this is the trigger routine:

;-----------------------------------------
; Trigger
;-----------------------------------------
Trigger:
mov a, COMP_L
clr c
subb a, TL0
mov a, COMP_H
subb a, TH0
jnc NotYet

mov P2, #0x01 ; fire the triac
clr LATCH1
setb LATCH1
mov P2, #0x00
clr LATCH1
setb LATCH1
NotYet:
ret

The zero crossing int just clears the TH0 and TL0 back to 0. When I compare just the TH0 value is all right... but if I try to compare the low value too the light gives a quick full bright pulse and just sit there...


(KCT)

gabriel