In SX Microcontrollers, SX/B Compiler and SX-Key Tool, oliverb wrote:

Hi Alex,
I have a couple of questions. First, do you have any other USB to serial devices installed that may use the FTDI chip? Second, which FTDI drivers are you using. The drivers from the Parallax web site or the drivers from the FTDI web site. And finally, have you updated the FTDI drivers recently and if so did you uninstall the old drivers by using the FTDI uninstall program on their web site. If you have uninstalled and reinstalled a different USB driver for FTDI devices in the past year, you download the FTClean program and run it. It requires that you unplug all FTDI USB devices before running it. Then plug a device in and let the driver download automatically. There are some very serious issues with FTDI drivers right now. And let explain one of the problems. You install the FTDI drivers from the Parallax web site and things work fine for a few days. Then you have a problem and unplug the device while your connected to the Internet. When you plug the device in again, the driver updates automatically and you may not even know it. FTDI released new drivers about a month ago and I had a similar problem. When I started checking through the device manager I noticed the driver updated automatically when I plugged the device in and caused all kinds of problems. If your uncertain, unplug the device, uninstall the driver, download and run the FTClean program from the FTDI web site and then install the drivers from the Parallax site once more. Things may just start working properly. Just a suggestion.

Regards,
Oliver

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