Installing the Windows USB Driver

On Windows, you use software from Zadig to install drivers. Download the Zadig software (version 2.7 or later) from zadig.akeo.ie. (You do not need to install it; simply run the downloaded executable.)

Important: For some Efinix development boards, Windows automatically installs drivers for some interfaces when you connect the board to your computer. You do not need to install another driver for these interfaces. Refer to the user guide for your development board for specific driver installation requirements.

To install the driver:

  1. Connect the board to your computer with the appropriate cable and power it up.
  2. Run the Zadig software.
    Note: To ensure that the USB driver is persistent across user sessions, run the Zadig software as administrator.
  3. Choose Options > List All Devices.
  4. Repeat the following steps for each interface. The interface names end with (Interface N), where N is the channel number.
    • Select libusb-win32 in the Driver drop-down list.
    • Click Replace Driver.
  5. Close the Zadig software.
Note: This section describes how to install the libusb-win32 driver for each interface separately. If you have previously installed a composite driver or installed using libusbK drivers, you do not need to update or reinstall the driver. They should continue to work correctly.