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Can ISR call semaphore?

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naresh850

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isr semaphore block

Hello

Can ISR call semaphore?

Regards,
NP
 

isr and semaphore

You can't call an semaphore from within an ISR. Taking a semaphore is a blockable operation. The rule of thumb is, when in an interrupt do not block.
ISR can only send Messages and can only release a semaphore.
 

can isr take semaphore

An ISR can do only non-blocking calls.

I.E.
An ISR can put an event into mail box without blocking.

NOTE.
Is very important for an ISR to spent small time to complete her operations.
 

call semaphore from isr

it is not advisable to call semaphones from ISR's
 

semaphore in isr

In most cases you can raise a semaphore from ISR but can not pend on it. Check your RTOS documentation.
 

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