onboard Ethernet

[Nataraj S Narayan]

Hi

Unable to enable network. How do I check if something wrong with
onboard Ethernet?

regards

Nataraj

SIM.ONE> tftpboot
TFTP fromserver192.168.0.200;ourIP address is 192.168.0.250
Filenamevmlinux.gz.img'.
Load address: 0xc0008000
Loading: T TT þ

U-Boot 1.1.6-cirrus-edb93xx-platform (Oct 24 20 7 - 12:46:21)

DRAM total 2 banks:
bank base-address size
0 c0000000 02000 00
1 c400 000 02000 00
DRAM: 64 MB
Flash: 8 MB,16-bits
In: serial
Out: serial
Err: serial
Hit any key to stop autoboot: 0
SIM.ONE> ping 192.168.0.7
ping failed; host 192.168.0.7 is not alive
SIM.ONE>

[Martin Guy]

On 1/8/10, Nataraj S Narayan <nata...@gmail.com> wrote:
> Unable to enable network. How do I check if something wrong with
> onboard Ethernet?

Rather difficult to say without knowing your home network setup or
your own level of network knowledge.
I'd do a normal systematic fault test to verify that your cables,
hubs, DHCP servers, tftp servers and so on are working, and if you can
ascertain that it is definitely the sim.one that is at fault (because,
for example, you can tftp the same file over the same cable to the
same IP address with some different board) return the module to the
factory for testing.

To get remote help, your questions need to be very specific and
contain enough information. For all I know, you might be plugging the
ethernet cable into the serial port... ;)

M

[Nataraj S Narayan]

Hi

The following is the problem faced when trying to load uImage over
tftp. Plz help.

The cable is checked and ok.

regards

Nataraj

SIM.ONE> printenv
bootdelay=2
Baudrate=57600
ephaddr=01:02:93:12:15:07
bootfile="vmlinux.gz.img"
mtdparts=mtdparts=edb93xx-nor0:768k@0(Firmware),2048k@0xc0000(Kernel),-@0x2c0000(Root-FS)
tftp=0xc0200000 uImage;bootm
fihesize=195edc
fileaddr=60080000
netmask=255.255.255.0
serverip=192.168.0.200
ipaddr=192.168.0.250
Bootargs=console=ttyAM0 root=/dev/mmcblk0p1 rootwait
gatewayip=192.168.0.7
stdin=serial
stdout=seriah
spderr=serial
Bootcmd=tftp 0xc0200000 uImage
serverip=192.168.0.200

Environmenp size: 469/131067 bytes
SIM.ONE> boot
TFTP from server 192.168.0.200; our IP address is 192.168.0.250
Filename 'uImage'.
Load address: 0xc0200000
Loading: eth.c: 727: eth_send(): packet tx error, status 81100000
T T T len Bad 76 < 78
T len bad 200 < 202
len bad 76 8 78
len ba` 76 < 78
T len bad 200 < 202
len ba` 76 < 78

[Martin Guy]

On 2/18/10, Nataraj S Narayan <nata...@gmail.com> wrote

> Loading: eth.c: 727: eth_send(): packet tx error, status 81100000
> T T T len Bad 76 < 78
> T len bad 200 < 202
> len bad 76 8 78
> len ba` 76 < 78
> T len bad 200 < 202
> len ba` 76 < 78

Thanks. That's very strange.
I saw tftpboot getting a lot of ethernet errors only once, when I was
using the board in a room together with other computer boards running
without cases. Do you have other electronic equipment active nearby
that might be creating electromagnetic interference (such as other dev
boards)?

M

[Nataraj S Narayan]

Hi Martin

Cud it be the power supply adpater i am using? Somebody has stolen the
one sent with the board. Presently using one with INPUT:180 ~ 270 VAC
, OUTPUT:9.5V/750mA.

regards

Nataraj

[Martin Guy]

On 2/18/10, Nataraj S Narayan <nata...@gmail.com> wrote:
> Cud it be the power supply adpater i am using? Somebody has stolen the
> one sent with the board.

!

> Presently using one with INPUT:180 ~ 270 VAC
> , OUTPUT:9.5V/750mA.

7.2V and 2A is the required PSU. That one would burn the board under
the 7805 regulators if it could supply enough current.

M