modulation.asm

Library for the 8051 microcontroller. such as math routine, hexBCD, LCD, Keyboard, I2C, Remote, Ke

	BSEG	AT	0H
	FINISH:	DBIT	1
	;===========================
	CSEG	AT	0H
	LJMP	START
	ORG	0BH
	LJMP	SINF
	ORG	40H
	SINF:
	MOV	A,R0
	MOVC	A,@A+DPTR
	MOV	P1,A
	DJNZ	R0,ENDSIN
	CLR	TR0
	SETB	FINISH
	ENDSIN:
	RETI
	;===========================
	INIT:
	MOV	IE,#82H
	MOV	TMOD,#22H	
	MOV	TCON,#0H
	MOV	SCON,#50H
	MOV	TH1,#0E8H	
	MOV	TL1,#0E8H
	MOV	TH0,#0E0H
	MOV	TL0,#0E0H
	SETB	TR1
	MOV	P1,#7FH
	SETB	FINISH
	RET
	;===========================
	START:
	CALL	INIT
	;===========================
	READ:
	JNB	FINISH,READ
	CLR	TR0
	MOV	P1,#7FH
	READ1:
	MOV	P1,#7FH
	MOV	DPTR,#TABLE2
	MOV	TL0,#0E0H
	MOV	R0,#17H
	SETB	TR0
	CLR	FINISH
	JNB	FINISH,$
	;===========================
	NNN:
	JNB	RI,READ1
	MOV	A,SBUF
	CLR	RI
	MOV	R1,#08H	
	MOV	R5,A
	;===========================
	MOV	P1,#7FH
	MOV	DPTR,#TABLE1
	MOV	TL0,#0E0H
	MOV	R0,#017H
	SETB	TR0
	CLR	FINISH
	;===========================
	FSK:
	JNB	FINISH,FSK
	CLR	FINISH
	MOV	A,R5
	JB	ACC.0,TOW
	ONE:
	MOV	P1,#7FH
	MOV	DPTR,#TABLE1
	MOV	TL0,#0E0H
	MOV	R0,#017H		
	JMP	OKI
	TOW:               
	MOV	P1,#7FH
	MOV	DPTR,#TABLE2
	MOV	TL0,#0E0H
	MOV	R0,#17H
	;===========================
	OKI:
	SETB	TR0
	RR	A
	MOV	R5,A
	;===========================
	OK:
	DJNZ	R1,WAIT
	;===========================
	JNB	FINISH,$
	MOV	P1,#7FH
	MOV	DPTR,#TABLE2
	MOV	TL0,#0E0H
	MOV	R0,#17H
	SETB	TR0
	CLR	FINISH
	JNB	FINISH,$
	;===========================
	JMP	NNN
	;===========================
	WAIT:
	JNB	FINISH,WAIT
	CLR	TR0
	JB	FINISH,FSK
	;===========================
	TABLE2:		DB	0H,0BFH,0EDH,0FEH,0EDH,0BFH,7FH,40H,11H,0H,11H,3FH,7FH,0BFH,0EDH,0FEH,0EDH,0BFH,7FH,40H,11H,0H,11H,3FH
	TABLE1:		DB	0H,0A0H,0BEH,0D9H,0EDH,0FAH,0FEH,0FAH,0EDH,0D9H,0BEH,0A0H,07FH,05EH,040H,025H,011H,04H,00H,04H,011H,025H,03FH,05EH
	;===========================
	END