Contrib i2c-0_1 (when i2c-1 exists without i2c-0)

eclipse / mraa

Linux Library for low speed IO Communication in C with bindings for C++, Python, Node.js & Java. Supports generic io platforms, as well as Intel Edison, Intel Joule, Raspberry Pi and many more.

http://mraa.io

MIT License

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Contrib i2c-0_1 (when i2c-1 exists without i2c-0) #1078

Closed g-vidal closed 2 years ago

g-vidal commented 3 years ago

Building mraa on raspberry Pi 4 with bullseye (kernel 5.*) leads to non-functional i2c bus because i2c-0 does not exist any more on standard images. Default i2c has become i2c-1; we propose here to extend the initial condition for creating i2c resources in mraa.c to the existence of i2c-0 OR i2c-1 which may not interfere with other builds. This trick can help until a cleaner solution is found.

tingleby commented 2 years ago

Looks fine to me. Do you have any reference we could document to the default moving to i2c-1 or is it just this platform.

g-vidal commented 2 years ago

I have not checked why the i2c-0 was removed, it is beyond my competencies or require a lot of time I do not have at the moment. It might be a change in the default options of compilation that get the default i2C-0 pins for another purpose. I contributed this because if it happens with the build I am using it may occur for others...I'll come back if I find some information.