BMI160 converting data with resolution

[Soup]

Hello

How do I convert the Rawdata of the Gyroscope and the accelerometer into °/s and m/s^2?

Do I need to multiply the raw data with the typ. value of the sensitivity? (LSB/°/s)

How do I know which range I am having in my programme, when I did not set any?

Kind regards

Sophie

[shellywang · Accepted solution]

Hi Sophie，

How do I convert the Rawdata of the Gyroscope and the accelerometer into °/s and m/s^2?

-----> For Acc if the register data is 16-bits

      Sensitivity(in datasheet) = (2^15)/Range .

      Example:  Range = +/-8G, then sensitivity = (2^15)/8  * 9.8   (LSB/m/s^2)

      m/s^2 = Raw_data / sensitivity

      For Gyo , if the register data is 16-bits

      Sensitivity(in datasheet) = (2^15)/Range

      Example: Range = +/-2000dps, then sensitivity = (2^15)/2000  (LSB/°/s)

      °/s = Raw_data / sensitivity

Do I need to multiply the raw data with the typ. value of the sensitivity? (LSB/°/s)

 -------> No. Raw data (LSB) divided by the corresponding sensitivity

How do I know which range I am having in my programme, when I did not set any?

 -------> please check the sensor's datasheet register map,

        Address 0x41 for Acc range setting; 0x43 for Gyro range setting

[SpaceToon]

@shellywang How do i determine, if the register is 16-bit or something else? And Is this calculation officially documented somewhere?

[Nikosant03]

The registers according to the datasheet are 2bytes for each axis for accel and gyro. See DATA register 0x04 - 0x17 pg51 or register map pg48

Hope this helps
Nick

[SpaceToon]

@Nikosant03 Thank you for your answer! The other question is: Where I can find the Information  that for a 16-bit register I have to do (2^15)/range for the sensitivity. I did not find this in te datasheet.

Thanks!