Re: [ECOS] creating a new template

[Gary Thomas <gary at mlbassoc dot com>]

Gregg Levine wrote:
> Hello!
> In the collections of templates I see three Intel386 based PC ones. I
> would like to create one that contains everything except networking by
> means of the preselected devices.
> 
> Can anyone suggest the steps needed?
> 

Firstly, you probably mean "target", not "template".
Targets are ways of instantiating a particular hardware
platform (architecture, 'motherboard', devices, etc).
Templates describe collections of software packages
and are hardware neutral.

For example, the 'pc_i82559' target describes a generic
PC which has, in particular, hardware support for the
Intel 82559 PCI ethernet controller.  If you build eCos
like this:
  % ecosconfig new pc_i82559 minimal
  % ecosconfig tree
  % make
the resulting eCos kernel will run on that PC [box], but
since the template used (minimal) does not include any
networking support packages, the fact that the target
specified the i82559 driver is irrelevant.  In fact,
you would get an identical eCos kernel from
  % ecosconfig new pc_i82544 minimal
  % ecosconfig tree
  % make

Given the way that CDL is used to enable/disable the
building of drivers, etc, the ethernet drivers in either
of these examples won't even be built.

If you don't want networking, then don't use a template
which includes network support.  If you examine the templates,
you'll see that only 'net', 'lw_ip' and 'all' include networking.
If you start with any other template, you have to explicitly
add network support, regardless of what hardware device
drivers the particular target may support.


-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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