SmartDSP OS Mutexes and spinlocks

zpyatt — Thu, 10 May 2012 06:11:07 GMT

Hi again,

So I need to implement mutual exclusion and I quickly found out the EWL c/c++ mutexes are not implemented for the Starcores, and so I turned to the spinlock of the SmartDSP OS; however, it appears the spinlock is only for mutual exclusion of a shared resources amongst cores:

"Spinlocks should be used only when data is shared between cores." - from the SmartDSP_OS_User_Guide.pdf, 14 June 2011

I need mutual exclusion of a resource shared between tasks and ISRs on the same core in this case. So far I haven't seen anything to do this. I'm thinking I will make my own mutex using the bmtset intrinsic or the bmtset.w assembly instruction.

Comments/suggestions? Am I missing something/making it harder than it needs to be?

Thanks,

zpyatt

Oh yeah the setup is: CodeWarrior 10.1.5, MSC8144, SmartDSP OS, using C++

Re: SmartDSP OS Mutexes and spinlocks

Mick92 — Wed, 27 Jun 2012 18:31:14 GMT

Hi,

Mutexes are binaries semaphores, you can use a semaphore initialized to 1.

Regards,

topic SmartDSP OS Mutexes and spinlocks in Other NXP Products

SmartDSP OS Mutexes and spinlocks

Re: SmartDSP OS Mutexes and spinlocks