[Xenomai-help] Blackfin serial port in Xenomai

[Xenomai-help] Blackfin serial port in Xenomai

[Nikolaj Fogh]

Hi,

I am trying to interface with a serial port on a bluetechnics cm-bf537e
board (a blackfin chip). However, it seems that the serial port in the
blackfin is not compatible with a 8250 chip, so I cannot get the xenomai
rtdm serial driver working. Has anyone got a driver for the blackfin
serial port for hard real time.

Right now, I am just printf'ing to a serial console to print data. I
would like to avoid that.

Thanks
  - Nikolaj Fogh

Re: [Xenomai-help] Blackfin serial port in Xenomai

[Philippe Gerum]

Nikolaj Fogh wrote:
> Hi,
> 
> I am trying to interface with a serial port on a bluetechnics cm-bf537e
> board (a blackfin chip). However, it seems that the serial port in the
> blackfin is not compatible with a 8250 chip, so I cannot get the xenomai
> rtdm serial driver working. Has anyone got a driver for the blackfin
> serial port for hard real time.
> 

I don't know of any, yet.

> Right now, I am just printf'ing to a serial console to print data. I
> would like to avoid that.
>

If that is just for text output, you could build a trivial rtdm driver accepting
strings from the write_rt endpoint and relay it to the debug routine available
with the I-pipe code for this arch, i.e.:
void __ipipe_serial_debug(const char *fmt, ...);

Caution: this routine is very naive, and locks out hw interrupts until the
entire string has been sent out to the wire; you may want to either fix it for
your needs, or send small strings, one at a time.

> Thanks
>   - Nikolaj Fogh
> 
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> 


-- 
Philippe.