1 Reply Latest reply on Mar 15, 2011 5:42 AM by userc_44732

    Sine wave lookup to PWM8 output with no latency?

      Hello all -


      I am a newbie, using a PSoC 1, and I need to generate a PWM output that is a sine wave (after filtering). The sine wave values will be from a lookup table (similar to the example program using a sine wave lookup to drive a DAC).


      My question has to do with updating the PWM with each new lookup value. I cannot stop the PWM, or delay it, while loading the next sine wave value. If that happens, then the frequency of the sine wave output will be off.


      So what I need to do is to load the next PWM pulse width value (the period is always 255) without adding any extra delay to the PWM output.


      I have also been wondering if something like a counter or a one-shot would also work for this, and if one of those may make the solution easier?


      Thanks in advance for your help!