RE: Toucan softreset issue

There is no undocumented interrupt during soft reset. The softreset
takes less than 20 can (IMB) clocks.

So you take a reset when you perform a softreset on CAN_B while CAN_A is
in bus off, and if you disable interrupts (CAN_A, CAN_B, EE ?) just
before performing a softreset, your code runs as expected?  

Is it possible you're simply not handling your interrupts correctly i.e.
if you handle interrupts without doing a softreset, do you still get a
reset?

Perhaps you could explain the interrupts in more detail i.e. which
interrupt do you disable to avoid the problem?  Are you taking a BUS OFF
exception i.e. are you performing softreset within busoff ISR? If you do
not perform softreset, can you confirm that your interrupt handles
correctly?

Regards,
Allan 

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Sudhersan Lal
Sent: Friday, March 24, 2006 9:48 AM
To: [email protected]
Subject: RE: [MPC500] Toucan softreset issue


Hello Allan 
I am doing a softreset for the TOUCAN Module during
the bus off interrupt. Is there any possibility of
generating any other kind of interrupt during soft
reset (documented / undocumented ) ? In general how
long it will take to complete the softreset
functionality ? 

The only mistake I did was , I was doing a softreset
on CAN B when detected bussoff in CAN A.  But
according to the documentation , this should not cause
any other issues or interrupts . The
problem(reset,external watchdog) goes away when I
disable interrupts during soft reset .

Regards
Sudhersan


--- Dobbin Allan-r11834 <[email protected]>
wrote:

> Please explain exactly what problems you are seeing.
> 
> - Allan
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf
> Of Sudhersan Lal
> Sent: Friday, March 24, 2006 7:52 AM
> To: [email protected]
> Subject: [MPC500] Toucan softreset issue
> 
> 
> Hello All
> I am facing some problems with TOUCAN softreset
> functionality. When I am disabling the interrupts
> during the soft reset , the problems goes away.
> Wondering anybody else has faced this problem before
> ?
> 
> Is there any recommendations like disable interrupts
> during toucan softreset ? Is there any errata
> avaialbe
> with respect to this other than one "CAN: Bus Off
> recovery not ISO compliant" ?
> Regards
> Sudhersan
> 
> 
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