And thinking some more it may be that most of the time in your interrupts is register dumping and restoring - can you make the ISR just write the value to the buffer and do nothing else, without...
Type: Posts; User: MarkT
And thinking some more it may be that most of the time in your interrupts is register dumping and restoring - can you make the ISR just write the value to the buffer and do nothing else, without...
One way to debug interrupts is use a digital pin (with fast writes or low-level register manipulation) so you can monitor the entry/exit using a 'scope.