bno055 with stm32

[Loodan22]

I wanted to see if the bno055 sensor is ready and set the PB8, PB9 pins as SDA, SCL. (my mcu = stm32f334r8)

connections

SDA_pin -> SDA pin sensor

SCL_pin -> SCL pin sensor

VCC -> VCC

GND -> GND

but the variable is never HAL_OK

thanks for answer.

[Foued_KH]

Hello @Hamdi Huntürk​ ,

Please make sure you are using the correct parameters for the communication :

• Address (The default address is 0x29)
• The frequency ( 400MHz max ) ..

Foued

[Loodan22]

@KHALSI_Foued​  I checked the maximum speed and default value but same result

[Foued_KH]

Please check pin connection :

• PB9 -> SDA pin sensor
• PB8 -> SCL pin sensor
• VCC -> 3.3V
• GND -> GND

Because It's works (0x28<<1) with

HAL_I2C_Mem_Read()

Foued

[Loodan22]

actually it works this way but why didnt work HAL_I2C_IsDeviceReady function

[Loodan22]

sorry my fault same result ( I checked pin connection etc.)

[Loodan22]

Is ADR pin important for device address?

[Foued_KH]

Hello,

Please try (It works fine ) :

// Check if BNO055 is ready
uint8_t ready = 0;
while (!ready) {
    if (HAL_I2C_IsDeviceReady(&hi2c1, 0x28 << 1, 10, 1000) == HAL_OK) {
        // BNO055 is ready, perform additional initialization
        ready = 1;
    } else {
        // BNO055 is not ready yet, wait and try again
        HAL_Delay(100);
    }
}

In this example, the code checks if the BNO055 device is ready by performing an I2C read operation on the BNO055 address (0x28 << 1) with a timeout of 10 milliseconds and a maximum delay of 1 second. If the read operation is successful, the HAL_I2C_IsDeviceReady function will return HAL_OK, indicating that the device is ready.

the read operation fails or times out, the code will wait for 100 milliseconds and try again.

Foued

[Loodan22]

I checked sca scl pin and work. But same error with ur code