;
; simple averaging code
; uses R2,6,7,A
;

adc_avg:

 mov r2,#8 ;loop count
 clr r6
 clr r7   ;zero avg accumulator
aa_1
 acall get_adc  ;returns adc value in A
 add a,r6
 mov r6,a
 mov a,r7
 addc a,#0
 mov r7,a  ;16bit add
 djnz r2,aa_1
;
; divide by 8 by shifting right 3 times
;
 clr c
 mov a,r7
 rrc a
 mov r7,a
 mov a,r6
 rrc a
 mov r6,a
 clr c
 mov a,r7
 rrc a
 mov r7,a
 mov a,r6
 rrc a
 mov r6,a
 clr c
 mov a,r7
 rrc a
 mov r7,a
 mov a,r6
 rrc a
 mov r6,a
;
; return result in A
;
 mov a,r6
 ret