Thank you for your kind reply!
I will try to figure out how to make it work by the help of the document "AN_151 Vinculum II User Guide" mentioned previously.

Anyway, I appreciate your kind reply a lot.
Thank you so mcuh!

Yvonne

Hello,

We assume this is an SPI Master application.
We have already tested this on SPI Flash and it works fine.
Maybe you are encountering some hardware or wiring trouble?
Please make sure the SPI wiring is as short as possible if you want a higher frequency.
Probing the wiring may also cause signal delay so it is not recommended.

Best Regards,
FTDI Community

Hello,

VNC2 may not support all USB HID class devices.

"USBHostHID" and "USBHostHID2" are only examples.
Refer to the ReadMe.txt inside the example folder.

You can refer to AN_151 Vinculum II User Guide for all API usage which may help you implement your own solution to host an NFC reader.

There may be other FTDI Community users who can help you further.

Best Regards,
FTDI Community

Hello,

I am inquiring because there is something wrong with SPI communication using FT4222H.

It works fine at 20Mhz, but if you increase the frequency above, the read data seems to shift by 1 bit.

First, the operation status at 20Mhz.(Sysclk = 80Mhz, DIV = 4)
When I send a command, it responds with 0x2016. Normal operation.
Both the signal waveform and read data are normal.

But it's different at 24Mhz.(Sysclk = 48, DIV = 2)
When I send a command, it responds with 0x100B.
If you look at the signal waveform, it seems to be 0x2016, but in the read data, it reads 0x100B.

I found 0x2016 to be 0x100B if I shift 1 bit right.

I need advice on this phenomenon. Please help me.
Attach the waveform and read data screenshot.

Hello,

Thank you so much for the kind assistance in the past time thankfully!

I recently want to do the RFID of NFC reader function based on the V2DIP1-32 module which uses the VNC2-32Q IC as being the USB host. I had modified the example codes based on "USBHostHID" and "USBHostHID2" to read data from the HID device of barcode readers successfully. However, when I replace the HID device into the USB RFID reader, it does not work to read ID information from the card scaned by RFID reader. I use the debugger to trace my code, it shows the error code message "USBHOST_NOT_FOUND" when doing function "vos_dev_read".

I wondering that does the VNC2-32Q IC support for all types of HID devices? Or any suggestions for implementing RFID readers with VNC2 USB host are appreciated in advanced!

Thank you so much!
Yvonne

Hello,

Thank you so much for your kind reply and information.

I modified the example codes based on folders "USBHostHID" and "USBHostHID2" from the path you provided to do my project.

Thank you so much!
Yvonne

Hello,

This has now been released to the website:

https://ftdichip.com/firmware/vnc2-tools/

Best Regards,
FTDI Community

I'm having a very similar problem right now.

1. I plug FT602 to the USB port and start the FT602 Programming Utility
2. Only "read configuration" and "read from file" buttons are clickable
3. When I click "read configuration", I get a message "auxiliary interface is not present, please enable it"
4. I click to enable the auxiliary interface and all buttons become grey, unclickable

I cannot configure the FT602 chip anymore.

Hello,

There are a few products which you can consider as a USB to I2C master.

The I2C master devices that we have are as follows.
All will require some form of application code running on the OS to control the device:

Using MPSSE and d2xx:
FT232H
See AN_135 MPSSE Basics. Also MPSSE software examples exist.
UM232H is available for test, evaluation and reference.

Using LibFT4222 and d2xx:
FT4222H
Software examples are provided with the library download.
UMFT4222EV-D is available for test, evaluation and reference.

HID class device
FT260
LibFT260 can be used with Windows, software examples are provided with the LibFT260 library download.
UMFT260EV1A is available for test, evaluation and reference.

Schematics are provided in the modules linked above.

Note that the FT602 is not an appropriate product. This is a UVC video class device with built-in I2C master interface for video device configuration, not for general I2C master usage. It's likely the FT602 is overkill if you are just looking for an USB to I2C master bridge.

Best Regards,
FTDI Community

Hi Kiran,

Please see Command Processor For MPSSE and MCU Host Bus Emulation Modes.

Best Regards

FTDI Community