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about mmc device controller
budflora - 2008-04-24 07:36:00
Dear all,
I am studying mmc spec these days. And i'm trying to design a mmc device
controller, and want to integrate with a nand flash controller which has
been finished. of course, a processor is needed. i am wondering command
decoding and response handling and the implementation of MMC spec is ...
Atmega16 and MMC
Started by terry 9 years ago
In ATMega16, I want to ask how to use SPI with a MMC card.
I have seen that there are 4 pins in ATMega16 which implements SPI. They are
SS, MOSI, MISO, SCK.
For a MMC card, the 4 pin assignments are
1 CS
2 Din
5 SCK
7 Dout
Is the SS pin of ATmega16 connected to CS of MMC or else?
...SD / MMC on AT91SAM7S256
Peter Pippinger - 2007-08-21 17:24:00
Hello NG,
i have the SAM7-P256 DEV-Board from Olimex.
But if i open and compile the mmc demo - it doesn=B4t work.
http://www.olimex.com/dev/soft/arm/SAM7/MMC.zip
Is there something i have to change after downloading it?
Thanks for any help.
Regards,
Peter
...using mmc for voice recording
chimpi - 2008-12-17 06:35:00
hey folks,
i have been working on the construction of a voice recorder using memory
of MMC and ATmega 16 as the controller associated...i am using the MMC in
SPI mode... since the sampling rate of the data is quite high... so i dont
use any buffer memory before storing data to MMC, i keep the mmc...MMC specification
Started by Fonze 9 years ago
Hello,
I'me currently working on a embedded datalogger which writes data on a
MMC card.
the CPU is an MSP 430 from TI, communicating through SPI.
Does anyone have the complete MMC (multimedia card) specification?
Even version 2.2 would be sufficient for me...
I've looked for it a while, bu...Writing data to a sector of MMC card
Pelos @ Home - 2006-09-03 13:51:00
Hi,
I'm collecting and saving small amount of data (about 64 bytes) once per
5 minutes on MMC sector. I put my data into increment pointer in SRAM
memory, but I can't wait to fill 512B buffer. I have to save my data
(512B buffer) on each collected data due to power lost. If I fill 512B
SRAM...MMC cards, who created the standard behind them (if any)
Started by The Eighth Doctor 8 years ago
Hello from the Eighth Doctor
One of my staff, with my blessing, is investigating the possiblty of using CF, or
MMC cards for file storage on an embedded system project that he's designing.
I know, (vaguely), who invented the first CF card, and who started the standard
behind them. We've got ...Where may I get a copy of MMC specification?
Started by Kelvin @ SG 9 years ago
Hi, there:
Where may I get a MMC card specification? It seems mmca.org asks for $
in order to download the specs...but I don't want to pay that...
Kelvin
...Re: Need a SD (memory card) controller chip.
Started by Unknown 6 years ago
In article , Stef wrote:
> In comp.arch.embedded,
> Peter Dickerson wrote:
> > "Stef" wrote in message
> > news:893c$45794128$54f63171$29655@publishnet.news-service.com...
> > >
> > > I think you've got it backwards. SD car...miniSD, SD, MMC : some new questions
Kaushik - 2005-10-18 06:20:00
hi all,
i have gone through some of the questinos regarding miniSD, SD and MMC
on net. here is my set of questions:
1. what is terminal guard?( usually mentioned as a difference between
miniSD and SD)
2. does miniSD have write protection switch?
3. if no(to question 2), why is it called 'mini...MMC LCD Interfacing in ATMega16
techie.embedded@gmail.com - 2006-10-27 17:42:00
Hi
Can someone lead me to some tutorial or some sample codes to write data
into my MMC, read & display onto LCD. I'm using an ATMega16 MCU & my
compiler is WinAVR.
thanks heaps.
techie.
...SD/MMC Diagnostics
Ram - 2006-08-13 10:12:00
Hi,
Im trying to write a test for SD/MMC card on power up.
As soon as the board gets powered up - i want to test if SD/MMC card
is working fine.
How does one go about doing it?.
1) I am able to detect and initialise the card and read the Card
details like vendor id...
How ...SD/MMC card driver for LPC2378
Hima - 2008-04-04 14:01:00
Hi,
I´m trying to write a block-driver for mmc/sd cards on the LPC2378, using
the 4-bit mode.
Does anybody have some experience in writing such a driver and
is there any sample code available to use as a starting point?
Regards,
Hima
...Temporizzazioni MMC
Started by Haldo 8 years ago
Ciao a tutti!
Qualcuno ha un'idea delle temporizzazioni necessarie per le memorie MMC?
Mi spiego meglio, qualcuno conosce il transfer rate per una scrittura
continua su questi dispositivi? (riferendosi a una MMC "media" odierna,
da 512MBytes).
Vorrei realizzare un datalogger, che ...MP3 files on MMC
Started by kvpatel_2000 8 years ago
I am using Atmel AT8xC51SND1C and would like to read and write MP3 files t
MMC cards. Can any one point me to link or project that doing anythin
similar to this. I would like to use the finished code if possible.
This message was sent using the comp.arch.embedded web interface o
www.Em...MMC stream write rate
Started by Unknown 7 years ago
Dear All,
What's the max practical stream write rate on MMC card ?
Which brand is the fastest one ?
Kind regards,
Yuri
...SD-MMC writing FAT
Rocky - 2006-12-30 07:53:00
Hi All,
I am starting some work that would be using an SD card (in MMC-SPI
mode) and I was hoping to use a PIC or similar low memory chip.
The idea was to use Lewin Edward's DOSFS (www.zws.com) as it only
requires about 1KB RAM.
The problem is that according to the SANDISK spec one can do...FAT16/32 system on a MMC card
Started by terry 9 years ago
Hi,
Could anyone give me source code example to implement FAT16/32 file
system on a MMC card? I used Atmega32.
Thanks!
...SD / MMC - extension kit ?
Started by Martin Maurer 9 years ago
Hello,
can someone tell me if the following exists:
I want to test / debug / monitor a SD / MMC - card. Usually the SD card goes
completely into the slot. Is there some kind of extension, with some test
points for each pin, and perhaps again a SD connector for the real card. It
is a bit diffi...Migrating from MMC to SD card
Started by Stef 9 years ago
Hi all,
We currently have a (client's) product that uses an MMC (SPI mode) for
datastorage, the client would like to change this to SD card.
After searching the web, I did find the SD card simplified physical
layer spec, but not much else. The www.sdcard.org site keeps giving me
timeouts. I...Embedded Filesystems Library problem...
Pawel K - 2007-06-22 09:23:00
Hello,
I use EFSL v0.2.8 stable from http://efsl.be with ATMEGA 128.
I can mount FS, open & write/read file but i have 1 problem. First close
file, unmount fs, remove MMC from socket.
I put mmc in socket, initialise file system again and
my program freeze, what wrong?
--
--
Pozrdawia...File system requirements for SD and MMC cards?
Kaushik - 2005-10-13 01:31:00
Hi all,
I would like to use SD and MMC cards on an ARM evaluation board with
AMX os. What are the requirements that a file system should have to
support these devices? for eg:ECC calculation, Multivolume., etc. are
these any special features which they have to support?(for eg., to
support a ...SD Card License question
dom - 2007-11-18 07:10:00
Hello,
I'm thinking about adding a microSD Slot to a very tiny device.
The Problem is, that www.sdcard.org seems to charge a lot of "protection
money" if you implement anything with SD Cards that's going to be sold.
(something like $3000/year)
The device does not need ANY specific ...What NAND flash do people use?
Alan Nishioka - 2008-03-24 17:15:00
I am currently using an MMC/SD card that I want to replace with a chip
(for simplicity, no socket, price).
Is there any popular NAND flash device that I might replace it with?
I have found:
1. SST NANDrive: IDE interface, 128MB-8GB
2. ONFI (Hynix, Intel, Micron, ie. everybody but Samsung) NAN...MMC timings and write speed
Started by Haldo 8 years ago
Hi all!
I'm just beginning a new project which involves a PIC microcontroller
and a MultiMedia Card.
I was wondering which are the timings for these cards for a sustained
write. I need to store a data stream at 150KBytes/sec on the card, but I
can't figure out what the minimum write speed ...ARM PL180 SD/MMC controller Help
Umar Waqas - 2010-05-14 02:54:00
Hello,
I am porting ARM PL180 SD/MMC controller. Its is working fine in
initialization, Read OCR, CSD etc. It also reads the block fine. Its
write block works fine for some blocks but then i receive TX under run
error in the status register. I am using block write.
I have tried the followin...sdcard access problem to lpc2378
raveendran - 2008-09-02 08:00:00
Hi,
i am new to arm lpc2378 processor. i want access sdcard in lpc 2378
processor. i downloaded example code for version chaN 0.05/nxp 1.4/mt 0.3,
i am running this code and given command to processor- di 0 :command for
initialization of sdcard i am getting this output. pls help me what is the
pro...File systems on SD card details.
Started by Ted 8 years ago
Hello,
Id like to know more about filesystems on SD/MMC cards in detail.
Can anyone suggest the right procedure to learn how to access the SD
cards for storing retrieving information..
Thanks in advance.
...3.3v <> 5v interfacing @ 15Mhz
Alison - 2006-11-25 06:12:00
Hi,
Please may I ask for assistance? I need a reliable method of interfacing an
SPI SD/MMC card to a dsPIC. At the moment I'm using a 1k8/3k3 voltage
divider on the 5v ----> 3.3v signals, and connecting the 3.3v ----> 5v
signals straight to port.
It's working ok upto about 3-5Mhz,...Problems with mmcm kingston 2gb
engineer666 - 2008-01-16 08:59:00
Hi people,
anyone already worked with mmcm kingston ? im trying to put this working
several days, but i think that im losing this battle.
i sent the mmc commands but i havent response from memory... im using the
same circuit on proteus vsm and it works fine.
i need some help..
thanks in...RS232 to Flash logger
Started by Don 8 years ago
Hi All,
Anyone know of a readily available commercial product which can log
RS232 data & store it on a removable flash card i.e.. SD /MMC/ XD etc.
The instrument will be writing ASCII CSV strings.
I have a cct etc for an AVR but I need to buy a few in a hurry & just
have it work....AT91RM9200 - problem with SD/MMC
Pelos - 2007-01-25 04:06:00
Hi.
I have problem with transmission between ARM and MMC/SD on my board.
I tested with 16MB SD from Panasonic and 256MB Kingston MMC.
Here is my board http://twarm.pelos.pl/viewtopic.php?t=2
I use kernel 2.6.19 with patches from maxim.org.za
The connections are:
MMC CPU
8 -> PB3
7 -&g...Writing few bytes to MMC
zaheershamsi - 2007-07-30 07:10:00
Hi everybody!
Is it possible to write few bytes of data to MMC instead of writing a
block of 512 bytes. But remember I am asking it for SPI mode.
I know it is possible in Multimedia Card Mode but I am using SPI
protocol.
This is the code which I am following for writing single block.
/*-----...AT91RM9200_EK
layaghi - 2005-12-31 09:43:00
Hi
I have a AT91RM9200 evaluation kit (AT91RM9200_EK).
I want to know how could I use any devices other than DataFlash card for
booting the board and downloading the Win CE image?
when I say "any devices other than DataFlash card" I mean onboard parallel
flash or the MMC,SDcard and so o...[EE] GPS logger with voice recording - Wear balancing for SD/MMC card needed?
wzab - 2008-05-10 17:19:00
Hi All,
I'm just working on the open source GPS logger with voice recording (to
facilitate recording tracks for the http://www.openstreetmap.org project).
The current architecture includes:
GPS module - http://www.f-tech.com.tw/datasheet/GPS/FGPMMOPA2.pdf -
first tests show, that it perform...Floppy drive to Memory card Interface
Brian Fairchild - 2005-09-14 07:56:00
Has anyone come across a device which will allow you to replace a
standard PC 1.44Mb floppy drive with something which will take
CF/SD/MMC cards. It'll need to emulate a floppy drive as there is no
chance to rewrite the embedded systerms hardware.
I've found the Fuji FD-A2 but that seems to ne...SD Card woes
Peter Dickerson - 2007-09-02 08:07:00
I have a SD card connector attached to a Sharp LH75410 ARM processor via SPI
using the SSP hardware. This has been working for ~9 months with a variety
of SD and MMC cards. However, recently I have found a couple of SD cards
that don't seem to work. I don't mean they don't initialize but that ...image/sensor data routing and saving?
solarst - 2009-04-03 06:31:00
Lots of questions, I hope someone can guide me in the right direction!
I'm looking for some help in designing a system that can take data from an
image sensor and store it in some sort of MMC/flash memory. It will be
part of a wearable device for monitoring diet/activity constantly during
the da...64MB SPI flash RAM?
Started by David Linker 8 years ago
I am having trouble finding SPI flash RAM with capacities greater than 4
MB (64 Mb). I know that there are MMC cards with 64 MB (256 Mb)
capacities, that can easily be interfaced to SPI, but I would like to
find the RAM without the packaging.
Any pointers?
Thank you.
David Linker
...Simple Still Camera components?
amerdsp - 2007-07-29 22:31:00
Greetings,
I am trying to design and implement a very simple camera that would
capture VGA quality images and store them to flash memory such as SD
or MMC.
I am seeking the advice of the experienced people out there about
the recommendations for a microcontroller and image sensor
combinat...