Usart_Config：神舟IV-STM32107VC

void Usart1_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    
    //使能 PA AFIO总线 串口1
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|
                           RCC_APB2Periph_AFIO|
                           RCC_APB2Periph_USART1,ENABLE);

    //GPIO初始化  PA9 TX ，PA10  RX
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA,&GPIO_InitStructure);

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

    USART_InitStructure.USART_BaudRate = 9600;                   
    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_ClockInitStructure.USART_Clock = USART_Clock_Disable;
    USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
    USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
    USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;*/

    USART_Init(USART1,&USART_InitStructure);
//    USART_ClockInit(USART1,&USART_ClockInitStructure);
    
//    USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);    
    USART_Cmd(USART1,ENABLE);
}

void Usart2_Config(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;
   USART_InitTypeDef USART_InitStructure;

   /* Enable GPIO clock */
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD |   RCC_APB2Periph_AFIO, ENABLE);


   /* Enable the USART2 Pins Software Remapping */
   GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
 

  /* Configure USART Tx as alternate function push-pull PD5*/
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure USART Rx as input floating PD6*/
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  USART_InitStructure.USART_BaudRate = 9600;                   
  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 configuration */
  USART_Init(USART2, &USART_InitStructure);
    
  /* Enable USART */
  USART_Cmd( USART2, ENABLE);

}