Zero cross detect - switching audio

[HankMcSpank]

Hi Hank, I have to agree with Jerson here, his code suggestion is IMHO a better solution. hanging out in the ISR for .33uS seems a little wastful of the clock cycles available. And if the 1.5K is slower? then you are hanging out for a good while!

Hi Bert, for this application, the PIC won't be doing anything else (it's not like my main loop is waiting on the INT_RETURN) ....so once I'm in the interrupt routine, I can actually stay there for yonks (yes, I know everyone says, get in, get out asap......but surely that's for when your main is wating on the int_return?)

My *main* overpowering requirement here is that once the comparator flips, that I can raise the audio Switch IC control voltage as PICly ;-) as possible ....if you all think that a comparator interrupt will facilitate this quicker say vs a while/wend on the comparator output while inside a Switch derived IOC interrupt routine, then cool...I'll roll with it! (but in my noobesque, head, I'd always took it that there's a certain overhead getting out of the main loop & into an interrupt routine)