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