| Author |
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avrbasic
Guest
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 Posted:
Sat Jan 01, 2005 4:18 pm Post subject:
Free IP-Core for FPGA Config from MMC-Cards |
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Hi all,
I have decided to make some presents to all in form of IP-Core donations:
http://www.opencores.org/projects.cgi/web/mmcfpgaconfig
There is working/tested IP-Core that allows FPGA configuration from MMC
Card. The IP as submitted to opencores does not support SD-Cards, but is
otherwise tested and useable. Tested with MMC, XC9536XL as config controller
and VP20 as target tot be configured.
Similar IP-Core (SD/MMC config IP-core for Altera) from an commercial vendor
costs around 1900EUR !
Antti |
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Sylvain Munaut
Guest
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| Posted:
Sat Jan 01, 2005 7:02 pm Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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avrbasic wrote:
Well, that's original ;)
Thanks and happy new year ;)
Sylvain |
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Wojciech Zabolotny
Guest
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| Posted:
Sun Jan 02, 2005 10:09 pm Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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avrbasic wrote:
| Quote: | Hi all,
I have decided to make some presents to all in form of IP-Core donations:
http://www.opencores.org/projects.cgi/web/mmcfpgaconfig
There is working/tested IP-Core that allows FPGA configuration from MMC
Card. The IP as submitted to opencores does not support SD-Cards, but is
otherwise tested and useable. Tested with MMC, XC9536XL as config controller
and VP20 as target tot be configured.
Adding of SD-card support in the SPI mode should not be so difficult. |
Aren't the SD-cards able to work in the MMC-compatible mode?
It seems to me that I have at least one device which works with SD cards
using the SPI interface.
Unfortunately I had no time to connect it to the logic state analyser to
compare the waveforms with MMC card and with SD card (I hope to do it in
reasonable future though ;-) ).
Thanks a lot for nice core,
Regards, Wojtek Zabolotny |
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Wojciech Zabolotny
Guest
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RobJ
Guest
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| Posted:
Sun Jan 02, 2005 11:20 pm Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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avrbasic wrote:
| Quote: | Hi all,
I have decided to make some presents to all in form of IP-Core
donations: http://www.opencores.org/projects.cgi/web/mmcfpgaconfig
There is working/tested IP-Core that allows FPGA configuration from
MMC Card. The IP as submitted to opencores does not support SD-Cards,
but is otherwise tested and useable. Tested with MMC, XC9536XL as
config controller and VP20 as target tot be configured.
Similar IP-Core (SD/MMC config IP-core for Altera) from an commercial
vendor costs around 1900EUR !
Antti
|
I just designed the same thing a couple of weeks ago, but to read from an
Atmel DataFlash card. I didn't feel like messing with the MMC/SD commands.
The Atmel cards use the MMC form factor and SPI interface but don't require
the MMC commands. But now that you've done the work I may fold in MMC
support. Thanks for contributing the code, Antti.
Rob |
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Antti Lukats
Guest
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| Posted:
Mon Jan 03, 2005 3:46 pm Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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Hi and thanks for the pointers.
well the SD Card support is not that easy a combined MMC-SD card IP-Core would be at least 50 PLD Cells (MMC only is 21 Macrocells). I know all the spec and differencies, I just never got enough time to add SD support.
One option could of course be using SPI mode, but thats not so nice.
When MMC-SD Card is left in MMC mode then the FPGA can after config use its own MMC Core to communicate with the Card, if the config core initializes SPI mode then FPGA should also access the card in SPI mode.
Antti |
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Kryten
Guest
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| Posted:
Mon Jan 03, 2005 8:00 pm Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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I was under the impression that SD was designed to be a superset of MMC,
e.g. that if you plugged one into an MMC socket the equipment would read it
in that mode.
That sounds sensible but the SD designers may not have been.
Is it that SD equipment can read both cards but MMC equipment can only read
MMC?
Your project is very welcome, those configuration memories are way too
expensive.
I wonder how hard it would be to have a small micro (e.g. AVR 2313?) reading
a FAT-formatted SD card to get a fixed named file (e.g. FPGA_CFG.ROM) to
load the FPGA?
That would allow ordinary PC software to just copy the file across, rather
than have to write to a linear sequence of blocks.
As a useful bonus, the SD card after FPGA-loading might be handed over to
the target micro for normal memory card duties. So long as it doesn't mess
around with the FPGA_CFG.ROM file of course!
The target micro may even be the same as the loader micro.
I hear FAT handling is non-trivial, so perhaps having written it for the
loader micro the loader could also be useful as an I/O slave. Might save a
lot of porting work. |
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Mike Treseler
Guest
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| Posted:
Mon Jan 03, 2005 8:19 pm Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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Kryten wrote:
| Quote: | I wonder how hard it would be to have a small micro (e.g. AVR 2313?) reading
a FAT-formatted SD card to get a fixed named file (e.g. FPGA_CFG.ROM) to
load the FPGA?
|
Flash file systems are available to do this
if your micro can compile C code.
Vendor-specific versions are sometimes free.
-- Mike Treseler |
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Kryten
Guest
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| Posted:
Tue Jan 04, 2005 12:40 am Post subject:
Re: Free IP-Core for FPGA Config from MMC-Cards |
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"Mike Treseler" <mike_treseler@comcast.net> wrote in message
news:qZWdnYYDOKj0_0TcRVn-gQ@comcast.com...
| Quote: | Kryten wrote:
I wonder how hard it would be to have a small micro (e.g. AVR 2313?)
reading a FAT-formatted SD card to get a fixed named file (e.g.
FPGA_CFG.ROM) to load the FPGA?
Flash file systems are available to do this
if your micro can compile C code.
Vendor-specific versions are sometimes free.
|
If/when I have time I will look around for code.
There are some amateur MP3 player projects on the web, using FAT but they
tend to use IDE drives or CF cards. Oh well, they might be a fair starting
point... |
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