stm32 107以太网库的demo使用uip的问题，

只看该作者 · 2010-10-11 17:02

官方的以太网uip的demo是一个webserver,我将webserver等内容去掉，准备弄过网络与串口互转的设备，先贴一下代码，再说明问题：
uipMain.c中的uipMain函数

void uIPMain(void)
{
  u8_t i, arptimer;
  uip_eth_hdr *BUF = (uip_eth_hdr*)uip_buf;//uip_buf是一个1502大小的数组，用于全局来处理以太网帧

  u32 size;
  /* Initialize the uIP TCP/IP stack. */
  uip_init();
  arptimer = 0;
  tcp_server_init();//此处将httpd_init改成了我的一个初始化函数

  while(1)
  {
   /* Let the tapdev network device driver read an entire IP packet
   into the uip_buf. If it must wait for more than 0.5 seconds, it
   will return with the return value 0. If so, we know that it is
   time to call upon the uip_periodic(). Otherwise, the tapdev has
   received an IP packet that is to be processed by uIP. */

   size = ETH_HandleRxPkt(uip_buf);//处理接收的包

   if (size > 0)
      uip_len = size;

   if(uip_len <= 0x0)//表明读取数据超时
   {
      for(i = 0; i < UIP_CONNS; i++)//tcp部分
      {
            uip_periodic(i);

            /* If the above function invocation resulted in data that
            should be sent out on the network, the global variable
            uip_len is set to a value > 0. */

            if(uip_len > 0)
            {
               uip_arp_out();
               TransmitPacket();
            }
      }/* end for */

#if UIP_UDP
      for(i = 0; i < UIP_UDP_CONNS; i++)//udp部分
      {
            uip_udp_periodic(i);
            /* If the above function invocation resulted in data that
            should be sent out on the network, the global variable
            uip_len is set to a value > 0. */
            if(uip_len > 0)
            {
               uip_arp_out();
               TransmitPacket();
            }
      } /* end for */
#endif /* UIP_UDP */

      /* Call the ARP timer function every 10 seconds. */
      if(++arptimer == 20)
      {
            uip_arp_timer();
            arptimer = 0;
      }
   } /* end if(uip_len <= 0x0) */

   else
   {
      if(BUF->type == htons(UIP_ETHTYPE_IP))//如果是IP包
      {
            uip_arp_ipin();
            uip_input();

            /* If the above function invocation resulted in data that
            should be sent out on the network, the global variable
            uip_len is set to a value > 0. */
            if(uip_len > 0)
            {
               uip_arp_out();
               TransmitPacket();
            }
      }
      else if(BUF->type == htons(UIP_ETHTYPE_ARP))//如果是ARP包
      {
            uip_arp_arpin();

            /* If the above function invocation resulted in data that
            should be sent out on the network, the global variable
            uip_len is set to a value > 0. */
            if(uip_len > 0)
            {
               TransmitPacket();
            }
      }
   } /* end else */
  }
}

tcp_server.c

复制

#include "uip.h"

#include "tcp_server.h"

#include <stdio.h>



#define HOST_IDLE 0 //主机空闲，一直处于监听状态

#define CLIENT_GET 1 //客户端连接上

#define DATA_SEND 2



struct tcp_server_state *tss;//tcp sever state 



void tcp_server_init(void)

{

uip_listen(HTONS(1000));

}





/* 注意uip如果做为tcp服务器端向客户端发送数据只有三种方法

1.在收到新数据时进行发送

2.在需要重发时进行发送 

3.在收到对方收到数据的ack确认后，如果有数据可以进行发送 */

void tcp_server_appcall(void)

{

tss = (struct tcp_server_state *)(uip_conn->appstate);



if(uip_connected()) //客户端接入

{

printf("Tcp Clinet In \r\n");

tss->state = CLIENT_GET;

return; 

}



if(uip_newdata()|| uip_rexmit()) //收到新的数据

{

switch(tss->state)

{

case CLIENT_GET:

printf("Get The Clinet Data Num is %d\r\n",uip_datalen());

if(!uip_poll())

{

uip_send("ok\n", 3);

tss->state = DATA_SEND;

}

break;



default:break;

}

}



if(uip_acked() && tss->state == DATA_SEND)

{

tss->state = CLIENT_GET;

printf("send has been ack\r\n");

}



if(uip_poll())

{

//复制数据到缓冲区

return ;

}



if(uip_timedout())

{

printf("uip time out \r\n");

}



if(uip_aborted()) //是否客户端中断关闭

{ 

printf("The Client Is Aborted\r\n");

tss->state = HOST_IDLE;

} 



if(uip_closed()) //是否客户端中断关闭

{ 

printf("The Client Is Closed\r\n");

tss->state = HOST_IDLE;

} 

}

tcp_server.h

复制

#ifndef _SERVER_H

#define _SERVER_H



#include "uipopt.h"



void tcp_server_init(void);

void tcp_server_appcall(void);



#ifndef UIP_APPCALL 

#define UIP_APPCALL tcp_server_appcall

#endif



struct tcp_server_state {

u8_t state; 

};



/* UIP_APPSTATE_SIZE: The size of the application-specific state

stored in the uip_conn structure. */

#ifndef UIP_APPSTATE_SIZE

#define UIP_APPSTATE_SIZE (sizeof(struct tcp_server_state))

#endif



#endif