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Message |
InterruptHandler
Joined: 10 Dec 2018
Posts: 10
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| Compilation error "Function used but not defined" |
 Posted: Wed Mar 13, 2019 4:02 am |
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Dear Sirs and Madams!
I've inherited a project from my ex coworker, working now in MPLAB X IDE ver. 5.1.0 for Windows. It compiled ok because it had only one header and implementation (RFECB_XPAND_VDC_v102.h/RFECB_XPAND_VDC_v102.c, which are basicly main.h/main.c) file. Now, to keep the code organized, I've added another header file:
| Code: |
/*
* File: XvEmiterModes.h
* Author: user
*
* Created on March 12, 2019, 12:04 PM
*/
#ifndef XVEMITERMODES_H
#define XVEMITERMODES_H
#ifdef __cplusplus
extern "C" {
#endif
/*
* @author user
* @brief This enum describes current emmiter working mode
* @enum xvTEmitterMode
*/
typedef enum
{
XV_3D_X1=0, ///< Classic 3D mode
XV_2D_X2, ///< so called Dual View
XV_2D_X4, ///< so called Quadruple View
XV_3D_X2, ///< 3D x2
XV_3D_X3 ///< 3D x3
} xvTEmitterMode;
/*
* @author user
* @brief This constant defines number of emiter modes (size of upper struct)
*/
const uint8_t XV_NUMBER_OF_EMITTER_MODES=5;
/*
* @author user
* @brief returns first emitter mode in list (its default mode - single 3D)
*/
extern xvTEmitterMode xvGetFirstMode(void);
/*
* @author user
* @brief returns last emitter mode in list (triple 3D)
*/
extern xvTEmitterMode xvGetLastMode(void);
/*
* @author user
* @brief returns next mode regarding current mode
*/
extern xvTEmitterMode xvGetNextEmitterMode(xvTEmitterMode xvCurrentEmitterMode);
/*
* @author user
* @brief returns previous mode regarding current mode
*/
extern xvTEmitterMode xvGetPreviousEmitterMode(xvTEmitterMode xvCurrentEmitterMode);
#ifdef __cplusplus
}
#endif
#endif /* XVEMITERMODES_H */
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and its implemetation file:
| Code: |
#include "XvEmiterModes.h"
xvTEmitterMode xvGetFirstMode(void)
{
return XV_3D_X1;
} // xvGetFirstMode
xvTEmitterMode xvGetLastMode(void)
{
return XV_3D_X3;
} // xvGetLastMode
xvTEmitterMode xvGetNextEmitterMode(xvTEmitterMode xvCurrentEmitterMode)
{
switch(xvCurrentEmitterMode)
{
case xvTEmitterMode.XV_3D_X1:
{
return xvTEmitterMode.XV_2D_X2;
} // case
case xvTEmitterMode.XV_2D_X2:
{
return xvTEmitterMode.XV_2D_X4;
} // case
case xvTEmitterMode.XV_2D_X4:
{
return xvTEmitterMode.XV_3D_X2;
} // case
case xvTEmitterMode.XV_3D_X2:
{
return xvTEmitterMode.XV_3D_X3;
} // case
case xvTEmitterMode.XV_3D_X3:
{
return xvTEmitterMode.XV_3D_X1;
} // case
default:
{
break;
} // default
} // switch
} // xvGetNextEmiterMode
xvTEmitterMode xvGetPreviousEmitterMode(xvTEmitterMode xvCurrentEmitterMode)
{
case xvTEmitterMode.XV_3D_X1:
{
return xvTEmitterMode.XV_3D_X3;
} // case
case xvTEmitterMode.XV_2D_X2:
{
return xvTEmitterMode.XV_3D_X1;
} // case
case xvTEmitterMode.XV_2D_X4:
{
return xvTEmitterMode.XV_2D_X2;
} // case
case xvTEmitterMode.XV_3D_X2:
{
return xvTEmitterMode.XV_2D_X4;
} // case
case xvTEmitterMode.XV_3D_X3:
{
return xvTEmitterMode.XV_3D_X2;
} // case
default:
{
break;
} // default
} // xvGetPreviousEmiterMode
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Now, in main file I include this header file with:
| Code: |
#include "XvEmiterModes.h"
|
and when I try to use function from XvEmiterModes.h:
| Code: |
xvTEmitterMode xvCurrentEmitterMode=xvGetFirstMode();
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I get following error:
| Quote: |
E:\Projects\RFECB_XPAND_VDC_v102\RFECB_XPAND_VDC_v102.c:249:1: Error#112 Function used but not defined: ... xvGetFirstMode SCR=3264
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The new file ARE NOT ADDED to project (not visible in Project tree):
[img]https://ibb.co/vqfCMJx[/img]
, however, if I add them:
[img]https://ibb.co/Pzthykq[/img]
, I get following error:
| Quote: |
E:\Projects\RFECB_XPAND_VDC_v102\XvEmiterModes.h:11:2: Error#128 A #DEVICE required before this line
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Why and how do I fix this? Eliminating files and putting everything into main file is not an option, becuase I want the code to be structured and well handled.[/img] |
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temtronic
Joined: 01 Jul 2010
Posts: 9097
Location: Greensville,Ontario
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| Posted: Wed Mar 13, 2019 5:19 am |
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We'd have to see the first 10-15 lines of code but the
'device' error points to NOT having the picprocessor.h file as the first line of code.
The 'function used but not defined' means the program is trying to use a function that hasn't yet been loaded in. Again, this is a 'sequence' issue.
You have used 'extern' which may be a problem.
seasoned CCS C programmers will know for sure.... |
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InterruptHandler
Joined: 10 Dec 2018
Posts: 10
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| Posted: Wed Mar 13, 2019 5:45 am |
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| temtronic wrote: | We'd have to see the first 10-15 lines of code but the
'device' error points to NOT having the picprocessor.h file as the first line of code.
The 'function used but not defined' means the program is trying to use a function that hasn't yet been loaded in. Again, this is a 'sequence' issue.
You have used 'extern' which may be a problem.
seasoned CCS C programmers will know for sure.... |
Hmm, if I remove all references in the code and in the project to function in those two files, the compile process is success without any warning, so pic processor is included in the first line in RFECB_XPAND_VDC_v102.h:
| Code: |
//RFECB_XPAND_VDC_vxxx header file
#include "16F636.h"
#device CONST=READ_ONLY
#include <stdint.h>
#include <stdlib.h>
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If I add #include directive after stdlib.h, I get first lineerror. Why is that? |
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temtronic
Joined: 01 Jul 2010
Posts: 9097
Location: Greensville,Ontario
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| Posted: Wed Mar 13, 2019 6:13 am |
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I'd have to see the complete error message but it may be that you have the same named function in 2 different places.
I've seen this before when two programmers create their own functions and their code is 'merged' into one program.
Say 'A' made 'myfunction()'
AND 'B' made 'myfunction()'
then in the program
...
myfunction();
myfunction();
...
error as the compiler sees TWO different myfunction();
it should be myfunctonA(); and myfunctionB(); |
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InterruptHandler
Joined: 10 Dec 2018
Posts: 10
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| Posted: Wed Mar 13, 2019 6:25 am |
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| temtronic wrote: | I'd have to see the complete error message but it may be that you have the same named function in 2 different places.
I've seen this before when two programmers create their own functions and their code is 'merged' into one program.
Say 'A' made 'myfunction()'
AND 'B' made 'myfunction()'
then in the program
...
myfunction();
myfunction();
...
error as the compiler sees TWO different myfunction();
it should be myfunctonA(); and myfunctionB(); |
Hmm, where, I cannot find it? Which file/line? |
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dluu13
Joined: 28 Sep 2018
Posts: 395
Location: Toronto, ON
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| Posted: Wed Mar 13, 2019 6:38 am |
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I think there's something with CCS where if you haven't included the .c file, then it just never sees the definition.
Check out the included driver files. For example to use the modbus driver, you #include <modbus.c> in your own program. modbus.c in turn will #include <modbus.h>
In all of my own header files, I combine the declarations and definitions. Essentially, if I were to do it, I would have put the contents of XvEmiterModes.c under all of the declarations in XvEmiterModes.h |
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InterruptHandler
Joined: 10 Dec 2018
Posts: 10
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| Posted: Wed Mar 13, 2019 7:05 am |
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| dluu13 wrote: | I think there's something with CCS where if you haven't included the .c file, then it just never sees the definition.
Check out the included driver files. For example to use the modbus driver, you #include <modbus.c> in your own program. modbus.c in turn will #include <modbus.h>
In all of my own header files, I combine the declarations and definitions. Essentially, if I were to do it, I would have put the contents of XvEmiterModes.c under all of the declarations in XvEmiterModes.h |
Hmm, it works now! I've moved all implementations to .h file and it compiles without error! Thanks! |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19215
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| Posted: Wed Mar 13, 2019 7:10 am |
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This sound like the old compilation order thing with MPLAB
To use MPLAB, _only_ put your 'main' C file in the 'source code' section.
Put your other files in the 'header' section.
Ensure your main file is setup to include everything it needs.
Your 'extern' setups, suggest you are trying to use multiple compilation
units. Honestly don't. CCS is at heart a single pass compiler.
It has been modified in recent years to support MCU's, but it still
generates more efficient code if it is allowed to do a single pass compilation. |
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jeremiah
Joined: 20 Jul 2010
Posts: 1315
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| Posted: Wed Mar 13, 2019 6:47 pm |
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| In MPLABX, if you right click on the Source Files folder in the project view and go to Properties, then on the far right should be some checkboxes for what to exclude. Exclude all .c files but your main. |
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