On Thursday, May 25, 2017 at 10:01:40 AM UTC-5, M Pitman wrote: > > > If anyone can shed any light on what I'm seeing with the __delay_cycles > command I would be interested in hearing about it. Thanks. >
Program the PRUs in assembly, especially if you want single cycle accuracy. ...or at least provide us the assembly listing for the C code, as well as the entire C program. There are lots of things that can be happening behind the scenes since you're using C. On the MPS-430, for example, the __delay_cycles() routine actually turns off most of the processor (to save power) and wakes it back up after the delay expires, which could obviously cause unexpected behavior if you didn't realize that's what it was doing. I don't use C compiler so I'm not sure how this routine is implemented for the PRU, but it probably isn't a simple noop loop like you might expect. -- Charles [email protected] -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/afd7ba5d-929b-446e-92f8-4860ab0dbca0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
