Interface LSM303AGR Acceleration sensor STM32F4xx Board

Hello,

As part of my master thesis, I am working on the STM32F411E Discovery board. This board has an LSM303AGR Accelerometer+Gyroscope via I2C communication, which I am trying to interface in Simulink to further develop a model in Simulink.

I have installed the STM Embedded coder support package however this doesnt have a block to get acceleration sensor data. I tried to look up how to interface an IMU sensor in Simulink however I could not find a tutorial that would fit my case. Has anyone worked on accel sesnsor fusion for STM board who could help me in the same. I have found various posts on the community regarding this but seems to be unsolved, posts dating back to 2016 even. It would be very useful if anyone could finally solve this sensor interface.

Thank you so much in advance for all the help.

Answer 1

[Sebastian Gross]

Hi Sanath,

it is almost impossible to provide a block for every sensor for every target hardware.

There is an example for I2C communication with LSM303AGR on Arduino: https://www.mathworks.com/help/fusion/ug/estimate-oientation-using-ahrs-filter-and-imu-data-in-simulink.html. You might have seen this one. Do you have the corresponding I2C read block for your hardware plattform?

There are also ways to develop your own device driver block: https://www.mathworks.com/help/supportpkg/arduino/device-driver-blocks.html. This would result in a block like the LSM6DSL block in the example I listed above.

Did you try those approaches?

Best

Sebastian

[Sanath]

Hello,

Thank you for your response. I understand it is not possible to provide every block, i was just hoping to find an example for the specific sensor on any STM board and I would try to make it for my target hardware. Could you please check the link you shared, it is not opening any page, i get the following error:

"The page you were looking for does not exist. Use the search box or browse topics below to find the page you were looking for."

Nevertheless, I found another example wherein they have interfaced an external sensor on an STM board using I2C,

https://de.mathworks.com/help/supportpkg/nucleo/ug/read-temperature-from-an-i2c-based-sensor-using-stmicroelectronics-nucleo-board.html

Example: "Connecting the ITG3200/ADXL345 Sensor to the STMicroelectronics Nucleo Board"

Do you think this would work?

[Sebastian Gross]

Hi,

the link did not work as the dot at the end of the sentence became part of the URL. It should work now.

The page "Read Data from I2C-Based Sensors using STMicroelectronics Nucleo Boards" says:

"The model provided is pre-configured for STMicroelectronics Nucleo F401RE board. You can configure this model for other supported Nucleo boards by browsing to Configuration Parameters > Hardware Implementation > Hardware board and selecting the required board."

With the support package I can open stmnucleo_AccelGyro_extmode and select STM32F411RE and STM32F4-Discovery as hardware boards. I think you should give this a try. Let me know how it goes.

[Sanath]

Hello, thank you for the response, seems like you suggested the two examples I am already using to tune, firstly, I tried to run this example with my target hardware and only the magnetometer part because it uses the same sensor that i have onboard,

https://de.mathworks.com/help/fusion/ug/estimate-oientation-using-ahrs-filter-and-imu-data-in-simulink.html

I am able to deploy the code without errors but when I choose monitor and tune to see the data in display block of simulink, I get the following error

"Error:External Mode Open Protocol Connect command failed

Caused by:

Could not connect to target application: XCP serial port error: open: The system cannot find the file specified [system:2]"

a quick search suggested I might have the COM port wrong but thats not the case sincemy blink program worked fine. How could i debug this? there is no COM port listed for my ST board under device manager as well. I am assuming port#1.hub#1 in properties means it is COM port 1 and blink program worked fine hence it confirmed for me.

Answer 2

[Sebastian Gross]

Hi,

just to make sure that things are running without external mode, can you turn it off:

https://www.mathworks.com/help/rtw/ug/external-mode-simulation-with-xcp-communication.html?searchHighlight=external%20mode&s_tid=srchtitle_support_results_1_external%2520mode

Best

Sebastian

[Sebastian Gross]

No, it would not. But it might help us find the problem.