UM0844 datasheet(18/43 Pages) STMICROELECTRONICS

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The pre-flashed software

UM0844

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Doc ID 16544 Rev 3

ddns-update-style ad-hoc;

subnet 192.168.1.0 netmask 255.255.255.0 {

option routers 192.168.1.1;

option subnet-mask 255.255.0.0;

option domain-name "local.net";

option domain-name-servers ns.local.net;

host SPEAr300 {

hardware ethernet 00:11:22:33:44:55;

fixed-address 192.168.1.10;

option host-name "SPEAR";

next-server

192.168.1.1;

filename "uImage_300.img"; #kernel image filename in tftp path

}

With this configuration, the DHCP server replies to a request from a SPEAr evaluation board

with Ethernet MAC address 00:11:22:33:44:55 (just as in the example) by passing the entire

network configuration.

The "allow bootp" and "filename" parameters enable uBoot to download and boot a kernel

image from the host using the TFTP file transfer protocol (you will need a TFTP server on

the host, see below).

In order to apply the new configuration settings, restart he DHCP server. To do this, first

check the status of the DHCP daemon using the following commands from the Linux PC

shell:

# /etc/rc.d/init.d/dhcpd status

If the DHCP daemon is stopped, start it with the following command:

# /etc/rc.d/init.d/dhcpd start

Please be sure to disable your firewall or setup new firewall rules in order to enable

DHCP/TFTP traffic.

2.8

Updating the pre-flashed software

This section focuses on updating the contents of serial NOR Flash with default binary

images available on www.st.com.

Updating the contents of Flash memory on SPEAr evaluation boards is a recommended

step. It is possible to update the pre-flashed software coming by default with a SPEAr

evaluation board without installing the SPEAr Linux Support Package (LSP2.3).

The procedure for the update involves the installation and use of the USB flasher tool

provided by ST. This tool is a graphical interactive application, which can be downloaded

from www.st.com.

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