The SoC nrf5340 I2C channel random failure with Zephyr

[Vivek]

We are using a few sensors like (IMU, Barometer ) on one of the I2C lines. All the other sensors gets detected but the IMU and Barometer does not get detected even when the CS and SDA SCL are high. The Pull up resistors (internal) does not make the SDA and SCL high and there is no 3V detected on these. However on turning the pins 43 and 45 High, the SCL and SDA becomes high and the IMU and barometer get detected.

But as the Bluetooth stack is put and activated, the detection again stops. It is arbitrary behaviour of I2C bus that is confusing us. 

Any idea what is happening here?

Schematic-4-5.pdfSchematicSLIM.pdf

[helsing]

Thank you for the updates I am looking into this and will get back to you over the weekend.

[Vivek]

IMU_Working.zip

IMU_Not_Working.zip

Hi, these are the two sets of codes.
When we load the bluetooth stack the IMU stops getting detected. 
the only difference between the two sets are the files 
prj.conf and 
CMakeLists.txt

rest all is same.

Please help us in getting the issue resolved.

[helsing]

Hi Vivek,

Thank you for sharing the files. We are looking into the code and will get back to you.