uC/OS-II C18 port question

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simulator ucos

The main loop of test application from
https://www.sputnickonline.com/projects/programs/micro/uCOS_for_PIC18/index.html

look like the following:

void main (void)
{
int i_test = 0xABCD;
INTCONbits.GIEH = 0;
OSInit();
OSTaskCreate(TestTask, (void *)&i_test, &TestTaskStk[0], 0);
OSStart();
}

As from the code above, setting GIEH to 0 disables the global interrupt. I found no code wrote for enable ISR in this example. I wonder how this work as TMR0 ISR is needed to perform some OS level tasks.
I simulate this example in MPLAB v6.51, and found that TMR0 ISR was not triggered when TMR0 overflow. Am I missing something here?

Hope someone could point me a direction.

Thanks & regards,
virus
 

ucos + projects

I'd expect the OSStart call to end up calling a processor-specific routine which enables all interrupts - this will be done only after all the other initialisation has been completed, so the processor doesn't get interrupts before it is ready.

HTH
barny
 

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    virus

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Currently, I’m working on the same port of uC/OS-II. And I have some suspicious over the operation of this RTOS as well.

Here is more information of my system.

OS: Win 2000
UC/OS version 2.51
MPLAB v 6.51

I test it using MPLAB Simulator, which I couldn’t see from watch window that the ISR was ever enabled. So I think this is the reason my system ran to OS_TaskIdle() and never exit this routine.

Is there anything that I’m doing wrongly?

Thanks,
wh
 

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    virus

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