[ntp:questions] Re: Serial Ports

Ramanathan Palaniappan ram at cs.wisc.edu
Sun Apr 17 02:59:12 UTC 2005


Hi,
  If it does not emulate a serial port, then how will I make ntpd
communicate with the device..?

Thanks,
Ramanathan

On Fri, 15 Apr 2005, Richard B. Gilbert wrote:

> Ramanathan Palaniappan wrote:
>
> >Hi,
> >    I am having a problem trying to interface ntpd with a Truetime
> >GPS(560-5900) PCI card. The PnP BIOS automatically configures the I/O port and
> >IRQ for the PCI card at 0xd000 and 10 respectively during bootup.
> >
> >I tried setting up a logical device /dev/ttyS2 with port 0xd000 and IRQ 10
> >using the "setserial" command. ( ttyS0 and ttyS1 were both configured by the h/w
> >at 0x3f8 and 0x2f8). Then, I rebooted the system to let the changes take place.
> >I also created a symbolic link /dev/true0 to point to /dev/ttyS2.
> >
> >The changes were reflected in the /proc/tty/driver/serial file but still I
> >am unable to communicate with the device.  Can anyone help me ?
> >
> >Thanks,
> >Ramanathan Palaniappan
> >Graduate Student
> >Computer Sciences Department
> >University of Wisconsin-Madison
> >
> >
> Have you tried obtaining and reading the documentation for your card?
>
> http://www.symmetricom.com/media/pdf/documents/ds-bc635-637pci.pdf
>
> A quick look at the above suggests that you need special drivers for the
> card and it does not mention any sort of serial port emulation!!!
>
> If you can't make it work, I would be delighted to have it!!!!!!!!!
>
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