CAN init - how to use

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HolgHH
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Posted by HolgHH: Wed. May 16, 2012 - 03:52 PM
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Hi,

i'm working on my first CAN project with ASF(2.x, the one that comes with sudio 5.1) and i have some problems understanding how can_init (from can.c) works.

I would expect that i need to call can_init once during the initialization phase of my program, then do whatever i need to do with CAN. E.g. allocate + configure MOB, send MOB etc.
Most surprisingly all CAN examples i've looked at call can_init before _each_ action they perform, let it be send or receive?! Why is that :?

Even more bad, if i modify the example to only call can_init once, it will not work anymore :cry:

Any ideas?

Of course i could write my own init(wich i'm trying to do actually) but i need to understand the basics of ASF CAN first if it should be of any use for me...

Thanks
Holger

Tags:

Tools, Atmel Software Framework (ASF) and Atmel Start (ASFv4) (AVR-related)
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HolgHH
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Posted by HolgHH: Mon. May 21, 2012 - 11:29 AM
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Ok, found it out myself:

It's just the can_enable_interrupt() that was needed.
No idea why they do the full can_init for each message they want to send or receive :?

Holger

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sydalmighty
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Posted by sydalmighty: Tue. May 22, 2012 - 05:16 AM
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good job!

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