John Williams | 2 Jun 12:27 2003
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CVS update

Hi everyone,

I've just submitted a modest revision to the cvs (cvs.uclinux.org) 
repository bringing the microblaze support up to date.  The root 
filesystem (romfs) now uses the MTD drivers instead of blkmem, and that 
all seems to work ok.

Also the "elf2flt" module at cvs.uclinux.org contains up to date 
microblaze support.  I'll be putting a "uclinux-dist" patch out soon as 
well, which will update microblaze uClibc support and the general build 
environment (/vendors).

It's now possible to just do "make" and the kernel, filesystem and user 
programs all build and are placed into an image ready to load into the 
flash.

Regards,

John

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John Williams | 3 Jun 07:57 2003
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latest patches

Hi folks,

The latest patches against uClinux-2.4.x and uClinux-dist are now 
available on the project web site under "downloads".  I've also updated 
the getting started page to reflect the latest procedures.  Please let 
me know if you have any problems (or successes!) with these files.

Thanks,

John

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John Williams | 5 Jun 02:50 2003
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microblaze + DDR

Hi folks,

Has anybody had any luck with the opb_ddr controller and microblaze? 
I'm trying to get this up and running on the insight board and am having 
a pretty hard time of it.

I've downloaded Insight's ddr_test_wrapper bitstream and it works, so 
there's nothing wrong with my board, but for some biazrre reason they 
didn't distribute the design files!

For example, as far as I can tell the insight manual doesn't even 
properly document which FPGA pin is connected to the external DDR clock 
feedback path.  I think it's "F13", but various things I'm seeing 
suggest this may be wrong.

I'm trying to get the clock generation going as per the OPB_DDR 
documentation.  If I route the ddr_clk, ddr_clkn and ddr_fb_clk signals 
to general user io pins (the LVDS bank) and make the clock feedback path 
myself with a jumper wire, it works fine (well, at least both DCMs 
achieve lock).  However, if I route these signals to the pins as 
described in (or inferred from) the Insight manual, I can't get DCM lock 
on the feedback path.

If anybody can help out on this I would be most appreciative - I've more 
  or less hit the limit of what I can do in the 1MB SRAM, so I need to 
get this working.

Thanks,

John
(Continue reading)

John Williams | 5 Jun 03:58 2003
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Re: microblaze + DDR

Hi everyone,

Well happily I can reply to my own message and say "no worries, it's 
working now".  Full marks to Nasser Poureh from Insight who responded in 
a flash to an email I sent him, he got back to me with a working 
microblaze + ddr example.  I took that stuff across to my ddr test 
hardware and i'm up and running already.

Next is to integrate it into mbvailla which shouldn't take long, then 
the kernel with have a massive 32MB to play with! :)

I'm happy to pass on my ddr example if anybody wants it, otherwise 
you'll just see the changes folded in to the mbvanilla target in the 
next few days.  The main trick (or at least what I was missing) with the 
ddr was specifying the correct IOSTANDARD constraints...   After that 
it's all pretty plain sailing.

Regards,

John

John Williams wrote:
> Hi folks,
> 
> Has anybody had any luck with the opb_ddr controller and microblaze? I'm 
> trying to get this up and running on the insight board and am having a 
> pretty hard time of it.
> 
> I've downloaded Insight's ddr_test_wrapper bitstream and it works, so 
> there's nothing wrong with my board, but for some biazrre reason they 
(Continue reading)

Jari | 5 Jun 11:15 2003
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microblaze and RTAI

Hi all,

I intend to port RTAI to uClinux in MicroBlaze.
It's great that I can have 32MB RAM to work with. I will start to do
that when I have the latest patch and a JTAG.

Regards,
Jari

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owner | 5 Jun 22:25 2003
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microblaze-uclinux@...: Admin request: /^subject:\s*subscribe\b/i

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(Continue reading)

John Williams | 6 Jun 00:43 2003
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DDR demo

Hi everyone,

Our DDR demo for the Insight Virtex2 board is now available on the 
downloads page of the mblaze-uclinux website.

Included in the project are two useful ip cores - my_dcm which wraps 
around a DCM to generate a primary 66mhz system clock from the 100mhz 
board clock, and ddr_clk_gen which contains two DCMS, generating the 
clocks required by the DDR controller and maintaining phase relationship 
on the external ddr feedback clock.  The DDR core timing parameters, and 
pin constraints are taken directly from Insight Electronics' DDR demo 
project.

Connect a terminal listening at 115200 baud on the Virtex board's serial 
port, change to the project directory and do a "make -f system.make 
download".  The project is currently set in executable mode so it will 
just launch the trivial DDR test application (loop through the address 
space, write/read a test pattern and repeat).

Note you may need to toggle the system reset (SW1 on the dip switches) 
to reset the DCMs.  The top segments of the two LED displays should 
light up indicating that both DDR DCM clocks have successfully locked.

Regards,

John

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(Continue reading)

John Williams | 10 Jun 09:47 2003
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flash tools

Hi everyone,

The tcl/xmd-based flash tools I use are now available on the downloads 
page of the mblaze-uclinux website.  Included are Jan Shunke's flash 
script (with one minor modification), and another tiny one I wrote which 
uses Jan's tools to do binary file uploads via xmd.  Jan's script 
already does intel ihex and I think another format as well.

It's not Insight/Memec specific - but it does expect AMD-style flash. 
If you've got an OPB external memory controller hooked up to 32-bit wide 
flash on your board, these tools should work straight from the box. 
Some changes would probably be necessary for Intel flash - I'm not sure.

Don't forget to set the flash base address (e.g. 'base 0xff000000').

The syntax of the binary download command is simple:

fdow_binary filename address

e.g. fdow_binary image.bin 0xff000000

I'll be putting together some short HOWTO documents soon, but basically 
this is how I use these tools:

 From an elf image file (e.g. the uclinux kernel image.elf), create a 
raw binary file:

$ mb-objcopy -O binary image.elf image.bin

Then fire up xmd and "source" the flash tools:
(Continue reading)

Holger.Nissle | 11 Jun 01:01 2003

Holger Nissle/DEMAN/LMSCentral/Leica is out of the office. ( Virus scanned ! )

Ich werde ab  07.06.2003 nicht im Büro sein. Ich kehre zurück am
23.06.2003.

I will respond to your message when I return.

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John Williams | 14 Jun 02:57 2003
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[Fwd: uclinux microblaze]


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From: Tracy L. Hill <thill@...>
Subject: uclinux microblaze
Date: 2003-06-13 12:31:59 GMT
Hi,
    I had started playing with the linux tools in order to switch over 
to building the kernel under linux. I was wondering what is the 
distro/version of linux that most people are using or having success 
with. I have Redhat 8 loaded but did have some problems when I started 
to build uclinux. I thought I would ask about the Distro/versions .

Thanks
Tracy

Gmane