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Philips App's: No 29 Bit Identifiers on LPC2292 ??

2005-03-18 by alipowsky

The following statement was given as response to a question via
Philips online support: 

"The attached errata lists the known bugs in the LPC2119.  Note that
FullCAN mode is not operative. Hence the CAN module on our ARM7
doesn't currently support 29 bit identifier because Full CAN is
inoperative."

Did there somebody mix up the terms FULL-CAM and 29 Bit identifier's??

Of course we use 29 Bit identifier in our actual LPC2292 project.
But we found a problem with global acceptance filtering:
We have a master sending frames to severall slaves and the slave
respond to this frames.
To reduce the interrupt overhead in the slaves, we use acceptance
filtering to filter all master frames, this is possible because we
defined one Identifier bit to be a direction Bit (0: Master => Slave,
 1: Slave => Master)

Before we used exceptance filtering we got overflow errors, because
every slave node also got the answer of all the other slave nodes.

When we use acceptance filtering we don't get this overflow errors,
but now it happens that our LPC-2292 Node stops to generate
CAN-Interrupts at all !

Did anybody made comparable experiences with the CAN-Interrupts.

Andreas Lipowsky

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