主函数中各函数的排序问题

只看该作者 · 2016-11-23 21:05

int main(void)
{ unsigned int i,j;
  /*!< 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
   */
  USART_Config();
  DMA_Config();
  NVIC_Config();
  GPIO_SetBits(GPIOF, GPIO_Pin_10); //关闭LED
  //add a long delay wait for DP83848 finish reset

            for(i=0;i<50;i++){
                     for(j=0;j < 65500;j++);
            }
#ifdef SERIAL_DEBUG
  DebugComPort_Init();
#endif


      ETH_BSP_Config();                               /* Initilaize the LwIP stack */
      LwIP_Init();                                     /* tcp echo server Init */
      tcp_echoserver_init();                      /* Infinite loop */

while (1)
  {
  if(ETH_CheckFrameReceived()){/* check if any packet received */
                           LwIP_Pkt_Handle();/* process received ethernet packet */
}
LwIP_Periodic_Handle(LocalTime); /* handle periodic timers for LwIP */
}
以上是我的主函数，在主函数中主要有串口初始化函数和lwip初始化函数，现在是串口函数能用，网络部分没反应；当这两部分函数的位置互换，结果就是网络好用，串口没反应。有明白的帮着解释解释啊。。。。。。