ChibiOS Free Embedded RTOS

Posted: **Sun Mar 01, 2015 3:14 pm**

I'm starting to use chprintf again. (stupid of me to try to prevent the code bloat because now I'm spending brain-cycles on stuff that is better done by a computer).

But I get this warning:

Code: Select all

In file included from main.c:20:0:
../ChibiOS_2.6.6/os/various/chprintf.h:69:20: note: expected 'struct BaseSequentialStream *' but argument is of type 'struct BaseSequentialStream *'
 static INLINE void chprintf(BaseSequentialStream *chp, const char *fmt, ...) {

The cast was initially put in my code as a copy-paste from the warning message as to what it wanted. But the warning doesn't go away and now it doesn't make sense...

What am I missing?

Posted: **Sun Mar 01, 2015 6:38 pm**

I would verify the order of inclusions in your main.c,

Giovanni

Posted: **Tue Mar 03, 2015 6:26 pm**

I verified it. But each time I look it stays in the same order. :-)

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#include "ch.h"
#include "hal.h"
#include "chprintf.h"

#include "string.h"
//#include <stdio.h>
#include "stdlib.h"
#include "stdarg.h"

#include "cmds.h"
#include "cmds_prototypes.h"
#include "cmds_table.h"

#include "bits.h"
#include "main.h"
#include "ow.h"

This order seems to be the same that demos use: first ch, then hal then chprintf. After the std... includes are my own.

Posted: **Tue Mar 03, 2015 6:58 pm**

Just a suggestion, put the standard headers first using the angular brackets < >.

Can you post your call to chprintf? I don't see that warning in my examples. Does this occur to you also on the provided demos?

Giovanni

Posted: **Fri Mar 06, 2015 1:27 am**

Are there multiple BaseSequentialStream types in that version of ChibiOS? I think at some point there was one in the HAL and one in the RT kernel. Maybe gcc is confused.

Also is there more of the error message missing? It says "note:" which usually follows an actual warning or error message from gcc.

Posted: **Fri Mar 06, 2015 10:04 am**

The one in HAL is not used where the HAL is used with RT, that *should* not be the problem.

Giovanni

Posted: **Sun Mar 08, 2015 11:19 am**

My "stdxxx.h" includes are now above the chibios includes. They now use angled brackets.

Code: Select all

In file included from main.c:31:0:
main.c: In function 'sd2puts':
main.h:118:26: warning: passing argument 1 of 'chprintf' from incompatible pointer type [enabled by default]
 #define ESP     ((struct BaseSequentialStream *)&SD2)
                          ^
main.c:460:13: note: in expansion of macro 'ESP'
   chprintf (ESP, "%s", p);
             ^
In file included from main.c:25:0:
../ChibiOS_2.6.6/os/various/chprintf.h:69:20: note: expected 'struct BaseSequentialStream *' but argument is of type 'struct BaseSequentialStream *'
 static INLINE void chprintf(BaseSequentialStream *chp, const char *fmt, ...) {
                    ^

The "sd2puts" used to call the write to sd2 directly, but while converting to use chprintf, I have this compatibility function that just prints the string using the "new" method...

Giovanni, the message should read something like: "expected 'float *' but argument is of type 'int *'", but apparently the types are different, but the textual representation for the warning message is the same.

So, your suggestion that it SHOULD not be the problem makes me suspicious that it actually IS the problem.

Well... My suspicions were wrong.... Searching for the definition(s) of BaseSequentialStream, I saw examples that used a cast to "(BaseSequentialStream *)&SDU1" instead of the "struct BaseSequentialStream *" that I was using.... I had copied the type from the warning message of gcc instead of from an example. Aaargh!

Correcting the casts and types resulted in many less warnings, leaving just a couple, where one was an actual bug that needed fixing....

Thanks for your help by the way!!

ChibiOS Free Embedded RTOS

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