On Tue, 2008-02-12 at 15:36 -0700, Andrew Ayre wrote:
> The first time the compiler comes across the function it doesn't know 
> the prototype, so it assumes that it returns an int. Then when it comes 
> across the function declaration it is different.
> 
> The "type" of a function is defined by the return type and the parameter 
> types which must always match when the function is declared and when it 
> is defined.
> 
> Add the following after the #include but before the main function:
> 
> unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen);
> 
> This will define the function so nothing is assumed by the compiler.
> 
> Andy

Thanks, Andy and Ken. I seem to recall from another life long ago that
main usually went at the bottom of C files. Now I know why, and how to
cheat.

I found this website to check my CRC program:

http://www.lammertbies.nl/comm/info/crc-calculation.html?crc=104100000102FF00&method=hex

and we agree. 10 41 00 00 01 02 FF 00 CRC16's to CF F1 , cool.

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe,
Bridgeport mill conversion, doing XY now,
Zubal lathe conversion pending)


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