BMA456 test communication error

[Bullseye]

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!

[BSTRobin]

Hi Bullseye,

I uploaed BMA456 example code on STM32F401 for your reference. Sensor API, you could use the version on github https://github.com/boschsensortec/BMA456-Sensor-API

[Bullseye]

Hello!

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!

[BSTRobin]

Hi Bullseye,

Welcome.
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.