Welcome to the GSM-Forum forums. You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. Only registered members may post questions, contact other members or search our database of over 8 million posts. Registration is fast, simple and absolutely free so please -! I am trying to open my serial port in a Windows Form Application. { MessageBox.Show('Please select a port', 'Port Error'. Please Select Serial Port Sigmakey. Welcome to the GSM-Forum forums. To select the installed editions and Visual Studio versions please select. If you have any problems with the registration process or your account login, please contact. > > > > Problems Unlocking ZTE V768 User Name Remember Me? I originally started developing with the LPC2368 beta unit on a Windows XP machine. All was working fine with the Windows serial port driver. When the new (current) driver was released, I started using that and it wored fine. I then added a Vista machine to my office. I then loaded the new drivers onto the Vista machine and all worked fine. Recently, I received my LPC1768 mbed. I tried it on my Vista machine, and had to re-install the Windows serial port driver but all is working well on it. Now, either board works fine on this machine. I then tried to run the LPC1768 on my XP machine, and again found I had to re-load the Windows Serial Port Driver. When I did, Windows reported that there was a problem and could not start the serial port driver. I tried re-installing it several times, both from the website as well as from a local drive copy. Finally, I went back to my LPC2368 mbed. Re-installed drivers, and everything works fine. Going back to the LPC1768, it fails. It always says the driver could not start. I have uninstalled, re-installed, etc., but to no avail. Again, everything works fine on my Vista machine, just not on my XP machine, and only with the LPC1768 board.the LPC2368 works fine. Any clues as to what might be the issue? Hi Jim, wrote: Recently, I received my LPC1768 mbed. I tried it on my Vista machine, and had to re-install the Windows serial port driver but all is working well on it. Now, either board works fine on this machine. Glad this is working at least. To clarify, this behaviour is expected. Windows registers each different mbed as a separate device, hence the need to install again. Wrote: I then tried to run the LPC1768 on my XP machine, and again found I had to re-load the Windows Serial Port Driver. When I did, Windows reported that there was a problem and could not start the serial port driver. I wonder if this is some hangover from the old driver getting picked up when you put in a new device. However, we tested this all very thoroughly, including re-installing and upgrading, so it feels like a strange interaction/history thing. I'll have a chat with Phil (our USB guru) tomorrow, and see what he recommends. But in the mean time you could look at the following: (Note, I don't have an XP machine with me so can't guide exactly - based on Vista). First off, can you confirm the Firmware on the LPC1768 and LPC2368 mbed's are up to date (see ). Then, if you go to Device Manager, what is the version of the driver at: • Ports (COM & LPT) > mbed Serial Port - right-click Properties, Driver tab • Universal Serial Bus controllers > mbed Composite Device - right-click Properties, Driver tab I'd expect 2.0.2.0 and 1.0.0.0.
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January 2019
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