I'm using an SPI host adapter for a project. The Aardvark from TotalPhase. And I did something crazy, I read that EULA license that everyone just clicks through.The driver installation license includes these bits:This driver installer package also includes a WIN32 driver that is  entirely based on the libusb-win32 project (release 0.1.10.1)....LICENSE:The software in this package is distributed under the following  licenses:Driver:   GNU General Public License (GPL) Library, Test  Files:    GNU Lesser General Public License (LGPL)Now, my understanding of of the GPL is that it's sticky and viral. If you include software then the whole project has to be released under the GPL (if you distribute it, you can do whatever you want with in-house projects).If the driver was like the library, and was licensed under the LGPL, it could be used by my closed source proprietary project, as long as it's source and license was passed along with it. But it's not, it's pure GPL. If I include this driver in my project and distribute it, am I required to release my project under the GPL? 
TotalPhase Aardvark driver's GPL license
licensing;gpl;drivers
You can distribute the driver, yes. But you are required to provide the source code, or point to where end-users can get it, including any changes you make to the driver. The driver's license does not affect the rest of your project.The library can also be used in your project, provided that you also provide source code for it or point to where users can get it, including any changes you've made. You can also link the library to your project, provided that it's possible for an end-user to replace the library with one they've built. Most projects meet this requirement by dynamically linking the library as a DLL or shared object.This does not affect the license under which you distribute your own software, provided you meet the other requirements.As always, however, you should consult your attorney.