STM32F407的UDP发送数据 already, setting, through

yuyang911220

探究WaveShare的F407的板子好几天了，这两天一直止步于网卡模块的udp发包，因为截包工具总是收不到我代码里面发出去的数据包，我的要求是只发特定数据，不管收到的数据包


记录下整个测试过程，以便以后翻阅


使用开发板自带的例程，udp_echo_server的例子，在此基础上修改，main函数是


int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured to
       168 MHz, this is done through SystemInit() function which is called from
       startup file (startup_stm32f4xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f4xx.c file
     */
#ifdef SERIAL_DEBUG
  DebugComPort_Init();
#endif


  
  /*Initialize LCD and Leds */
  LCD_LED_Init();
  
  /* configure ethernet */
  ETH_BSP_Config();
   
  /* Initilaize the LwIP stack */
  LwIP_Init();
  
  /* UDP echoserver */
  udp_echoserver_init();
  
  
  /* Infinite loop */
  while (1)
  {  
   
    /* check if any packet received */
    if (ETH_CheckFrameReceived())
    {
      /* process received ethernet packet */
      LwIP_Pkt_Handle();
    }
    /* handle periodic timers for LwIP */
    LwIP_Periodic_Handle(LocalTime);
  }   
}



我发现串口不能用，可能是其初始化方式有些问题，我做了些修改
将DebugComPort_Init函数改成下面两个函数
  USART_Configuration();

USART_NVIC_Config();

串口1就可以正常使用了
void USART_Configuration(void)
{

  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;


  RCC_AHB1PeriphClockCmd(Open_USART_TX_GPIO_CLK,ENABLE);
  RCC_AHB1PeriphClockCmd(Open_USART_RX_GPIO_CLK,ENABLE);


  #ifdef
USART1_OPEN
  
RCC_APB2PeriphClockCmd(Open_USART_CLK,ENABLE);
  #else
  
RCC_APB1PeriphClockCmd(Open_USART_CLK,ENABLE);
  #endif





  GPIO_PinAFConfig(Open_USART_TX_GPIO_PORT, Open_USART_TX_SOURCE, Open_USART_TX_AF);
  GPIO_PinAFConfig(Open_USART_RX_GPIO_PORT, Open_USART_RX_SOURCE, Open_USART_RX_AF);


  /*
  *  Open_USART_TX -> PA9 , Open_USART_RX -PA10
  */
  GPIO_InitStructure.GPIO_Pin = Open_USART_TX_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;


  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(Open_USART_TX_GPIO_PORT, &GPIO_InitStructure);


  GPIO_InitStructure.GPIO_Pin = Open_USART_RX_PIN;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(Open_USART_RX_GPIO_PORT, &GPIO_InitStructure);


/*
   
USARTx configured as follow:
         - BaudRate = 115200 baud  

- Word Length = 8 Bits
         - One Stop Bit
         - No parity
         - Hardware flow control disabled (RTS and CTS signals)
         - Receive and transmit   
*/