This library is a fork of libftdi.

The design objective of this library is to provide a better out-of-the-box experience for AVRDUDE Windows users.

This library only supports a subset of the original implementation. The intend is not to provide a general purpose implementation, but to satisfy the usage scenarios of AVRDUDE.

This library supports only Microsoft Visual C/C++, as used in the msvc job of the AVRDUDE build action.

The latest version of libftdi for Windows can be found here:
https://github.com/avrdudes/libftdi

The original README of libftdi can be found here: README.

This library was completely rewritten to support the default Windows plug-and-play drivers provided by FTDI (aka D2XX driver), while maintaining a libftdi compatible programming API.

The original libftdi library only supports libusb-compatible drivers, which requires you to swap the official drivers for a libusb-compatible driver using tools such as Zadig. As Windows serial ports and many other tools expect the default FTDI D2XX drivers, you will find yourself swapping drivers back-and-forth when using libftdi with your FTDI devices.