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General Category => Discussion - Drivers => Topic started by: vogl on June 08, 2021, 02:04:40 PM

Title: FT4222H and Windows driver 2021
Post by: vogl on June 08, 2021, 02:04:40 PM
For abaout five  years we use successfully a FT4222H to implement a  USB-SPI and USB-GPIO bridge in a Windows 10  based system.
The version of the FTDI Windows driver was up to now  1.12.28.0.

Recently some customers did a Windows update and the FTDI driver version changed to 1.12.36.1.
With this version we cannot use the USB-GPIO bridge function.
The library call  „FT_CreateDeviceInfoList()“ recognizes only 1 device (the USB-SPI-bridge).
With the former driver 2 logical devices were recognized.

In the Windows device-manager both logical devices  „FT4222H Interface A“ and „FT4222H Interface B“ are shown regardless of the driver version.

This behaviour can be reproduced with the „gpio_write“-sample in LibFT4222-v1.4.4.

Any hints?
Title: Re: FT4222H and Windows driver 2021
Post by: vogl on June 17, 2021, 05:09:46 PM
With new driver version 2.12.36.2  the USB-GPIO bridge works.