Associate III

Solved

LSM303AGR return only zeros

It's returning ack on the i2c on every command , and i'm getting an error if it's not the correct address.

I'm attaching image from the scope of the i2c commands and responses.

The configuration done first and then I'm reading the temperature that it always zeros.

Also when I'm reading the config registers I'm also getting zeros.

Please advice. Thanks.

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netaneluBest answer

Associate III

Thanks you all, It been fixed.

Need to take close look at that:

"Registers 00h through 3Fh are dedicated to the accelerometer while registers 40h through 6Fh are dedicated to the magnetometer. "

Principal

When will the I2C by SW and GPIO will be offered as utility to bringup a board with less things to worry about ?

Principal

Some have an app note from 2008

or here

ST Employee

Hi @netanelu , what if you read the WHO_AM_I_A (0Fh) register? Regards

netaneluAuthorBest answer

Associate III

Thanks you all, It been fixed.

Need to take close look at that:

"Registers 00h through 3Fh are dedicated to the accelerometer while registers 40h through 6Fh are dedicated to the magnetometer. "

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