capture and store a 5 bit word when a sixth bit 'strobe' occurs. The strobe bit high duration is about 0.5uS, and the interval between strobe pulses is a little less than 20uS. There are only about 50 or so words in a burst of this data, and many seconds elapse between bursts.

I have decided to try this most excellent Propeller Chip for this application, if it is able. I would appreciate any comments and tips!

Thanks,
Dave KI4PSR

Phil Pilgrim (PhiPi)

That should be pretty easy to do with the Prop in assembly. You can use WAITPEQ to wait for the strobe, then immediately read the input ports. There should be plenty of time left over to shift/pack the data if you have to and stash it somewhere before the next one comes in.

-Phil

Dave Matthews

Thanks for the reassurance Phil!

I will try what you suggest,

Dave KI4PSR