How to install firmware in CUL busware devices

Download the ‘culfw’ current version from :


Current version I found is 1.66.

Go to ‘culfw-1.66/Devices/CUL/’ directory and run the following command in the terminal.

sudo make usbprogram_v3

The cul device now should start blinking.

Test your device by running an application.

Another option

Install the package dfu-programmer,

sudo apt-get install dfu-programmer

sudo apt-get install build-essential

then execute “make usbprogram”

make usbprogram_v3

After flashing the CUL, a new USB device should appear: “03eb:204b Atmel Corp.”. If not reinsert the device without pressing the micro-switch.


There are other options which you can find in this link:


It’s in German, but with translation works fine for this.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s