MicroC-OSII mutexs

Altera_Forum · ‎02-15-2011

does anyone know if you can define multiple mutexs in microC OS 2?

I have more than one shared resource that I would like to have different semaphores for. But I would like to use mutex semaphores.

Based on the microC OS 2 book, it seems like you can only make 1 mutex :confused:

am i missing something?

Altera_Forum · ‎02-15-2011

maybe he has a mistake in his example in chapter 8.1 of his book?

He has a line of code that says

OSMutexCreate(9,&err);

I think maybe this should read

ResourceMutex = OSMutexCreate(9,&err);

???

I guess the question is do you need to create an OS_EVENT* type and set it eqaual to OSMutexCreate() ?

It must just be a mistake in the documentation. Can someone confirm?

Altera_Forum · ‎02-16-2011

My uC/OS-2 manual reads

DispMutex = OSMutexCreate(20, &err);

Based on this i see no reason why there should be not more then 1 Mutex in a System.

What you need to do is reserve enough space for the event control blocks in the system lib settings.

karsten

Altera_Forum · ‎02-16-2011

thank you, yes I believe you are correct.