ST STM32F31xx

Inter-integrated circuit interface (I2C)
UM1581
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DocID023800 Rev 1
13.2.15.3 I2C_GetITStatus
Function Name
ITStatus I2C_GetITStatus ( I2C_TypeDef * I2Cx, uint32_t
I2C_IT)
Function Description
Checks whether the specified I2C interrupt has occurred or not.
Parameters
 I2Cx : where x can be 1 or 2 to select the I2C peripheral.
 I2C_IT : specifies the interrupt source to check. This
parameter can be one of the following values:
 I2C_IT_TXIS : Transmit interrupt status
 I2C_IT_RXNE : Receive data register not empty
 I2C_IT_ADDR : Address matched (slave mode)
 I2C_IT_NACKF : NACK received flag
 I2C_IT_STOPF : STOP detection flag
 I2C_IT_TC : Transfer complete (master mode)
 I2C_IT_TCR : Transfer complete reload
 I2C_IT_BERR : Bus error
 I2C_IT_ARLO : Arbitration lost
 I2C_IT_OVR : Overrun/Underrun
 I2C_IT_PECERR : PEC error in reception
 I2C_IT_TIMEOUT : Timeout or Tlow detection flag
 I2C_IT_ALERT : SMBus Alert
Return values
 The new state of I2C_IT (SET or RESET).
Notes
 None.
13.2.15.4 I2C_ClearITPendingBit
Function Name
void I2C_ClearITPendingBit ( I2C_TypeDef * I2Cx, uint32_t
I2C_IT)
Function Description
Clears the I2Cx's interrupt pending bits.
Parameters
 I2Cx : where x can be 1 or 2 to select the I2C peripheral.
 I2C_IT : specifies the interrupt pending bit to clear. This
parameter can be any combination of the following values:
 I2C_IT_ADDR : Address matched (slave mode)
 I2C_IT_NACKF : NACK received flag
 I2C_IT_STOPF : STOP detection flag
 I2C_IT_BERR : Bus error
 I2C_IT_ARLO : Arbitration lost
 I2C_IT_OVR : Overrun/Underrun
 I2C_IT_PECERR : PEC error in reception
 I2C_IT_TIMEOUT : Timeout or Tlow detection flag