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; LIST p=18F452 ;PIC18F452 is the target processor
INCLUDE "p18f452.inc" ;Include file with register defines
;Programming Configuration Information
__CONFIG _CONFIG1H, _XT_OSC_1H ;XT HS PLL (10MHz XTAL)
__CONFIG _CONFIG2L, _BOR_ON_2L & _PWRT_ON_2L ;Power-Up timer ON, Brown-out at 2.7V
__CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_1_2H ;WDT OFF for debug
__CONFIG _CONFIG3H, _CCP2MX_OFF_3H ;CCP Module Off
__CONFIG _CONFIG4L, _LVP_OFF_4L & _DEBUG_OFF_4L
;UnProtect entire device program space for DEBUG
__CONFIG _CONFIG5L, _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L
__CONFIG _CONFIG5H, _CPB_OFF_5H & _CPD_OFF_5H
__CONFIG _CONFIG6L, _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L
__CONFIG _CONFIG6H, _WRTC_OFF_6H & _WRTB_OFF_6H & _WRTD_OFF_6H
;Assorted miscellaneous general-purpose registers
DlyRegA equ 0x3D ;Temp register for delay
DlyRegB equ 0x3E ;Temp register for delay
DlyRegC equ 0x3F ;Temp register for delay
STARTUP CODE 0x000
nop ;Required for ICD Debugging
nop
goto Main
Main
clrf BSR,A ;Ensure BSR register points to first block
clrf TRISB,A
movlw 0x7
movwf PORTB,A
Loop
bsf PORTB,0 ;Turn the LED on
call LongDelay
bcf PORTB,0 ;Turn the LED off
call LongDelay
goto Loop
;A long delay
LongDelay
movlw H'10' ;Adjust to produce a suitable time delay
movwf DlyRegA
ldelayc movlw H'10'
movwf DlyRegB
ldelayb movlw H'FF'
movwf DlyRegC
ldelaya decfsz DlyRegC,f ;Inner Loop
goto ldelaya
decfsz DlyRegB,f ;Middle Loop
goto ldelayb
decfsz DlyRegA,f ;Outer Loop
goto ldelayc
return
END
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