Mity CPU Platforms » MityDSP-L138 (ARM9 Based Platforms)

Normally, we use scp to transfer files to a remote server on the ARM.

You can configure ssh keys to allow transfers without having to type a password in, if you need it.

-Mike

Yes, I have used that.

We are developing an embedded product. Our application code will run from startup. It will create files. We are also developing a companion application on a host PC to communicate with the embedded application. The PC application needs to transfer files over the network from the embedded MityDSP unit. What is the best way to do that? I need something that can be called from within the PC application. I was thinking of using ftp or tftp rather than writing something custom on both ends. The PC application will be running under Windows.

Mary

http://stackoverflow.com/questions/3477471/whats-a-decent-sftp-command-line-client-for-windows

SFTP/SCP is automatically available through the ssh dropbear daemon on the embedded device so wouldn't require any special changes on the embedded side.

-Jon C

Alternatively you could install and setup one of the ftp/tftp servers on your embedded device.

$opkg list | grep ftpd
owftpd - 2.7p28-r0.5 - Anoymous FTP server for 1-wire access
proftpd - 1.3.2b-r0.5 - Secure ftp daemon
proftpd-dev - 1.3.2b-r0.5 - Secure ftp daemon
proftpd-doc - 1.3.2b-r0.5 - Secure ftp daemon
tftpd-hpa - 5.0-r1.6 - HPA's tftp server

Running
root@mityomapl138:/etc/init.d# opkg list | grep ftpd
yielded no results.

Running
root@mityomapl138:/etc/init.d# opkg list | more
yielded lots of results, none of them contained "ftpd" or "ftp", only "sftp".

root@mityomapl138:/etc/init.d# opkg list | grep ftp
openssh-sftp - 5.9p1-r5
openssh-sftp-server - 5.9p1-r5

Does that mean there are no ftp servers for this distribution of Linux?

Try running
opkg update

This will ask the update server for a new list of packages and then you can rerun the opkg list command. This will hopefully result in better results, otherwise its possible they don't have a ftpd package for the version of angstrom you are running.

Ok, tried that ... here's the results. I don't think the update worked.

root@mityomapl138:/etc/init.d# opkg update
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/arm
v5te/base/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/arm
v5te/debug/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/arm
v5te/gstreamer/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/arm
v5te/machine/mityomapl138/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/all
/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/arm
v5te/perl/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Downloading http://feeds.angstrom-distribution.org/feeds/v2012.05/ipk/eglibc/arm
v5te/python/Packages.gz.
wget: bad address 'feeds.angstrom-distribution.org'
Collected errors: * opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
s/v2012.05/ipk/eglibc/armv5te/base/Packages.gz, wget returned 1. * opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
s/v2012.05/ipk/eglibc/armv5te/debug/Packages.gz, wget returned 1. * opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
s/v2012.05/ipk/eglibc/armv5te/gstreamer/Packages.gz, wget returned 1. * opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
s/v2012.05/ipk/eglibc/armv5te/machine/mityomapl138/Packages.gz, wget returned 1.

• opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
  s/v2012.05/ipk/eglibc/all/Packages.gz, wget returned 1.
• opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
  s/v2012.05/ipk/eglibc/armv5te/perl/Packages.gz, wget returned 1.
• opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
  s/v2012.05/ipk/eglibc/armv5te/python/Packages.gz, wget returned 1.
  root@mityomapl138:/etc/init.d# opkg list | grep ftp
  openssh-sftp - 5.9p1-r5
  openssh-sftp-server - 5.9p1-r5
  root@mityomapl138:/etc/init.d#

That looks like either
1 - Your board is not able to see the internet
2 - You don't have a nameserver configured.
- The nameserver is specified in /etc/resolv.conf and is typically (although not always) the same as your gateway. Try

echo nameserver <ADDRESS OF YOUR NAMESERVER HERE> > /etc/resolv.conf

if your resolv.conf is not there.
If you don't know what address to use, try 8.8.8.8

cheers
/Tim

Ran the following:

root@mityomapl138:/etc# echo nameserver 8.8.8.8 > resolv.conf
root@mityomapl138:/etc# opkg update

This ran more successfully, but still had this error:

Collected errors: * opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
s/v2012.05/ipk/eglibc/armv5te/machine/mityomapl138/Packages.gz, wget returned 1

root@mityomapl138:/etc# opkg list | grep ftpd
owftpd - 2.8p15-r1 - owfs version 2.8p15-r1

Thanks for the help. My PC app developer now tells me he's found a .NET library for SFTP, so we'll go with that for now.

For completion's sake, the next step would be

opkg install owftpd

right?

Reading the online page for owftpd doesn't lead me to believe that the owftpd program is a network ftp server. It seems designed for some kind of one-wire serial link...

http://owfs.org/uploads/owftpd.1.html

This error:

Collected errors: * opkg_download: Failed to download http://feeds.angstrom-distribution.org/feed
s/v2012.05/ipk/eglibc/armv5te/machine/mityomapl138/Packages.gz, wget returned 1

is OK. We don' have any packages for the mityomapl138 registered or deployed through the angstrom feeds. You can ignore this error.

Yes, the next step would be to run the install command.

-Mike

Based on Jonathan's comment, it appears that ftp is not supported on this platform. Guess it'll have to be sftp.

Thanks for the help.
Mary

If you really must have ftp, you can recompile busybox (this is installed currently, but the option is not enabled) and add ftpd as an option. This is really how you would install it.

There is a really should link here about rebuilding it:

http://support.criticallink.com/redmine/projects/arm9-platforms/wiki/Modifying_Busybox

Certainly, the platform is capable of running ftpd. But you are correct in that we (well, really the Angstrom distribution) do not enable it in our reference filesystem.

I am sorry for the inconvenience.

-Mike