Why instead of averaging 10 readings don't you average
only eight (or sixteen) readings ? Eight or sixteen are
far more easy to divide by (divide by eight <=> shift right
3 bits, divide by sixteen <=> shift right 4 bits)

Cheers

Joan

>  -----Mensaje original-----
>  De: pic microcontroller discussion list
>  [mailto:PICLIST@MITVMA.MIT.EDU]En nombre de Paul Chicofsky
>  Enviado el: miircoles, 28 de febrero de 2001 19:54
>  Para: PICLIST@MITVMA.MIT.EDU
>  Asunto: [PIC]division in assimbly
>
>
>  Hi every body,
>  I am trying to use the A/D of the PIC16F977.  I have to collect
>  10 readings
>  from the A/D register ADRESH.  Then add them and take the average of the
>  total which divide by 10.  Fore example, if i get
>  2.5 volts which is 0111 1111  in bits at ADRESH register because
>  i only care
>  about the 8 high bits,            (Right)
>  1.25 volts which is 0011 1111 in bits,      (Right)
>  .
>  .
>  .
>  so on
>  until 10 readings and then take the average.
>
>  First, i have no clue how to implement the division
>
>  Second,adding all that will be more than 8 bits.
>
>  Can any body lead me to a program that do division in PIC?.  Also, is it
>  possible to stor more than 8 bits in a register until the division come
>  along because after dividing the register the value will be
>  reduced back to
>  8 bits. It is just the matter of storing the 10 bits?
>
>  Thank you
>  regards,
>  Paul
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