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I have an Atlys board http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,400,836&Prod=ATLYS with Spartan6 FPGA on it.

I want to setup serial port communications with host PC via onboard USB-UART bridge by EXAR. Everything's ok when running Ubuntu with picocom terminal on the PC but something goes wrong when trying to setup communications with Putty terminal on Windows machine.

The serial terminal is configured in the next way: speed 9600, data bits: 8, parity: none.

What can be wrong there?

dsolimano
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Andrey Pesoshin
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1 Answers1

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Since you have had success with Ubuntu on the same PC, you have shown that the hardware is ok. With the same settings and a compatible program you should have no problem.

  • Have you tried using any other programs (such as HyperTerminal)?
  • Have you confirmed that the serial port works in Windows? do you have other devices you could test with?

More detail needed otherwise.

Josh
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  • I think the same (that there is nothing related to hardware). I've also tried connecting with Advanced Serial Terminal (HyperTerm is not installed by default in win7) - result is the same. – Andrey Pesoshin May 26 '11 at 21:28
  • I have also Spartan 3A starter kit board with normal DCE serial port on it, putty works properly with it. I think the issue is related to XR21V1410 part's (Exar USB-UART bridge) drivers in Windows. I just hope that someone else faced the same problem and solved it. – Andrey Pesoshin May 26 '11 at 21:34
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    Argh! Solved! It was related to usb hub that i'm using with my laptop. Very strange, but some ports are working properly with usb-uart bridge and some don't. And only on Windows – Andrey Pesoshin May 27 '11 at 09:18