ds1822_graph.asm

web51的开发库

	.global ds1822_graph
	.comm	lasttemp, 1

	.section cpu_dir, #alloc

	.word   'd'+'s'+'1'+'8'+'2'+'2'+'_'+'g'+'r'+'a'+'p'+'h'+'.'+'c'+'g'+'i'
	.byte   0x10		  ;cgi
	.byte   0 		  ;reserved
	.word   cgibegin
	.word   cgiend

	.section cpu_files, #alloc
cgibegin:
	.pcode ds1822_graph
	.pcode pret
cgiend:

	.text

ds1822_graph:
	mov	A,tempDS1822MSB
	swap	A
	rl	A
	anl	A,#0xE0
	mov	R7,A
	mov	a,tempDS1822LSB
	rr	A
	rr	A
	rr	A
	anl	A,#0x1F
	orl	A,R7
	mov	R7,A
	mov	A,tempDS1822MSB
	jnb	Acc.7,Lpositivetemp
	mov	a,R7
	add	a,#50
	jc	saveTemp
	clr	a
	sjmp	saveTemp
Lpositivetemp:
	mov	a,R7
	add	a,#50
	jnc	saveTemp
	mov	a,#255
saveTemp:
	mov	lasttemp,a
	ret
	;; end