mini2440 can not ping

I connect a cross cable from my computer to mini2440. It displayed

[root@FriendlyARM /]# eth0: link down
eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1

I tried to ping to 8.8.8.8 or 192.168.1.230 from my computer. The result is
all loss.

here is the mini2440 ifconfig

eth0      Link encap:Ethernet  HWaddr 08:90:90:90:90:90
          inet addr:192.168.1.230  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:252 errors:0 dropped:0 overruns:0 frame:0
          TX packets:123 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:86442 (84.4 KiB)  TX bytes:5166 (5.0 KiB)
          Interrupt:51 Base address:0x4300

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:114 errors:0 dropped:0 overruns:0 frame:0
          TX packets:114 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:11996 (11.7 KiB)  TX bytes:11996 (11.7 KiB)

OK On my computer I can ping 8.8.8.8

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_req=1 ttl=46 time=34.4 ms
64 bytes from 8.8.8.8: icmp_req=2 ttl=45 time=34.3 ms
64 bytes from 8.8.8.8: icmp_req=3 ttl=45 time=36.3 ms
64 bytes from 8.8.8.8: icmp_req=4 ttl=46 time=89.4 ms
64 bytes from 8.8.8.8: icmp_req=5 ttl=45 time=37.7 ms
64 bytes from 8.8.8.8: icmp_req=6 ttl=46 time=35.0 ms

64 bytes from 8.8.8.8: icmp_req=7 ttl=45 time=79.3 ms
64 bytes from 8.8.8.8: icmp_req=8 ttl=45 time=35.4 ms
^C
--- 8.8.8.8 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7010ms
rtt min/avg/max/mdev = 34.306/47.756/89.404/21.319 ms

but not 192.168.230
PING 192.168.1.230 (192.168.1.230) 56(84) bytes of data.
From 192.168.1.4 icmp_seq=1 Destination Host Unreachable
From 192.168.1.4 icmp_seq=2 Destination Host Unreachable
From 192.168.1.4 icmp_seq=3 Destination Host Unreachable
^C
--- 192.168.1.230 ping statistics ---
5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3999ms
pipe 4

PLEASE HELP!

What is the IP address of your computer?

eth0      Link encap:Ethernet  HWaddr 60:eb:69:69:ba:0b  
          inet6 addr: fe80::62eb:69ff:fe69:ba0b/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:28 errors:0 dropped:0 overruns:0 frame:0
          TX packets:622 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2904 (2.9 KB)  TX bytes:137278 (137.2 KB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2172 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2172 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:179578 (179.5 KB)  TX bytes:179578 (179.5 KB)

wlan0     Link encap:Ethernet  HWaddr 00:26:c7:67:27:a8  
          inet addr:192.168.1.7  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::226:c7ff:fe67:27a8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:14326 errors:0 dropped:1 overruns:0 frame:0
          TX packets:11813 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:12734410 (12.7 MB)  TX bytes:1427842 (1.4 MB)

Your computer doesn't look like it has an IP address on eth0.  Disable the
wireless and see if eth0 now appears.

I usually assign my host to static address, ie 192.168.1.x so they are both
on the same subnet.

I think you need a namesever on one of them if you want to automatically
assign an IP address.  Read about DHCP

Thank you very much! It worked now after changing to static IP