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the typical 0.70 version of ‘dhcpcd’) which is executed when an IP is first obtained, or should the
IP address change (the common operation is to execute every time an IP lease is renewed). The
command is invoked with zero or more parameters. Often the command is ‘/bin/sh’, and the
parameter is a script file.
If the ‘-v’ option is specified, the IP address is written to ‘stdout’ as the command file is invoked.
Unlike ‘ifattach’, the IP address is not immediately obtained; the command file is executed when
the IP has been obtained. At this point, network access is available; therefore it is common
practice to mount network drives using the command file.
For example, the ‘/etc/rc’ file contains:
/sbin/dhcpcd -p -c /etc/dhcpcd.sh &
and the ‘/etc/dhcpcd.sh’ file contains:
echo “We have network access!”
/sbin/ifconfig
mount [...]
Accessing your dimmPCI development board via telnet
If the dimmPCI
TM
development board is connected to an IP network, it can be accessed using
telnet, just like using a serial interface. To take advantage of this, the IP address of the board
needs to be known. It will be stored in the ‘/etc/rc’ file in the ‘romdisk’ directory. Suppose the
address of the board is 192.168.10.51. Type the following command.
telnet 192.168.10.51
A login prompt will appear. The procedure for logging in is the same as for the serial interface.
Enter ‘root’ as the username, and press ‘Return’ at the password prompt. Note that the telnet
access procedure is the same as that of the serial console connection.
Compiling your own source code
The cross compiler for the DragonBall processor onboard the dimmPCI module is installed along
with your kernel source and file system so it should be ready for use. In the ‘dimmpci’ directory,
create a new directory called source.