/*******************************************************************************
* Function Name : I2C_GetFlagStatus
* Description : Checks whether the specified I2C flag is set or not.
* Input : - I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* - I2C_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* - I2C_FLAG_DUALF: Dual flag (Slave mode)
* - I2C_FLAG_SMBHOST: SMBus host header (Slave mode)
* - I2C_FLAG_SMBDEFAULT: SMBus default header (Slave mode)
* - I2C_FLAG_GENCALL: General call header flag (Slave mode)
* - I2C_FLAG_TRA: Transmitter/Receiver flag
* - I2C_FLAG_BUSY: Bus busy flag
* - I2C_FLAG_MSL: Master/Slave flag
* - I2C_FLAG_SMBALERT: SMBus Alert flag
* - I2C_FLAG_TIMEOUT: Timeout or Tlow error flag
* - I2C_FLAG_PECERR: PEC error in reception flag
* - I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode)
* - I2C_FLAG_AF: Acknowledge failure flag
* - I2C_FLAG_ARLO: Arbitration lost flag (Master mode)
* - I2C_FLAG_BERR: Bus error flag
* - I2C_FLAG_TXE: Data register empty flag (Transmitter)
* - I2C_FLAG_RXNE: Data register not empty (Receiver) flag
* - I2C_FLAG_STOPF: Stop detection flag (Slave mode)
* - I2C_FLAG_ADD10: 10-bit header sent flag (Master mode)
* - I2C_FLAG_BTF: Byte transfer finished flag
* - I2C_FLAG_ADDR: Address sent flag (Master mode) “ADSL”
* Address matched flag (Slave mode)”ENDAD”
* - I2C_FLAG_SB: Start bit flag (Master mode)
* Output : None
* Return : The new state of I2C_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, u32 I2C_FLAG)
{
FlagStatus bitstatus = RESET;
u32 i2cstatus = 0;
u32 Flag1 = 0, Flag2 = 0;
/* Check the parameters */
assert(IS_I2C_GET_FLAG(I2C_FLAG));
/* Read the I2Cx status register */
Flag1 = I2Cx->SR1;
Flag2 = I2Cx->SR2;
Flag2 = (Flag2 & I2C_FLAG_Mask) << 16;
/* Get the I2C status value */
i2cstatus = Flag1 | Flag2;
/* Get bit[27:0] of the flag */
I2C_FLAG &= I2C_FLAG_Mask;
/* Check the status of the specified I2C flag */
if ((i2cstatus & I2C_FLAG) != (u32)RESET)
{
/* I2C_FLAG is set */
bitstatus = SET;
}
else
{
/* I2C_FLAG is reset */
bitstatus = RESET;
}
/* Return the I2C_FLAG status */
return bitstatus;
}
/**
* @brief Checks whether the specified I2C flag is set or not.
* @param I2Cx: where x can be 1 or 2 to select the I2C peripheral.
* @param I2C_FLAG: specifies the flag to check.
* This parameter can be one of the following values:
* @arg I2C_FLAG_DUALF: Dual flag (Slave mode)
* @arg I2C_FLAG_SMBHOST: SMBus host header (Slave mode)
* @arg I2C_FLAG_SMBDEFAULT: SMBus default header (Slave mode)
* @arg I2C_FLAG_GENCALL: General call header flag (Slave mode)
* @arg I2C_FLAG_TRA: Transmitter/Receiver flag
* @arg I2C_FLAG_BUSY: Bus busy flag
* @arg I2C_FLAG_MSL: Master/Slave flag
* @arg I2C_FLAG_SMBALERT: SMBus Alert flag
* @arg I2C_FLAG_TIMEOUT: Timeout or Tlow error flag
* @arg I2C_FLAG_PECERR: PEC error in reception flag
* @arg I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode)
* @arg I2C_FLAG_AF: Acknowledge failure flag
* @arg I2C_FLAG_ARLO: Arbitration lost flag (Master mode)
* @arg I2C_FLAG_BERR: Bus error flag
* @arg I2C_FLAG_TXE: Data register empty flag (Transmitter)
* @arg I2C_FLAG_RXNE: Data register not empty (Receiver) flag
* @arg I2C_FLAG_STOPF: Stop detection flag (Slave mode)
* @arg I2C_FLAG_ADD10: 10-bit header sent flag (Master mode)
* @arg I2C_FLAG_BTF: Byte transfer finished flag
* @arg I2C_FLAG_ADDR: Address sent flag (Master mode) "ADSL"
* Address matched flag (Slave mode)"ENDA"
* @arg I2C_FLAG_SB: Start bit flag (Master mode)
* @retval The new state of I2C_FLAG (SET or RESET).
*/
FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG)
{
FlagStatus bitstatus = RESET;
__IO uint32_t i2creg = 0, i2cxbase = 0;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_GET_FLAG(I2C_FLAG));
/* Get the I2Cx peripheral base address */
i2cxbase = (uint32_t)I2Cx;
/* Read flag register index */
i2creg = I2C_FLAG >> 28;
/* Get bit[23:0] of the flag */
I2C_FLAG &= FLAG_Mask;
if(i2creg != 0)
{
/* Get the I2Cx SR1 register address */
i2cxbase += 0x14;
}
else
{
/* Flag in I2Cx SR2 Register */
I2C_FLAG = (uint32_t)(I2C_FLAG >> 16);
/* Get the I2Cx SR2 register address */
i2cxbase += 0x18;
}
if(((*(__IO uint32_t *)i2cxbase) & I2C_FLAG) != (uint32_t)RESET)
{
/* I2C_FLAG is set */
bitstatus = SET;
}
else
{
/* I2C_FLAG is reset */
bitstatus = RESET;
}
/* Return the I2C_FLAG status */
return bitstatus;
}
