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MMC in Comp.Arch.Embedded

Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.

We found 69 threads matching "MMC"

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about mmc device controller
0

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 ...about mmc device controller

Atmega16 and MMC
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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? ...Atmega16 and MMC

SD / MMC on AT91SAM7S256
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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 ...SD / MMC on AT91SAM7S256

using mmc for voice recording
-1

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...using mmc for voice recording

MMC specification
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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...MMC specification

Writing data to a sector of MMC card
0

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...Writing data to a sector of MMC card

MMC cards, who created the standard behind them (if any)
0

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 ...MMC cards, who created the standard behind them (if any)

Where may I get a copy of MMC specification?
0

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 ...Where may I get a copy of MMC specification?

Re: Need a SD (memory card) controller chip.
0

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...Re: Need a SD (memory card) controller chip.

miniSD, SD, MMC : some new questions
0

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...miniSD, SD, MMC : some new questions

MMC LCD Interfacing in ATMega16
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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. ...MMC LCD Interfacing in ATMega16

SD/MMC Diagnostics
0

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 Diagnostics

SD/MMC card driver for LPC2378
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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 ...SD/MMC card driver for LPC2378

Temporizzazioni MMC
0

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 ...Temporizzazioni MMC

MP3 files on MMC
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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...MP3 files on MMC

MMC stream write rate
0

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 ...MMC stream write rate

SD-MMC writing FAT
0

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...SD-MMC writing FAT

FAT16/32 system on a MMC card
+1

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! ...FAT16/32 system on a MMC card

SD / MMC - extension kit ?
0

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...SD / MMC - extension kit ?

Migrating from MMC to SD card
0

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...Migrating from MMC to SD card

Embedded Filesystems Library problem...
0

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...Embedded Filesystems Library problem...

File system requirements for SD and MMC cards?
0

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 ...File system requirements for SD and MMC cards?

SD Card License question
0

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 ...SD Card License question

What NAND flash do people use?
0

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...What NAND flash do people use?

MMC timings and write speed
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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 ...MMC timings and write speed

ARM PL180 SD/MMC controller Help
-1

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...ARM PL180 SD/MMC controller Help

sdcard access problem to lpc2378
-1

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...sdcard access problem to lpc2378

File systems on SD card details.
-1

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. ...File systems on SD card details.

3.3v <> 5v interfacing @ 15Mhz
0

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,...3.3v <> 5v interfacing @ 15Mhz

Problems with mmcm kingston 2gb
-1

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...Problems with mmcm kingston 2gb

RS232 to Flash logger
0

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....RS232 to Flash logger

AT91RM9200 - problem with SD/MMC
0

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...AT91RM9200 - problem with SD/MMC

Writing few bytes to MMC
0

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. /*-----...Writing few bytes to MMC

AT91RM9200_EK
0

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...AT91RM9200_EK

[EE] GPS logger with voice recording - Wear balancing for SD/MMC card needed?
-1

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...[EE] GPS logger with voice recording -  Wear balancing for SD/MMC card needed?

Floppy drive to Memory card Interface
0

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...Floppy drive to Memory card Interface

SD Card woes
0

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 ...SD Card woes

image/sensor data routing and saving?
0

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...image/sensor data routing and saving?

64MB SPI flash RAM?
0

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 ...64MB SPI flash RAM?

Simple Still Camera components?
0

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...Simple Still Camera components?
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