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interface with mmc/sd card

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ramina

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Hi,
Currently i am doing an project with mmc/sd card in 8051.I wrote the SPIcode which is working.Now i have start with mmc/sd card .As a beginner i need to know the details about the mmc card.Any help.
 

MMC or SD card? Are you storing data from outside and just reading data from it. understand the file system of the device you are storing. and how do you read from controller, and what speed ( if it is audio file, which format you are storing and what is the bit rate or sampling rate in your program. also check if 8051 would support in case you need to play audio).
 
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    ramina

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Can we store only mp3 file or any data.I want to know from the basics.
 

You can store any kind of data. MP3, wav, audio files, or text messages, or anything. It is the same SD / MMC card you use in your mobile to store files.
The file system is fat 16 usually or fat 32.
You want to know theoretical basics or interfacing and project info. based on that document sharing / any referal will be easy.
1st step goole the difference between SD card and MMC card, How they work, how they store files.
Meanwhile i will also post some docs at the end of te day
 
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    ramina

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thank you,I will go through the differences .
 

it is for pic controller.I need for 8051.Any materials available.
 

which hardware and IC are you using. Could you dig into the information. Did you get the idea for this, or need more ideas. where are you struck now
 

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i need more ideas.I only know that i need to interface a mmc/sd card to 8051 .Can u give me more information.
 

which kit which IC, Does it support SPI internally, i need some more info. you want circuit of it and explaination or you will develop yourself
 
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    ramina

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I am using at89c51 IC,i wrote the code for SPI and it is working fine.No inbulit SPI .What is the next step.
 


Yeah i just googled it, downloaded the pdf, read it and then pasted the link. I think that is the why u learn things and help others. Even examples and codes from big companies (microchip) have errors. The trick is to read the examples and the code carefully and then modify it to suit ur needs.
 

waseem said:
Even examples and codes from big companies (microchip) have errors.
Click to expand...

I never came across like that from big companies till today because they do debug and test release before commercialising it on their website.

But this is not a place to argue , anyhow if it works then its good. As you said everybody have to do home work, all of us are not here to give complete solution and spoon feed people.
i agree with you
 

I am and was into this profession of teaching and have trained 5000+ candidates till date, but even today whenever i am free, i give corporate training across the globe. working in MNC from past many years. i am into embedded field from 10 + yrs, i dont not trust wikipedia for most of the content, as we refer only the data sheets given from companies / manufacturers, and lot of review and process is done in almost all the companies before publishing into their respective website.
I gave my comments, you may disagree with some, but we are all here for helping others with all our experience.
 
can u help with mmc card interfacing with pic16f877a
 

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