Jinx wrote...

>Still no luck with the decay - new s/w and pic of RA3/RA4 results
>
>http://home.clear.net.nz/pages/joecolquitt/davedong.html
>
>Do you have a practical example ?
>
>If nothing else at least I've got another IRQ-based beep routine

In this code fragment from the "Dave's ****" page (thank you, by the
way...), at location stage2, are you sure you're accessing TRISA and not
PORTA?  I don't see where you're setting up RP0.

loop1    nop                  ;loop here during "begin" IRQs
         btfss  stage,tone    ;jump out if ready for stage2
         goto   loop1

;=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D

stage2   movlw  b'00001000'   ;set RA3 to i/p
         movwf  trisa
                              ;and tone freq on RA4

loop2    nop                  ;loop here during "tone" IRQs
         btfss  stage,finish  ;jump out if ready for stage3
         goto   loop2

It's six in the morning, and I'm only half through my first cup of mud,
so it's entirely possible I may have missed a "bsf status, rp0"
somewhere; but I don't see it.

Cheers,

Dave

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