34 lines
891 B
NASM
Executable File
34 lines
891 B
NASM
Executable File
; Input output test
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LIST P=18F4550, F=INHX32 ; Specify processor and hex format
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#include <p18f4550.inc>
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CONFIG FOSC = HS ; Use internal oscillator, RA6 as clock output
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CONFIG WDT = OFF ; Watchdog Timer off
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CONFIG LVP = OFF ; Low-Voltage Programming off
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CONFIG MCLRE = OFF ; MCLR pin disabled, RE3 input enabled
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R1 EQU 0x020
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R2 EQU 0x021
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TEMP EQU 0x22
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ORG 0x00 ; Program starts at address 0
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Start:
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; Initialize PORTB
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CLRF TRISD ; Set all PORTB pins as output
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CLRF LATD ; Clear PORTB outputs
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BCF INTCON2, 7
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MOVLW 0fh ; Set all pins to digital I/0
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MOVWF ADCON1
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MOVLW 0xFF
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MOVWF TRISB
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CLRF LATB
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;MOVLW 0x0E
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;MOVWF PORTB
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loop: ; Read first nibble of port D and print it to the second nibble
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MOVFF PORTB, PORTD
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END ; End of program
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