Hi Ferry,
Ferry de Groot wrote:
The board has already been produced so I'm pretty much stuck with it.
I've got one of the more simple application running in the 32-bit mode
right now. I'm still working to get DBUG fully running. I'm not fully
certain if the SDRAM is initialised the right way, so that'll be the
next step. I saw you reply about using the 16-bit DRR-SDRAM in 1,8V, i
knew that steriodmicros was going to release this new redesign cause of
the obsolete flash memory on the old design. We didn't choos for this
option cause of the higher possibility of interferantion with this lower
voltage. I would have preferred the 1,8V design, but it wasn't really an
option.
Anyway where can I find the system initialisation of the MCF5208 in the
uClinux distribution?
In the 2.4 kernel:
linux-2.4.x/arch/m68knommu/platform/5208/M5208EVB/crt0_ram.S
linux-2.4.x/arch/m68knommu/platform/5208/config.c
In 2.6 kernels:
linux-2.6.x/arch/m68knommu/platform/5307/head.S
linux-2.6.x/arch/m68knommu/platform/520x/config.c
But it really doesn't do a lot of system level initialization.
These RAM based setups rely on a boot loader initing the raw
hardware first.
Regards
Greg
From: "Bob Furber" <[EMAIL PROTECTED]>
Reply-To: uClinux development list <[EMAIL PROTECTED]>
To: "uClinux development list" <[EMAIL PROTECTED]>
Subject: RE: [uClinux-dev] Porting DBUG MCF5208 to 32-bits mode
Date: Mon, 29 Jan 2007 09:21:36 -0800
Hi Ferry,
> We've just made an board with MCF5208EVB with, 2 x 16 bits
> K4S641632H SDRAM
> and 2 x 16 bits S29JL032H Flash memory. Since the evalution board
design
> :
> In other words is there an part
> in the flash memory where its stores the hardware configuration,
such as
> telling it's running in 32 bits SDRAM mode? Or does the pin
> DRAMSEL describe this all?
You will have to modify sysinit.c (..\proj\m5208evb\src\sysinit.c on the
M5208EVB dBUG project) to support your SDRAM.
You will also have to change ..\src\dev\flash\amd_flash.c and
amd_flash.h to
support your flash and in the equivalent of
..proj\m5208evb\src\m5208evb.h
you will wnat to change "#define AMD_FLASH_AM29BDD160GB_16BIT" to specify
your flash.
> DBUG uses several files for programming configuration files the
> programmer
> such as the mcf5208.cfg, but these seem to used by the programmer
> it self.
I am not sure what you mean by "the programmer"
> Some of the linker configuration files flash.lcf and sdram.lcf in
> 5208_DBUG\dbug\proj\m5208evb\build\mwerks refer to the hardware
> configuration, but I can't see any reference to 32 bits SDRAM mode.
Do I
> need to change one of these files to get it running.
I can't speak to MWerks. But, gor GCC you will want to adjust RAM and
flash
sizes in the equivalent of \proj\m5208evb\build\gnu\flash.ld.
> Ferry de Groot
>
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