Boot from AT45 Flash

[Gilles-27]

Hi all,

Is anybody has writing a small text description about 'how to prepare, make
and burn an apps booting from Flash".

I currently use an 9260 Olimex board and use SAMBA to load in RAM and test
it.

I want to boot from the Flash device AT45DB161 connect thru SPI (PC11 is CS)

My programm size is around 100KB.

 

My vision about how to do it in ROM is not good and I will be happy if
somebody can give me an good overview (eventually piece of code :-)) about
the work to do.


Thanks for the help

Best regards

Gilles





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[Ethernut]

Hi Gilles,

Gilles wrote:

> I currently use an 9260 Olimex board and use SAMBA to load in RAM and test
> it.
>
> I want to boot from the Flash device AT45DB161 connect thru SPI (PC11 is CS)

Flash animations are available at
http://www.ethernut.de/en/documents/sam-web-radio.html

They've been done for Atmel's AT91SAM9260-EK with SAM-BA 2.4, but should
work for the Olimex board and the latest SAM-BA versions.

Harald

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[Ole Reinhardt-2]

Hi Gilles,

> > I currently use an 9260 Olimex board and use SAMBA to load in RAM and test
> > it.
> >
> > I want to boot from the Flash device AT45DB161 connect thru SPI (PC11 is CS)
>
> Flash animations are available at
> http://www.ethernut.de/en/documents/sam-web-radio.html
>
> They've been done for Atmel's AT91SAM9260-EK with SAM-BA 2.4, but should
> work for the Olimex board and the latest SAM-BA versions.

It might be an idea to use u-boot as a primary bootloader. You can
easily burn u-boot into the dataflash and there will be still enough
space to have your NutOS program there too. Using u-boot gives you the
great advantage to be able to update your software quite easily through
different protocols (TFTP, x/y-modem, ...) and you even could write
different ethernut programs into your dataflash and select the code to
run during boot time.

It's a little more complicated than just burning a single NutOS via
SAM-BA into the flash.

If you need more support just ask me in a private mail.

Regards,

Ole Reinhardt


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