we are using mc9s12dg256 uC for our project. We have implement ISR for Port P Interrupt, CAN0, SPI1, SP2, Modulus Down Counter underflow, Port J, SCI1,SC2, TimerHandler, TC7_int, TC3_int, Real timer and XIRQ that work fine without nested interrupts.
What we need to do is to allow nested interrupts only at Modulus Down Counter. Thus, we added a CLI command to its ISR, but the device now is not responding. The stack seems to be empty.
Is it possible a nested interrupt function with this uC?
If yes, are any other settings that has to be made?
Does priority has to do anything with this?
Thanks in advance.