At 05:32 PM 2/21/02 +0100, you wrote:


>Well this is ofcource correct, however there is an issue with rounding. As
>this
>would truncate the result, i.e. 2->1, 3->1, 4->2 etc.


There's also an issue if the number is negative. In the case of a 2's
complement number, you have to duplicate the sign bit if you are
doing an arithmetic right shift. The PIC doesn't have a specific
instruction for this, but you can left shift with W as the destination
to shove the sign bit into the carry, then right-shift the carry in.
For unsigned numbers, of course, you'd just clear the carry first.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
9/11 United we Stand

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads