PIT interrupt handler not triggered on KL26Z

mihaineken — Sun, 02 Apr 2023 14:37:11 GMT

I have a FRDM-KL26Z board I am trying to use PIT to get an interrupt, but it fails.

Things that I am doing:

- declare the PIT handler that should print a line of text

void PIT_IRQHandler(void) { PRINTF("PIT_IRQHandler \r\n"); }

- set-up PIT

unsigned int *sim_scgc6 = (unsigned int *) 0x4004803C; *sim_scgc6 |= 1U << 23; // enable clock gate PIT unsigned int *pit_mcr = (unsigned int *) 0x40037000; *pit_mcr &= ~(1U << 1); // enable PIT *pit_mcr &= ~(1U << 0); // timer continues in debug mode unsigned int *pit_ldval0 = (unsigned int *) 0x40037100; // *pit_ldval0 = 0x0003E7FF; // setup timer 1 for 256000 cycles *pit_ldval0 = 0xF; unsigned int *pit_tctrl0 = (unsigned int *) 0x40037108; *pit_tctrl0 |= 1U << 1; // enable interrupt *pit_tctrl0 |= 1U; // start timer

- then enter an infinite loop

I am not getting the line from the PIT handler.

I have attached the full code. Is it something that I am missing? In debug mode I see the timer changing and the TIF flag is set, but the handler is not executed.

Re: PIT interrupt handler not triggered on KL26Z

CarlosGarabito — Tue, 04 Apr 2023 01:28:34 GMT

You can find some examples of PIT that can guide you on your design on SDK (https://mcuxpresso.nxp.com/en/welcome)

Kinetis MicrocontrollersのトピックPIT interrupt handler not triggered on KL26Z

PIT interrupt handler not triggered on KL26Z

Re: PIT interrupt handler not triggered on KL26Z