i2c.h

意法半导体ARM7 STR710+DM9000A的TCP/IP实现

*******************************************************************************/
inline void I2C_STARTGenerate (I2C_TypeDef *I2Cx, FunctionalState NewState)
{
  if (NewState == ENABLE) I2Cx->CR |= I2C_START_Mask;
    else I2Cx->CR &= ~I2C_START_Mask;
}

/*******************************************************************************
* Function Name  : I2C_STOPGenerate
* Description    : Generates I2C communication STOP condition.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  condition(ENABLE or DISABLE).
* Return         : None.
*******************************************************************************/
inline void I2C_STOPGenerate (I2C_TypeDef *I2Cx, FunctionalState NewState)
{
  if (NewState == ENABLE) I2Cx->CR |= I2C_STOP_Mask;
    else I2Cx->CR &= ~I2C_STOP_Mask;
}

/*******************************************************************************
* Function Name  : I2C_AcknowledgeConfig
* Description    : Enables or disables I2C acknowledge feature.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  condition(ENABLE or DISABLE).
* Return         : None.
*******************************************************************************/
inline void I2C_AcknowledgeConfig (I2C_TypeDef *I2Cx, FunctionalState NewState)
{
  if (NewState == ENABLE) I2Cx->CR |= I2C_ACK_Mask;
    else I2Cx->CR &= ~I2C_ACK_Mask;
}

/*******************************************************************************
* Function Name  : I2C_ITConfig
* Description    : Enables or disables I2C interrupt feature.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  condition(ENABLE or DISABLE).
* Return         : None.
*******************************************************************************/
inline void I2C_ITConfig (I2C_TypeDef *I2Cx, FunctionalState NewState)
{
  if (NewState == ENABLE) I2Cx->CR |= I2C_ITE_Mask;
    else I2Cx->CR &= ~I2C_ITE_Mask;
}

/*******************************************************************************
* Function Name  : I2C_RegisterRead
* Description    : Reads any I2C register and returns its value.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  Reg :the register to be read (I2CCR,I2CSR1,I2CSR2,I2CCCR,
*                                                I2COAR1,I2COAR2,I2CDR,I2CECCR)
* Return         : the value of the register passed as parameter(u8)
*******************************************************************************/
inline u8 I2C_RegisterRead (I2C_TypeDef *I2Cx, I2C_Registers reg)
{
  return (*(u8 *)(*((u32 *)&I2Cx) + reg));
}

/*******************************************************************************
* Function Name  : I2C_FlagStatus
* Description    : Checks whether any I2C Flag is set or not.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  Access(DIRECT or INDIRECT)
*                  Flag : the flag to be read
*                  input 4: an (u8) variable needed in the case
*                                     of the INDIRECT access.
* Return         : The NewState of the Flag (SET or RESET).
*******************************************************************************/
FlagStatus I2C_FlagStatus (I2C_TypeDef *I2Cx, RegisterAccess Access, I2C_Flags Flag,...);
/*******************************************************************************
* Function Name  :  I2C_FlagClear
* Description    : Clears the I2C Flag passed as a parameter
* Input          : I2Cx ( I2C0 or I2C1 )
*                  Flag : the flag to be cleared.
*                  input3: an (u8) parameter needed if the flag
*                         to be cleared needs a write in one register.
* Return         : None.
*******************************************************************************/
void I2C_FlagClear (I2C_TypeDef *I2Cx, I2C_Flags Flag,...);
/*******************************************************************************
* Function Name  : I2C_SpeedConfig
* Description    : Selects I2C clock speed and configures its corresponding mode.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  Clock: I2C expected clock in Hertz.
* Return         : None.
*******************************************************************************/
void I2C_SpeedConfig (I2C_TypeDef *I2Cx, u32 Clock);
/*******************************************************************************
* Function Name  : I2C_AddressConfig
* Description    : Defines the I2C bus address of the interface.
* Input          : I2Cx ( I2C0 or I2C1 ).
*                  Address: an u16 parameter indicating the address
*                           of the interface.
*                  Mode (I2C_Mode10,I2C_Mode7).
* Return         : None.
*******************************************************************************/
void I2C_AddressConfig (I2C_TypeDef *I2Cx, u16 Address, I2C_Addressing Mode);

/*******************************************************************************
* Function Name  : I2C_FCLKConfig
* Description    : Configures frequency bits according to RCLK frequency.
*                  The I2C selected MUST be disabled.
* Input          : I2Cx ( I2C0 or I2C1 )
* Return         : None.
*******************************************************************************/
void I2C_FCLKConfig (I2C_TypeDef *I2Cx);
/*******************************************************************************
* Function Name  : I2C_AddressSend
* Description    : Transmits the address byte to select the slave device.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  Address: an u16 parameter indicating the slave address
*                  Mode (I2C_Mode10,I2C_Mode7).
*                  Direction (I2C_RX,I2C_TX).
* Return         : None.
********************************************************************************/
void I2C_AddressSend (I2C_TypeDef *I2Cx, u16 Address, I2C_Addressing Mode, I2C_Direction Direction);
/*******************************************************************************
* Function Name  : I2C_ByteSend
* Description    : Send a single byte of data.
* Input          : I2Cx ( I2C0 or I2C1 )
*                  Data : the byte to be sent to the slave
* Return         : None.
*******************************************************************************/
void I2C_ByteSend (I2C_TypeDef *I2Cx, u8 Data);
/*******************************************************************************
* Function Name  : I2C_TransmissionStatus
* Description    : Report the NewState of the transmission
* Input          : I2Cx ( I2C0 or I2C1 )
* Return         : I2C_Tx_Status :transmission status (I2C_TX_NO, I2C_TX_SB,
*                   I2C_TX_AF, I2C_TX_ARLO, I2C_TX_BERR,I2C_TX_ADD_OK,
*                   I2C_TX_DATA_OK,I2C_TX_ONGOING)
*******************************************************************************/
I2C_Tx_Status I2C_TransmissionStatus (I2C_TypeDef *I2Cx);
/*******************************************************************************
* Function Name  : I2C_ByteReceive
* Description    : Returns the received byte.
* Input          : I2Cx ( I2C0 or I2C1 )
* Return         : The received byte.
*******************************************************************************/
u8 I2C_ByteReceive (I2C_TypeDef *I2Cx);
/*******************************************************************************
* Function Name  :I2C_ReceptionStatus
* Description    : Report the reception NewState.
* Input          : I2Cx ( I2C0 or I2C1 )
* Return         : I2C_Rx_Status:the NewState of the reception ( I2C_RX_NO,
*                  I2C_RX_SB,I2C_RX_AF,I2C_RX_ARLO,I2C_RX_BERR,I2C_RX_ADD_OK,
*                  I2C_RX_DATA_OK, I2C_RX_ONGOING)
*******************************************************************************/
I2C_Rx_Status I2C_ReceptionStatus (I2C_TypeDef *I2Cx);
/*******************************************************************************
* Function Name  : I2C_ErrorClear
* Description    : Clears any error flags.
* Input          : I2Cx ( I2C0 or I2C1 )
* Return         : None.
*******************************************************************************/
inline void I2C_ErrorClear (I2C_TypeDef *I2Cx)
{
  /* Clear all error flags by reading the SR2 register */
  (void)I2Cx->SR2;
}

/*******************************************************************************
* Function Name  : I2C_GetStatus
* Description    : Reads the I2C status registers.
* Input          : None
* Return         : I2C status registers.
*******************************************************************************/
inline u32 I2C_GetStatus(I2C_TypeDef *I2Cx)
{
  u8 i2c_cr, i2c_sr1,i2c_sr2;

  i2c_cr  = I2Cx->CR;
  i2c_sr1 = I2Cx->SR1;
  i2c_sr2 = I2Cx->SR2;

 return (((i2c_cr)<<14)|(i2c_sr1|(i2c_sr2<<8))&0x3FFF);
}


u16 I2C_GetLastEvent(I2C_TypeDef *I2Cx);
FlagStatus I2C_CheckEvent(I2C_TypeDef *I2Cx, u16 I2C_EVENT);



#endif /* __i2c_H */

/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/