Hello,

binary image must be encrypted in RC4 format with 40 bit key before 
making DFU file.

Gediminas

Hi!


I tried to build my own firmware for the microcontroller with GNU 
Toolchain.
I was able to build, but it doesn't work.
Sadly I'm not able to debug.


Maybe someone has an idea?


CAUTION: You can brick your hardware, if you accidentally overwrite 
the bootloader!

If you work careful you can easily flash back to original firmware.



Setup project and build project:
1. Download GNU Toolchain for ARM 
(https://launchpad.net/gcc-arm-embedded)
2. Unpack into /opt
3. Set Path: "export PATH=/opt/gcc-arm-none-eabi-4_8-2013q4/bin/:$PATH"
4. Unpack gccstartup.tar.gz
5. execute "make"


Convert bin file to dfu file:
1. Download dfu-20101118.tgz from 
http://www.seeedstudio.com/forum/viewtopic.php?p=4504#p4504
2. Unpack wherever you want
3. execute "python dfu.py -b 0x20006000:main.bin main.dfu"


Flash to device:
https://github.com/krumboeck/usb2can_firmware#flash-the-device-linux-experimental 



What it should do (but does not work):
* Simple startup for C language
* Turn on the red led


Attached files:
gccstartup.tar.gz   --- Project source
main.bin            --- Binary output for flashing
main.map            --- Linker Mapping file


Some last thoughts:
* The memory map from Gediminas contains a .checksum section. Maybe 
the bootloader do some checks?
* Maybe the binary file is ok, but the dfu file is not compatible?



regards,
Bernd



Am 2014-01-25 17:55, schrieb Oliver Hartkopp:

quoted

Hello Brennan,

a packet from Germany to the US is about 16 EUR with DHL and 60EUR 
with UPS??
Maybe I missed anything with the UPS Website while trying to get some 
shipping
costs %-]

Btw. with all the customs stuff it looks pretty pointless to sent 
this adapter
to you from Germany and back again :-(

I know some guys in the US that bought some of these adapters last year.
I'll try to contact them on Monday if it's possible to lend you one 
of the
adapters and ship it inside the US.

Regards,
Oliver

On 25.01.2014 16:55, Brennan Ashton wrote:

quoted

Bernd,
Assuming it's not coming from the Arctic Circle or something I have no
problem covering the cost of shipping. Just shoot me a private email
with how much shipping is and how to get the funds to you.

--Brennan

On 1/25/14, Bernd Krumboeck [off-list ref] wrote:

quoted

I could lend, but the delivery costs would eat my pocket. ;-)

Maybe I could find some time in the next days.
Are you willing to assist by mail?


regards,
Bernd



Am 2014-01-25 09:29, schrieb Brennan Ashton:

quoted

If there is interest and someone can lend me one of these for a 
bit of
time I'm sure I could get this ported over to the GCC arm tool chain.
I have done a few IAR to GCC ports and besides a few tricks they
usually are not too bad.

--Brennan Ashton

On 1/24/14, Bernd Krumboeck [off-list ref] wrote:

quoted

Hi!


Source code from firmware v1.5:
https://github.com/krumboeck/usb2can_firmware


After some experiments I was able to flash the firmware with 
dfu-util
under
linux:
https://github.com/krumboeck/usb2can_firmware#flash-the-device-linux-experimental 



Sadly I don't know the way how to build the firmware with a free 
tools
chain.


regards,
Bernd


Am 2014-01-22 15:46, schrieb Marc Kleine-Budde:

quoted

On 01/22/2014 01:58 PM, Bernd Krumboeck wrote:

quoted

May I kindly ask you to send me a diff/patch about the changes, 
so I
can
update the firmware sources on github.

A complete new set of sources will do, too. Git will create the 
diff
for
you. :)

Marc