[ECOS] why is it wrong to call cyg_semaphore_post() in ISR???

[Monica Dsz]

> It's a trade off - do you prevent interrupts (hence ISR routines) from
> running during all data critical sections or do you simply not allow
> those [ISR] functions to execute code that might perturb critical data?
> eCos chooses the latter method which allows for lower interrupt latency
> by putting off things until the DSR can be safely run.
>

just to confirm my understanding, does this mean that we never have to 
disable and re-enable the interrupts during critical sections? or are there 
any cases still we have to disable the interrupts in eCos.

The more I try to understand eCos, the more I am liking it. I wonder why our 
company wasnt using this cool RTOS, anyway!!! I hope I will be able to 
convince my supervisor to use eCos instead of expensive VxWorks.

Thanks again for the information.

monica

 


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