I wrote a article about this: hier klicken
For sure, the aTeVaL-Board is compatible with Bascom. It uses the libUSB-driver and avrdude vor this. Make sure, that the board is in avrdude-mode (blinks 4 times at startup click here for the description how to change modes).
You can find the configuration for Bascom here in this article.
There are a lot of examples on the project-homepage itself: click here