Ethernet connection issue with AM335x Starter Kit

Pengyuan Chen

Hi there,

I meet a problem with "eth0" of my AM335x Starter Kit. I know that there might be similar questions that have been posted and solved in past.

Well, caused that I am pretty new for the Linux Embedded System, I could not exactly know what is the problem with my SK's Ethernet.

Hereby, I will try to illustrate my observation as clear as possible.

I am trying to upload the QT file ("helloword") to my AM335x SK. Given the wiki insturation, I would type "scp helloworld root@xx.xx.xx.xx:\home\root". And I expect to see the "hello world" on the touch screen.

And when I tried to copy the file, the linux always told me "loss connection/permission denied"

Now, I realize that the problem is: the ethernet0 on the AM335x cannot be linked or accessed by my Ubuntu 14.04, even though I could manually set an IP address to the AM335x Starter Kit and the Ethernet 0 in my Linux system.

But, I cannot PING from Ubuntu to AM335x, either PING from AM335x to Ubuntu.

I guess that there would be multiple issue with my Kernel settings or my SDK settings. And I could not figure out the issue clearly, where I should start to solve the problem.

My SDK version is ti-processor-sdk-linux-evm-02.00.01.07, btw.

There may be also an issue with DHCP (I am not sure the name exactly). Or I may need to setup the default eth0 when I boot the SK.

Any suggestion would be appreciated. Please help.

Thanks again.

Best Regards.

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

Are you using the pre-built SDK image? Can you post the boot log?

0 Pengyuan Chen over 9 years ago in reply to Biser Gatchev-XID

Prodigy 110 points

Hello Biser,

I did several tests, and tried various SDK (08.xx.xx ~ 20.00.01.07). Well, actually I just want follow the QT training lab, and copy the file to am335x SK board.

like use command :

"xx@am335x-evm:# cp helloworld root@192.168.177.152:/home/root"

But I am pretty sure, the Ethernet link between eth0 and my linux host is failed.

Sorry for the awkward explanation, I am pretty new for the embedded system.

Here is what I did (just for presenting the problem)

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       am335x-evm login: root
Last login: Sat Jan 9 00:30:53 UTC 2016 on ttyS0
root@am335x-evm:~# ifconfig
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:18 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1252 (1.2 KiB) TX bytes:1252 (1.2 KiB)

root@am335x-evm:~# ifdown eth0
ifdown: interface eth0 not configured
root@am335x-evm:~# ifup eth0
[ 398.569706] net eth0: initializing cpsw version 1.12 (0)
[ 398.654138] net eth0: phy found : id is : 0x4dd074
[ 398.667403] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
udhcpc (v1.23.1) started
Sending discover...
[ 401.654393] cpsw 4a100000.ethernet eth0: Link is Up - 100Mbps/Full - flow cof
[ 401.662447] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Sending discover...
Sending discover...
No lease, forking to background
root@am335x-evm:~# ifconfig
eth0      Link encap:Ethernet HWaddr C4:ED:BA:8B:2B:33
          inet6 addr: fe80::c6ed:baff:fe8b:2b33/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:57 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:15206 (14.8 KiB)
          Interrupt:169

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:18 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1252 (1.2 KiB) TX bytes:1252 (1.2 KiB)

root@am335x-evm:~#

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And yes, I cannot ping my Linux host (Ubuntu 12.04 LTS 64-bit )

Here is the ifconfig of my host side

------------------------------------------------------------------------------------------------------------------------

pengyuan@pengyuan-virtual-machine:~$ ifconfig
eth0      Link encap:Ethernet HWaddr 00:0c:29:1c:53:b8
          inet addr:192.168.177.152 Bcast:192.168.177.255 Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe1c:53b8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:60603 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22737 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:70249872 (70.2 MB) TX bytes:5591014 (5.5 MB)

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:2723 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2723 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:269739 (269.7 KB) TX bytes:269739 (269.7 KB)

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Here is my interfaces settings (linux host):

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auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

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Actually, I tried to manually set the eth0 and eth1. Even though, the eth0 seemly may obtain some "address"

, the SK board still cannot ping linux host

------------------------------------------------------------------------------------------------------------------------

root@am335x-evm:~# ifdown eth0
ifdown: interface eth0 not configured
root@am335x-evm:~# ifconfig eth0 192.168.177.100 netmask 255.255.255.0 up
[ 1755.697139] net eth0: initializing cpsw version 1.12 (0)
[ 1755.784207] net eth0: phy found : id is : 0x4dd074
[ 1755.792927] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
root@am335x-evm:~# [ 1758.784310] cpsw 4a100000.ethernet eth0: Link is Up - 100f
[ 1758.792325] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

root@am335x-evm:~# ifconfig
eth0      Link encap:Ethernet HWaddr C4:ED:BA:8B:2B:33
          inet addr:192.168.177.100 Bcast:192.168.177.255 Mask:255.255.255.0
          inet6 addr: fe80::c6ed:baff:fe8b:2b33/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:24142 (23.5 KiB)
          Interrupt:169

eth1      Link encap:Ethernet HWaddr C4:ED:BA:8B:2B:35
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

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:18 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1252 (1.2 KiB) TX bytes:1252 (1.2 KiB)

root@am335x-evm:~# ping 192.168.177.152
PING 192.168.177.152 (192.168.177.152): 56 data bytes

--- 192.168.177.152 ping statistics ---
25 packets transmitted, 0 packets received, 100% packet loss
^Croot@am335x-evm:~#

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I am not sure what I am doing is correct, caused that I am pretty new for the embedded system.

But, I think that if the link is set correctly, there should be some pack responses...

Here is the interfaces setting on my AM335x side

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# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)

# The loopback interface
auto lo
iface lo inet loopback

# Wireless interfaces
iface wlan0 inet dhcp
        wireless_mode managed
        wireless_essid any
        wpa-driver wext
        wpa-conf /etc/wpa_supplicant.conf

iface tiwlan0 inet dhcp
        wireless_mode managed
        wireless_essid any

iface atml0 inet dhcp

# Wired or wireless interfaces
auto eth0
# Wired or wireless interfaces
auto eth0
iface eth0 inet dhcp
        pre-up /bin/grep -v -e "ip=[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+" /proc/cmd

iface eth1 inet dhcp

# Ethernet/RNDIS gadget (g_ether)
# ... or on host side, usbnet and random hwaddr
iface usb0 inet dhcp

# Bluetooth networking
iface bnep0 inet dhcp

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Here is the *.dts file that I used for boot my AM335x (if the board really does what I expect). I observed the patches used for SDK 07.xxxx or 06.xxxxx are inherently applied in the SDK 20.xxxxx *.dts file.

I mean the *.dts file should be fine. So, I am kind of running out of options. And still do not what is going on.

Anyway, the part, where was normally patched in previous SDKs, of am335x-evmsk.dts file is attached.

------------------------------------------------------------------------------------------------------------------------

&mac {
   pinctrl-names = "default", "sleep";
   pinctrl-0 = <&cpsw_default>;
   pinctrl-1 = <&cpsw_sleep>;
   dual_emac = <1>;
   status = "okay";
};

&davinci_mdio {
   pinctrl-names = "default", "sleep";
   pinctrl-0 = <&davinci_mdio_default>;
   pinctrl-1 = <&davinci_mdio_sleep>;
   status = "okay";
};

&cpsw_emac0 {
   phy_id = <&davinci_mdio>, <0>;
   phy-mode = "rgmii-txid";
   dual_emac_res_vlan = <1>;
};

&cpsw_emac1 {
   phy_id = <&davinci_mdio>, <1>;
   phy-mode = "rgmii-txid";
   dual_emac_res_vlan = <2>;
};

&mmc1 {
   status = "okay";
   vmmc-supply = <&vmmc_reg>;
   bus-width = <4>;
   pinctrl-names = "default", "sleep";
   pinctrl-0 = <&mmc1_pins_default>;
   pinctrl-1 = <&mmc1_pins_sleep>;
   cd-gpios = <&gpio0 6 GPIO_ACTIVE_HIGH>;
};
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I searched this issue for weeks and tried options, while I found that SDK 20.xx.xx.xx inherently solved those problems mentioned for previous SDKs.

So, I am lost totally. Please help. Thank you very much, Biser.

Best Regards

Pengyuan

0 Biser Gatchev-XID over 9 years ago in reply to Pengyuan Chen

TI__Guru**** 393215 points

From what I see your SK Ethernet setup is for IPv6:

[ 398.667403] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

It should be setup for IPv4.

0 Pengyuan Chen over 9 years ago in reply to Biser Gatchev-XID

Prodigy 110 points

Hi Biser,

Yes, that is my problem. But I am not sure how to solve it. The problem is on the Target Board side or on the Linux Host Side, I have no idea. Any suggestion for this issue? Thanks a lot.

Regards

Pengyuan

0 Biser Gatchev-XID over 9 years ago in reply to Pengyuan Chen

TI__Guru**** 393215 points

I cannot say about the Host side, but it's definitely present on the Target board. I'm not a software expert, but this should be done through kernel configuration - disable IPv6 and enable IPv4.

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Ethernet connection issue with AM335x Starter Kit