I2C management STM32F407 + LSM6DSV16XTR + LIS2MDLTR

[MRaff.1]

Hello, 

    I have a custom board with STM32F407 CPU,  LSM6DSV16XTR accelerometer+gyroscope and LIS2MDLTR magnetometer.

I aim to get board inclination and the position of the north using the magnetometer for a telescope. 

Using CubeMX, I have enabled the LSM6DSV16B and the LIS2MDLTR in the Middleware package.

When generating, CubeMX removes the I2C1 initialization from main. But I need the I2C1 peripheral for other devices in the board, not only for MEMS. What is the correct way to manage this?

Thank you.

[MRaff.1 · Accepted solution]

OK, fixed by adding the following lines in the provided USE_CODE areas in main.c:

extern I2C_HandleTypeDef hi2c1;

BSP_I2C1_Init();

Now it is not completely clear to me how to get the most accurate inclination an eCompass information since there are a lot of possibilities. Is the MotionFx the definitive solution or it is better to use MotionTL and MotionEc or maybe a combination of these?

Thank you. 

[Andrew Neil]

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@MRaff.1 wrote:

OK, fixed by adding the following lines in the provided USE_CODE areas in main.c. 

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Good - please mark that as the solution: 

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256

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@MRaff.1 wrote:

Now it is not completely clear to me how to get the most accurate inclination an eCompass information since there are a lot of possibilities. Is the MotionFx the definitive solution or it is better to use MotionTL and MotionEc or maybe a combination of these?. 

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I think that's a new question - so better in a new thread.

Please give a link here so people can find it.

[MRaff.1]

Thank you Andrew you are right, here the link.

https://community.st.com/t5/stm32cubemx-mcus/x-cube-mems1-application-inclinometer-and-ecompass/m-p/711271#M29182