Hi Dennis, thanks for information .... I'm using currently the first version of asm, without loop. Because here is something else wrong, the timing is factor 10 to 15 far away ..... Think I can use only one loop for timing. If I have to insert a nop .... then there is no advantage. I'm hanging now a week on this point. have no progress. Thinking on a hardware solution with 2 DDS devices from analog devices. One for triangle and one for sine and -sine, comparator .... done. But then the BeagleBone / Sitara cpu makes no longer sense. I like BeagleBone, made a lot of nice things and it works fine. But now I need the power of the pru unit and I do not see the performance. May be my code is not placed in internal memory ... there are many possibilities to do things wrong ...... Thanks again Kasimir
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