[En-Nut-Discussion] SAM9260-EK getting started

[Alain M.]

Hi,

Paulo silva sent a version of crt to the list which I helped to debug. 
It SOLVES the problem of loading to SDRAM. It is just a very small 
initialization problem, iirc about osc or pll.

The downside is that he sent the whole file and not a patch (and there 
is a bit of debug code in it). Have a look at 2008-07-16 18:49.

It is all there, sorry if we didn't have time to document it, but you 
are welcome to do it,

Ivan Stojiljkovic escreveu:
> Hi all,
> 
> I have also similar problem as steve and I have no solution so far. I have
> problem running ethernut applications (on Olimex SAM9-L9260 board).
> 
> If I foolow instructions for running events application from ethernut site,
> the results are:
> - using SAM-BA 2.5 - everything runs without any problem (using both "Enable
> SDRAM 100 MHz" and "Enable SDRAM 133 Mhz")
> - using SAM-BA 2.8 - nothing is displayed on debug port (there is only
> "Enable SDRAM" here)
> Something is strange here, I compared SDRAM routines (lot has changed from
> 2.5 to 2.8 version) but could not figure it out what is the difference that
> matters. Also, "getting started" application from Atmel is working in all
> cases, so it seems that SDRAM is initialized properly. (When comparing
> content of SDRAM after downloading application from SAM-BA utilitiy, it
> shows that content of SDRAM is good in all cases).
> 
> Now comes the tricky part. I want to boot from dataflash, so there is
> bootstrap and ethernut (events) application on 0x8000 in dataflash.
> - using Atmel's bootstrap (compiling it on my own or using one from
> Linux4Sam) gives me no result, nothing is displayed on debug port (default
> start address 0x23F00000 is taken into account)
> - IMPORTANT: using bootstrap loader from
> http://www.ethernut.de/en/documents/sam-web-radio.html - makes ethernut
> application working. Unfortunatelly, there is only bin file, without source,
> so I can not compare what is changed here (on the sam-web-radio page it says
> that 'Thanks to Atmel France for providing two second stage boot loaders')
> (offtopic - are this second stage loaders?)
> 
> I tried PSilva's solution but with no result, thanks for the effort! maybe I
> am doing something wrong.
> 
> Also, using u-boot as second stage bootloader and downloading and starting
> ethernut application from it does not work.
> 
> Seems like something is realy wrong in crt file, but again - using bootstrap
> from sam-web-radio makes things work. What is the problem here?
> 
> Best regards,
> Ivan