Cirrus Logic EDB9302A Uživatelský manuál stáhnout pdf (Strana 7)

When successful, you will have the entire RAM disk file system of the GESBC-

9302 captured permanently to /armfiles on your Debian development machine.

Now you can make changes and they will not disappear when you power down

the GESBC-9302.

The screenshot below shows the sequence of commands that copies the

GESBC-9302 file system to /armfiles.

Booting the GESBC-9302 from the NFS Server

Now that we have the complete GESBC-9302 file system residing on the Debian

system, and we have the NFS server operational, we can interrupt the Redboot

loading process to tell it to mount the file system via NFS at /armfiles.

To do this, we connect the GESBC-9302 to the serial port of a PC and launch

Hyper-Terminal configured for Com1, 57,600 baud, 8, N, 1. When the GESBC-

9302 power switch is thrown, Redboot starts its normal loading sequence.

To interrupt this, press ^C on the terminal keyboard (control C). This causes

Redboot to wait for commands from the serial console. First we load the Linux

kernel image with the following command:

fis load zimage

Next, we direct Redboot to load the GESBC-9302 file system from the NFS

server on the Debian machine:

exec –c “root=/dev/nfs nfsroot=192.168.0.125:/armfiles ip=192.168.0.127

console=ttyAM0”

This is a very long command but it tells Redboot that the file system will come

from the NFS server at IP address 192.168.0.125 (the Debian machine) and that

the GESBC-9302 machine will be assigned to IP address 192.168.0.127. The

terminal will be running as ttyAM0. Don’t leave out the “ in the command, they

are necessary.

DebDevel:/armdisk# cp -r /armdisk/* /armfiles

DebDevel:/armdisk# cd /armfiles

DebDevel:/armfiles# ls

a.out bin dev etc home lib mnt proc sbin tmp usr var

DebDevel:/armfiles#

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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Cirrus Logic EDB9302A Uživatelský manuál Strana 7