8051 Program – stair wave

; stair wave generation
; standard 8051
; 8-bt DAC interfaced on P1
	ORG 0H
	PORT EQU P1
	STEP1 EQU 00H
	STEP2 EQU 20H
	STEP3 EQU 40H
	STEP4 EQU 80H
START:	MOV PORT,#0
MAIN:
	LCALL STAIRWAVE
	SJMP MAIN
STAIRWAVE:
	MOV PORT,#STEP1
	CALL DELAY_2SEC
	MOV PORT,#STEP2
	CALL DELAY_2SEC
	MOV PORT,#STEP3
	CALL DELAY_2SEC
	MOV PORT,#STEP4
	CALL DELAY_2SEC
	RET
DELAY_2SEC:
	MOV R0,#20
l2:	MOV R1,#250
l1:	MOV R2,#250
	DJNZ R2,$
	DJNZ R1,l1
	DJNZ R0,l2
	RET
	END

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List of topics: 8051

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