Re: Full-Speed USB May Not Be Possible
Posted: Sun Sep 04, 2016 7:23 am
Hi Charles, I'm Nicolas and new here. Exploring your different projects in the last months eventually convinced me to dig into ESP and electronics, so thanks for that
Even if that didn't solve your problem, could you elaborate about this particular aspect ? Does it mean that an interrupt routine can start to execute the cycle immediately following a pin change (or at least after the same fixed number of cycles) ?
I'd like to be able to measure/count the exact number of cycles betwen two pulses (a few microseconds distant, applied on same or different input pin) as precisely as possible. Is there any special interrupts setup to properly achieve this ? (If you, or someone else here, could provide a simple example..)
cnlohr wrote:... When the ESP receives a pin-change interrupt, it is cycle-precise all the way down to 160MHz!...
Even if that didn't solve your problem, could you elaborate about this particular aspect ? Does it mean that an interrupt routine can start to execute the cycle immediately following a pin change (or at least after the same fixed number of cycles) ?
I'd like to be able to measure/count the exact number of cycles betwen two pulses (a few microseconds distant, applied on same or different input pin) as precisely as possible. Is there any special interrupts setup to properly achieve this ? (If you, or someone else here, could provide a simple example..)