STM32F407的UDP发送数据（2）

yuyang911220

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(Open_USART, &USART_InitStructure);
  /* Enable the Open_USART Transmit interrupt: this interrupt is generated when the
     Open_USART transmit data register is empty */
  USART_ITConfig(Open_USART,USART_IT_RXNE,ENABLE);


  USART_Cmd(Open_USART, ENABLE);


}


void USART_NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;


  /* Enable the USARTx Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = Open_USART_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}


然后将udp_echoserver_init();注释掉
在while(1)里面添加一下函数
udp_send_data(udp_data, sizeof(udp_data));
代码是
unsigned char udp_data[]= "hello world!";

void udp_send_data(uint8_t* pData, uint16_t len)
{
   struct udp_pcb *upcb;
   struct pbuf* buff;
   struct ip_addr ipaddr;
   err_t err;
  
   buff = pbuf_alloc(PBUF_TRANSPORT, 1024, PBUF_ROM);
  buff->payload = pData;
  buff->len = len;
  buff->tot_len = len;

   upcb = udp_new();//建立一个新的UDP包
   udp_bind(upcb, IP_ADDR_ANY, 7);
   IP4_ADDR(&ipaddr, 192, 168, 1, 11); //切记，此处的IP是PC的IP，因为使用PC的截包软件接收
   
  
     err = udp_connect(upcb, &ipaddr, 7);

    if(err == ERR_OK)
    {
       err = udp_send(upcb, buff);
      if(ERR_IS_FATAL(err))
        printf("udp_send...%d\r\n",err);
    }
   
   udp_disconnect(upcb);
   pbuf_free(buff);
   udp_remove(upcb);
}




最终main函数是
int main(void)
{

  USART_Configuration();
  USART_NVIC_Config();


  
  /*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)
  {  
     udp_send_data(udp_data, sizeof(udp_data));
     //Delay(100);   
    /* check if any packet received */
    if (ETH_CheckFrameReceived())
    {
      /* process received ethernet packet */
      LwIP_Pkt_Handle();
    }
    /* handle periodic timers for LwIP */
    LwIP_Periodic_Handle(LocalTime);
  }   
}