PIC Microcontoller Delay Method

Delay X cycles (11-256) exclusive

From Regulus Berdin

;**********************************************************************
; Adjustable delay from 11-256 cycles (for 14 bit core)
; W = count, cycle count excludes loading of W
; by Regulus Berdin
delay:
        addlw -(.10+1)  ;2+1 remove 1 count more for carry correction
        addlw -4        ; 1
        skpnc           ; 1/2
         goto $-2       ; 2
        sublw 0xFF      ; 1
        addwf PCL,f     ; 2
delay7  nop             ; delay adjuster
delay6  nop             ;
delay5  nop             ;
delay4  return          ;2

Questions:

Comments:

• can be improved a bit. 1 cycle less with same instruction count.

   addlw -(9+1)
   addlw -4
   skpnc
    goto $-2
   subwf PCL,f
   nop ;(this line never run)
   nop
   nop
   nop
   return
  

  +

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