Check out the piclist.com website (http://www.piclist.com) specifically
http://www.piclist.com/techref/microchip/math/radix/index.htm
The code is in assembler, but perhaps it will be of some help.

Josh
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A common mistake that people make when trying to design something
completely foolproof is to underestimate the ingenuity of complete
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"F.A.C.T. / Vladimir M Skrbic" wrote:
> My name is Vladimir and I'm from Yugoslavia. I am working on a
> Thermometer/thermostat project based on a PIC 16F84. I am using a Dallas
> DS1821 temperature sensor and since I don't have enough pins I decided
> to use 4511 BCD to 7 Segment LED Driver IC. Now I am writing my code in
> Pic Basic Pro and I'm not certain how to convert 8 bit binary data
> coming out from the sensor to a 4 bit BCD (B0-B3 pins -> D,C,B,A) in
> order to drive the 4511. Can you give me a hand, please? Thank you in
> advance.

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