shift.asm

PIC18F6520+SIM300做的透明传输的DTU

	#include 	<P18F6520.INC>

	EXTERN Text1,Text2,Text3
	
	CODE
SMSText
	GLOBAL	SMSText 	; export so linker can see it

	bcf		STATUS,C
	btfss	Text1,7
	goto	ST0
	bsf		STATUS,C
	bcf		Text1,7
	
ST0
	rlcf	Text2,f
	rlcf	Text3,f

	bcf		STATUS,C
	btfss	Text2,7
	goto	ST1
	bsf		STATUS,C
	bcf		Text2,7
	
ST1
	rlcf	Text3,f
	return

	END