RS232 Problem "TRCSr" <trcmail[ at ]intrstar.net> 10/24/2008 8:27:18 PM I have a program that communicates with an instrument via the RS232 interface. The program worked fine with the equipment, and a simulator that I built for test on another WIN98 computer. However, with the new WinXP computer there is no receiving of data from the port. If I go into the Device Manager and disable and then re-enable the port, everything seems to work fine. Any ideas as to why this is happening? My customer has a recent WinXP computer that runs an earlier version of the program, but not the latest versions, giving my "communications failure" response when it tries to receive data. Thanks for any insite into what is happening. I can give more info if necessary. The ports are running at 9600 baud for one program and 19600 baud for another. It occurs whether I use Com1 or Com2. TRCSr

Re: RS232 Problem "JS" <[ at ]> 10/25/2008 12:31:14 AM Have you tried changing the IRQ number (if possible). Alternative might be a PCI Serial Port card. JS http://www.pagestart.com "TRCSr" <trcmail[ at ]intrstar.net> wrote in message news:uF%23EobhNJHA.3480[ at ]TK2MSFTNGP05.phx.gbl... [Quoted Text] >I have a program that communicates with an instrument via the RS232 >interface. The program worked fine with the equipment, and a simulator that >I built for test on another WIN98 computer. However, with the new WinXP >computer there is no receiving of data from the port. If I go into the >Device Manager and disable and then re-enable the port, everything seems to >work fine. Any ideas as to why this is happening? My customer has a recent >WinXP computer that runs an earlier version of the program, but not the >latest versions, giving my "communications failure" response when it tries >to receive data. > > Thanks for any insite into what is happening. I can give more info if > necessary. The ports are running at 9600 baud for one program and 19600 > baud for another. It occurs whether I use Com1 or Com2. > > TRCSr > >

Re: RS232 Problem "Ian D" <taurus[ at ]nowhere.com> 10/25/2008 12:43:59 AM "TRCSr" <trcmail[ at ]intrstar.net> wrote in message news:uF%23EobhNJHA.3480[ at ]TK2MSFTNGP05.phx.gbl... [Quoted Text] >I have a program that communicates with an instrument via the RS232 >interface. The program worked fine with the equipment, and a simulator that >I built for test on another WIN98 computer. However, with the new WinXP >computer there is no receiving of data from the port. If I go into the >Device Manager and disable and then re-enable the port, everything seems to >work fine. Any ideas as to why this is happening? My customer has a recent >WinXP computer that runs an earlier version of the program, but not the >latest versions, giving my "communications failure" response when it tries >to receive data. > > Thanks for any insite into what is happening. I can give more info if > necessary. The ports are running at 9600 baud for one program and 19600 > baud for another. It occurs whether I use Com1 or Com2. > > TRCSr > > XP does not allow software to directly access I/O ports. For XP you need a device driver that communicates with the port. You will need an XP compatible version of the software.

Re: RS232 Problem "Twayne" <nobody[ at ]devnull.spamcop.net> 10/26/2008 2:04:10 PM [Quoted Text] > I have a program that communicates with an instrument via the RS232 > interface. The program worked fine with the equipment, and a > simulator that I built for test on another WIN98 computer. However, > with the new WinXP computer there is no receiving of data from the > port. If I go into the Device Manager and disable and then re-enable > the port, everything seems to work fine. Any ideas as to why this is > happening? My customer has a recent WinXP computer that runs an > earlier version of the program, but not the latest versions, giving > my "communications failure" response when it tries to receive data. > > Thanks for any insite into what is happening. I can give more info if > necessary. The ports are running at 9600 baud for one program and > 19600 baud for another. It occurs whether I use Com1 or Com2. > > TRCSr Have you tried setting win98 compatability mode for it? That may well get it to work for you. XP by default won't allow the method your'e trying to use. It's part of the security of the program. HTH