STM32F103C6T6A I2C interface not working

[RShiv.1]

..

[RShiv.1]

attached is the code ..I am using STMcubeID to run the I2C..I am trying to access sensor data using STM32 along with sensiron chip...but I I2C is not working...Let me know if you have any idea

uint16_t DevAddress = 0x61 << 1;

uint16_t MemAddress = 0x0036;

uint8_t env_var[6] = "";

char print_msg[100] = "";

uint16_t ret ;

 if (HAL_OK == HAL_I2C_IsDeviceReady(&hi2c1, DevAddress, 200, 2000)) {

  strcpy(print_msg, "SUCCESS HAL_I2C_Device_Read \n");

  HAL_UART_Transmit(&huart1, (uint8_t*) print_msg,strlen(MSG),1000);

  if (HAL_OK == HAL_I2C_Mem_Read(&hi2c1, DevAddress, MemAddress,I2C_MEMADD_SIZE_8BIT, (uint8_t*) &env_var[0],

  0x0006, HAL_MAX_DELAY)) {

  strcpy(print_msg, "SUCCESS HAL_I2C_Mem_Read\r\n");

  HAL_UART_Transmit(&huart1, (uint8_t*) print_msg,

  strlen(print_msg), 1000);

  sprintf(print_msg, "%X %X %X %X %X %X\r\n", env_var[0],

  env_var[1], env_var[2], env_var[3], env_var[4],

  env_var[5]);

  HAL_UART_Transmit(&huart1, (uint8_t*) print_msg, strlen(MSG),1000);

  } else {

  strcpy(print_msg, "ERROR in HAL_I2C_Mem_Read()\r\n");

  HAL_UART_Transmit(&huart1, (uint8_t*) print_msg, strlen(MSG),1000);

  }

  } else {

  strcpy(print_msg, "\n ERROR in HAL_I2C_IsDeviceReady()\r\n");

  HAL_UART_Transmit(&huart1, (uint8_t*) print_msg, strlen(MSG),1000);

  }

regards

Ravi

[RShiv.1]

ANy configuration needs to be done using STM cube Mx which is missing kinfly

[RShiv.1]

SCD30 interface description document attached...0x61 is the I2C address ...

[QSHAO.1]

before review of SW code, would you confirm that I2C bus is well pulled up by resistors? and more detail information may be helpful instead of "not working". for example NO ACK from sensor or something else.

[RShiv.1]

Hi QSHA0,

If you can suggest us any better solution will be good ..kindly let me know

regards

Ravi

[RShiv.1]

Hi,

I am seeing a timeout error inside HAL_I2C_Master_Transmit()...

I have pull up 4.7K resistor...where could be the issue...kindly let me know...any idea kinfly suggest

[RShiv.1]

yes I2C is well pulled up using 4.7 K resistors and on probing also the line is showing 3.3v...when oscilloscope is connected no activity is seen on the bus...

[RShiv.1]

we would like to confirm whether we have missed anything on the I2C configuration on STMcubeMx ..

Any IDE issue seen here...let us know...thanks

[RShiv.1]

Any update on this will be help us ..Thanks

[RShiv.1]

Hi ,

Just wanted to know if there needs to be change in S/W ...so that we can communicate with the sensor.

Let me know.

Thanks

[RShiv.1]

Hi,

I even tried with below code..even then why is I2C not passing..

 uint16_t DevAddress = 0x61 << 1;

 uint16_t MemAddress = 0x0036;

 uint8_t env_var[6] = "";

 char print_msg[200] = "";

 uint16_t ret ;

 ret = HAL_I2C_Master_Transmit(&hi2c1, DevAddress, env_var, 2, HAL_MAX_DELAY);

 if ( ret != HAL_OK )

   {

  strcpy(print_msg, "\n\r ERROR in HAL_I2C_Master_Tx() \r\n");

  HAL_UART_Transmit(&huart1, (uint8_t*) print_msg, strlen(MSG),1000);

 } else {

   strcpy(print_msg, "success in HAL_I2C_Master_Tx() \r\n");

   HAL_UART_Transmit(&huart1, (uint8_t*) print_msg, strlen(MSG),1000);

 }

Kindly let me know.

regards

Ravi

[RShiv.1]

Hi,

Tried the above code with ST25R3911B disco board which has STM32L476RET..

here we are not seeing any ret value..but the sensor is responding with some LED indication..

some configuration issue is stopping the ret values to indicate whether the I2C is working or not..

kindly suggest any changes in the code if any..then same configurations can be applied for STM32F103C6...kindly help us out if you have any suggestion.

thanks and regards

Ravi