Cirrus Logic EDB9302A Bedienungsanleitung PDF herunterladen (Seite 13)

negotiation required with tftp and this makes it compatible with the Redboot load

command.

Generic FTP Clinet for Windows PC

In order to move the new GESBC-9302 ramdisk file system from the Debian PC

to the tfpt server folder, a generic FTP client is needed for the Win PC. I use WS

FTP. This is a very old FTP freeware client dating from Win 3.1, but it is small

(about 200K) and easy to get running. The ramdisk file is 1.7 Mbytes when

gzipped, so it is just a bit too big for transfer by floppy to the Win PC. Any

generic FTP client that can log into the Debian FTP server can be used,

however.

Preparing the New Ramdisk File on the Debian Development PC

The modified GESBC-9302 file system currently exists as a series of directories

and files on the Debian development PC in /armfiles. This is useful for testing

and development, but what we need is a single file to upload to the GESBC-9302

flash. The way we get to a single file is very clever: the original ramdisk file is

again mounted as a loop device, the changed and new files are copied from the

development /armfiles directory to the mounted ramdisk. When the ramdisk file

is umounted, all the changes are preserved!

The changes we made to the file system were to delete the existing webpages,

add a new index webpage, and add a new line to the rc.sysinit file. So we will

mount the original ramdisk file, delete the two existing webpages, and copy

index.html and rc.sysinit from the /armfiles development directory. As a

precaution, we will first save a copy of the original ramdisk file.

cd /armdisk

cp ramdisk ramdisk.bak

Next, we mount ramdisk as a loop device, then change directories and come

back in to /armdisk to operate on the mounted file system.

mount –o loop /armdisk/ramdisk /armdisk

cd /

cd /armdisk

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Cirrus Logic EDB9302A Bedienungsanleitung Seite 13