John, Just a random thought here . . . perhaps adding a NOP or two would be better than using a delay function. A Single NOP would / should be exactly 5ns . . .
On Tue, Feb 16, 2016 at 2:42 PM, William Hermans <yyrk...@gmail.com> wrote: > *When I seperate each command by a delay, the rising edge of the clock >> takes ~90ns to go from 0V to 3.3V. I was under the impression that this >> operation would be performed at around ~5ns. I have attached the reading >> from my oscilloscope. My question is, is what I am seeing normal or am I >> doing something wrong?* >> > > What kind of a delay are you using ? But if this delay has to interact > with an on chip timer of the L3 interconnect . . . it's going to take a lot > longer than ~5NS. Which is what I would think you're finding out now, but > I'm no expert . . . > > On Tue, Feb 16, 2016 at 2:08 PM, John M <john.mar...@gmail.com> wrote: > >> Hello All, >> >> I'm trying to create a clock using the PRU, and I have it working to an >> extent, but I am noticing a discrepancy between what I read in the TRM and >> what I'm seeing. When I use a series of SET CLR SET CLR commands on a pin, >> they do not resolve completely before the next command. When I seperate >> each command by a delay, the rising edge of the clock takes ~90ns to go >> from 0V to 3.3V. I was under the impression that this operation would be >> performed at around ~5ns. I have attached the reading from my oscilloscope. >> My question is, is what I am seeing normal or am I doing something wrong? >> >> Thank you. >> >> >> <https://lh3.googleusercontent.com/-HgSaQGizihc/VsOPr4eIEPI/AAAAAAAACwA/fJOdPU4KSlo/s1600/LeCroy.png> >> >> >> -- >> 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 beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
