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bkamen
Joined: 07 Jan 2004
Posts: 1615
Location: Central Illinois, USA
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| Finding "Function used but not defined" issues |
 Posted: Mon Oct 12, 2009 11:26 am |
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Hey guys,
As you know, I've been working on the latest stack from Microchip and there are some issues I hardly ever see writing my own code but have found while converting this unwieldy code from MCHP. (not that I can't blame anyone. TCP/IP is not exactly printf("Hello World") )
So I'm curious as to what you guys have found when dealing with an error like this: (example)
udp.h has a proto for UDPInit() that looks like this: void UDPInit(void);
- Simply enough.
UDP.h is shown having been included in the MPLAB IDE project every time I compile.
in UDP.c, this code is the implementation
| Code: | /*****************************************************************************
Function:
void UDPInit(void)
Summary:
Initializes the UDP module.
Description:
Initializes the UDP module. This function initializes all the UDP
sockets to the closed state.
Precondition:
None
Parameters:
None
Returns:
None
Remarks:
This function is called only one during lifetime of the application.
***************************************************************************/
void UDPInit(void)
{
UDP_SOCKET s;
for ( s = 0; s < MAX_UDP_SOCKETS; s++ )
{
UDPClose(s);
}
Flags.bWasDiscarded = 1;
}
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When I compile, I get this error *** Error 112 "C:\Documents and Settings\bkamen\Desktop\Ethertest-firmware\TCPIP Stack\stacktsk.c" Line 144(1,1): Function used but not defined: ... UDPInit SCR=28053
In the past, I found that if the proto and the implementation use different types in the function declaration, that causes PCD unhappiness. (like saying func(int1 a) and then implementing as func(int8 a)) which is fine and makes sense.
So what I'm asking you guys is what you look for when you have a boatload of files being compiled and the one causing the "crash" doesn't seem to have any rhyme or reason as to why. (at least that I'm used to seeing)
Thanks,
BTW, this is PCH 4.099 w/MPLAB 8.36 doing the compiling at the moment.
-Ben
p.s. I did look at some threads here like these:
http://www.ccsinfo.com/forum/viewtopic.php?t=38254
http://www.ccsinfo.com/forum/viewtopic.php?t=18649 (boy I wish it was that easy)
http://www.ccsinfo.com/forum/viewtopic.php?t=35772 (ditto)
http://www.ccsinfo.com/forum/viewtopic.php?t=34689 (ditto)
But they don't really cover the scale of something like MCHP's TCP/IP stack.
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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bkamen
Joined: 07 Jan 2004
Posts: 1615
Location: Central Illinois, USA
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| Posted: Mon Oct 12, 2009 11:45 am |
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Ok, I think I found the problem with UDPInit not being defined.
There's no file that includes the item.C versions(!). (shaking head)
I would still like to hear the senior programmer comments though.
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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