RE: Single shot mode with arbitration support

Hi Daniel,

See below.  Unless it's changed.

John

From:
Doc No. IHSDB-APP-GEN-D-031 Date: March 2003

3.10 Link Layer Re-transmission on Error - Compulsory
The LLC sub-layer of the ISO11898 CAN standard includes amongst its
functions the retransmission
of frames that have been disrupted by errors during transmission. This
process can result in an unpredictable number of re-transmissions of the
same frame in
the event of errors.
This function shall be disabled by selecting CAN controllers that provide
the capability to
disable re-transmissions. Corrective procedures appropriate for the system
application
may then be executed by the node/device application software



-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Daniel Leu
Sent: January-17-13 6:09 PM
To: [email protected]
Subject: Re: [CANLIST] Single shot mode with arbitration support

Hi John,

> The problem is MilCAN doesn't allow error flags since a bad message 
> retrying could easily overlap into the next SYNC message window.  The 
> architecture of a MilCAN system is such that the designer plans what 
> messages occur during each SYNC slot.  A node may broadcast only when the
SYNC COUNTER was 24.
> Another only when 32 and so on.   

Just wondering where in the MilCAN spec it says that error flags are not
allowed. Thanks!


Regards,
Daniel




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