-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jan Engelhardt schrieb: > On May 24 2007 12:45, Lars K.W. Gohlke wrote: > >> Date: Thu, 24 May 2007 12:45:06 +0200 >> From: Lars K.W. Gohlke >> To: Jan Engelhardt >> Cc: Tilman Schmidt , linux-kernel@vger.kernel.org >> Subject: Re: How to access correctly serial port inside module? >> >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> Jan Engelhardt schrieb: >>> On May 24 2007 12:22, Lars K.W. Gohlke wrote: >>>> ok, I have read everything and also have read the chapters about >>>> tty_drivers. However I'm not really understand, how to ... . >>>> >>>> I will summarize the concrete scenario, which will lead to the >>>> understanding and further solution of deadling with serial driver. >>>> >>>> [scenario] >>>> >>>> 1. in userspace I'm doing: > date > /dev/ttyS0 >>>> 2. in kernelspace I want to print out this date. >>>> >>>> [/scenario] >>>> >>>> I'm really new to kernel coding, that's why I maybe understand some >>>> functions not the proper way. >>>> >>>> I'm a bit confused. >>> So am I. Usually, you connect two different machines with a serial cable. >>> (Leaving out the special case of connecting ttyS0-ttyS1 on the same >>> machine.) >>> >>> This poses the first question: whose kernelspace? the sender or >>> the receiver side? And by "this date" do you perhaps mean >>> "whatever was sent", or specifically a date? And print to _where_? >>> >>> Up to now, it looks like you want to do "cat >> >>> >>> Jan >> date is an example >> >> and you got it, I want to do "cat > -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.3 (MingW32) - GPGrelay v0.959 >> >> iD8DBQFGVWy0AAomYJ1taN8RAu7/AJ9+1irJURFy5KFy/wzHqSXXD5sRgACfSi49 >> ec5AnOQoTz2nCt//siaiTNs= >> =uj4G >> -----END PGP SIGNATURE----- >> > > Jan for example I want to print out it with printk(). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (MingW32) - GPGrelay v0.959 iD8DBQFGVXUBAAomYJ1taN8RAix3AJ0Q8GTuMg2eJsFbD/fdQFN8SnmoqgCgrHDO gTj9ygAshefP33OY7a3MGyk= =Mt6g -----END PGP SIGNATURE-----