I had the same issue - however, instead of writing a RTDM driver, I
manipulated the memory registers directly, taking advantage of the ARM
architeture way of manipulating drivers. I do have the code available, if
you are interested, and plan on publishing a few technical documents on
getting Xenomai to work with the PXA270 (the Gumstix platform), including a
section on accessing all of the peripherals in real-time.
I would like to know if there is a "cleaner" solution, other than porting
the current driver to RTDM.
Hope this helps,
--
-Felipe Brandão Cavalcanti
LARA - Robotics and Automation Laboratory
Department of Electrical Engineering
UnB - University of Brasília, Brazil
http://www.lara.unb.br/~fbcavalcanti/
On Wed, Nov 11, 2009 at 7:37 PM, Linus Casassa <[email protected]> wrote:
> Hi.
>
> I am using open/read/write for a serial port. But the read function delays
> 8 ms from the last bit received untill it returns the chars.
>
> Obviously you would say open/read/write functions are not realtime
> functions.
>
> I changed open/read/write to rt_dev_open/rt_dev_read/rt_dev_write but the
> open function returns -19.
>
> I am using /dev/ttyS2.
> Looking the proc directory I found that there is an interrupt on the serial
> port I want to use: FFUART
>
> r...@gumstix-custom-verdex:~$ cat /proc/interrupts
> CPU0
> 3: 2 SC ohci_hcd:usb1
> 6: 0 SC pxa_i2c-i2c.1
> 18: 0 SC pxa_i2c-i2c.0
> 22: 76 SC FFUART
> 23: 204 SC pxa2xx-mci
> 25: 0 SC DMA
> 26: 198061 SC ost0
> 163: 4720 GPIO eth0
> Err: 0
> r...@gumstix-custom-verdex:~$
>
> Thanks.
>
> --
> Linus Casassa
> Estudiante Ingeniería Civil Electrónica
> Fono: 56-9-97776941
>
> _______________________________________________
> Xenomai-help mailing list
> [email protected]
> https://mail.gna.org/listinfo/xenomai-help
>
>
_______________________________________________
Xenomai-help mailing list
[email protected]
https://mail.gna.org/listinfo/xenomai-help
