Kinetis Microcontrollers中的主题 Re: PIT0 timer stops interrupting!! CW10.2, K10

PIT0 timer stops interrupting!! CW10.2, K10

ignisuti — Tue, 17 Jul 2012 01:45:30 GMT

I'm using FreeRTOS. This OS was using my SysTick timer. So, for my code, I utilized the PIT0 timer as my SysTick.

Problem is that in a few odd scenerios that I've yet to fully understand, my interrupt for this timer stops interrupting. My understanding is that the ONLY way for this to happen is if an interrupt of equal or higher priority is currently active.

I set the PIT0 interrupt to have priority 0 (highest priority). But, that made no difference.

Any suggestions?

Re: PIT0 timer stops interrupting!! CW10.2, K10

BlackNight — Tue, 17 Jul 2012 01:56:54 GMT

Hello,

are you using the Processor Expert FreeRTOS version from

http://mcuoneclipse.wordpress.com/2012/05/27/freertos-v7-1-1-released/ ?

Is only the tick timer stopping, or all your interrupts are masked/disabled?

I have seen cases with stack overflow where the interupt masks were not correctly restored, causing interrutps disabled afterwards.

I suggest you increase the stack size for your tasks and make sure that there is no stack overflow.

Hope this helps,