Application not working when Power OFF/ON is done while on
reset its working
neha_makhija
neha.makhija at honeywell.com
Tue Dec 19 21:19:58 PST 2006
M. Warner Losh wrote:
>
> In message: <20061219.091449.1973603691.imp at bsdimp.com>
> "M. Warner Losh" <imp at bsdimp.com> writes:
> : In message: <7943626.post at talk.nabble.com>
> : neha_makhija <neha.makhija at honeywell.com> writes:
> : : I am working on AT91RM9200 development board with ecos ported over it.
> I
> : : have burnt the flash with the redboot image. When i turn off the board
> and
> : : then turn it ON then the code doesnt work and doesnt show anything on
> the
> : : hyperterminal. But if i reset the board then the code is working fine.
> :
> : I'm guessing something is wrong with the power up sequence such that
> : the boot flash isn't quite right by the time the AT91RM9200 starts its
> : boot sequence.
>
>>>>> How can i check the power up sequence.
>
> In my experience, however, I've seen weird things when not the entire
> flash is burned. I've never used redboot because I didn't want the
> hassles of GPL'd software on the embedded project I was working on (I
> hate keeping track of all the tarballs, and the company doesn't want
> the hassles).
>
> I'd make sure that the redboot image was good for this board. Maybe
> it is waiting for some other part that is marginal and needs a second
> reset to work. Maybe it is compiled for a different PHY, so the
> initial reset sequence doesn't quite work. Maybe you have a hardware
> problem in the components that the boot code touches. We had a mixup
> on the magnetics of our ethernet port that caused odd behavior during
> the early stages of bringing up our board.
>>>>> But if I am switching ON/OFF multiple times still its not working. It
>>>>> doesnt matter for teh board how many times i reset it and everytime i
>>>>> am able to ping.
> Different PHY is not the case because that part is checked properly and it
> is taking teh right PHY.
>
> any other reason can u suggest.
> Warner
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