I have code developed using the for the K02FN64VFM10 in which I am using the SysTick to generate an ISR. On a FRDM-K22F board the code executes and I can see that ISR gets services. However, when I down load it onto the K02 target the code executes but the SysTick ISR is not serviced. I'm not sure why this is happening.
Hello Darwin Smith:
I guess you are using a custom board for the K02. If that is the case please revise that the NMI pin (PTA4) is not in low state by an external signal during Power-ON / Reset. If possible place a pull up resistor.
Then also related to the NMI pin there could be an issue in debug mode, see this document by colleague Alistair:
Interrupts appear to be disabled when debugging.pdf
Let us know if the issue persists.
Regards!
Jorge Gonzalez