Lpc2000

jayasooriah ha scritto:
> Hi Joe,
>
> If you are prepared to take responsibilty for your device, and not
> feel intimidated by Philips advice "we do not guarantee your part if
> you use your own bootloader", I have one that does this.
>   
Also I am interested to stud about this problem.
> It appears that my release of this to the public domain may infringe
> upon secrecy of undisclosed information contained in the bootloader
> relating to how Philips limits the amount of on-chip RAM and ROM that
> is enabled on the chip depending on what part it is suppopsed to be.
>   
Hmmm... I read carefully software Italy patents laws (I am italian) and 
they permits reverse engineering so I wouldn't have problems to do this.
> Incidentally my algorithm works better than Philips one in that it
> does way with the need to specify clock speed.
>
> Jaya
>
> P.S. I do not believe Philips provides any guarantees whatsovever as
> far as the bootloader is concerned and thus I ignore Philips advice.
>
> --- In lpc2000@yahoogroups.com, "phlpcmicro" <joseph.goldburg@...> wrote:
>   
>> Hi,
>>
>> Has any one considered "rolling their own" boot loader for the LPC2000
>> series?
>>
>> Purpose - so that P0.14 can be released from the POR bootup
>> requirement.... and used for all GPIO actions.
>>
>> Say for example instead of looking at P0.14 (GPIO) on POR  looking at
>> UART Rx incoming data...
>>
>> The Philip P89V51 (80c51) series looks at the incomming UART traffic
>> looking for 'U' character for ~ 400mS  - then deciding weather to
>> execute bootload operation or jump to 0x000 (user code).
>>
>> Philips offered up the bootloader hex files when there was an
>> improvement on the bootloader of some parts  AND a method for
>> uploading the bootloader.
>>
>> Has anyone considered "Roll Their Own Bootloader"?
>>
>> Obviously  "Rolling Your Own" can be thwart with danger.
>>
>> Regards
>> Joe G.
>>
>> Applogies if I have missed a thread that has already covered this
>>     
> subject.
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> Yahoo! Groups Links
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No virus found in this outgoing message.
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Version: 7.1.385 / Virus Database: 268.5.1/326 - Release Date: 27/04/2006


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