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Discussion - Drivers / FT4222H and Windows driver 2021
« 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?
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?