hoo2
/
STM32F10x_Std_Lib

/*
 * stm32f10x_i2c.h
 *
 * Copyright (C) 2013 Houtouridis Christos <houtouridis.ch@gmail.com>
 *
 * All Rights Reserved.
 *
 * NOTICE:  All information contained herein is, and remains
 * the property of Houtouridis Christos. The intellectual
 * and technical concepts contained herein are proprietary to
 * Houtouridis Christos and are protected by copyright law.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Houtouridis Christos.
 *
 * Author:     Houtouridis Christos <houtouridis.ch@gmail.com>
 * Date:       4 ��� 2013
 *
 */


#ifndef __STM32F10x_I2C_H__
#define __STM32F10x_I2C_H__

#ifdef __cplusplus
extern "C" {
#endif

#include "stm32f10x.h"
#include "stm32f10x_assert.h"

/*==============   User Defines    ================*/
#define I2C_USE_IT            (0)
#define I2C_USE_SMBUS         (0)
#define I2C_USE_PEC           (0)

// I2C_Exported_Constants
#define IS_I2C_ALL_PERIPH(PERIPH) (((PERIPH) == I2C1) || \
                                   ((PERIPH) == I2C2))

// I2C_mode
#define I2C_Mode_I2C                    ((uint16_t)0x0000)
#define I2C_Mode_SMBusDevice            ((uint16_t)0x0002)
#define I2C_Mode_SMBusHost              ((uint16_t)0x000A)
#define IS_I2C_MODE(MODE) (((MODE) == I2C_Mode_I2C) || \
                           ((MODE) == I2C_Mode_SMBusDevice) || \
                           ((MODE) == I2C_Mode_SMBusHost))

// I2C_duty_cycle_in_fast_mode
#define I2C_DutyCycle_16_9              ((uint16_t)0x4000) /*!< I2C fast mode Tlow/Thigh = 16/9 */
#define I2C_DutyCycle_2                 ((uint16_t)0xBFFF) /*!< I2C fast mode Tlow/Thigh = 2 */
#define IS_I2C_DUTY_CYCLE(CYCLE) (((CYCLE) == I2C_DutyCycle_16_9) || \
                                  ((CYCLE) == I2C_DutyCycle_2))

// I2C_acknowledgement
#define I2C_Ack_Enable                  ((uint16_t)0x0400)
#define I2C_Ack_Disable                 ((uint16_t)0x0000)
#define IS_I2C_ACK_STATE(STATE) (((STATE) == I2C_Ack_Enable) || \
                                 ((STATE) == I2C_Ack_Disable))

// I2C_transfer_direction
#define  I2C_Direction_Transmitter      ((uint8_t)0x00)
#define  I2C_Direction_Receiver         ((uint8_t)0x01)
#define IS_I2C_DIRECTION(DIRECTION) (((DIRECTION) == I2C_Direction_Transmitter) || \
                                     ((DIRECTION) == I2C_Direction_Receiver))

// I2C_acknowledged_address
#define I2C_AcknowledgedAddress_7bit    ((uint16_t)0x4000)
#define I2C_AcknowledgedAddress_10bit   ((uint16_t)0xC000)
#define IS_I2C_ACKNOWLEDGE_ADDRESS(ADDRESS) (((ADDRESS) == I2C_AcknowledgedAddress_7bit) || \
                                             ((ADDRESS) == I2C_AcknowledgedAddress_10bit))

// I2C_registers
#define I2C_Register_CR1                ((uint8_t)0x00)
#define I2C_Register_CR2                ((uint8_t)0x04)
#define I2C_Register_OAR1               ((uint8_t)0x08)
#define I2C_Register_OAR2               ((uint8_t)0x0C)
#define I2C_Register_DR                 ((uint8_t)0x10)
#define I2C_Register_SR1                ((uint8_t)0x14)
#define I2C_Register_SR2                ((uint8_t)0x18)
#define I2C_Register_CCR                ((uint8_t)0x1C)
#define I2C_Register_TRISE              ((uint8_t)0x20)
#define IS_I2C_REGISTER(REGISTER) (((REGISTER) == I2C_Register_CR1) || \
                                   ((REGISTER) == I2C_Register_CR2) || \
                                   ((REGISTER) == I2C_Register_OAR1) || \
                                   ((REGISTER) == I2C_Register_OAR2) || \
                                   ((REGISTER) == I2C_Register_DR) || \
                                   ((REGISTER) == I2C_Register_SR1) || \
                                   ((REGISTER) == I2C_Register_SR2) || \
                                   ((REGISTER) == I2C_Register_CCR) || \
                                   ((REGISTER) == I2C_Register_TRISE))

// I2C_SMBus_alert_pin_level
#define I2C_SMBusAlert_Low              ((uint16_t)0x2000)
#define I2C_SMBusAlert_High             ((uint16_t)0xDFFF)
#define IS_I2C_SMBUS_ALERT(ALERT) (((ALERT) == I2C_SMBusAlert_Low) || \
                                   ((ALERT) == I2C_SMBusAlert_High))

// I2C_PEC_position
#define I2C_PECPosition_Next            ((uint16_t)0x0800)
#define I2C_PECPosition_Current         ((uint16_t)0xF7FF)
#define IS_I2C_PEC_POSITION(POSITION) (((POSITION) == I2C_PECPosition_Next) || \
                                       ((POSITION) == I2C_PECPosition_Current))

// I2C_NCAK_position
#define I2C_NACKPosition_Next           ((uint16_t)0x0800)
#define I2C_NACKPosition_Current        ((uint16_t)0xF7FF)
#define IS_I2C_NACK_POSITION(POSITION)  (((POSITION) == I2C_NACKPosition_Next) || \
                                         ((POSITION) == I2C_NACKPosition_Current))

// I2C_interrupts_definition
#define I2C_IT_BUF                      ((uint16_t)0x0400)
#define I2C_IT_EVT                      ((uint16_t)0x0200)
#define I2C_IT_ERR                      ((uint16_t)0x0100)
#define IS_I2C_CONFIG_IT(IT) ((((IT) & (uint16_t)0xF8FF) == 0x00) && ((IT) != 0x00))


// I2C_interrupts_definition
#define I2C_IT_SMBALERT                 ((uint32_t)0x01008000)
#define I2C_IT_TIMEOUT                  ((uint32_t)0x01004000)
#define I2C_IT_PECERR                   ((uint32_t)0x01001000)
#define I2C_IT_OVR                      ((uint32_t)0x01000800)
#define I2C_IT_AF                       ((uint32_t)0x01000400)
#define I2C_IT_ARLO                     ((uint32_t)0x01000200)
#define I2C_IT_BERR                     ((uint32_t)0x01000100)
#define I2C_IT_TXE                      ((uint32_t)0x06000080)
#define I2C_IT_RXNE                     ((uint32_t)0x06000040)
#define I2C_IT_STOPF                    ((uint32_t)0x02000010)
#define I2C_IT_ADD10                    ((uint32_t)0x02000008)
#define I2C_IT_BTF                      ((uint32_t)0x02000004)
#define I2C_IT_ADDR                     ((uint32_t)0x02000002)
#define I2C_IT_SB                       ((uint32_t)0x02000001)

#define IS_I2C_CLEAR_IT(IT) ((((IT) & (uint16_t)0x20FF) == 0x00) && ((IT) != (uint16_t)0x00))

#define IS_I2C_GET_IT(IT) (((IT) == I2C_IT_SMBALERT) || ((IT) == I2C_IT_TIMEOUT) || \
                           ((IT) == I2C_IT_PECERR) || ((IT) == I2C_IT_OVR) || \
                           ((IT) == I2C_IT_AF) || ((IT) == I2C_IT_ARLO) || \
                           ((IT) == I2C_IT_BERR) || ((IT) == I2C_IT_TXE) || \
                           ((IT) == I2C_IT_RXNE) || ((IT) == I2C_IT_STOPF) || \
                           ((IT) == I2C_IT_ADD10) || ((IT) == I2C_IT_BTF) || \
                           ((IT) == I2C_IT_ADDR) || ((IT) == I2C_IT_SB))

// I2C_flags_definition
#define I2C_FLAG_DUALF                  ((uint32_t)0x00800000)
#define I2C_FLAG_SMBHOST                ((uint32_t)0x00400000)
#define I2C_FLAG_SMBDEFAULT             ((uint32_t)0x00200000)
#define I2C_FLAG_GENCALL                ((uint32_t)0x00100000)
#define I2C_FLAG_TRA                    ((uint32_t)0x00040000)
#define I2C_FLAG_BUSY                   ((uint32_t)0x00020000)
#define I2C_FLAG_MSL                    ((uint32_t)0x00010000)


#define I2C_FLAG_SMBALERT               ((uint32_t)0x10008000)
#define I2C_FLAG_TIMEOUT                ((uint32_t)0x10004000)
#define I2C_FLAG_PECERR                 ((uint32_t)0x10001000)
#define I2C_FLAG_OVR                    ((uint32_t)0x10000800)
#define I2C_FLAG_AF                     ((uint32_t)0x10000400)
#define I2C_FLAG_ARLO                   ((uint32_t)0x10000200)
#define I2C_FLAG_BERR                   ((uint32_t)0x10000100)
#define I2C_FLAG_TXE                    ((uint32_t)0x10000080)
#define I2C_FLAG_RXNE                   ((uint32_t)0x10000040)
#define I2C_FLAG_STOPF                  ((uint32_t)0x10000010)
#define I2C_FLAG_ADD10                  ((uint32_t)0x10000008)
#define I2C_FLAG_BTF                    ((uint32_t)0x10000004)
#define I2C_FLAG_ADDR                   ((uint32_t)0x10000002)
#define I2C_FLAG_SB                     ((uint32_t)0x10000001)

#define IS_I2C_CLEAR_FLAG(FLAG) ((((FLAG) & (uint16_t)0x20FF) == 0x00) && ((FLAG) != (uint16_t)0x00))

#define IS_I2C_GET_FLAG(FLAG) (((FLAG) == I2C_FLAG_DUALF) || ((FLAG) == I2C_FLAG_SMBHOST) || \
                               ((FLAG) == I2C_FLAG_SMBDEFAULT) || ((FLAG) == I2C_FLAG_GENCALL) || \
                               ((FLAG) == I2C_FLAG_TRA) || ((FLAG) == I2C_FLAG_BUSY) || \
                               ((FLAG) == I2C_FLAG_MSL) || ((FLAG) == I2C_FLAG_SMBALERT) || \
                               ((FLAG) == I2C_FLAG_TIMEOUT) || ((FLAG) == I2C_FLAG_PECERR) || \
                               ((FLAG) == I2C_FLAG_OVR) || ((FLAG) == I2C_FLAG_AF) || \
                               ((FLAG) == I2C_FLAG_ARLO) || ((FLAG) == I2C_FLAG_BERR) || \
                               ((FLAG) == I2C_FLAG_TXE) || ((FLAG) == I2C_FLAG_RXNE) || \
                               ((FLAG) == I2C_FLAG_STOPF) || ((FLAG) == I2C_FLAG_ADD10) || \
                               ((FLAG) == I2C_FLAG_BTF) || ((FLAG) == I2C_FLAG_ADDR) || \
                               ((FLAG) == I2C_FLAG_SB))


/*
 * ====================================================================
 *  I2C Master Events (Events grouped in order of communication)
 * ====================================================================
 */

/*!
 * \brief  Communication start
 *
 * After sending the START condition (I2C_GenerateSTART() function) the master
 * has to wait for this event. It means that the Start condition has been correctly
 * released on the I2C bus (the bus is free, no other devices is communicating).
 *
 */
/* --EV5 */
#define  I2C_EVENT_MASTER_MODE_SELECT        ((uint32_t)0x00030001)  /* BUSY, MSL and SB flag */

/*!
  * \brief  Address Acknowledge
  *
  * After checking on EV5 (start condition correctly released on the bus), the
  * master sends the address of the slave(s) with which it will communicate
  * (I2C_Send7bitAddress() function, it also determines the direction of the communication:
  * Master transmitter or Receiver). Then the master has to wait that a slave acknowledges
  * his address. If an acknowledge is sent on the bus, one of the following events will
  * be set:
  *
  *  1) In case of Master Receiver (7-bit addressing): the I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED
  *     event is set.
  *
  *  2) In case of Master Transmitter (7-bit addressing): the I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED
  *     is set
  *
  *  3) In case of 10-Bit addressing mode, the master (just after generating the START
  *  and checking on EV5) has to send the header of 10-bit addressing mode (I2C_SendData()
  *  function). Then master should wait on EV9. It means that the 10-bit addressing
  *  header has been correctly sent on the bus. Then master should send the second part of
  *  the 10-bit address (LSB) using the function I2C_Send7bitAddress(). Then master
  *  should wait for event EV6.
  *
  */

/* --EV6 */
#define  I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED        ((uint32_t)0x00070082)  /* BUSY, MSL, ADDR, TXE and TRA flags */
#define  I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED           ((uint32_t)0x00030002)  /* BUSY, MSL and ADDR flags */
/* --EV9 */
#define  I2C_EVENT_MASTER_MODE_ADDRESS10                   ((uint32_t)0x00030008)  /* BUSY, MSL and ADD10 flags */

/*!
 * \brief Communication events
 *
 * If a communication is established (START condition generated and slave address
 * acknowledged) then the master has to check on one of the following events for
 * communication procedures:
 *
 * 1) Master Receiver mode: The master has to wait on the event EV7 then to read
 *    the data received from the slave (I2C_ReceiveData() function).
 *
 * 2) Master Transmitter mode: The master has to send data (I2C_SendData()
 *    function) then to wait on event EV8 or EV8_2.
 *    These two events are similar:
 *     - EV8 means that the data has been written in the data register and is
 *       being shifted out.
 *     - EV8_2 means that the data has been physically shifted out and output
 *       on the bus.
 *     In most cases, using EV8 is sufficient for the application.
 *     Using EV8_2 leads to a slower communication but ensure more reliable test.
 *     EV8_2 is also more suitable than EV8 for testing on the last data transmission
 *     (before Stop condition generation).
 *
 *  \note In case the  user software does not guarantee that this event EV7 is
 *  managed before the current byte end of transfer, then user may check on EV7
 *  and BTF flag at the same time (ie. (I2C_EVENT_MASTER_BYTE_RECEIVED | I2C_FLAG_BTF)).
 *  In this case the communication may be slower.
 *
 */

/* Master RECEIVER mode -----------------------------*/
/* --EV7 */
#define  I2C_EVENT_MASTER_BYTE_RECEIVED                    ((uint32_t)0x00030040)  /* BUSY, MSL and RXNE flags */

/* --EV7_2 */
#define   I2C_EVENT_MASTER_BYTE_TRANFERED                  ((uint32_t)0x00030044)


/* Master TRANSMITTER mode --------------------------*/
/* --EV8 */
#define I2C_EVENT_MASTER_BYTE_TRANSMITTING                 ((uint32_t)0x00070080) /* TRA, BUSY, MSL, TXE flags */
/* --EV8_2 */
#define  I2C_EVENT_MASTER_BYTE_TRANSMITTED                 ((uint32_t)0x00070084)  /* TRA, BUSY, MSL, TXE and BTF flags */


/*
 * =======================================================================
 *        I2C Slave Events (Events grouped in order of communication)
 * =======================================================================
 */

/*!
 * \brief  Communication start events
 *
 * Wait on one of these events at the start of the communication. It means that
 * the I2C peripheral detected a Start condition on the bus (generated by master
 * device) followed by the peripheral address. The peripheral generates an ACK
 * condition on the bus (if the acknowledge feature is enabled through function
 * I2C_AcknowledgeConfig()) and the events listed above are set :
 *
 * 1) In normal case (only one address managed by the slave), when the address
 *   sent by the master matches the own address of the peripheral (configured by
 *   I2C_OwnAddress1 field) the I2C_EVENT_SLAVE_XXX_ADDRESS_MATCHED event is set
 *   (where XXX could be TRANSMITTER or RECEIVER).
 *
 * 2) In case the address sent by the master matches the second address of the
 *   peripheral (configured by the function I2C_OwnAddress2Config() and enabled
 *   by the function I2C_DualAddressCmd()) the events I2C_EVENT_SLAVE_XXX_SECONDADDRESS_MATCHED
 *   (where XXX could be TRANSMITTER or RECEIVER) are set.
 *
 * 3) In case the address sent by the master is General Call (address 0x00) and
 *   if the General Call is enabled for the peripheral (using function I2C_GeneralCallCmd())
 *   the following event is set I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED.
 *
 */

/* --EV1  (all the events below are variants of EV1) */
/* 1) Case of One Single Address managed by the slave */
#define  I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED          ((uint32_t)0x00020002) /* BUSY and ADDR flags */
#define  I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED       ((uint32_t)0x00060082) /* TRA, BUSY, TXE and ADDR flags */

/* 2) Case of Dual address managed by the slave */
#define  I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED    ((uint32_t)0x00820000)  /* DUALF and BUSY flags */
#define  I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((uint32_t)0x00860080)  /* DUALF, TRA, BUSY and TXE flags */

/* 3) Case of General Call enabled for the slave */
#define  I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED        ((uint32_t)0x00120000)  /* GENCALL and BUSY flags */

/*!
 * \brief  Communication events
 *
 * Wait on one of these events when EV1 has already been checked and:
 *
 * - Slave RECEIVER mode:
 *     - EV2: When the application is expecting a data byte to be received.
 *     - EV4: When the application is expecting the end of the communication: master
 *       sends a stop condition and data transmission is stopped.
 *
 * - Slave Transmitter mode:
 *    - EV3: When a byte has been transmitted by the slave and the application is expecting
 *      the end of the byte transmission. The two events I2C_EVENT_SLAVE_BYTE_TRANSMITTED and
 *      I2C_EVENT_SLAVE_BYTE_TRANSMITTING are similar. The second one can optionally be
 *      used when the user software doesn't guarantee the EV3 is managed before the
 *      current byte end of transfer.
 *    - EV3_2: When the master sends a NACK in order to tell slave that data transmission
 *      shall end (before sending the STOP condition). In this case slave has to stop sending
 *      data bytes and expect a Stop condition on the bus.
 *
 *  \note In case the  user software does not guarantee that the event EV2 is
 *  managed before the current byte end of transfer, then user may check on EV2
 *  and BTF flag at the same time (ie. (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_BTF)).
 * In this case the communication may be slower.
 *
 */

/* Slave RECEIVER mode --------------------------*/
/* --EV2 */
#define  I2C_EVENT_SLAVE_BYTE_RECEIVED                     ((uint32_t)0x00020040)  /* BUSY and RXNE flags */
/* --EV4  */
#define  I2C_EVENT_SLAVE_STOP_DETECTED                     ((uint32_t)0x00000010)  /* STOPF flag */

/* Slave TRANSMITTER mode -----------------------*/
/* --EV3 */
#define  I2C_EVENT_SLAVE_BYTE_TRANSMITTED                  ((uint32_t)0x00060084)  /* TRA, BUSY, TXE and BTF flags */
#define  I2C_EVENT_SLAVE_BYTE_TRANSMITTING                 ((uint32_t)0x00060080)  /* TRA, BUSY and TXE flags */
/* --EV3_2 */
#define  I2C_EVENT_SLAVE_ACK_FAILURE                       ((uint32_t)0x00000400)  /* AF flag */

/*===========================      End of Events Description           ==========================================*/

#define IS_I2C_EVENT(EVENT) (((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED) || \
                             ((EVENT) == I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED) || \
                             ((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED) || \
                             ((EVENT) == I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED) || \
                             ((EVENT) == I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED) || \
                             ((EVENT) == I2C_EVENT_SLAVE_BYTE_RECEIVED) || \
                             ((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF)) || \
                             ((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL)) || \
                             ((EVENT) == I2C_EVENT_SLAVE_BYTE_TRANSMITTED) || \
                             ((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF)) || \
                             ((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL)) || \
                             ((EVENT) == I2C_EVENT_SLAVE_STOP_DETECTED) || \
                             ((EVENT) == I2C_EVENT_MASTER_MODE_SELECT) || \
                             ((EVENT) == I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) || \
                             ((EVENT) == I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) || \
                             ((EVENT) == I2C_EVENT_MASTER_BYTE_RECEIVED) || \
                             ((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTED) || \
                             ((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTING) || \
                             ((EVENT) == I2C_EVENT_MASTER_MODE_ADDRESS10) || \
                             ((EVENT) == I2C_EVENT_SLAVE_ACK_FAILURE))


#define IS_I2C_OWN_ADDRESS1(ADDRESS1) ((ADDRESS1) <= 0x3FF)

#define IS_I2C_CLOCK_SPEED(SPEED) (((SPEED) >= 0x1) && ((SPEED) <= 400000))


/*=====================   Data Types    =========================*/
typedef struct
{
   uint32_t I2C_ClockSpeed;          /*!< Specifies the clock frequency.
                                          This parameter must be set to a value lower than 400kHz */
   uint16_t I2C_Mode;                /*!< Specifies the I2C mode.
                                          This parameter can be a value of @ref I2C_mode */
   uint16_t I2C_DutyCycle;           /*!< Specifies the I2C fast mode duty cycle.
                                          This parameter can be a value of @ref I2C_duty_cycle_in_fast_mode */
   uint16_t I2C_OwnAddress;          /*!< Specifies the first device own address.
                                          This parameter can be a 7-bit or 10-bit address. */
   uint16_t I2C_Ack;                 /*!< Enables or disables the acknowledgement.
                                          This parameter can be a value of @ref I2C_acknowledgement */
   uint16_t I2C_AcknowledgedAddress; /*!< Specifies if 7-bit or 10-bit address is acknowledged.
                                          This parameter can be a value of @ref I2C_acknowledged_address */
}I2C_InitTypeDef;


/*======================   Exported Functions    ===========================*/
void I2C_DeInit(I2C_TypeDef* I2Cx);
void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct);
void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct);
void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_DMACmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_DMALastTransferCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint8_t Address);
void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
#if I2C_USE_IT == 1
void I2C_ITConfig(I2C_TypeDef* I2Cx, uint16_t I2C_IT, FunctionalState NewState);
#endif
void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data);
uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx);
void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, uint8_t Address, uint8_t I2C_Direction);
uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register);
void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_NACKPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_NACKPosition);
#if I2C_USE_SMBUS == 1
void I2C_SMBusAlertConfig(I2C_TypeDef* I2Cx, uint16_t I2C_SMBusAlert);
#endif
#if I2C_USE_PEC == 1
void I2C_TransmitPEC(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_PECPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_PECPosition);
void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState);
uint8_t I2C_GetPEC(I2C_TypeDef* I2Cx);
#endif //#if I2C_USE_PEC == 1
#if I2C_USE_SMBUS == 1
void I2C_ARPCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
#endif
void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_FastModeDutyCycleConfig(I2C_TypeDef* I2Cx, uint16_t I2C_DutyCycle);


/*!
 * \brief
 ****************************************************************************************
 *
 *                         I2C State Monitoring Functions
 *
 ****************************************************************************************
 * This I2C driver provides three different ways for I2C state monitoring
 *  depending on the application requirements and constraints:
 *
 *
 * 1) Basic state monitoring:
 *    Using I2C_CheckEvent() function:
 *    It compares the status registers (SR1 and SR2) content to a given event
 *    (can be the combination of one or more flags).
 *    It returns SUCCESS if the current status includes the given flags
 *    and returns ERROR if one or more flags are missing in the current status.
 *    - When to use:
 *      - This function is suitable for most applications as well as for startup
 *      activity since the events are fully described in the product reference manual
 *      (RM0008).
 *      - It is also suitable for users who need to define their own events.
 *    - Limitations:
 *      - If an error occurs (ie. error flags are set besides to the monitored flags),
 *        the I2C_CheckEvent() function may return SUCCESS despite the communication
 *        hold or corrupted real state.
 *        In this case, it is advised to use error interrupts to monitor the error
 *        events and handle them in the interrupt IRQ handler.
 *
 *        @note
 *        For error management, it is advised to use the following functions:
 *          - I2C_ITConfig() to configure and enable the error interrupts (I2C_IT_ERR).
 *          - I2Cx_ER_IRQHandler() which is called when the error interrupt occurs.
 *            Where x is the peripheral instance (I2C1, I2C2 ...)
 *          - I2C_GetFlagStatus() or I2C_GetITStatus() to be called into I2Cx_ER_IRQHandler()
 *            in order to determine which error occurred.
 *          - I2C_ClearFlag() or I2C_ClearITPendingBit() and/or I2C_SoftwareResetCmd()
 *            and/or I2C_GenerateStop() in order to clear the error flag and source,
 *            and return to correct communication status.
 *
 *
 *  2) Advanced state monitoring:
 *     Using the function I2C_GetLastEvent() which returns the image of both status
 *     registers in a single word (uint32_t) (Status Register 2 value is shifted left
 *     by 16 bits and concatenated to Status Register 1).
 *     - When to use:
 *       - This function is suitable for the same applications above but it allows to
 *         overcome the limitations of I2C_GetFlagStatus() function (see below).
 *         The returned value could be compared to events already defined in the
 *         library (stm32f10x_i2c.h) or to custom values defined by user.
 *       - This function is suitable when multiple flags are monitored at the same time.
 *       - At the opposite of I2C_CheckEvent() function, this function allows user to
 *         choose when an event is accepted (when all events flags are set and no
 *         other flags are set or just when the needed flags are set like
 *         I2C_CheckEvent() function).
 *     - Limitations:
 *       - User may need to define his own events.
 *       - Same remark concerning the error management is applicable for this
 *         function if user decides to check only regular communication flags (and
 *         ignores error flags).
 *
 *
 *  3) Flag-based state monitoring:
 *     Using the function I2C_GetFlagStatus() which simply returns the status of
 *     one single flag (ie. I2C_FLAG_RXNE ...).
 *     - When to use:
 *        - This function could be used for specific applications or in debug phase.
 *        - It is suitable when only one flag checking is needed (most I2C events
 *          are monitored through multiple flags).
 *     - Limitations:
 *        - When calling this function, the Status register is accessed. Some flags are
 *          cleared when the status register is accessed. So checking the status
 *          of one Flag, may clear other ones.
 *        - Function may need to be called twice or more in order to monitor one
 *          single event.
 *
 */

/*
 *  1) Basic state monitoring
 */
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT);
/*
 *  2) Advanced state monitoring
 */
uint32_t I2C_GetLastEvent(I2C_TypeDef* I2Cx);
/*
 *  3) Flag-based state monitoring
 */
FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);


void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);
#if I2C_USE_IT == 1
ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT);
void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT);
#endif
#ifdef __cplusplus
}
#endif

#endif /*__STM32F10x_I2C_H__ */


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