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question on accessing SPI from within Android app using JNI

Alexander Biemann
Prodigy 20 points


I've got my skeleton for implementing a library in my Android project and I'm porting the "spidev_fdx.c" to my library (my app will load this library and make JNI calls).

 

However, I'm looking through my "\android-ndk-r6\platforms\android-8\arch-arm\usr\include\linux" folder and there is no SPI include file (linux/spi/spidev.h) !

 

How do I proceed ?

  • 0
    TI__Intellectual 1195 points

    First of all, please note that google does not recommend writing applications that include kernel headers. See following note from ndk docs.

    ** VERY IMPORTANT NOTE: ******************************************************
    *
    *  The kernel-specific headers in <linux/...> and <asm/...> are not considered
    *  stable at this point. Avoid including them directly because some of them
    *  are likely to change in future releases of the platform. This is especially
    *  true for anything related to specific hardware definitions.
    *
    ******************************************************************************

    If you still want to go ahead w/ your implementation, you will need to copy the kernel header files to the android-ndk directory, i.e. \android-ndk-r6\platforms\android-8\arch-arm\usr\include\linux

    Regards,
    Carlos.