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Author Topic: Cannot find FT4222 chip on Windows  (Read 1399 times)

petewall

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Cannot find FT4222 chip on Windows
« on: May 07, 2018, 08:32:49 PM »

I'm still working on debugging my other issue (http://www.ftdicommunity.com/index.php?topic=83.0).  While I was able to detect the FT4222 chip on my Mac OS X machine, when I built the software on Windows 10, I cannot see it.

To reduce any issues with my code, I'm using the i2c_master example.  In the code, after the call to:
Code: [Select]
FT_STATUS status = FT_CreateDeviceInfoList(&numOfDevices);
numOfDevices is always 0.

However, when I look at the Windows Device Manager, I do see a "FT4222H Mode 3 Device" entry in the "Universal Serial Bus controllers" section.

I installed the D2xx drivers (http://www.ftdichip.com/Drivers/D2XX.htm) using the Windows setup executable. Can you help me detect this device in my code?
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FTDI Community

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Re: Cannot find FT4222 chip on Windows
« Reply #1 on: May 08, 2018, 11:32:16 AM »

Hello,

There should be no problems running the example code provided with the library.

Does the same thing happen on a different Windows PC?

Please ensure that you are using the latest version LibFT4222 Windows Library (v1.4.1) and Examples.

Mode 3 is the correct mode for using the device as 1 port for data stream (I2C or SPI) as per Table 5.1 in the FT4222H Datasheet.

You could try completely uninstalling and reinstalling the FTDI drivers. See FTDI_Driver_Uninstall_with_2-12-28_Install.pdf for details on how to do this.

Best Regards,
FTDI Community
« Last Edit: September 13, 2019, 03:20:04 PM by FTDI Community »
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