[haiku-development] Re: Device file for COM1?
- From: Stephan Assmus <superstippi@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Tue, 15 Dec 2009 09:18:36 +0100
On 2009-12-15 at 07:56:22 [+0100], Michael Crawford <mdcrawford@xxxxxxxxx>
wrote:
> I'm trying to enable serial debug output, but I'm not having much luck.
>
> I'm not completely sure that my cables are set up correctly. What I'd
> like to do to help diagnose this is send some data out my serial port
> from Haiku, while I'm booted into the desktop.
>
> I looked around the /dev directory for the serial device file. There is
> /dev/pt and /dev/tt, but my impression is that those devices are for
> pseudo-ttys for use by Terminal. I need the device for the physical
> serial port. I googled around and searched the list archives, but I
> couldn't find it anywhere - that would be a good thing to document on the
> Haiku website.
>
> I looked at the Haiku source code. If I'm reading it correctly, I should
> have a /dev/ports/pc_serial directory - but I don't.
>
> My Haiku box has an Intel Desktop Motherboard, which has an internal
> header for serial but no external connector. Today I bought what I hope
> is the correct cable, to bring the signal from the header out to a DB9
> connector. The cable was labeled IDC 10/DB9 Male. Is that the right
> cable? It was the only cable that Frys had that looked like it had the
> right kinds of connectors on it.
The problem is that the pc_serial driver works only on BeOS. On Haiku, the
TTY layer has changed and the driver needs to be adapted.
Best regards,
-Stephan
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