diff --git a/bsp/lm3s/SConstruct b/bsp/lm3s/SConstruct
index edccc757d..5cf0be646 100644
--- a/bsp/lm3s/SConstruct
+++ b/bsp/lm3s/SConstruct
@@ -37,8 +37,9 @@ if rtconfig.RT_USING_LWIP:
 
 src_bsp = ['application.c', 'startup.c', 'board.c']
 
+src_drv = []
 if rtconfig.RT_USING_DFS:
-	src_drv = ['sdcard.c']
+	src_drv += ['sdcard.c']
 
 if rtconfig.RT_USING_LWIP:
 	src_drv += ['luminaryif.c']
diff --git a/bsp/lm3s/board.c b/bsp/lm3s/board.c
index 2f267f395..0a64a2f12 100644
--- a/bsp/lm3s/board.c
+++ b/bsp/lm3s/board.c
@@ -50,12 +50,27 @@ void rt_hw_timer_handler(void)
 }
 
 /**
- * This function will initial STM32 board.
+ * This is the ethernet interrupt service routine.
+ * 
+ */
+void rt_hw_eth_handler(void)
+{
+#ifdef RT_USING_LWIP
+		/* luminary ethernet interface */
+		extern void luminaryif_isr(void);
+		luminaryif_isr();
+#endif	
+}
+
+/**
+ * This function will initial LM3S board.
  */
 void rt_hw_board_init()
 {
+	/* set ldo */
+	SysCtlLDOSet(SYSCTL_LDO_2_50V);
 	/* set clock */
-	SysCtlClockSet(SYSCTL_SYSDIV_2 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
+	SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                    SYSCTL_XTAL_6MHZ);
 
 	/* init systick */
diff --git a/bsp/lm3s/board.h b/bsp/lm3s/board.h
index 9a2f330aa..f386ea3cf 100644
--- a/bsp/lm3s/board.h
+++ b/bsp/lm3s/board.h
@@ -10,8 +10,10 @@
  * Change Logs:
  * Date           Author       Notes
  * 2006-10-08     Bernard      add board.h to this bsp
+ * 2009-12-25     yi.qiu          add LM3S configration
  */
 
+// <<< Use Configuration Wizard in Context Menu >>>
 #ifndef __BOARD_H__
 #define __BOARD_H__
 
diff --git a/bsp/lm3s/project_lwip_dfs.Opt b/bsp/lm3s/project_lwip_dfs.Opt
index e87959468..3d25594d9 100644
--- a/bsp/lm3s/project_lwip_dfs.Opt
+++ b/bsp/lm3s/project_lwip_dfs.Opt
@@ -15,112 +15,121 @@ GRPOPT 1,(Startup),1,0,0
 GRPOPT 2,(Kernel),0,0,0
 GRPOPT 3,(finsh),0,0,0
 GRPOPT 4,(LM3S),0,0,0
-GRPOPT 5,(driverlib),1,0,0
-GRPOPT 6,(Filesystem),1,0,0
-GRPOPT 7,(LwIP),0,0,0
+GRPOPT 5,(driverlib),0,0,0
+GRPOPT 6,(Filesystem),0,0,0
+GRPOPT 7,(LwIP),1,0,0
 GRPOPT 8,(Utils),1,0,0
 
-OPTFFF 1,1,1,201326592,0,0,0,0,<.\application.c><application.c> 
-OPTFFF 1,2,1,2,0,10,18,0,<.\board.c><board.c> { 44,0,0,0,2,0,0,0,3,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,22,0,0,0,29,0,0,0,161,2,0,0,71,1,0,0 }
-OPTFFF 1,3,1,0,0,0,0,0,<.\startup.c><startup.c> 
-OPTFFF 1,4,5,0,0,0,0,0,<.\rtconfig.h><rtconfig.h> 
+OPTFFF 1,1,1,0,0,1,1,0,<.\application.c><application.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,236,2,0,0,123,1,0,0 }
+OPTFFF 1,2,1,486539264,0,63,63,0,<.\board.c><board.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,183,2,0,0,100,1,0,0 }
+OPTFFF 1,3,1,0,0,130,135,0,<.\startup.c><startup.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,22,0,0,0,29,0,0,0,161,2,0,0,71,1,0,0 }
+OPTFFF 1,4,5,469762048,0,115,128,0,<.\rtconfig.h><rtconfig.h> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,139,2,0,0,42,1,0,0 }
 OPTFFF 1,5,1,922746880,0,0,0,0,<.\sdcard.c><sdcard.c> 
-OPTFFF 1,6,1,0,0,0,0,0,<.\luminaryif.c><luminaryif.c> 
-OPTFFF 2,7,1,0,0,0,0,0,<..\..\src\clock.c><clock.c> 
-OPTFFF 2,8,1,0,0,0,0,0,<..\..\src\device.c><device.c> 
-OPTFFF 2,9,1,0,0,0,0,0,<..\..\src\idle.c><idle.c> 
-OPTFFF 2,10,1,0,0,0,0,0,<..\..\src\ipc.c><ipc.c> 
-OPTFFF 2,11,1,0,0,0,0,0,<..\..\src\irq.c><irq.c> 
-OPTFFF 2,12,1,0,0,0,0,0,<..\..\src\mem.c><mem.c> 
-OPTFFF 2,13,1,0,0,0,0,0,<..\..\src\mempool.c><mempool.c> 
-OPTFFF 2,14,1,0,0,0,0,0,<..\..\src\object.c><object.c> 
-OPTFFF 2,15,1,0,0,0,0,0,<..\..\src\scheduler.c><scheduler.c> 
-OPTFFF 2,16,1,0,0,0,0,0,<..\..\src\slab.c><slab.c> 
-OPTFFF 2,17,1,0,0,0,0,0,<..\..\src\thread.c><thread.c> 
-OPTFFF 2,18,1,0,0,0,0,0,<..\..\src\timer.c><timer.c> 
-OPTFFF 2,19,1,0,0,0,0,0,<..\..\src\kservice.c><kservice.c> 
-OPTFFF 3,20,1,0,0,0,0,0,<..\..\finsh\symbol.c><symbol.c> 
-OPTFFF 3,21,1,0,0,0,0,0,<..\..\finsh\cmd.c><cmd.c> 
-OPTFFF 3,22,1,0,0,0,0,0,<..\..\finsh\finsh_compiler.c><finsh_compiler.c> 
-OPTFFF 3,23,1,0,0,0,0,0,<..\..\finsh\finsh_error.c><finsh_error.c> 
-OPTFFF 3,24,1,0,0,0,0,0,<..\..\finsh\finsh_heap.c><finsh_heap.c> 
-OPTFFF 3,25,1,0,0,0,0,0,<..\..\finsh\finsh_init.c><finsh_init.c> 
-OPTFFF 3,26,1,0,0,0,0,0,<..\..\finsh\finsh_node.c><finsh_node.c> 
-OPTFFF 3,27,1,0,0,0,0,0,<..\..\finsh\finsh_ops.c><finsh_ops.c> 
-OPTFFF 3,28,1,0,0,0,0,0,<..\..\finsh\finsh_parser.c><finsh_parser.c> 
-OPTFFF 3,29,1,0,0,0,0,0,<..\..\finsh\finsh_token.c><finsh_token.c> 
-OPTFFF 3,30,1,0,0,0,0,0,<..\..\finsh\finsh_var.c><finsh_var.c> 
-OPTFFF 3,31,1,0,0,0,0,0,<..\..\finsh\finsh_vm.c><finsh_vm.c> 
-OPTFFF 3,32,1,0,0,0,0,0,<..\..\finsh\shell.c><shell.c> 
-OPTFFF 4,33,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\cpu.c><cpu.c> 
-OPTFFF 4,34,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\interrupt.c><interrupt.c> 
-OPTFFF 4,35,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\stack.c><stack.c> 
-OPTFFF 4,36,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\context_rvds.S><context_rvds.S> 
-OPTFFF 4,37,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\start_rvds.S><start_rvds.S> 
-OPTFFF 4,38,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\serial.c><serial.c> 
-OPTFFF 4,39,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\fault.c><fault.c> 
-OPTFFF 4,40,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\fault_rvds.S><fault_rvds.S> 
-OPTFFF 5,41,4,0,0,0,0,0,<E:\SVN-Google-Source\bsp\lm3s\Libraries\driverlib\rvmdk\driverlib.lib><driverlib.lib> 
-OPTFFF 6,42,1,1,0,0,0,0,<..\..\filesystem\dfs\src\dfs_init.c><dfs_init.c> 
-OPTFFF 6,43,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_fs.c><dfs_fs.c> 
-OPTFFF 6,44,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_raw.c><dfs_raw.c> 
-OPTFFF 6,45,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_util.c><dfs_util.c> 
-OPTFFF 6,46,1,0,0,1,1,0,<..\..\filesystem\dfs\src\dfs_cache.c><dfs_cache.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,135,2,0,0,41,1,0,0 }
-OPTFFF 6,47,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_posix.c><dfs_posix.c> 
-OPTFFF 6,48,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\efs.c><efs.c> 
-OPTFFF 6,49,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\extract.c><extract.c> 
-OPTFFF 6,50,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\partition.c><partition.c> 
-OPTFFF 6,51,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\plibc.c><plibc.c> 
-OPTFFF 6,52,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\dir.c><dir.c> 
-OPTFFF 6,53,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fat.c><fat.c> 
-OPTFFF 6,54,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\file.c><file.c> 
-OPTFFF 6,55,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fs.c><fs.c> 
-OPTFFF 6,56,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ls.c><ls.c> 
-OPTFFF 6,57,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\time.c><time.c> 
-OPTFFF 6,58,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ui.c><ui.c> 
-OPTFFF 7,59,1,1,0,0,0,0,<..\..\net\lwip\src\core\dhcp.c><dhcp.c> 
-OPTFFF 7,60,1,0,0,0,0,0,<..\..\net\lwip\src\core\dns.c><dns.c> 
-OPTFFF 7,61,1,0,0,0,0,0,<..\..\net\lwip\src\core\init.c><init.c> 
-OPTFFF 7,62,1,0,0,0,0,0,<..\..\net\lwip\src\core\netif.c><netif.c> 
-OPTFFF 7,63,1,0,0,0,0,0,<..\..\net\lwip\src\core\pbuf.c><pbuf.c> 
-OPTFFF 7,64,1,0,0,0,0,0,<..\..\net\lwip\src\core\raw.c><raw.c> 
-OPTFFF 7,65,1,0,0,0,0,0,<..\..\net\lwip\src\core\stats.c><stats.c> 
-OPTFFF 7,66,1,0,0,0,0,0,<..\..\net\lwip\src\core\sys.c><sys.c> 
-OPTFFF 7,67,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp.c><tcp.c> 
-OPTFFF 7,68,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_in.c><tcp_in.c> 
-OPTFFF 7,69,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_out.c><tcp_out.c> 
-OPTFFF 7,70,1,0,0,0,0,0,<..\..\net\lwip\src\core\udp.c><udp.c> 
-OPTFFF 7,71,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\autoip.c><autoip.c> 
-OPTFFF 7,72,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\icmp.c><icmp.c> 
-OPTFFF 7,73,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\igmp.c><igmp.c> 
-OPTFFF 7,74,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet.c><inet.c> 
-OPTFFF 7,75,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet_chksum.c><inet_chksum.c> 
-OPTFFF 7,76,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip.c><ip.c> 
-OPTFFF 7,77,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_addr.c><ip_addr.c> 
-OPTFFF 7,78,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_frag.c><ip_frag.c> 
-OPTFFF 7,79,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_in.c><msg_in.c> 
-OPTFFF 7,80,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_out.c><msg_out.c> 
-OPTFFF 7,81,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_lib.c><api_lib.c> 
-OPTFFF 7,82,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_msg.c><api_msg.c> 
-OPTFFF 7,83,1,0,0,0,0,0,<..\..\net\lwip\src\api\err.c><err.c> 
-OPTFFF 7,84,1,0,0,0,0,0,<..\..\net\lwip\src\api\netbuf.c><netbuf.c> 
-OPTFFF 7,85,1,0,0,0,0,0,<..\..\net\lwip\src\api\netdb.c><netdb.c> 
-OPTFFF 7,86,1,0,0,0,0,0,<..\..\net\lwip\src\api\netifapi.c><netifapi.c> 
-OPTFFF 7,87,1,0,0,0,0,0,<..\..\net\lwip\src\api\tcpip.c><tcpip.c> 
-OPTFFF 7,88,1,0,0,0,0,0,<..\..\net\lwip\src\netif\etharp.c><etharp.c> 
-OPTFFF 7,89,1,0,0,0,0,0,<..\..\net\lwip\src\netif\ethernetif.c><ethernetif.c> 
-OPTFFF 7,90,1,0,0,0,0,0,<..\..\net\lwip\src\netif\loopif.c><loopif.c> 
-OPTFFF 7,91,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch_init.c><sys_arch_init.c> 
-OPTFFF 7,92,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch.c><sys_arch.c> 
-OPTFFF 7,93,1,0,0,0,0,0,<..\..\net\lwip\src\api\sockets.c><sockets.c> 
-OPTFFF 7,94,1,0,0,0,0,0,<..\..\net\lwip\src\core\memp_tiny.c><memp_tiny.c> 
-OPTFFF 8,95,1,0,0,0,0,0,<..\..\net\apps\chargen.c><chargen.c> 
-OPTFFF 8,96,1,0,0,0,0,0,<..\..\net\apps\ftpd.c><ftpd.c> 
-OPTFFF 8,97,1,0,0,0,0,0,<..\..\net\apps\sntp.c><sntp.c> 
-OPTFFF 8,98,1,0,0,0,0,0,<..\..\net\apps\tcpecho.c><tcpecho.c> 
-OPTFFF 8,99,1,486539264,0,0,0,0,<..\..\net\apps\tftp.c><tftp.c> 
-OPTFFF 8,100,1,0,0,0,0,0,<..\..\net\apps\udpecho.c><udpecho.c> 
+OPTFFF 1,6,1,1006632960,0,1,1,0,<.\luminaryif.c><luminaryif.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,66,0,0,0,87,0,0,0,205,2,0,0,129,1,0,0 }
+OPTFFF 1,7,5,0,0,0,0,0,<.\board.h><board.h> 
+OPTFFF 2,8,1,0,0,0,0,0,<..\..\src\clock.c><clock.c> 
+OPTFFF 2,9,1,0,0,0,0,0,<..\..\src\device.c><device.c> 
+OPTFFF 2,10,1,0,0,51,60,0,<..\..\src\idle.c><idle.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,66,0,0,0,87,0,0,0,205,2,0,0,129,1,0,0 }
+OPTFFF 2,11,1,0,0,0,0,0,<..\..\src\ipc.c><ipc.c> 
+OPTFFF 2,12,1,0,0,0,0,0,<..\..\src\irq.c><irq.c> 
+OPTFFF 2,13,1,0,0,0,0,0,<..\..\src\mem.c><mem.c> 
+OPTFFF 2,14,1,0,0,0,0,0,<..\..\src\mempool.c><mempool.c> 
+OPTFFF 2,15,1,0,0,0,0,0,<..\..\src\object.c><object.c> 
+OPTFFF 2,16,1,0,0,0,0,0,<..\..\src\scheduler.c><scheduler.c> 
+OPTFFF 2,17,1,0,0,0,0,0,<..\..\src\slab.c><slab.c> 
+OPTFFF 2,18,1,0,0,0,0,0,<..\..\src\thread.c><thread.c> 
+OPTFFF 2,19,1,0,0,0,0,0,<..\..\src\timer.c><timer.c> 
+OPTFFF 2,20,1,0,0,0,0,0,<..\..\src\kservice.c><kservice.c> 
+OPTFFF 3,21,1,0,0,0,0,0,<..\..\finsh\symbol.c><symbol.c> 
+OPTFFF 3,22,1,0,0,0,0,0,<..\..\finsh\cmd.c><cmd.c> 
+OPTFFF 3,23,1,0,0,0,0,0,<..\..\finsh\finsh_compiler.c><finsh_compiler.c> 
+OPTFFF 3,24,1,0,0,0,0,0,<..\..\finsh\finsh_error.c><finsh_error.c> 
+OPTFFF 3,25,1,0,0,0,0,0,<..\..\finsh\finsh_heap.c><finsh_heap.c> 
+OPTFFF 3,26,1,0,0,0,0,0,<..\..\finsh\finsh_init.c><finsh_init.c> 
+OPTFFF 3,27,1,0,0,0,0,0,<..\..\finsh\finsh_node.c><finsh_node.c> 
+OPTFFF 3,28,1,0,0,0,0,0,<..\..\finsh\finsh_ops.c><finsh_ops.c> 
+OPTFFF 3,29,1,0,0,0,0,0,<..\..\finsh\finsh_parser.c><finsh_parser.c> 
+OPTFFF 3,30,1,0,0,0,0,0,<..\..\finsh\finsh_token.c><finsh_token.c> 
+OPTFFF 3,31,1,0,0,0,0,0,<..\..\finsh\finsh_var.c><finsh_var.c> 
+OPTFFF 3,32,1,0,0,0,0,0,<..\..\finsh\finsh_vm.c><finsh_vm.c> 
+OPTFFF 3,33,1,0,0,0,0,0,<..\..\finsh\shell.c><shell.c> 
+OPTFFF 4,34,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\cpu.c><cpu.c> 
+OPTFFF 4,35,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\interrupt.c><interrupt.c> 
+OPTFFF 4,36,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\stack.c><stack.c> 
+OPTFFF 4,37,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\context_rvds.S><context_rvds.S> 
+OPTFFF 4,38,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\start_rvds.S><start_rvds.S> 
+OPTFFF 4,39,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\serial.c><serial.c> 
+OPTFFF 4,40,1,0,0,0,0,0,<..\..\libcpu\arm\lm3s\fault.c><fault.c> 
+OPTFFF 4,41,2,0,0,0,0,0,<..\..\libcpu\arm\lm3s\fault_rvds.S><fault_rvds.S> 
+OPTFFF 5,42,4,0,0,0,0,0,<E:\SVN-Google-Source\bsp\lm3s\Libraries\driverlib\rvmdk\driverlib.lib><driverlib.lib> 
+OPTFFF 6,43,1,1,0,0,0,0,<..\..\filesystem\dfs\src\dfs_init.c><dfs_init.c> 
+OPTFFF 6,44,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_fs.c><dfs_fs.c> 
+OPTFFF 6,45,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_raw.c><dfs_raw.c> 
+OPTFFF 6,46,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_util.c><dfs_util.c> 
+OPTFFF 6,47,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_cache.c><dfs_cache.c> 
+OPTFFF 6,48,1,0,0,0,0,0,<..\..\filesystem\dfs\src\dfs_posix.c><dfs_posix.c> 
+OPTFFF 6,49,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\efs.c><efs.c> 
+OPTFFF 6,50,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\extract.c><extract.c> 
+OPTFFF 6,51,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\partition.c><partition.c> 
+OPTFFF 6,52,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\base\plibc.c><plibc.c> 
+OPTFFF 6,53,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\dir.c><dir.c> 
+OPTFFF 6,54,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fat.c><fat.c> 
+OPTFFF 6,55,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\file.c><file.c> 
+OPTFFF 6,56,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\fs.c><fs.c> 
+OPTFFF 6,57,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ls.c><ls.c> 
+OPTFFF 6,58,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\time.c><time.c> 
+OPTFFF 6,59,1,0,0,0,0,0,<..\..\filesystem\dfs\filesystems\efsl\src\fs\vfat\ui.c><ui.c> 
+OPTFFF 7,60,1,1,0,0,0,0,<..\..\net\lwip\src\core\dhcp.c><dhcp.c> 
+OPTFFF 7,61,1,0,0,0,0,0,<..\..\net\lwip\src\core\dns.c><dns.c> 
+OPTFFF 7,62,1,0,0,247,247,0,<..\..\net\lwip\src\core\init.c><init.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,139,2,0,0,42,1,0,0 }
+OPTFFF 7,63,1,0,0,0,0,0,<..\..\net\lwip\src\core\netif.c><netif.c> 
+OPTFFF 7,64,1,0,0,0,0,0,<..\..\net\lwip\src\core\pbuf.c><pbuf.c> 
+OPTFFF 7,65,1,0,0,0,0,0,<..\..\net\lwip\src\core\raw.c><raw.c> 
+OPTFFF 7,66,1,0,0,0,0,0,<..\..\net\lwip\src\core\stats.c><stats.c> 
+OPTFFF 7,67,1,0,0,0,0,0,<..\..\net\lwip\src\core\sys.c><sys.c> 
+OPTFFF 7,68,1,0,0,381,381,0,<..\..\net\lwip\src\core\tcp.c><tcp.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,227,2,0,0,158,1,0,0 }
+OPTFFF 7,69,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_in.c><tcp_in.c> 
+OPTFFF 7,70,1,0,0,0,0,0,<..\..\net\lwip\src\core\tcp_out.c><tcp_out.c> 
+OPTFFF 7,71,1,0,0,0,0,0,<..\..\net\lwip\src\core\udp.c><udp.c> 
+OPTFFF 7,72,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\autoip.c><autoip.c> 
+OPTFFF 7,73,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\icmp.c><icmp.c> 
+OPTFFF 7,74,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\igmp.c><igmp.c> 
+OPTFFF 7,75,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet.c><inet.c> 
+OPTFFF 7,76,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\inet_chksum.c><inet_chksum.c> 
+OPTFFF 7,77,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip.c><ip.c> 
+OPTFFF 7,78,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_addr.c><ip_addr.c> 
+OPTFFF 7,79,1,0,0,0,0,0,<..\..\net\lwip\src\core\ipv4\ip_frag.c><ip_frag.c> 
+OPTFFF 7,80,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_in.c><msg_in.c> 
+OPTFFF 7,81,1,0,0,0,0,0,<..\..\net\lwip\src\core\snmp\msg_out.c><msg_out.c> 
+OPTFFF 7,82,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_lib.c><api_lib.c> 
+OPTFFF 7,83,1,0,0,0,0,0,<..\..\net\lwip\src\api\api_msg.c><api_msg.c> 
+OPTFFF 7,84,1,0,0,0,0,0,<..\..\net\lwip\src\api\err.c><err.c> 
+OPTFFF 7,85,1,0,0,0,0,0,<..\..\net\lwip\src\api\netbuf.c><netbuf.c> 
+OPTFFF 7,86,1,0,0,0,0,0,<..\..\net\lwip\src\api\netdb.c><netdb.c> 
+OPTFFF 7,87,1,0,0,0,0,0,<..\..\net\lwip\src\api\netifapi.c><netifapi.c> 
+OPTFFF 7,88,1,1,0,0,0,0,<..\..\net\lwip\src\api\tcpip.c><tcpip.c> 
+OPTFFF 7,89,1,0,0,0,0,0,<..\..\net\lwip\src\netif\etharp.c><etharp.c> 
+OPTFFF 7,90,1,0,0,0,0,0,<..\..\net\lwip\src\netif\ethernetif.c><ethernetif.c> 
+OPTFFF 7,91,1,0,0,0,0,0,<..\..\net\lwip\src\netif\loopif.c><loopif.c> 
+OPTFFF 7,92,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch_init.c><sys_arch_init.c> 
+OPTFFF 7,93,1,0,0,0,0,0,<..\..\net\lwip\src\arch\sys_arch.c><sys_arch.c> 
+OPTFFF 7,94,1,0,0,0,0,0,<..\..\net\lwip\src\api\sockets.c><sockets.c> 
+OPTFFF 7,95,1,0,0,0,0,0,<..\..\net\lwip\src\core\memp_tiny.c><memp_tiny.c> 
+OPTFFF 8,96,1,0,0,0,0,0,<..\..\net\apps\chargen.c><chargen.c> 
+OPTFFF 8,97,1,671088640,0,1,14,0,<..\..\net\apps\ftpd.c><ftpd.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,183,2,0,0,100,1,0,0 }
+OPTFFF 8,98,1,0,0,0,0,0,<..\..\net\apps\sntp.c><sntp.c> 
+OPTFFF 8,99,1,0,0,46,46,0,<..\..\net\apps\tcpecho.c><tcpecho.c> { 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,66,0,0,0,87,0,0,0,205,2,0,0,129,1,0,0 }
+OPTFFF 8,100,1,486539264,0,0,0,0,<..\..\net\apps\tftp.c><tftp.c> 
+OPTFFF 8,101,1,0,0,0,0,0,<..\..\net\apps\udpecho.c><udpecho.c> 
+OPTFFF 8,102,1,0,0,0,0,0,<..\..\net\apps\tcpclient.c><tcpclient.c> 
+OPTFFF 8,103,1,0,0,0,0,0,<..\..\net\apps\tcpserver.c><tcpserver.c> 
+OPTFFF 8,104,1,0,0,0,0,0,<..\..\net\apps\udpclient.c><udpclient.c> 
+OPTFFF 8,105,1,0,0,0,0,0,<..\..\net\apps\udpserver.c><udpserver.c> 
+OPTFFF 8,106,1,369098754,0,1,16,0,<..\..\net\apps\netio.c><netio.c> { 44,0,0,0,2,0,0,0,3,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,44,0,0,0,58,0,0,0,183,2,0,0,100,1,0,0 }
 
+ExtF <E:\SVN-Google-Source\net\apps\ping.c> 153,153,0,{ 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,88,0,0,0,116,0,0,0,227,2,0,0,158,1,0,0 }
+ExtF <E:\SVN-Google-Source\src\kservice.h> 80,84,0,{ 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,22,0,0,0,29,0,0,0,170,2,0,0,36,1,0,0 }
+ExtF <E:\SVN-Google-Source\net\lwip\src\lwipopts.h> 13,13,0,{ 44,0,0,0,0,0,0,0,1,0,0,0,255,255,255,255,255,255,255,255,252,255,255,255,226,255,255,255,0,0,0,0,0,0,0,0,139,2,0,0,42,1,0,0 }
 
 TARGOPT 1, (RT-Thread/LM3S)
  ADSCLK=6000000
diff --git a/bsp/lm3s/project_lwip_dfs.Uv2 b/bsp/lm3s/project_lwip_dfs.Uv2
index 94bad23c2..2fc50ee93 100644
--- a/bsp/lm3s/project_lwip_dfs.Uv2
+++ b/bsp/lm3s/project_lwip_dfs.Uv2
@@ -18,6 +18,7 @@ File 1,1,<.\startup.c><startup.c>
 File 1,5,<.\rtconfig.h><rtconfig.h>
 File 1,1,<.\sdcard.c><sdcard.c>
 File 1,1,<.\luminaryif.c><luminaryif.c>
+File 1,5,<.\board.h><board.h>
 File 2,1,<..\..\src\clock.c><clock.c>
 File 2,1,<..\..\src\device.c><device.c>
 File 2,1,<..\..\src\idle.c><idle.c>
@@ -112,6 +113,11 @@ File 8,1,<..\..\net\apps\sntp.c><sntp.c>
 File 8,1,<..\..\net\apps\tcpecho.c><tcpecho.c>
 File 8,1,<..\..\net\apps\tftp.c><tftp.c>
 File 8,1,<..\..\net\apps\udpecho.c><udpecho.c>
+File 8,1,<..\..\net\apps\tcpclient.c><tcpclient.c>
+File 8,1,<..\..\net\apps\tcpserver.c><tcpserver.c>
+File 8,1,<..\..\net\apps\udpclient.c><udpclient.c>
+File 8,1,<..\..\net\apps\udpserver.c><udpserver.c>
+File 8,1,<..\..\net\apps\netio.c><netio.c>
 
 
 Options 1,0,0  // Target 'RT-Thread/LM3S'
diff --git a/bsp/lm3s/rtconfig.h b/bsp/lm3s/rtconfig.h
index 7235c6455..416b704e7 100644
--- a/bsp/lm3s/rtconfig.h
+++ b/bsp/lm3s/rtconfig.h
@@ -116,7 +116,7 @@
 #define RT_LWIP_ETH_PAD_SIZE 2
 
 /* TCP sender buffer space*/
-#define RT_LWIP_TCP_SND_BUF	2048
+#define RT_LWIP_TCP_SND_BUF	1024*8
 /* Enable SNMP protocol*/
 /* #define RT_LWIP_SNMP */
 
diff --git a/bsp/lm3s/rtconfig.py b/bsp/lm3s/rtconfig.py
index 334745dac..83bec409d 100644
--- a/bsp/lm3s/rtconfig.py
+++ b/bsp/lm3s/rtconfig.py
@@ -21,7 +21,7 @@ CPU='lm3s'
 #EXEC_PATH = 'E:/Program Files/CodeSourcery/Sourcery G++ Lite/bin'
 PLATFORM = 'armcc'
 EXEC_PATH = 'E:/Keil'
-BUILD = 'debug'
+BUILD = 'release'
 
 if PLATFORM == 'gcc':
     # toolchains
diff --git a/libcpu/arm/lm3s/start_rvds.S b/libcpu/arm/lm3s/start_rvds.S
index 994d95f7d..f6eab2e85 100644
--- a/libcpu/arm/lm3s/start_rvds.S
+++ b/libcpu/arm/lm3s/start_rvds.S
@@ -65,7 +65,7 @@ __heap_limit
 		IMPORT rt_hw_pend_sv
 		IMPORT rt_hw_timer_handler
 		IMPORT rt_hw_uart_isr_1
-		IMPORT luminaryif_isr
+		IMPORT rt_hw_eth_handler
 		IMPORT rt_hw_hard_fault
 
 ;******************************************************************************
@@ -148,7 +148,7 @@ __Vectors
         DCD     IntDefaultHandler           ; CAN0
         DCD     IntDefaultHandler           ; CAN1
         DCD     IntDefaultHandler           ; CAN2
-        DCD     luminaryif_isr   	        ; Ethernet
+        DCD     rt_hw_eth_handler   	        ; Ethernet
         DCD     IntDefaultHandler          	; Hibernate
         DCD     IntDefaultHandler           ; USB0
         DCD     IntDefaultHandler           ; PWM Generator 3
diff --git a/net/apps/netio.c b/net/apps/netio.c
new file mode 100644
index 000000000..c603acc94
--- /dev/null
+++ b/net/apps/netio.c
@@ -0,0 +1,370 @@
+/**
+ * @file
+ * MetIO Server
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+#include "lwip/opt.h"
+
+#if LWIP_TCP
+#include "lwip/tcp.h"
+
+/*
+ * This implements a netio server.
+ *  The client sends a command word (4 bytes) then a data length word (4 bytes).
+ *  If the command is "receive", the server is to consume "data length" bytes into
+ *   a circular buffer until the first byte is non-zero, then it is to consume
+ *   another command/data pair.
+ *  If the command is "send", the server is to send "data length" bytes from a circular
+ *   buffer with the first byte being zero, until "some time" (6 seconds in the
+ *   current netio126.zip download) has passed and then send one final buffer with
+ *   the first byte being non-zero. Then it is to consume another command/data pair.
+ */
+
+/* See http://www.nwlab.net/art/netio/netio.html to get the netio tool */
+
+/* implementation options */
+#define NETIO_BUF_SIZE              (4 * 1024)
+#define NETIO_USE_STATIC_BUF        0
+
+/* NetIO server state definition */
+#define NETIO_STATE_WAIT_FOR_CMD    0
+#define NETIO_STATE_RECV_DATA       1
+#define NETIO_STATE_SEND_DATA       2
+#define NETIO_STATE_SEND_DATA_LAST  3
+#define NETIO_STATE_DONE            4
+
+struct netio_state {
+  u32_t  state;
+  u32_t  cmd;
+  u32_t  data_len;
+  u32_t  cntr;
+  u8_t * buf_ptr;
+  u32_t  buf_pos;
+  u32_t  first_byte;
+  u32_t  time_stamp;
+};
+
+/* NetIO command protocol definition */
+#define NETIO_CMD_QUIT              0
+#define NETIO_CMD_C2S               1
+#define NETIO_CMD_S2C               2
+#define NETIO_CMD_RES               3
+
+static err_t netio_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
+
+static void
+netio_close(void *arg, struct tcp_pcb *pcb)
+{
+  err_t err;
+
+  struct netio_state *ns = arg;
+  ns->state = NETIO_STATE_DONE;
+  tcp_recv(pcb, NULL);
+  err = tcp_close(pcb);
+
+  if (err != ERR_OK) {
+    /* closing failed, try again later */
+    tcp_recv(pcb, netio_recv);
+  } else {
+    /* closing succeeded */
+#if NETIO_USE_STATIC_BUF != 1
+    if(ns->buf_ptr != NULL){
+      mem_free(ns->buf_ptr);
+    }
+#endif
+    tcp_arg(pcb, NULL);
+    tcp_poll(pcb, NULL, 0);
+    tcp_sent(pcb, NULL);
+    if (arg != NULL) {
+      mem_free(arg);
+    }
+  }
+}
+
+static err_t
+netio_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  struct netio_state *ns = arg;
+  u8_t * data_ptr;
+  u32_t data_cntr;
+  struct pbuf *q = p;
+  u16_t len;
+
+  if (p != NULL) {
+    tcp_recved(pcb, p->tot_len);
+  }
+
+  if (err == ERR_OK && q != NULL) {
+
+    while (q != NULL) {
+      data_cntr = q->len;
+      data_ptr = q->payload;
+      while (data_cntr--) {
+        if (ns->state == NETIO_STATE_DONE){
+          netio_close(ns, pcb);
+          break;
+        } else if (ns->state == NETIO_STATE_WAIT_FOR_CMD) {
+          if (ns->cntr < 4) {
+            /* build up the CMD field */
+            ns->cmd <<= 8;
+            ns->cmd |= *data_ptr++;
+            ns->cntr++;
+          } else if (ns->cntr < 8) {
+            /* build up the DATA field */
+            ns->data_len <<= 8;
+            ns->data_len |= *data_ptr++;
+            ns->cntr++;
+
+            if (ns->cntr == 8) {
+              /* now we have full command and data words */
+              ns->cntr = 0;
+              ns->buf_pos = 0;
+              ns->buf_ptr[0] = 0;
+              if (ns->cmd == NETIO_CMD_C2S) {
+                ns->state = NETIO_STATE_RECV_DATA;
+              } else if (ns->cmd == NETIO_CMD_S2C) {
+                ns->state = NETIO_STATE_SEND_DATA;
+                /* start timer */
+                ns->time_stamp = rt_tick_get();
+                /* send first round of data */
+
+                len = tcp_sndbuf(pcb);
+                len = LWIP_MIN(len, ns->data_len - ns->cntr);
+                len = LWIP_MIN(len, NETIO_BUF_SIZE - ns->buf_pos);
+
+                do {
+                  err = tcp_write(pcb, ns->buf_ptr + ns->buf_pos, len, TCP_WRITE_FLAG_COPY);
+                  if (err == ERR_MEM) {
+                    len /= 2;
+                  }
+                } while ((err == ERR_MEM) && (len > 1));
+
+                ns->buf_pos += len;
+                ns->cntr    += len;
+
+              } else {
+                /* unrecognized command, punt */
+                ns->cntr = 0;
+                ns->buf_pos = 0;
+                ns->buf_ptr[0] = 0;
+                netio_close(ns, pcb);
+                break;
+              }
+            }
+          } else {
+            /* in trouble... shouldn't be in this state! */
+          }
+
+        } else if (ns->state == NETIO_STATE_RECV_DATA) {
+
+          if(ns->cntr == 0){
+            /* save the first byte of this new round of data
+             * this will not match ns->buf_ptr[0] in the case that
+             *   NETIO_BUF_SIZE is less than ns->data_len.
+             */
+            ns->first_byte = *data_ptr;
+          }
+
+          ns->buf_ptr[ns->buf_pos++] = *data_ptr++;
+          ns->cntr++;
+
+          if (ns->buf_pos == NETIO_BUF_SIZE) {
+            /* circularize the buffer */
+            ns->buf_pos = 0;
+          }
+
+          if(ns->cntr == ns->data_len){
+            ns->cntr = 0;
+            if (ns->first_byte != 0) {
+              /* if this last round did not start with 0,
+               *  go look for another command */
+              ns->state = NETIO_STATE_WAIT_FOR_CMD;
+              ns->data_len = 0;
+              ns->cmd = 0;
+              /* TODO LWIP_DEBUGF( print out some throughput calculation results... ); */
+            } else {
+              /* stay here and wait on more data */
+            }
+          }
+
+        } else if (ns->state == NETIO_STATE_SEND_DATA
+            || ns->state == NETIO_STATE_SEND_DATA_LAST) {
+          /* I don't think this should happen... */
+        } else {
+          /* done / quit */
+          netio_close(ns, pcb);
+          break;
+        } /* end of ns->state condition */
+      } /* end of while data still in this pbuf */
+
+      q = q->next;
+    }
+
+    pbuf_free(p);
+
+  } else {
+
+    /* error or closed by other side */
+    if (p != NULL) {
+      pbuf_free(p);
+    }
+
+    /* close the connection */
+    netio_close(ns, pcb);
+
+  }
+  return ERR_OK;
+
+}
+
+static err_t
+netio_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+  struct netio_state *ns = arg;
+  err_t err = ERR_OK;
+
+  if (ns->cntr >= ns->data_len && ns->state == NETIO_STATE_SEND_DATA) {
+    /* done with this round of sending */
+    ns->buf_pos = 0;
+    ns->cntr = 0;
+
+    /* check if timer expired */
+    if (rt_tick_get() - ns->time_stamp > 600) {
+      ns->buf_ptr[0] = 1;
+      ns->state = NETIO_STATE_SEND_DATA_LAST;
+    } else {
+      ns->buf_ptr[0] = 0;
+    }
+  }
+
+  if(ns->state == NETIO_STATE_SEND_DATA_LAST || ns->state == NETIO_STATE_SEND_DATA){
+    len = tcp_sndbuf(pcb);
+    len = LWIP_MIN(len, ns->data_len - ns->cntr);
+    len = LWIP_MIN(len, NETIO_BUF_SIZE - ns->buf_pos);
+
+    if(ns->cntr < ns->data_len){
+      do {
+        err = tcp_write(pcb, ns->buf_ptr + ns->buf_pos, len, TCP_WRITE_FLAG_COPY);
+        if (err == ERR_MEM) {
+          len /= 2;
+        }
+      } while ((err == ERR_MEM) && (len > 1));
+
+      ns->buf_pos += len;
+      if(ns->buf_pos >= NETIO_BUF_SIZE){
+        ns->buf_pos = 0;
+      }
+
+      ns->cntr += len;
+    }
+  }
+
+  if(ns->cntr >= ns->data_len && ns->state == NETIO_STATE_SEND_DATA_LAST){
+    /* we have buffered up all our data to send this last round, go look for a command */
+   ns->state = NETIO_STATE_WAIT_FOR_CMD;
+   ns->cntr  = 0;
+   /* TODO LWIP_DEBUGF( print out some throughput calculation results... ); */
+  }
+
+  return ERR_OK;
+}
+
+static err_t
+netio_poll(void *arg, struct tcp_pcb *pcb)
+{
+  struct netio_state * ns = arg;
+  if(ns->state == NETIO_STATE_SEND_DATA){
+
+  } else if(ns->state == NETIO_STATE_DONE){
+    netio_close(ns, pcb);
+  }
+
+  return ERR_OK;
+
+}
+
+#if NETIO_USE_STATIC_BUF == 1
+static u8_t netio_buf[NETIO_BUF_SIZE];
+#endif
+
+static err_t
+netio_accept(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  struct netio_state * ns;
+
+  LWIP_UNUSED_ARG(err);
+
+  ns = mem_malloc(sizeof(struct netio_state));
+
+  if(ns == NULL){
+    return ERR_MEM;
+  }
+
+  ns->state = NETIO_STATE_WAIT_FOR_CMD;
+  ns->data_len = 0;
+  ns->cmd = 0;
+  ns->cntr = 0;
+  ns->buf_pos = 0;
+#if NETIO_USE_STATIC_BUF == 1
+  ns->buf_ptr = netio_buf;
+#else
+  ns->buf_ptr = mem_malloc(NETIO_BUF_SIZE);
+
+  if(ns->buf_ptr == NULL){
+    mem_free(ns);
+    return ERR_MEM;
+  }
+#endif
+
+  ns->buf_ptr[0] = 0;
+
+  tcp_arg(pcb, ns);
+  tcp_sent(pcb, netio_sent);
+  tcp_recv(pcb, netio_recv);
+  tcp_poll(pcb, netio_poll, 4); /* every 2 seconds */
+  return ERR_OK;
+}
+
+void netio_init(void)
+{
+  struct tcp_pcb *pcb;
+
+  pcb = tcp_new();
+  tcp_bind(pcb, IP_ADDR_ANY, 18767);
+  pcb = tcp_listen(pcb);
+  tcp_accept(pcb, netio_accept);
+}
+
+#endif /* LWIP_TCP */
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT(netio_init, netio server);
+#endif