Post by thread:HELP ME in THIS Delay routine

How for example to go about it in my MAIN before calling this routine(bellow). 1/2 a second delay routine( I guest 1:64 scaler must be set). IF u can spare time. Try before making me go crazy please Constants tmr0 equ 0x1 status equ 0x3 work equ 0h DELAY movlw .255 movwf tmr0 deloop clrw xorwf tmr0,work btfss status,Z goto deloop retlw 00 Tanks Bad Boy from ell

Muqtar Mohamed Usuf wrote: > How for example to go about it in my MAIN before calling this > routine(bellow). 1/2 a second delay routine( I guest 1:64 scaler > must be set). You should be using the .INC file to match your particular chip, not define your own constants. This allows others to follow your code easily. You should also state which PIC chip you are using, and you MUST state your clock speed. 14-bit core chips such as the 16F84 have a timer overflow flag which simplifies the procedure greatly. At 4 MHZ crystal, with prescale by 256, the timer increments each 256µs and rolls over each 65536µs. You need about 7¸ of these to time a half second, so you might want to load the timer with a suitable value and count eight rollovers. The code you post would delay about 65ms with a 256 prescale, 16ms with a 64 prescale. Is that what you found? > deloop > clrw > xorwf tmr0,work That's a long way to do: movf tmr0,W -- Cheers, Paul B.