Re: [ECOS] more than one serial drivers

[Jonathan Larmour <jifl at eCosCentric dot com>]

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Thomas Eschenbacher wrote:
> Jonathan Larmour wrote:
>
> > [...]
> > Yes you can have both multiple instances of the same driver (for 
> > different ports with the same chip) and multiple different drivers. 
> > You can't just pull packages in to your configuration though... it's 
> > up to the board specific serial driver package to do that as it 
> > contains the details on hardware layout etc.
>
>
> As far as I understand from your answers, I can only have one serial
> driver package at all. And extending one serial driver package to more
> "channels" is easy, that far you are right.

You can have more than one serial driver package. But since one of them 
will be board-specific there seems little point in having multiple board 
specific ones. Up to you though.

> But I do not know how I could combine two very different packages like
> mine: one is like the AT91 builtin, the other is based on the
> 16550/generic package.

Include them both in your target's configuration in ecos.db, along with a 
board specific driver for the generic 16550. Then just make sure they have 
different names (i.e. the CDL in the board specific driver (that uses the 
16550) defaults to /dev/ser2 upwards).

> I would like to understand what goes wrong in my case, where do those
> two packages collide? I expected that the build system detects a
> conflict and aborts with an error, but it just builds "something" and
> only the second driver survives. So what is so different about _serial_
> drivers, all other drivers can co-exist without any problem?

If it builds okay, then it's probably the names.

Jifl
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