i2c_ee.c

基于STM32F107的UDP服务器程序

/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : i2c_ee.c
* Author             : MCD Application Team
* Version            : V2.0.1
* Date               : 06/13/2008
* Description        : This file provides a set of functions needed to manage the
*                      communication between I2C peripheral and I2C M24C08 EEPROM.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_i2c.h"
#include "i2c_ee.h"
#include <stdio.h>

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define I2C_Speed              400000
#define I2C1_SLAVE_ADDRESS7    0xA0
#define I2C_PageSize           8

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
u16 EEPROM_ADDRESS;

/* Private function prototypes -----------------------------------------------*/
void I2C_GPIO_Configuration(void);
void I2C_Configuration(void);

/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configure the used I/O ports pin
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_GPIO_Configuration(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure; 

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
    
  /* Configure I2C1 pins: SCL and SDA */
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void I2C_GPIO_DeConfig(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure; 

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,DISABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
    
  /* Configure I2C1 pins: SCL and SDA */
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : I2C_Configuration
* Description    : I2C Configuration
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_Configuration(void)
{
  I2C_InitTypeDef  I2C_InitStructure; 

  /* I2C configuration */
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1 = I2C1_SLAVE_ADDRESS7;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_ClockSpeed = I2C_Speed;
  
  /* I2C Peripheral Enable */
  I2C_Cmd(I2C1, ENABLE);
  /* Apply I2C configuration after enabling it */
  I2C_Init(I2C1, &I2C_InitStructure);

	/*允许1字节1应答模式*/
	I2C_AcknowledgeConfig(I2C1, ENABLE);
    
  printf("\n\r I2C_Configuration----");
    
}

/*******************************************************************************
* Function Name  : I2C_EE_Init
* Description    : Initializes peripherals used by the I2C EEPROM driver.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_Init()
{
  /* GPIO configuration */
  I2C_GPIO_Configuration();

  /* I2C configuration */
  I2C_Configuration();

  /* depending on the EEPROM Address selected in the i2c_ee.h file */
#ifdef EEPROM_Block0_ADDRESS
  /* Select the EEPROM Block0 to write on */
  EEPROM_ADDRESS = EEPROM_Block0_ADDRESS;
#endif
#ifdef EEPROM_Block1_ADDRESS
  /* Select the EEPROM Block1 to write on */
  EEPROM_ADDRESS = EEPROM_Block1_ADDRESS;
#endif
#ifdef EEPROM_Block2_ADDRESS
  /* Select the EEPROM Block2 to write on */
  EEPROM_ADDRESS = EEPROM_Block2_ADDRESS;
#endif
#ifdef EEPROM_Block3_ADDRESS
  /* Select the EEPROM Block3 to write on */
  EEPROM_ADDRESS = EEPROM_Block3_ADDRESS;
#endif
}

/*******************************************************************************
* Function Name  : I2C_EE_BufferWrite
* Description    : Writes buffer of data to the I2C EEPROM.
* Input          : - pBuffer : pointer to the buffer  containing the data to be 
*                    written to the EEPROM.
*                  - WriteAddr : EEPROM's internal address to write to.
*                  - NumByteToWrite : number of bytes to write to the EEPROM.
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite)
{
  u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;

  Addr = WriteAddr % I2C_PageSize;
  count = I2C_PageSize - Addr;
  NumOfPage =  NumByteToWrite / I2C_PageSize;
  NumOfSingle = NumByteToWrite % I2C_PageSize;
 
  /* If WriteAddr is I2C_PageSize aligned  */
  if(Addr == 0) 
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage == 0) 
    {
      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
      I2C_EE_WaitEepromStandbyState();
    }
    /* If NumByteToWrite > I2C_PageSize */
    else  
    {
      while(NumOfPage--)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize); 
    	I2C_EE_WaitEepromStandbyState();
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;
      }

      if(NumOfSingle!=0)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
        I2C_EE_WaitEepromStandbyState();
      }
    }
  }
  /* If WriteAddr is not I2C_PageSize aligned  */
  else 
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage== 0) 
    {
      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
      I2C_EE_WaitEepromStandbyState();
    }
    /* If NumByteToWrite > I2C_PageSize */
    else
    {
      NumByteToWrite -= count;
      NumOfPage =  NumByteToWrite / I2C_PageSize;
      NumOfSingle = NumByteToWrite % I2C_PageSize;	
      
      if(count != 0)
      {  
        I2C_EE_PageWrite(pBuffer, WriteAddr, count);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr += count;
        pBuffer += count;
      } 
      
      while(NumOfPage--)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;  
      }
      if(NumOfSingle != 0)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle); 
        I2C_EE_WaitEepromStandbyState();
      }
    }
  }  
}

/*******************************************************************************
* Function Name  : I2C_EE_ByteWrite
* Description    : Writes one byte to the I2C EEPROM.
* Input          : - pBuffer : pointer to the buffer  containing the data to be 
*                    written to the EEPROM.
*                  - WriteAddr : EEPROM's internal address to write to.
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_ByteWrite(u8* pBuffer, u8 WriteAddr)
{
  /* Send STRAT condition */
  I2C_GenerateSTART(I2C1, ENABLE);

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));  

  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C1, EEPROM_ADDRESS, I2C_Direction_Transmitter);
  
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
      
  /* Send the EEPROM's internal address to write to */
  I2C_SendData(I2C1, WriteAddr);