Dear All
I have made a customized DM648 board , copied the lrytech schematics.
My customized board , works well from 4 hours after which i see performance
degradation. My PCB contains Ethernet Subsystem, DDR , DSP , MSP430F169.
Its 12 layers and 92 mils in width.
Can any one plz tell me what maybe causing the performance degradation ?
Takecare
_____________________________________
DM648 Customized Board
Started by ●December 14, 2010
Reply by ●December 14, 20102010-12-14
gonewithdawind8,
On 12/14/2010 1:43 PM, g...@yahoo.com wrote:
>
> Dear All
>
> I have made a customized DM648 board , copied the lrytech schematics.
> My customized board , works well from 4 hours after which i see
> performance degradation. My PCB contains Ethernet Subsystem, DDR , DSP
> , MSP430F169.
> Its 12 layers and 92 mils in width.
>
> Can any one plz tell me what maybe causing the performance degradation ?
>
Short answer: No, using supplied information.
Determine if it is HW or SW. After performance has deteriorated, reboot
the board. If it performs well for about the same amount of time, you
probably have a SW problem - memory leak would be at the top of the list.
TIP: Throughout the board bring-up and debug process document EVERYTHING
that you do and EVERYTHING that
"the system does"
[system==board+PS+software+network+anythingthingElseConnected] - no
matter how small or insignificant that it might seem.
1. Does the "degradation" happen in 'one step' or does it gradually
increase once it has begun??
2. Think of the degradation as a 'performance problem' that you need to
measure. See if you can take measurements on high level tasks or
processes so that you can determine if the degradation is across or
specific to one or two particular tasks.
mikedunn
>
> Takecare
On 12/14/2010 1:43 PM, g...@yahoo.com wrote:
>
> Dear All
>
> I have made a customized DM648 board , copied the lrytech schematics.
> My customized board , works well from 4 hours after which i see
> performance degradation. My PCB contains Ethernet Subsystem, DDR , DSP
> , MSP430F169.
> Its 12 layers and 92 mils in width.
>
> Can any one plz tell me what maybe causing the performance degradation ?
>
Short answer: No, using supplied information.
Determine if it is HW or SW. After performance has deteriorated, reboot
the board. If it performs well for about the same amount of time, you
probably have a SW problem - memory leak would be at the top of the list.
TIP: Throughout the board bring-up and debug process document EVERYTHING
that you do and EVERYTHING that
"the system does"
[system==board+PS+software+network+anythingthingElseConnected] - no
matter how small or insignificant that it might seem.
1. Does the "degradation" happen in 'one step' or does it gradually
increase once it has begun??
2. Think of the degradation as a 'performance problem' that you need to
measure. See if you can take measurements on high level tasks or
processes so that you can determine if the degradation is across or
specific to one or two particular tasks.
mikedunn
>
> Takecare
Reply by ●December 14, 20102010-12-14
gone,
Since it worked 'well' for 4 hours before problems began, I would suspect a heat
source is causing a problem.
For instance the heating of the DSP causing a ball/solder joint under the DSP to
have a high resistance connection.
R. Williams
---------- Original Message -----------
From: g...@yahoo.com
To: c...
Sent: Tue, 14 Dec 2010 14:43:02 -0500
Subject: [c6x] DM648 Customized Board
> Dear All
>
> I have made a customized DM648 board , copied the lrytech schematics.
> My customized board , works well from 4 hours after which i see
> performance degradation. My PCB contains Ethernet Subsystem, DDR , DSP
> , MSP430F169. Its 12 layers and 92 mils in width.
>
> Can any one plz tell me what maybe causing the performance degradation ?
>
> Takecare
------- End of Original Message -------
_____________________________________
Since it worked 'well' for 4 hours before problems began, I would suspect a heat
source is causing a problem.
For instance the heating of the DSP causing a ball/solder joint under the DSP to
have a high resistance connection.
R. Williams
---------- Original Message -----------
From: g...@yahoo.com
To: c...
Sent: Tue, 14 Dec 2010 14:43:02 -0500
Subject: [c6x] DM648 Customized Board
> Dear All
>
> I have made a customized DM648 board , copied the lrytech schematics.
> My customized board , works well from 4 hours after which i see
> performance degradation. My PCB contains Ethernet Subsystem, DDR , DSP
> , MSP430F169. Its 12 layers and 92 mils in width.
>
> Can any one plz tell me what maybe causing the performance degradation ?
>
> Takecare
------- End of Original Message -------
_____________________________________
