A performance counter is an on-chip counter on RX63x dedicated to performance measurements. The resolution is ICLK, means 10.87ns at 82MHz. There are several possible problems with your measurement. 1. The time stamp value in e2 studio is only 20 bit. So the maximum time is 10.87ms. 2. In a time of 100ms, the number of trace entries will exceed the size of RX63x internal trace buffer. 3. Does your software hit a breakpoint between first and second call? On-chip timers will continue to run while the software is stopped in a break. Interrupts are being saved while the software is stopped. If the software continues execution afterwards it will immediately go to the interrupt routine.
↧
