I2C_24c02实验

一、RCC初始化

/* Setup the microcontroller system. Initialize the Embedded Flash Interface,
     initialize the PLL and update the SystemFrequency variable. */
  SystemInit();

/* Enable peripheral clocks --------------------------------------------------*/
  /* GPIOB Periph clock enable */
  //RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);

    //启动GPIO模块时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
    //把雕饰设置普通IO口
    GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable,ENABLE);

  /* I2C1 Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

二、I2C_初始化

/* 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);

  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 = 100000;

  /* I2C Peripheral Enable */
  I2C_Cmd(I2C1, ENABLE);
  /* Apply I2C configuration after enabling it */
  I2C_Init(I2C1, &I2C_InitStructure);

三、USART初始化

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);
    USART_Cmd(USART1, ENABLE);

四、main函数测试程序

while (1)
{
    I2C_EE_BufferWrite(ReadBuff, 0, 3);
    I2C_EE_BufferRead(SendBuff, 0, 3);
    Delay(0xfffff);
    fPutString(SendBuff, 15);
}

遇到的问题，我用以前的RCC初始化程序怎么都无法启动I2C。一直在  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));  中跑。
现在还没有搞清楚，I2C需要怎么设置时钟。