UM0844 datasheet(17/43 Pages) STMICROELECTRONICS

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UM0844

The pre-flashed software

Doc ID 16544 Rev 3

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# ifconfig eth0 192.168.1.1 broadcast 192.168.1.255 netmask

255.255.255.0

You have the option to configure the IP on the evaluation board side in a static or dynamic

way.

For a static configuration, the procedure is as follows:

Reset the board and enter U-Boot mode

Use the following commands to configure environment variables:

> setenv ipaddr 192.168.1.10

> setenv serverip 192.168.1.1

> setenv gatewayip 192.168.1.1

> setenv netmask 255.255.255.0

> setenv hostname SPEAR

> setenv ip_settings

\$(ipaddr):\$(serverip):\$(gatewayip):\$(netmask):\$(hostname):

\$(netdev):off

Modify the existing "bootargs" variable by adding the "ip" argument, as in the following

example, then save the environment:

> setenv bootargs console=ttyS0 ... ip=$(ip_settings)

> saveenv

In this way, network settings work inside U-Boot and are also automatically passed to Linux.

The dynamic configuration requires a DHCP server running on the LAN (for example, on a

Linux host PC) so that the evaluation board automatically gets an IP address at each

bootstrap.

To check if DHCP server (daemon) support is available on the PC-side, use the following

command:

$ rpm -q dhcp

If the DHCP package is not available, install it on the PC from your distribution media (for

example, Fedora Linux CDROM or website).

The next step is to create or change the DHCP configuration file /etc/dhcp/dhcpd.conf that

matches a specific network setup, as shown in the following example:

# DHCP Server Configuration file.

see /usr/share/doc/dhcp*/dhcpd.conf.sample

see 'man 5 dhcpd.conf'

default-lease-time 600;

max-lease-time 7200;

option subnet-mask 255.255.255.0;

option broadcast-address 192.168.1.255;

allow bootp; #allows kernel download using tftp

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