现在网络部分可以连接上，但是老是访问不了主页，只是偶尔可以访问？

用的TQ2440的核心板，自己设计的包含网络部分和串口部分的底板，原理图和天嵌的TQ2440开发板一模一样，之前出现问题检测不到网络，网络接口的灯也不亮，现在可以检测到网络，网络接口的灯也亮，web文件夹里的index.html主页只是偶尔可以打开访问到，绝大多数时候都是打不开该网页，这是怎么回事？

ping一下掉包率有多大？

TQ-ZQL 发表于 2013-11-11 09:43
ping一下掉包率有多大？

ping了之后报错如下：
ping 192.168.1.8
PING 192.168.1.8 (192.168.1.8): 56 data bytes
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:226 dev_watchdog+0x260/0x280()
NETDEV WATCHDOG: eth0 (dm9000): transmit timed out
Modules linked in: rt5370sta rt73usb rt2x00usb rt2x00lib zd1211rw mac80211 FM_gpio
Backtrace:
[<c0048fd4>] (dump_backtrace+0x0/0x10c) from [<c036f630>] (dump_stack+0x18/0x1c)
r7:c04ade08 r6:c03041f4 r5:c048ae90 r4:000000e2
[<c036f618>] (dump_stack+0x0/0x1c) from [<c0056f50>] (warn_slowpath_common+0x4c/0x80)
[<c0056f04>] (warn_slowpath_common+0x0/0x80) from [<c0056fd0>] (warn_slowpath_fmt+0x30/0x38)
r7:00000000 r6:c38be400 r5:c05182b8 r4:c04ade2c
[<c0056fa0>] (warn_slowpath_fmt+0x0/0x38) from [<c03041f4>] (dev_watchdog+0x260/0x280)
r3:c38be400 r2:c048aea8
r4:c04b41a0
[<c0303f94>] (dev_watchdog+0x0/0x280) from [<c0060e40>] (run_timer_softirq+0x1ac/0x22c)
r7:c0303f94 r6:c04adea8 r5:00000100 r4:c0509800
[<c0060c94>] (run_timer_softirq+0x0/0x22c) from [<c005c120>] (__do_softirq+0x78/0x100)
[<c005c0a8>] (__do_softirq+0x0/0x100) from [<c005c1f0>] (irq_exit+0x48/0x50)
[<c005c1a8>] (irq_exit+0x0/0x50) from [<c0044048>] (_text+0x48/0x70)
[<c0044000>] (_text+0x0/0x70) from [<c0044a44>] (__irq_svc+0x24/0xa0)
Exception stack(0xc04adf48 to 0xc04adf90)
df40:                   f4100000 00000032 f4100000 60000013 c0045ed8 c04ac000
df60: c0045ed8 c04e8744 3001f514 41129200 3001f4e0 c04adf9c c04adfa0 c04adf90
df80: c004650c c0045f38 60000013 ffffffff                                    
r7:c04e8744 r6:00004000 r5:f4000000 r4:ffffffff
[<c0045ed8>] (default_idle+0x0/0xac) from [<c004650c>] (cpu_idle+0x4c/0x68)
[<c00464c0>] (cpu_idle+0x0/0x68) from [<c036cefc>] (rest_init+0x5c/0x70)
r7:c04b04f0 r6:c0020d34 r5:c04e8700 r4:c050bfcc
[<c036cea0>] (rest_init+0x0/0x70) from [<c0008944>] (start_kernel+0x1e0/0x24c)
[<c0008764>] (start_kernel+0x0/0x24c) from [<30008034>] (0x30008034)
r5:c04e87e8 r4:c0007175
---[ end trace d186a806329ee5ae ]---

网络通信超时
可能是dm9000与网络接口通信那一块有问题，可以看下加焊一下或者检查下硬件。