unexpected counter behavior

agfa

I set up 4 counters.· 2 counters in the first cog set to count positive edges and two counters in the 2nd cog to generate a signal to count.· I expected the counters to count at the same rate, but the values drift apart.

Could someone take a look and explain why?

kuroneko

agfa said...
Could someone take a look and explain why?

FRQA is fed with m0, FRQB with m1. However, m1 is simply m0 + 4. What you actually want is something like:

loc1    rdlong  frqa, m0               ' read latest frequency setpoint
        rdlong  frqb, m1

Basically you're using the parameter addresses for the increment value instead of the values stored therein.

agfa

Thanks.· That fixed it.