nRF52832 with MPU9250 using i2c (TWI) on SDK15.2, SD132, Segger Embedded Studio

[usmanmehmood55]

Hi. 

I'm trying to integrate the MPU9250 with nRF52832 using i2c (TWI) on my nRF52-DK

I have found various libraries but none of them are working on my hardware. All of them have compilation errors and missing files (or parts inside files)

If anyone has made a project integrating these two and using Segger Embedded Studio for compilation and flashing, please give me some advice as to how I can do it on my side too? 

Any help would be appreciated.

Best regards,

Usman

[awneil]

usmanmehmood55 said:

I have found various libraries

What libraries, exactly?

Would help if you said what you've tried - so people don't just repeat ones you've already looked at.

usmanmehmood55 said:

Most of them have compilation errors

So what about the one(s) that build OK? What testing / debugging / investigation did you do to find out what's going on and, thus, what's wrong?

Remember that the MPU9250 neither knows nor cares what microcontroller you use - all it sees is the transactions on the I2C bus.

Therefore key to this is being able to check what's happening on the I2C bus - and verify that it's correct, or see where it's going wrong.

So do you have an oscilloscope or analyser to see what's happening on the I2C bus?

[usmanmehmood55]

Hi.

I have tried the following libraries:

https://github.com/Martinsbl/nrf5-mpu-examples

https://github.com/e27182/nRF52832_pesky

https://github.com/simondlevy/MPU

https://github.com/loopj/i2c-hal

None of them compiled. I should correct that in the question, sorry about that. 

Thanks for the help. :)

Regards

[awneil]

Have you tried raising a GitHub issue on any of those? Or contacting the authors?

[usmanmehmood55]

Yes, I did. But no reply so far. I figured someone here must've done this before, so I asked here as well. 

[awneil]

usmanmehmood55 said:

Yes, I did

Jolly good.

Amazing how many people don't seem to think of that.