MMC/SD

Started by upand_at_them March 23, 2005

I have a PIC working with an MMC as a datalogger, but when I use an
SD card it doesn't work. They both use SPI so I don't know what
could be wrong. Has anyone used an SD card with a PIC?

Mike


i want to use mmc with pic but i have no information obout the mmc .
can you help me?
send me some info .
thanks alot


upand_at_them <u...@yahoo.com> wrote:

I have a PIC working with an MMC as a datalogger, but when I use an
SD card it doesn't work.  They both use SPI so I don't know what
could be wrong.  Has anyone used an SD card with a PIC?

Mike


to unsubscribe, go to http://www.yahoogroups.com and follow the instructions




Googling "pic mmc" returns a very good example as the first result:

http://www.captain.at/electronics/pic-mmc/

This is what I used to get started. And it's about all you'll need to
get a PIC working with an MMC. It even has the code. If you want to
write FAT files to the card (I do) then you'll also need to read the
FAT spec from Microsoft:
http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx

Mike --- In piclist@picl..., a m <ali_2331@y...> wrote:
> i want to use mmc with pic but i have no information obout the mmc .
> can you help me?
> send me some info .
> thanks alot




Interesting web site! This looks like a simple to implement system. Now,
does anyone know of a source for MMC connectors? I'd like to try this code
out but I don't want to permanently attach (solder) an MMC card to a circuit
board. Clip leads might be OK for temporary testing but a socket would be
nice.

Thanks
Chris --Chris
http://www.rocklizard.org
<myname>@rocklizard.org
myname = chris

12x2 LCD displays & serial LCD
interface chips available.
Visit http://pic.rocklizard.org

-----Original Message-----
From: upand_at_them [mailto:upand_at_them@upan...]
Sent: Monday, April 11, 2005 9:12 AM
To: piclist@picl...
Subject: [piclist] Re: MMC/SD
Googling "pic mmc" returns a very good example as the first result:

http://www.captain.at/electronics/pic-mmc/

This is what I used to get started. And it's about all you'll need to get a
PIC working with an MMC. It even has the code. If you want to write FAT
files to the card (I do) then you'll also need to read the FAT spec from
Microsoft:
http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx

Mike --- In piclist@picl..., a m <ali_2331@y...> wrote:
> i want to use mmc with pic but i have no information obout the mmc .
> can you help me?
> send me some info .
> thanks alot
to unsubscribe, go to http://www.yahoogroups.com and follow the instructions

Yahoo! Groups Links


Digikey carries several different card holders, including SD & MMC.

Chris wrote:

> Interesting web site! This looks like a simple to implement system. Now,
> does anyone know of a source for MMC connectors? I'd like to try this code
> out but I don't want to permanently attach (solder) an MMC card to a circuit
> board. Clip leads might be OK for temporary testing but a socket would be
> nice.
>
> Thanks
> Chris > --Chris
> http://www.rocklizard.org
> <myname>@rocklizard.org
> myname = chris
>
> 12x2 LCD displays & serial LCD
> interface chips available.
> Visit http://pic.rocklizard.org
>
> -----Original Message-----
> From: upand_at_them [mailto:upand_at_them@upan...]
> Sent: Monday, April 11, 2005 9:12 AM
> To: piclist@picl...
> Subject: [piclist] Re: MMC/SD >
> Googling "pic mmc" returns a very good example as the first result:
>
> http://www.captain.at/electronics/pic-mmc/
>
> This is what I used to get started. And it's about all you'll need to get a
> PIC working with an MMC. It even has the code. If you want to write FAT
> files to the card (I do) then you'll also need to read the FAT spec from
> Microsoft:
> http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx
>
> Mike > --- In piclist@picl..., a m <ali_2331@y...> wrote:
>
>>i want to use mmc with pic but i have no information obout the mmc .
>>can you help me?
>>send me some info .
>>thanks alot >
>
> to unsubscribe, go to http://www.yahoogroups.com and follow the instructions
>
> Yahoo! Groups Links >
>
> to unsubscribe, go to http://www.yahoogroups.com and follow the instructions
> Yahoo! Groups Links >
>




Chris,

The connector I'm using is from Mouser and it accepts both MMC and
SD. It's a nice one with a spring loaded eject. Spark Fun also
carries ones without the spring.

Mike --- In piclist@picl..., "Chris" <ChrisEGroup@r...> wrote:
> Interesting web site! This looks like a simple to implement system.
Now,
> does anyone know of a source for MMC connectors? I'd like to try
this code
> out but I don't want to permanently attach (solder) an MMC card to
a circuit
> board. Clip leads might be OK for temporary testing but a socket
would be
> nice.
>
> Thanks
> Chris > --Chris
> http://www.rocklizard.org
> <myname>@rocklizard.org
> myname = chris
>
> 12x2 LCD displays & serial LCD
> interface chips available.
> Visit http://pic.rocklizard.org
>
> -----Original Message-----
> From: upand_at_them [mailto:upand_at_them@y...]
> Sent: Monday, April 11, 2005 9:12 AM
> To: piclist@picl...
> Subject: [piclist] Re: MMC/SD >
> Googling "pic mmc" returns a very good example as the first result:
>
> http://www.captain.at/electronics/pic-mmc/
>
> This is what I used to get started. And it's about all you'll need
to get a
> PIC working with an MMC. It even has the code. If you want to
write FAT
> files to the card (I do) then you'll also need to read the FAT spec
from
> Microsoft:
> http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx
>
> Mike > --- In piclist@picl..., a m <ali_2331@y...> wrote:
> > i want to use mmc with pic but i have no information obout the
mmc .
> > can you help me?
> > send me some info .
> > thanks alot >
> to unsubscribe, go to http://www.yahoogroups.com and follow the
instructions
>
> Yahoo! Groups Links