/**
* @brief Checks whether the last I2Cx Event is equal to the one passed
* as parameter.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_EVENT: specifies the event to be checked.
* This parameter can be one of the following values:
* @arg I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED : EV1
* @arg I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED : EV1
* @arg I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED : EV1
* @arg I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED : EV1
* @arg I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED : EV1
* @arg I2C_EVENT_SLAVE_BYTE_RECEIVED : EV2
* @arg (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF) : EV2
* @arg (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL) : EV2
* @arg I2C_EVENT_SLAVE_BYTE_TRANSMITTED : EV3
* @arg (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF) : EV3
* @arg (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL) : EV3
* @arg I2C_EVENT_SLAVE_ACK_FAILURE : EV3_2
* @arg I2C_EVENT_SLAVE_STOP_DETECTED : EV4
* @arg I2C_EVENT_MASTER_MODE_SELECT : EV5
* @arg I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED : EV6
* @arg I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED : EV6
* @arg I2C_EVENT_MASTER_BYTE_RECEIVED : EV7
* @arg I2C_EVENT_MASTER_BYTE_TRANSMITTING : EV8
* @arg I2C_EVENT_MASTER_BYTE_TRANSMITTED : EV8_2
* @arg I2C_EVENT_MASTER_MODE_ADDRESS10 : EV9
*
* @note: For detailed description of Events, please refer to section
* I2C_Events in stm32f10x_i2c.h file.
*
* @retval An ErrorStatus enumeration value:
* - SUCCESS: Last event is equal to the I2C_EVENT
* - ERROR: Last event is different from the I2C_EVENT
*/
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT)
{
uint32_t lastevent = 0;
uint32_t flag1 = 0, flag2 = 0;
ErrorStatus status = ERROR;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_EVENT(I2C_EVENT));
/* Read the I2Cx status register */
flag1 = I2Cx->SR1;
flag2 = I2Cx->SR2;
flag2 = flag2 << 16;
/* Get the last event value from I2C status register */
lastevent = (flag1 | flag2) & FLAG_Mask;
/* Check whether the last event contains the I2C_EVENT */
if ((lastevent & I2C_EVENT) == I2C_EVENT)
{
/* SUCCESS: last event is equal to I2C_EVENT */
status = SUCCESS;
}
else
{
/* ERROR: last event is different from I2C_EVENT */
status = ERROR;
}
/* Return status */
return status;
}
/*******************************************************************************
* Function Name : I2C_CheckEvent
* Description : Checks whether the last I2Cx Event is equal to the one passed
* as parameter.
* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* - I2C_EVENT: specifies the event to be checked.
* This parameter can be one of the following values:
* - I2C_EVENT_SLAVE_ADDRESS_MATCHED : EV1
* - I2C_EVENT_SLAVE_BYTE_RECEIVED : EV2
* - I2C_EVENT_SLAVE_BYTE_TRANSMITTED : EV3
* - I2C_EVENT_SLAVE_ACK_FAILURE : EV3-1
* - I2C_EVENT_MASTER_MODE_SELECT : EV5
* - I2C_EVENT_MASTER_MODE_SELECTED : EV6
* - I2C_EVENT_MASTER_BYTE_RECEIVED : EV7
* - I2C_EVENT_MASTER_BYTE_TRANSMITTED : EV8
* - I2C_EVENT_MASTER_MODE_ADDRESS10 : EV9
* - I2C_EVENT_SLAVE_STOP_DETECTED : EV4
* Output : None
* Return : An ErrorStatus enumuration value:
* - SUCCESS: Last event is equal to the I2C_Event
* - ERROR: Last event is different from the I2C_Event
*******************************************************************************/
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, u32 I2C_EVENT)
{
u32 LastEvent = 0;
u32 Flag1 = 0, Flag2 = 0;
ErrorStatus status = ERROR;
/* Check the parameters */
assert_param(IS_I2C_EVENT(I2C_EVENT));
Flag1 = I2Cx->SR1;
Flag2 = I2Cx->SR2;
Flag2 = Flag2 << 16;
/* Get the last event value from I2C status register */
LastEvent = (Flag1 | Flag2) & I2C_FLAG_Mask;
/* Check whether the last event is equal to I2C_EVENT */
if (LastEvent == I2C_EVENT )
{
/* SUCCESS: last event is equal to I2C_EVENT */
status = SUCCESS;
}
else
{
/* ERROR: last event is different from I2C_EVENT */
status = ERROR;
}
/* Return status */
return status;
}