On Sat, 16 May 2009, Gerhard Fiedler wrote:

> sergio masci wrote:
> 
> > Baby steps!
> 
> > [...]
> 
> >> [...] and think that using the peripheral is somehow complicated,
> >> they've got a rude surprise coming when they start trying to
> >> implement all that functionality in firmware.
> >
> > Yes but when you've got a black box running really fast (your CAN
> > peripheral) doing all the magic without (or minimal) intervension it
> > gets really hard to debug stuff unless you are really experienced and
> > even then you sometimes need to use expensive kit like logic
> > analysers and storage scopes. Doing it the hard way using firmware
> > lets you slow things down even simulate them if you need to and best
> > of all it gives you an appriciation of what the "black box" is doing
> > when it comes time to migrate up to it.
> 
> There's no need to run CAN fast. I agree that setting up a CAN module is
> quite a bit more challenging than setting up a UART, but once you are at
> implementing a multi-master configuration, you're way past baby steps.

I disagree. Getting point to point working is trivial compared with a 
multi master network. Once you get PtP working yes you have some 
experience which will help you with the network but getting the network 
working also requires baby steps.

> I
> don't think Olin advocated for a complete beginner to implement his
> first single peer-to-peer connection with CAN.

My mistake, this is exactly what I thought Olin was advocating.

Regards
Sergio Masci
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