ICM20948 magnetometer issue

[Pepam]

Hi,

I am develloping product witch ICM20948 and need to use magnetometer. I tried to move some existing and working code for arduino. I was able to get data from magnetometer. But next day when i tried the same thing, magnetometer wasnt responding. Just sometimes it ran for a while. In datasheet I founded that reseting i2c master is possible, but after this reset it was working 50/50. Sometimes yes, sometimes not. Now it isnt working at all. I know that it has not much in common with Nordic but I completely ran out of ideas. Please, could someone help me? I thing the problem is in the i2c master, but now also resseting it doesnt work. I could try post this issue to Stackoverflow, but they immediatelly mark this question as non related to programming, so I am asking you. 

Regards

[haakonsh]

Do you have any information on this issue?

[Pepam]

Yes, sorry for lack of information. I have modified this Arduino driver to twi driver from MartinBL examples for mpu9250 and others. I am attaching my code. I have modified it and added some unnecessary functions just for testing, so some functions are not important. But the arrangement in ICM20948_begin is the same as in Arduino driver. The problem isnt in twi driver i am sure, because data from inetrial accelerometer and gyro i am able to read, but not data from magnetometer. Please see my driver. Using twi driver from MartinBL 's mpu examples modified for icm and for SDK15.2. Working witch segger embedded studio and pca10040.app_ICM20948.zip

[haakonsh]

I get that it does not work, but what is the actual issue here, what are your symptoms?

[Pepam]

That inertial i2c master connection magnetometr --- i2c master (in icm20948 there is a module which offers to connect more external sensors and read their data form icm's registers) is not correct, because I am not able to read valuable data from it. From magnetometers registers I am reading from icm's external slave 0 registers I am always getting 0 for all of them.

[haakonsh]

Pepam said:

I am reading from icm's external slave 0 registers I am always getting 0 for all of them.

 We need to see your code related to reading these registers and we need a digital analyzer scope of the read sequence.