Ah -- thank you for the clarification. On Monday, December 1, 2014 6:35:15 PM UTC-6, Charles Steinkuehler wrote: > > Not exactly, but that's what you'd get if you just did a read of the > GPIO input register from the PRU. If you want to go faster, you have a > few options: > > * Use the direct PRU inputs (reads complete in 5 nS with no wait states) > > * DMA data from the GPIO input register to the PRU. I haven't tested > GPIO read latency when using DMA, it might be faster than doing reads > with the PRU, and at the very least you wouldn't be stalling the PRU > while the read is "in flight". > > * You might be able to read with both PRUs in lock-step but opposite > phase, so you could get apx. 12 MHz updates (untested). > > ...but really, if you want speed, use the direct PRU I/O pins, that's > what they're for. > > >
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