> Bob Ammerman wrote:
>>
>> Here is the skeleton of a (untested) program to read 8 RC servo inputs at
>> once.
>>
> I did not ask for so much!
> I was just starting to think about how to give up on IOC, you fired 
> faster!
> Thanks. It seems a very good code, I didn't find anything wrong.
> 64 instructions is worst case (all bits are rising), 48 is best case, so
> main
> program will have "plenty" of time.

Actually, if you count the BTFSx instructions correctly you will see that 
the interrupt handler is always exactly the same length.
For example, given...

    btfss        somereg,somebit
    movlw    1

Then, if the btfss skips then it takes two cycles, if it doesn't skip it 
takes 1 cycle and the movlw takes 1 cycle. In either case 2 cycles are used.

-- Bob Ammerman
RAm Systems


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