ICE v2 + lwip + enetlwip sample not working ?

Romain Farkas,

The LWIP example assigns a static IP address 192.168.1.2 to the application.

Can you try executing the application with ETH0 connected to a machine with an IP address of same subnet?

Regard,
Vinesh

Hi Vinesh,

I have tried that but it doesn't work. While debugging I have discovered lwIPInit fails; moreover, stepping in I can confirm that 

netif_add(&cpswNetIF[ifNum], &ip_addr, &net_mask, &gw_addr,&cpswPortIf[ifNum], cpswif_init, tcpip_input))

fails as well.

So the network interface cannot be brought up.

Best,

Romain

Romain,

There could be many reasons for failure of netif_add, but it is usually because MDIO Alive/Link register for the particular port is not set. 

Are the Ethernet LEDs showing correct behavior on plugging/unplugging the port? 

Regards,
Vinesh

Dear Vinesh,

The right-hand side LED turns orange (on/off) on plugging/unplugging the port. 

The left-hand side LED blinks green whenever I ping the ICE2 from a workstation on the same subnet.

With a protocol analyzer such as Wireshark I can confirm there is no reply from 192.168.1.2 on a ping request, which is normal as the network interface cannot be brought up.

Romain

Romain,

That is the desired behavior meaning the jumper settings should be correct. 

I am not sure what's missing here, but can you recheck on these points?

• The Jumper settings to configure ICEv2 for CPSW mode
• Ethernet cable is plugged in(to Ethernet 0) at the start of execution
• The end machine is in the same subnet

Also, the prebuilt binaries for these applications are available here. Can you try loading the enetLwip application via SD card or by flashing it to SPI?

Another way to do a hardware check is by using the ethernetip_adapter application.

Regards,
Vinesh

Hi Vinesh,

Thank you, this solved my issue. It looks like it is mandatory to have the Ethernet cable plugged in to bring up the Ethernet interface. 

Any idea why ?

Thanks.

Romain

Hi,

I am sorry to ask you the same question,
even I am struck in exactly the same situation.

The Jumper settings and the LED blinks seems OK but the UART output
always says.

Acquiring IP Address for Port 1
Port 1 IP Address Acquisition Failed.

Below is the Static IP address settings in the enetLwip.c of enetLwip_sysbios sample project.

lwipIfPort1.instNum = 0;
lwipIfPort1.slvPortNum = 1;
lwipIfPort1.ipAddr = STATIC_IP_ADDRESS_PORT1; // 0xc0a80102(192.168.1.2)
lwipIfPort1.netMask = 0xffffff00; //255.255.255.0
lwipIfPort1.gwAddr = 0xc0a80101; //192.168.1.1
lwipIfPort1.ipMode = IPADDR_USE_STATIC;

And below is the IP address settings of my PC.

IP address  192.168.1.3
Subnet mask  255.255.255.0
Default gateway  192.168.1.1

Please let me know what else should be taken care to get the communication working.

Regards
Prad

Prad,

Is the ethernet cable plugged in at the time of execution?

Regards,
Vinesh

Vinesh,

Yes, the cable is plugged in at the time of execution,
the jumper setting is changed to CPSW(Ethernet 0).

Regards
Prad

Prad,

As I mentioned earlier, only a few things have to be taken care for executing this example.

Can you provide more debug information? When the IP Address acquisition fails, it indicates lwIPInit fails. Can you try stepping into this and check what goes wrong?

Regards,

Vinesh

Hi Vinesh,

Thank you so much for your time.

Below is the debug information.

The return value of the "ipAddr = lwIPInit(&lwipIfPort1);" from the enetLwip.c
seems to be zero.

I tried to step into lwIPInit() function and the execution ends at "return 0" point below.

unsigned int lwIPInit(LWIP_IF *lwipIf)
{

........

........

#ifdef sys_bios_ind_sdk
if(NULL ==
netif_add(&cpswNetIF[ifNum], &ip_addr, &net_mask, &gw_addr,
&cpswPortIf[ifNum], cpswif_init, tcpip_input))

#else
if(NULL ==
netif_add(&cpswNetIF[ifNum], &ip_addr, &net_mask, &gw_addr,
&cpswPortIf[ifNum], cpswif_init, ip_input))
#endif
{
LWIP_PRINTF("\n\rUnable to add interface for interface %d", ifNum);
return 0;
}

..........

..........

ipAddrPtr = (unsigned int*)&(cpswNetIF[ifNum].ip_addr);

return (*ipAddrPtr);
}

And the "*ipAddrPtr" value is "0xFFFFFFFF".

Regards
Prad

Prad, 

There can be many reasons for netif_add to return 0, but usually the issue is because the mdio is not able to detect a link. If you go further in, you can see that the MDIO checks for the "ALIVE" and "LINK" status. Can you please check if these values are getting reflected correctly?

Regards,
Vinesh