FTDI Community

General Category => General Discussion => Topic started by: vikash23 on October 15, 2020, 08:33:40 PM

Title: 1 USB to 3 UART using FT4232H
Post by: vikash23 on October 15, 2020, 08:33:40 PM

Hi,



Please see the attached image.



I have three devices with only UART in all three devices



I need to communicate with all three devices at the same time or one after the other using one USB



I have see USB to UART using FTDI converter . But that is for one to one.



Here one USB to 3 UART I needs to be connect. Is it possible using FT4232H?



I saw one FTDI device FT4232H and the datasheet says "Single chip USB to four channels UART (RS232, RS422 or RS485) or Bit-Bang interfaces. "



can I use this device for my application ?

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Title: Re: 1 USB to 3 UART using FT4232H
Post by: FTDI Community on October 16, 2020, 12:17:51 PM

Hello,

Yes the FT4232H can be utilised to provide up to 4 UART connections from a single USB device, each UART connection would present its own COM port to the host machine.

Best Regards,
FTDI Community

Title: Re: 1 USB to 3 UART using FT4232H
Post by: vikash23 on October 30, 2020, 09:36:25 PM

Can I also please know if RXTX0, RXTX1 and RXTX2 devices can also communicated among themselves via FT4232H as bridge ?

I mean device 0 messages goes through FTDI IC and received by device 1. Also vice versa.

Thanks

Title: Re: 1 USB to 3 UART using FT4232H
Post by: FTDI Community on November 02, 2020, 02:07:45 PM

Hello,

Unfortunately it is not possible to bridge UART connections through the IC between devices.

Best Regards,
FTDI Community

Title: Re: 1 USB to 3 UART using FT4232H
Post by: vikash23 on March 03, 2021, 08:53:15 PM

Hi,

Thanks for your response.

If the UART bridge is not possible, can I please know the best method to communicate between device 0 and device 1 ?

Any PC self developed application can receive the data from both devices via FTDI and do a bypass on the PC application ?

Regards,
Vikash

Title: Re: 1 USB to 3 UART using FT4232H
Post by: FTDI Community on March 05, 2021, 02:52:04 PM

Hello,

I would suggest the simplest solution is to connect the UART channels of device 0 and device 1 together if you just require a simple UART bridge.

Assuming however, that you also require a USB connection to these devices, utilising the FT4232H you would be required to write a software application that echos data back and forth between the desired COM ports/interfaces on the FT4232H. You could achieve this using standard COM port programming techniques, or via our D2XX DLL.

Best Regards,
FTDI Community