QT and SPI on Raspberry PI (include files problem)

[MrMe]

Your problem does not seem to be an issue with SPI but with your STL includes.
Try using the form:

//#include <stdint.h>
//#include <unistd.h>
//#include <stdio.h>
//#include <stdlib.h>
//#include <getopt.h>
//#include <fcntl.h>
 
#include <stdint>
#include <unistd>
#include <stdio>
#include <stdlib>
#include <getopt>
#include <fcntl>

//#include <stdint.h>
//#include <unistd.h>
//#include <stdio.h>
//#include <stdlib.h>
//#include <getopt.h>
//#include <fcntl.h>

#include <stdint>
#include <unistd>
#include <stdio>
#include <stdlib>
#include <getopt>
#include <fcntl>

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And see if it helps.

Thank you for your reply.

I have tried your solution but then I have got following error:

In file included from ../MyApp/main.cpp:1:0:
stdint: No such file or directory

In file included from ../MyApp/main.cpp:1:0:
stdint: No such file or directory

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I agree that the problem is with including standard headers but I do not know how to resolve this issue.

Did I correctly write line in .pro file?

INCLUDEPATH+=/usr/include

INCLUDEPATH+=/usr/include

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[MrMe]

I have solved the problem with STL includes.

The INCLUDEPATH+=/usr/include line should be removed, but this path should be added to Tools->Options->C++->File Naming->Search Paths (add /usr/include).

For SPI header linux/ioctl.h must be changed to sys/ioctl.h like in original spidev_test.c.

After this modification I successfully tested SPI but now I am facing other problems with it. I can not call close() function and I can not change spidev1.0 mode to 1. I know that this is not a topic for this forum, so I will ask it somewhere elese but if someone has any ideas about my problem, please write.

Best regards.