11-8-1.asm

书籍8051入门篇

;11-8-1.ASM
$MOD51
	ORG	0000H
START:	MOV	TMOD,#20H	; TIMER1 = MODE2
	MOV	TH1,#0FDH	; 9600b/s
	SETB	TR1		; START TIMER1
	MOV	SCON,#50H	; SERIAL MODE1, ENABLE UART
	CLR	RI		; RI=0
;
WAIT:	JNB	RI,WAIT		; WAIT FOR RECEIVE OK
	CLR	RI		; RI=0
	MOV	A,SBUF		; READ DATA
	CPL	A		; CPL ACC
	MOV	P1,A		; SHOW DATA ON P1 
	SJMP	WAIT		;WAIT NEXT BYTE
;
	END