Re: serial port communuication

On Feb 15, 2:00 pm, "hari" <haricib...@xxxxxxxxx> wrote:
On Feb 15, 12:21 pm, Fenster <fens...@xxxxxxxxxxxxx> wrote:





In message <OmuisKHUHHA.4...@xxxxxxxxxxxxxxxxxxxx>, Ian Semmel
<any...@xxxxxxxxxxxxxxxxx> writes

Are you using SetCommState on the port ?

If so, are you first doing a GetCommState ? This sets up the DCB
structure to valid values

"hari" <haricib...@xxxxxxxxx> wrote in message
news:1171455246.402743.203120@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi all,

I m communicating to a printer device through serial port.It
is failing to open the port,but when I disable and enable the com port
in device manager,it works fine(i.e)it communicates with the printer
and reads the configuration settings of the printer).

Regards
Hari

I would be wary of using/trusting GetCommState(), lots of people seem to
have problems with this function, see other threads/newsgroups.

--
Fenster- Hide quoted text -

- Show quoted text -

After CreateFile , the API's are failing,
(setcommstate,getcommstate,SetCommTimeouts).On giving
Getlasterror(),it gives error code 1 .(Incorrect function).but after
disabling and enabling com port in Device manager,all the API are
passing. :(

Regards
Hari- Hide quoted text -

- Show quoted text -

Hi all
After CreateFile , the API's are failing,
(setcommstate,getcommstate,SetCommTimeouts).On giving
Getlasterror(),it gives error code 1 .(Incorrect function).but after
disabling and enabling com port in Device manager,all the API are
working:(

.

Relevant Pages

  • Re: serial port communuication
    ... is failing to open the port,but when I disable and enable the com port ... After CreateFile, the API's are failing, ... disabling and enabling com port in Device manager,all the API are ...
    (microsoft.public.vc.mfc)
  • Re: serial port communuication
    ... is failing to open the port,but when I disable and enable the com port ... in device manager,it works fineit communicates with the printer ... After CreateFile, the API's are failing, ... disabling and enabling com port in Device manager,all the API are ...
    (microsoft.public.vc.mfc)
  • Re: device pcic and card
    ... unknown: ... PNP0100: adding irq mask 0x1 ... isa_probe_children: disabling PnP devices ... strange result for test aux port. ...
    (freebsd-current)
  • The reboot doesnt work anymore in today -CURRENT..
    ... Location Bus Device Pin Link IRQs ... port error, restarting port 1 ... unknown: not probed ... isa_probe_children: disabling PnP devices ...
    (freebsd-current)
  • atapci0 controller (was: "Sysinstall: No disks found.)
    ... unknown: ... isa_probe_children: disabling PnP devices ... using extended I/O port range ... Failing probe. ...
    (freebsd-questions)