I've managed to get it all working, if anyone has issues with this particular setup, feel free to contact me. Bas <div class="gmail_quote">On Tue, Feb 22, 2011 at 1:23 AM, Bas Jacobs <<a href="mailto:basfriends@gmail.com">basfriends@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div></div><div class="h5"><div class="gmail_quote">Dear List, I've tried to compile and run the usb-device-cdc-serial-project-at91sam7s-ek. I'm using the codesourcery toolchain and the sam-ba programming tool. The compilation and flash procedures go well. However, there are some problems when I try to connect and communicate with the board. I made some modifications to the source, i added the following piece of code before the last two ifstatements: usbBuffer[0] = 0x01234567; usbBuffer[1] = 0x09876543; CDCDSerialDriver_Write(usbBuffer, DATABUFFERSIZE, 0, 0); I disabled the cdc_acm driver (blacklist and rmmod). I am: uname -a Linux USSR 2.6.37-02063701-generic #201102181135 SMP Fri Feb 18 12:47:22 UTC 2011 i686 GNU/Linux (I use the 37 kernel because of the sam-ba driver). dmesg says the following: [ 5845.748085] usb 6-1: new full speed USB device using uhci_hcd and address 25 lsusb says the following: Bus 008 Device 002: ID 0a5c:2101 Broadcom Corp. Bluetooth Controller Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 023: ID 03eb:6119 Atmel Corp. <-- This is the at91sam7s256 Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 003: ID 046d:c05d Logitech, Inc. Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 04e8:5041 Samsung Electronics Co., Ltd Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 0ac8:c326 Z-Star Microelectronics Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub cat /dev/bus/usb/006/025 | hd says the following: 00000000 12 01 00 02 02 00 00 08 eb 03 19 61 00 01 00 01 |...........a....| 00000010 00 01 09 02 43 00 02 01 00 c0 32 09 04 00 00 01 |....C.....2.....| 00000020 02 02 00 00 05 24 00 10 01 05 24 01 01 00 04 24 |.....$....$....$| 00000030 02 02 05 24 06 00 01 07 05 83 03 40 00 0a 09 04 |...$.......@....| 00000040 01 00 02 0a 00 00 00 07 05 01 02 40 00 00 07 05 |...........@....| 00000050 82 02 40 00 00 |..@..| 00000055 I would like to be able to set up some communication with the board, but I'm a bit out of clues. Google isn't very helpful either. Any links to working tutorials or own experiences are most welcome. Also, of course, if you've troubles setting up the toolchain: let me know. I'm also not entirely sure whether this list is the correct place for my question. Best regards, Bas Jacobs </div> </div></div></blockquote></div>