FPGA Central

Hi,

I'm working on an system (in Verilog) that I want to interact with
MMC and/or SD memory cards, so I'm looking for a Verilog model for
any MMC card (or a generic model of an MMC card) that I can use for
system-level test benches.

I need it to work under Icarus Verilog. Samsung has models of their
MMC cards, but they are `protect'ed so they do me no good. Other
vendors use Denali, which also seems closed to Icarus Verilog.

--
Steve Williams "The woods are lovely, dark and deep.
steve at icarus.com But I have promises to keep,
http://www.icarus.com and lines to code before I sleep,
http://www.picturel.com And lines to code before I sleep."

Looks like this MMC design from "opencores" can be used as MMC model:

http://www.opencores.org/cvsweb.shtm.../xmsmmc_core.v

-Alex


Stephen Williams wrote:
> Hi,
>
> I'm working on an system (in Verilog) that I want to interact with
> MMC and/or SD memory cards, so I'm looking for a Verilog model for
> any MMC card (or a generic model of an MMC card) that I can use for
> system-level test benches.
>
> I need it to work under Icarus Verilog. Samsung has models of their
> MMC cards, but they are `protect'ed so they do me no good. Other
> vendors use Denali, which also seems closed to Icarus Verilog.
>
> --
> Steve Williams "The woods are lovely, dark and deep.
> steve at icarus.com But I have promises to keep,
> http://www.icarus.com and lines to code before I sleep,
> http://www.picturel.com And lines to code before I sleep."

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Alex wrote:
> Looks like this MMC design from "opencores" can be used as MMC model:
>
> http://www.opencores.org/cvsweb.shtm.../xmsmmc_core.v

I'm not seeing in that a model for an MMC *card*, this is a design
that controls a card to cause it to program an FPGA. I would think
that the design was simulated, but I do not see the MMC model that
is used.

I'm going to be writing a block device controller, so I need a model
for the *card* against which I can test my controller.

> Stephen Williams wrote:
>> Hi,
>>
>> I'm working on an system (in Verilog) that I want to interact with
>> MMC and/or SD memory cards, so I'm looking for a Verilog model for
>> any MMC card (or a generic model of an MMC card) that I can use for
>> system-level test benches.
>>
>> I need it to work under Icarus Verilog. Samsung has models of their
>> MMC cards, but they are `protect'ed so they do me no good. Other
>> vendors use Denali, which also seems closed to Icarus Verilog.
>>
>> --
>> Steve Williams "The woods are lovely, dark and deep.
>> steve at icarus.com But I have promises to keep,
>> http://www.icarus.com and lines to code before I sleep,
>> http://www.picturel.com And lines to code before I sleep."
>


- --
Steve Williams "The woods are lovely, dark and deep.
steve at icarus.com But I have promises to keep,
http://www.icarus.com and lines to code before I sleep,
http://www.picturel.com And lines to code before I sleep."
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The SD format is significantly protected. You'd think it was entirely
proprietary but the technology sharing method I understand is used is
"membership only" and the reason you won't find a Linux driver.

You might be able to find an MMC resource but our guy here who's tried to
get closer to the SD/MMC specs hasn't come across one in his travels.

Stop looking for SD and start looking exclusively for MMC. Luck be with
you.


"Stephen Williams" <[email protected]> wrote in message
news[email protected] ...
> Hi,
>
> I'm working on an system (in Verilog) that I want to interact with
> MMC and/or SD memory cards, so I'm looking for a Verilog model for
> any MMC card (or a generic model of an MMC card) that I can use for
> system-level test benches.
>
> I need it to work under Icarus Verilog. Samsung has models of their
> MMC cards, but they are `protect'ed so they do me no good. Other
> vendors use Denali, which also seems closed to Icarus Verilog.
>
> --
> Steve Williams "The woods are lovely, dark and deep.
> steve at icarus.com But I have promises to keep,
> http://www.icarus.com and lines to code before I sleep,
> http://www.picturel.com And lines to code before I sleep."

John_H wrote:
> The SD format is significantly protected. You'd think it was entirely
> proprietary but the technology sharing method I understand is used is
> "membership only" and the reason you won't find a Linux driver.
>
> You might be able to find an MMC resource but our guy here who's tried to
> get closer to the SD/MMC specs hasn't come across one in his travels.
>
> Stop looking for SD and start looking exclusively for MMC. Luck be with
> you.

My plan has indeed been to focus on mmc because of the absurd
restrictions of the SD standard, but I understand that SD cards
should support the MMC command set.

A lot about the MMC standard can be gleaned from datasheets for
parts. For example, the Samsung datasheet seems quite thorough and
if all else fails I'd code up a Verilog model based on that. If
my design (which I will test against this model) doesn't work when
talking to real cards, then I'll (meaning my company) spring for the
MMC standard, which is a mere $500.00.

(FWIW I've got approval to open-source the Verilog for the device
I'm working on, so the next guy won't have this struggle.)

(I wonder where I can get a devel board that is an FPGA with an
attached MMC socket...)

> "Stephen Williams" <[email protected]> wrote in message
> news[email protected] ...
>> Hi,
>>
>> I'm working on an system (in Verilog) that I want to interact with
>> MMC and/or SD memory cards, so I'm looking for a Verilog model for
>> any MMC card (or a generic model of an MMC card) that I can use for
>> system-level test benches.
>>
>> I need it to work under Icarus Verilog. Samsung has models of their
>> MMC cards, but they are `protect'ed so they do me no good. Other
>> vendors use Denali, which also seems closed to Icarus Verilog.
>>
>> --
>> Steve Williams "The woods are lovely, dark and deep.
>> steve at icarus.com But I have promises to keep,
>> http://www.icarus.com and lines to code before I sleep,
>> http://www.picturel.com And lines to code before I sleep."
>
>


--
Steve Williams "The woods are lovely, dark and deep.
steve at icarus.com But I have promises to keep,
http://www.icarus.com and lines to code before I sleep,
http://www.picturel.com And lines to code before I sleep."

Stephen Williams <[email protected]> writes:
> (I wonder where I can get a devel board that is an FPGA with an
> attached MMC socket...)
>

Here's one which might be a bit OTT!
http://www.enterpoint.co.uk/moelbryn/broaddown4.html

These have miniSD - is that the same electrically?
http://www.eubus.net/hydraXC/

Cheers,
Martin

--
[email protected]
TRW Conekt - Consultancy in Engineering, Knowledge and Technology
http://www.conekt.net/electronics.html