adc_sub.a51

msc1201 编程5

$NOMOD51
$include (reg1210.inc)
PUBLIC	summer		;,unipolar
adc_sub 	SEGMENT  CODE
	RSEG  adc_sub
;;;;;;;;;;;;;;;;;;;;;
; signed long summer(void);
; return the 4 byte summation registers to R4567 (MSB~LSB)
summer:
	mov	a,AIE
	jnb	acc.6,summer
	mov	r4,sumr3
	mov	r5,sumr2
	mov	r6,sumr1
	mov	r7,sumr0
	ret
	end