USB -> RS485 adapter

Anybody tried to use a USB -> RS485 adapter on a FriendlyARM?

I need a RS485 interface on my FriendlyARM, and so far I think the easiest
solution would be to use an inexpensive USB->RS485 adapter.

I tried to connect such a converter to my board, and the system recognised
the chip chip used in the converter.

When connected to the system. I got a new device: ttyUSB.
If anybody have experience with such a converter, I would appreciate some
information how to program and use the device?
Eg. will it act as a normal serial port on the system?

Thanks in advance

BR
Steen

hi Steen,
         just use /dev/ttyUSB in the code same as how u use /dev/ttySAC0
in the C program to read and write thru th com ports

thanks
armtry

Thanks a lot armtry.

One short extra question.

Do using the /dev/ttyUSB in the code as how I use /dev/ttySACx also include
various settings like baudrate, number of stopbits etc. ?

BR
Steen

You can pick up very good yet cheap USB to RS485 devices from 
http://www.tronisoft.com/cat_usbtors485.php
See item 2459.

Contains FTDI chipset so supported and installs as a COM port. 

Or try: 

http://www.easysync-ltd.com/category/135/usb-to-rs485-cables.html

But these are a lot more expensive for the same FTDI chipset based devices.

Hope that helps,

Joe