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    BMA456 test communication error

    BMA456 test communication error

    New Poster

    Hello all!

    I am working with the BMA456 sensor, connected to an STM32F411RE nucleo card.

    I am still learning how to work with the sensor, therefore I decided to play by the book and follow the datasheet's instructions beginning with the test communication. (BMA PDF Datasheet – Page 11 – bma ds.png)

    I am also using the STM32CubeIDE.

    My code:

    #include "stm32f4xx_hal.h"

    #define BMA456_I2C_ADDRESS 0x19
    #define BMA456_CHIP_ID_REG 0x00
    #define BMA456_CHIP_ID_VAL 0x16

    I2C_HandleTypeDef hi2c1; 

    uint8_t BMA456_ReadChipID() {
    uint8_t chip_id = 0;
    HAL_StatusTypeDef status = HAL_I2C_Mem_Read(&hi2c1, BMA456_I2C_ADDRESS, BMA456_CHIP_ID_REG, I2C_MEMADD_SIZE_8BIT, &chip_id, 1, 1000);

    if (status != HAL_OK) {
    // Handle error here
    return 0;
    return chip_id;

    int main() {
    // ...

    uint8_t chip_id = BMA456_ReadChipID();

    if (chip_id == BMA456_CHIP_ID_VAL) {
    // Communication is OK
    } else {
    // Communication is not OK

    // ...

    After debugging a little, I found that I am receiving the error code "4". The code that I provided is of course only the piece related to the bma456 sensor. If you need the rest of my main.c code, you can find it in the attachements.

    I  would really appreciate the help, thanks a lot!

    3 REPLIES 3

    Community Moderator
    Community Moderator

    Hi Bullseye,

    I uploaed BMA456 example code on STM32F401 for your reference. Sensor API, you could use the version on github


    Thanks a lot for the quick response. I will try this out and get back to you with the results.

    Have a great day ahead.

    Edit: Having quickly looked at the files that you have provided, and considering that I am still somewhat a beginner in what regarding working with the BMA sensor. Could you help me understand how does your code work? There are a lot of definitions and functions especially in the bma456h_task files.

    Thanks again!

    Community Moderator
    Community Moderator

    Hi Bullseye,

    The entry function is StartBMA456HTask() in bma456h_task.c file. The reference code run with STM32F401, you don't need to modify any code in bma456h_task.c as you used STM32F411RE which was also same STM32F4 series. You only need to ensure you configure currect I2C interface on STM32F411RE side.