Re: [Xenomai-help] implementing a new rtdm driver

[Jan Kiszka <jan.kiszka@domain.hid>]

Axel Beierlein wrote:
> Hello,
> 
> i will implement my Serial ppc-PSC driver into the rtdm and
> there are some hardwarespecific things that differ from the 
> implementation of the 16550A.
> 
> Is it right that i have to add these things to the existing Serial 
> Profile in rtserial.h?

Well, unless that UART comes with some very special features or someone
made a mistake when defining the serial profile, you should be able to
provide a compatible driver.

> What for is the device sub class Makro and how can i use it for a new 
> profile? Perhaps #ifdef compiling?

Please discuss with us what you want to #ifdef so that we can tell you
why you shouldn't. ;)

Regarding the subclass: It might only be for informational purposes, but
it would definitely make sense when you add new services to the profile
(or leave out existing ones).

> 
> Summarize:
> What is the preferred way to implement an new serial Hardware into the 
> existing RTDM Serial Device Profile?
> 

Unless you find significant shared code in your to-be-written driver and
the 16550A, I would say go for a separate implementation of the same API
(== RTDM profile). If you find common code, than let us discuss some
generic UART framework for RTDM.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux