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 on: October 12, 2021, 07:17:04 AM 
Started by HI_type - Last Post by HI_type

After finding the FT260 not suitable to our purpose due to inherent limitations of HDI (https://www.ftdicommunity.com/index.php?topic=705.0), we jumped on the FT4222H but see similar issues again:

- Requesting a 2 MBit clock, the chip sents the address byte at a meager 40 kBit. [-> "16 Bytes Write 2000 kbps (addr measurement).png"]

- There is still a pause in the range of a byte time and more. [-> "16 Bytes Write 2000 kbps (payload gap measurement).png"]

- At 800kBit, the clock starts out correctly and even has the first 2 bytes abutted, but then shows a sending pattern with gaps. [-> "16 Bytes Write 800 kbps (payload gap measurement)(2).png"]

Can FTDI or someone else propose an approach which does not show the above issues?
We are limited by maximum clock speed but need to reach a minimum data throughput. The gaps, more or less, half effective throughput, the clock timing issue in the first byte on the 2 MBit packet defeats the purpose of using a higher clock rate.

- UMFT4222EV-D board with pull-ups only (no slave connected).
- LibFT4222 on top of the D2XX driver.
- Repeated start send routine.
- We tested setting the FT4222_SetClock (ftHandle, clock) to SYS_CLK_24 and every other option. SYS_CLK_60 worked best (Which i believe was stated as the default).
- OS: Windows 10; Programming language: Delphi.
- The test software is virtually identical to the pseudo-code shown in the FT260 post linked above, simply replaced the calls to the new library.

As we assume the hardware is more than capable of sending an infinite stream of bytes abutted, I post this in the software section of the forum. If someone knows for a fact that this assumption is wrong, let us know.

 on: October 06, 2021, 03:18:16 PM 
Started by Oxthorp - Last Post by FTDI Community

Sorry, the only way to change the camera resolution is through the FT602 configuration programmer utility.

Best regards

FTDI Community

 on: October 06, 2021, 02:00:07 PM 
Started by Oxthorp - Last Post by FTDI Community Admin
Welcome to the Community.

We will be very interested to hear further details of your FTDI IC projects.

best regards

FTDI Community

 on: October 06, 2021, 12:22:15 PM 
Started by Oxthorp - Last Post by Oxthorp
Hi everyone !

I'm currently developing a software to acquire a video stream from a FT602.
I use the Microsoft Media Foundation API to acquire the video data.

The purpose of my software is to acquire image data from different video sources and so different resolution. I understand that it is possible to add / remove / change the video resolution using the FT602 Configuration Programmer software (cf. Attached image). But, is it possible to change the resolution using a function available on the ft602 or D3XX DLL?

Thanks in advance.

 on: October 06, 2021, 12:14:32 PM 
Started by Oxthorp - Last Post by Oxthorp
Hello Everyone,

I'm Kevin, I work for an electronic company that develops boards for thermal sensor. I sometimes use FTDI chip to communicate with our boards and my most recent project requires to use a FT602 to provide a video stream to a computer.

I am looking forward to discussions!


 on: October 05, 2021, 04:44:38 PM 
Started by FTDIUser1 - Last Post by FTDI Community
Link below is for our application note AN_184 - FTDI Device Input Output Pin States.  Page 38 details the FT260 part. 

FTDI Community

 on: October 05, 2021, 01:32:46 AM 
Started by FTDIUser1 - Last Post by FTDIUser1

According to datasheet, DCNF0 pin should be set to high and DCNF1 set to low in order to enable UART communication. Is there any other configuration I should consider to allow the IC to act as TTL-232R cable converter?

Thank you,

 on: October 04, 2021, 04:46:20 PM 
Started by FTDIUser1 - Last Post by FTDI Community
Yes, both parts can be used as USB to RS232/RS422/RS485 Converters

FTDI Community

 on: September 30, 2021, 07:35:48 PM 
Started by FTDIUser1 - Last Post by FTDIUser1
Hello everyone,

I am working on a project that need an FT232r cable to convert UART to USB. The cable work fine but we are planning to use an IC on the board instead. Unfortunately, FT232 ICs are out of stock everywhere.

Is it possible to use FT260 instead ? we don't need a specific application. Only convert UART to USB.

Thank you,

 on: September 29, 2021, 12:53:24 PM 
Started by Siddharth Mishra - Last Post by FTDI Community

The SCK line should normally be a push-pull output on this device (unless your code switches the pin to input mode at any time)

What I/O voltage does your MCU use? Is it a 3v3 I/O

We would recommend to check with a scope or logic analyser with analog capability to see what the waveforms are doing,

Best Regards, FTDI Community

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