I needed to detect writes to a bus that could happen at 1MHz, which involved reading the state of the bus multiple times per microsecond (based on the timing of the various signals). The jitter in the worst case was multiple microseconds (causing missed accesses), no matter what I tried.
I wasn’t able to use DMA on the ESP32 to help— perhaps it could have if I had tried to massage the problem a little bit more though.
I needed to detect writes to a bus that could happen at 1MHz, which involved reading the state of the bus multiple times per microsecond (based on the timing of the various signals). The jitter in the worst case was multiple microseconds (causing missed accesses), no matter what I tried.
I wasn’t able to use DMA on the ESP32 to help— perhaps it could have if I had tried to massage the problem a little bit more though.