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CLA on Piccolo 28035

eyal saban
Prodigy 80 points

hi ,

 

Is it possible to program the CLA , that it will inform the CPU once ,  after collecting number of samples (more than one)  from ADC  ?

meaning that the task in CLA will wait to collect the required number of ADC samples , and only then will issue interrupt to the CPU.

  • 0
    TI__Mastermind 20850 points

    Hi Eyal

    The CLA can only issue interrupts on the completion of a task. What you are looking for is something akin to a DMA. If your device doesnt have a DMA you could do this:

    1. ADCINT1 -> trigger CLA Task 1
    2. Task 1: save sample in buffer
    3. increment buffer count
    4. if buffer count == N, set flag in message RAM
    5. task complete, send interrupt to C28
    6. C28 services End_of_Task interrupt
    7. ISR: if flag set, process buffer else exit ISR

    There is a little overhead in this method but you can have  a pretty high sampling rate.

  • 0 in reply to Vishal_Coelho
    Prodigy 80 points

    Thanks , it is quite helpful.......