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We are using “MPC5746C” in our project. We want to understand a specific item in CAN mail functionality.  We configured MB4, MB5, MB6 mailboxes for receiving CAN messages  ( Without any Filters).  When we transmit continuously transmit messages we observe

Question asked by KISHORE KUMAR MALLELA SETTURU on Aug 31, 2016
Latest reply on Sep 1, 2016 by Martin Kovar

MPC5746C Micro - CAN MB functionality Quesiton.

 

We are using “MPC5746C” in our project. We want to understand a specific item in CAN mail functionality.

We configured MB4, MB5, MB6 mailboxes for receiving CAN messages  ( Without any Filters).

When we transmit continuously transmit messages we observe that only MB4 will be filled with various CAN messages but MB5 and MB6 mail boxes will not be filled at all.

Due to this, MB4  CODE shows it’s OVERRUN and we are losing few CAN messages.

As per our understanding, if MB4 is full and if new message comes, then MB5 should be filled, but it’s not happening.

Any comments on this behavior and how to overcome the problem.

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