when exactly void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) will be triggered and i have enabled the error interrupt in IOC setting but i could not understand occasion of this happening .

[MMARI.1]

HAL_I2C_IsDeviceReady is good option to check sensor presence but while i2c sensor working incase of error occurrence will error interrupt will be triggered ?

[Foued_KH · Accepted solution]

Hello @MMARI.1​ ,

Try to get the error in the void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) :

  if (HAL_I2C_GetError(I2cHandle) != HAL_I2C_ERROR_AF)
  {
    Error_Handler();
  }

Error_Handler() function is called when error occurs:

   1- When Slave don't acknowledge it's address, Master restarts communication.

   2- When Master don't acknowledge the last data transferred, Slave don't care in this example.

Foued