EXTI latency is not the issue. It could sit there for a month... no issues. You want it to be short for performance but You read the mouse and joystick once every 1/50th of a second and you read the RTC once at boot time. So speed isnt critical.arkadiusz.makarenko wrote: Mon Oct 12, 2020 11:13 pm That is what I did try, already.
I need to measure exti latency....
I even can't read meaningful data from the bus.
Time for a break and regroup I think.... it was worth a try. (Need to get a little bit better with verilog)
The issue is that when you ACK the ARM is still putting data on the bus. So the next instruction fetch crashes.
I suspect the bus isnt getting tristated again.
You could try put data on the bus... when you ack latch it into the cpld... then read it from the cpld on some other random address.
