MPC5xxxのトピックRe: MPC5748G PIT interrupt problem

MPC5748G PIT interrupt problem

yukunwu — Mon, 05 Jun 2017 06:17:04 GMT

hello ,everyone:

I have test the NXP-example about hello+pll+interrupt. It works well,PIT0 generates the interrupt in Core 0 and toggles the DS4 LED at every 1s.

I'm trying to do it by myself and i created a project.

1.enable the interrupt

2.set clock

3.Enable PIT module and Initialize PIT0

4.In interrupt routines,DS4 = ~DS4;

but it doesn't work...why?

attachment is my project.

Best Regards

Yukun Wu

Original Attachment has been moved to: button.zip

Re: MPC5748G PIT interrupt problem

petervlna — Mon, 05 Jun 2017 07:43:11 GMT

Hi,your example seems fine,

However I can't see where you set interrupt priority.

If your priority for interrupt source is 0, then no interrupt will happen.

Peter

Re: MPC5748G PIT interrupt problem

yukunwu — Mon, 05 Jun 2017 07:50:02 GMT

Hello, Peter:

Thanks for your apply.

I set the interrupt priority at “pit.c”

I think i found this problem . I didn't define PIT0 in "intc_SW_mode_isr_vectors_MPC5748G.c",It should be 226 ,and the dummy should point to PIT0_isr().

Am i right？

Best Regards

Yukun Wu

Re: MPC5748G PIT interrupt problem

petervlna — Mon, 05 Jun 2017 08:25:00 GMT

Yes, you have to place your ISR into ISR vector table if you want IVOR4 handler to jump to your ISR.
Peter

Re: MPC5748G PIT interrupt problem

yukunwu — Mon, 05 Jun 2017 08:33:57 GMT

Hi,Peter:

yeah~That's the point,i forgot to define it.

Now it works well.

Thank your very much!!

Best Regards

Yukun Wu