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How to read com port over com10?
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rolance
Aug 23, 2011, 2:22:21 AM8/23/11
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Dear All
I need read data form some other hardware!
set com [open com1: r+] for port 1~9 is ok for use!
But some computer the hardware over com10,11,12 ---> can't access
those port!
Could some one give me some direction to solve this problem!
BR
Rolance
Yaroslav Schekin
Aug 23, 2011, 2:56:45 AM8/23/11
to
Hi.
> Dear All
>
> I need read data form some other hardware!
>
> set com [open com1: r+] for port 1~9 is ok for use!
>
> But some computer the hardware over com10,11,12 ---> can't access
> those port!
>
Did you read this?
---------- man open -------------
Windows (all versions)
Valid values for fileName to open a serial port are of the form comX:,
where X is a number, generally from 1 to 4. This notation only works
for serial ports from 1 to 9, if the system happens to have more than
four. An attempt to open a serial port that does not exist or has a
number greater than 9 will fail. An alternate form of opening serial
ports is to use the filename \\.\comX, where X is any number that
corresponds to a serial port; please note that this method is
considerably slower on Windows 95 and Windows 98.
---------- man open -------------
> Dear All
>
> I need read data form some other hardware!
>
> set com [open com1: r+] for port 1~9 is ok for use!
>
> But some computer the hardware over com10,11,12 ---> can't access
> those port!
>
---------- man open -------------
Windows (all versions)
Valid values for fileName to open a serial port are of the form comX:,
where X is a number, generally from 1 to 4. This notation only works
for serial ports from 1 to 9, if the system happens to have more than
four. An attempt to open a serial port that does not exist or has a
number greater than 9 will fail. An alternate form of opening serial
ports is to use the filename \\.\comX, where X is any number that
corresponds to a serial port; please note that this method is
considerably slower on Windows 95 and Windows 98.
---------- man open -------------
WBR, Yaroslav Schekin.
hae
Aug 23, 2011, 3:39:10 AM8/23/11
to
Hello Rolance,
see here http://wiki.tcl.tk/1838 how to list all available ports on
windows from the registry.
Rüdiger
rolance
Aug 23, 2011, 5:37:11 AM8/23/11
to
On 8月23日, 下午3時39分, hae <r_haer...@gmx.de> wrote:
> On 23 Aug., 08:22, rolance <tomstone...@hotmail.com> wrote:
>
> > Dear All
>
> > I need read data form some other hardware!
>
> > set com [open com1: r+] for port 1~9 is ok for use!
>
> > But some computer the hardware over com10,11,12 ---> can't access
> > those port!
>
> > Could some one give me some direction to solve this problem!
>
> > BR
> > Rolance
>
> Hello Rolance,
>
> see herehttp://wiki.tcl.tk/1838how to list all available ports on> On 23 Aug., 08:22, rolance <tomstone...@hotmail.com> wrote:
>
> > Dear All
>
> > I need read data form some other hardware!
>
> > set com [open com1: r+] for port 1~9 is ok for use!
>
> > But some computer the hardware over com10,11,12 ---> can't access
> > those port!
>
> > Could some one give me some direction to solve this problem!
>
> > BR
> > Rolance
>
> Hello Rolance,
>
> windows from the registry.
>
> Rüdiger
Dear All
I already try this command
[open \\\\.\\com13 r+]
error message:
couldn't open "\\.\com13": permission denied
did I forget some thing?
BR
Rolance
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