APC overflow

APC overflow

[Tang Nguyen]

Hi all,

I am porting 860sar version 2.2 on my system, which run @100Mhz for system
clock and @50Mhz for Bus clock.  The ESAR driver was initialized very
clean - but when I start passing UBR traffic, I always got APC overflow
interrupt.  The physical rate of my system is 2.3MHz - and I have configured
the PCR to 5424 - It should be OK but I have no idea why I got APC over flow
interrupt.  Any help and suggestion from you would be greatly appreciated.

-t


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Re: APC overflow

[Tang Nguyen]

Hi Li,

Thank you very much for your suggestion.
Yes,  my system can receive correctly - but the transmitter does not work
even I have masked APCO interrupt.
The line rate is 2.3Mbs, so the PCR should be 2.3Mbs/(53*8) ->5424 cells.  I
have tried to increase the PCR but no luck.
Do I need to check anything else ?

-t


----- Original Message -----
From: "li" <slowforce@21cn.com>
To: "Tang Nguyen" <tang@netoriented.com>
Cc: <linuxppc-embedded@lists.linuxppc.org>
Sent: Thursday, March 25, 2004 3:35 AM
Subject: Re: APC overflow


Maybe your PCR is too small?
or you can try receice first

Regards
Li
>
> Hi all,
>
> I am porting 860sar version 2.2 on my system, which run @100Mhz for system
> clock and @50Mhz for Bus clock.  The ESAR driver was initialized very
> clean - but when I start passing UBR traffic, I always got APC overflow
> interrupt.  The physical rate of my system is 2.3MHz - and I have
configured
> the PCR to 5424 - It should be OK but I have no idea why I got APC over
flow
> interrupt.  Any help and suggestion from you would be greatly appreciated.
>
> -t
>
>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/