Re: [Xenomai-help] xenomai beginner problem

[Jan Kiszka <kiszka@domain.hid>]

[-- Attachment #1: Type: text/plain, Size: 1619 bytes --]

Martin Chaplet wrote:
> On 7/11, Jan Kiszka wrote:
> 
> 	Kim Chuan Lim wrote:
> 		I am interested with the hard real time serial port example from..
> 		http://www.captain.at/xenomai-serial-port-example.php
> 
> 		The following is the error message i received when i try to run the
> 		program..
> 		./rt_serial_uprog
> 		rt_serial_uprog: PRESS CTRL-C to EXIT
> 		rt_serial_uprog: timer started
> 		rt_serial_uprog: can't open rtser0
> 		rt_serial_uprog: stop timer
> 
> 		May i know which device is "rtser0"?
> 		shall i just change it to /dev/ttyS0?
> 
> 	Check Hannes' doku: you have to load the xeno_16550A driver.
> 
> 
> I'm also a beginner on Xenomai and I have the same problem as Kim Chuan Lim.
>  I verified my configuration : RTDM skin and 16550A driver are both integrated 
> in my 2.6.16 kernel, so these modules don't exist.
> Shall I create rtser0 node ?

Nope, there is no such thing as device nodes under Xenomai's RTDM skin.
But when your 16550A driver is compiled into the kernel, you have to
provide some hardware parameters via the boot command line to configure
at least one port:

8250.nr_uarts=0		(to keep Linux away from using the UARTs)
xeno_16550A.ioaddr=0x3f8 (first UART)
xeno_16550A.irq=4	(first UART)

Of course, you can also increase 8250.nr_uarts and move the 16550A
driver to some other port etc. I guess this should make it into
doc/txt/16550A-driver.txt as well...

Alternatively, turning xeno_16550A into a module again allows you to
reconfigure your hardware on a running system. Then that mentioned doc
file fully applies again.

Jan


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 250 bytes --]