PORTS Forum

Ports and Interfaces => USB => Topic started by: grodknight on October 09, 2017, 10:07:30 pm

Title: FTDI - Modifying Windows Driver (FT234XD)
Post by: grodknight on October 09, 2017, 10:07:30 pm

Hi,

We are trying to modify our Windows Driver to support the FTDI IC. Our driver does not use VCP and works directly with several micro-controllers. Are there any code examples for updating our driver to setup and communicate with the IC? It seems we can do control functions, but not move data. We don't have a baud rate problem. I have almost all FTDI docs including AN115 (API).

Thanks in advance.

Title: Re: FTDI - Modifying Windows Driver (FT234XD)
Post by: Jan Axelson on October 10, 2017, 10:19:02 am

If FTDI doesn't provide the low-level documentation you need, you might have to reverse engineer the driver using a protocol analyzer to view communications using the FTDI driver.

Or look for clues in open source drivers such as

https://www.intra2net.com/en/developer/libftdi/

https://github.com/torvalds/linux/blob/master/drivers/usb/serial/ftdi_sio.c