I would just take 8 samples and do 3 bit shifts to the right to divide by 8.

Or leave it as it is and use the 3 right most bits as the decimal part of your =
result.... 0/8 to 7/8's

  >>  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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