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Thread: Synchornization of Cores

  1. #1
    SevEd is on a distinguished road
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    Synchornization of Cores

    I'm working with one Aurix TC27x

    In my little application two cores are working together (Core0 is a Producer, and Core1 is a Consumer). But I have some problems to share resources.

    What is the typical mechanism to share a variable between them? How can synchronize the information? I have only used mutex and semaphores, but with only one core. So I do not know how to implement this other type of locking

    Information about intercore comunications will be appreciated.

    Thanks
    Edgar Sevilla

  2. #2
    dr.dzhevaga is on a distinguished road dr.dzhevaga's Avatar
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    Look at synchronization methods from ifx library:

    Code:
    typedef unsigned int IfxCpu_mutexLock;
    
    boolean IfxCpu_acquireMutex (IfxCpu_mutexLock * lock)
    {
        boolean retVal;
        volatile uint32 spinLockVal;
    
        retVal = FALSE;
    
        spinLockVal = 1UL;
        spinLockVal = (uint32) __cmpAndSwap (((unsigned int *) lock), spinLockVal, 0);
    
        /* Check if the SpinLock WAS set before the attempt to acquire spinlock */
        if (spinLockVal == 0)
        {
            retVal = TRUE;
        }
    
        return retVal;
    }
    
    
    void IfxCpu_releaseMutex (IfxCpu_mutexLock * lock)
    {
        /*Reset the SpinLock */
        *lock = 0;
    }

  3. #3
    Intermediate Intermediate Praktikant is on a distinguished road
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    Hi ,

    Thank you for the detailed explanation. It helped a lot.

    Best regards
    Prakt
    Last edited by Praktikant; Jul 18th, 2018 at 11:18 PM.

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