audio.asm

Proteus在MCS-51％26ARM7系统中的应用百例 Proteus在MCS-51％26ARM7系统中的应用百例

OUTPUT	BIT   	P1.0     	;P1.0端口
      	ORG     00H
LOOP:  	CLR     C			;主程序
      	MOV    	OUTPUT,C
       	CALL    DELAY 
      	SETB    C
      	MOV    	OUTPUT,C	;输出方波
       	CALL    DELAY
       	AJMP    LOOP
DELAY:	MOV     R7, #248	;延时子程序
		DJNZ   	R7, $
		RET
    	END