Comments on: Open-Source development on the Atmel AT91SAM7X256

By: Redhatter (VK4FSJL)

Redhatter (VK4FSJL) — Mon, 18 Aug 2008 22:08:13 +0000

Well, the patch is linked there right on that post. The link is here: http://dev.gentoo.org/~redhatter/misc/atmel-cdc-usb.diff.bz2

The patch is compressed using bzip2, and is just applied to the kernel sources by typing:
$ bzcat atmel-cdc-usb.diff.bz2 | patch -p1

All it does is add the device ID of Atmel’s SAM-BA firmware to the device driver, so that the ACM CDC driver takes charge.

By: Henning

Henning — Mon, 18 Aug 2008 16:22:53 +0000

i am currently working on some similar stuff.
Can you tell me sth. more about the “Kernel Patch” for CDC ? I need to send some Data from a Sam7S256 to Linux - and i can’t! The Board connects to my system like:

8230.703782] usb 3-1: new full speed USB device using uhci_hcd and address 18
[ 8230.916402] usb 3-1: configuration #1 chosen from 1 choice

and lsusb:

Bus 003 Device 018: ID 03eb:6125 Atmel Corp.

But that’s it! No way to communicate it seems. Cutecom and so on do not allow anything…
I would be very happy if you have some idea for me.

Regards,

Henning

By: Rolf Segger

Rolf Segger — Sun, 27 Apr 2008 14:43:47 +0000

Thanks for the interesting report.
The reason why SAMBA does not do the trick is that one of the config-bits need to be changed on a SAM7X device.
Otherwise, your program is in flash, but it is not started (the SAMBA bootloader is started).

It seems that in your current setup, you have to use your desktop PC with Windows 2000. In this case,
you could also use the GDBServer which comes with SAM-ICE
(and is available in the J-Link Software pack, free of charge for SAM-ICE with ATMEL devices. http://www.segger.com/download_jlink.html)

It would run on the Windows machine (or a VM) and you communicate via TCP/IP (SMB not required).
A Linux version of the J-Link GDB Server is somewhere in the makes, but does not have high prio.

More advanced features (optional) of the GDBServer are:
- Download directly into flash (no need to use an external tool)
- Unlimited number of breakpoints in flash

You would need a license for it.
We do provide free (trial) licenses;
an inexpensive non-comercial license is available. (http://www.segger.com/jlink_ncu.html)
If you contact me, I will gladly provide a free license since I would like to get your feedback.

Best regards,
Rolf Segger