使用httpd发生错误web_server

发布于 2012-04-11 21:27:48 浏览：6657 订阅该版

想利用lwip里面自带的httpd做个web server，我加的代码：
```void rt_init_thread_web_server_entry(void* parameter)
{
	httpd_init();	
	while(1) {
		rt_thread_delay(200);	//sleep 2 sec
	}
}```
作为一个独立的任务。我用的芯片是stm32103fvet6
在PC端的浏览器地址栏输入192.168.0.101后，系统打印出来：
```psr: 0x01000000
 pc: 0x0800f076
 lr: 0x0801b765
r12: 0x00000000
r03: 0xffffffff
r02: 0x0800f051
r01: 0x20008a70
r00: 0x000000a1
hard fault on thread: tcpip
 thread  pri  status      sp     stack size max used   left tick  error
-------- ---- ------- ---------- ---------- ---------- ---------- ---
tcpip    0x0c ready   0x000000c8 0x00000400 0x00000220 0x00000014 000
etx      0x0f suspend 0x00000090 0x00000200 0x00000090 0x0000000e 000
erx      0x0f suspend 0x00000090 0x00000200 0x000000d0 0x00000010 000
tidle    0x1f ready   0x00000050 0x00000100 0x00000050 0x0000001c 000
tshell   0x14 suspend 0x00000088 0x00000800 0x00000088 0x0000000a 000
init_4   0x08 suspend 0x00000080 0x00000800 0x00000080 0x00000014 000
init_3   0x08 suspend 0x000000d8 0x00000800 0x000001a0 0x0000000c 000
init_2   0x08 suspend 0x00000088 0x00000800 0x000000a0 0x00000013 000
init_1   0x07 suspend 0x000000f0 0x00000800 0x000000f0 0x00000013 000```

请帮忙分析下是什么原因。谢谢。

3 个回答

prife 2012-04-12

这家伙很懒，什么也没写！

isupercar 2012-04-15

这家伙很懒，什么也没写！

>MDK选择使用软件模拟器仿真运行。
>然后调出反汇编窗口，在其中右击，选择 show xx address. 然后就会弹出一个对话框，你把线程崩溃时的LR的值，即0x0801b765，填入，就可以看到在哪里崩溃的了。
>然后仔细检查吧。

---

我看了下：

```
   646:   snmp_insert_udpidx_tree(pcb); 
   647:   /* pcb not active yet? */ 
   648:   if (rebind == 0) { 
   649:     /* place the PCB on the active list if not already there */ 
   650:     pcb->next = udp_pcbs; 
   651:     udp_pcbs = pcb; 
   652:   } 
   653:   LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, 
   654:               ("udp_bind: bound to %"U16_F".%"U16_F".%"U16_F".%"U16_F", port %"U16_F"
", 
   655:                (u16_t)((ntohl(pcb->local_ip.addr) >> 24) & 0xff), 
   656:                (u16_t)((ntohl(pcb->local_ip.addr) >> 16) & 0xff), 
   657:                (u16_t)((ntohl(pcb->local_ip.addr) >> 8) & 0xff), 
   658:                (u16_t)(ntohl(pcb->local_ip.addr) & 0xff), pcb->local_port)); 
   659:   return ERR_OK; 
0x0801B764 F06F000A  MVN      r0,#0x0A
   660: } 
   661: /** 
   662:  * Connect an UDP PCB. 
   663:  * 
   664:  * This will associate the UDP PCB with the remote address. 
   665:  * 
   666:  * @param pcb UDP PCB to be connected with remote address ipaddr and port. 
   667:  * @param ipaddr remote IP address to connect with. 
   668:  * @param port remote UDP port to connect with. 
   669:  * 
   670:  * @return lwIP error code 
   671:  * 
   672:  * ipaddr & port are expected to be in the same byte order as in the pcb. 
   673:  * 
   674:  * The udp pcb is bound to a random local port if not already bound. 
   675:  * 
   676:  * @see udp_disconnect() 
   677:  */ 
   678: err_t 
   679: udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port) 
0x0801B768 E8BD81F0  POP      {r4-r8,pc}
   645:   pcb->local_port = port; 
   646:   snmp_insert_udpidx_tree(pcb); 
   647:   /* pcb not active yet? */ 
0x0801B76C 8266      STRH     r6,[r4,#0x12]
```