SD Card

Dasat · Joined: 07 Feb 2012 Posts: 5

Pls i am new to this, i want to read dat into my sd card using a PIC 18F4520
I'm not to sure if the syntaxes to use in initializing and sending information to the SD card, i have an MMC driver that I'm to use.
Pls i need help, don't mind my ignorance
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Believe and u would see

temtronic · Posted: Wed Feb 08, 2012 6:26 am

Rule number one. Be sure to use proper logic level conversion chip between the 5 volt PIC and the 3 volt SD card.

Unless you have the correct hardware, your program will never work.

Rule number two. Learn to use the 'search' function of this forum. There are dozens of 'SD card' related topics.99% of all the problems you have will already be answered !

Rule number three. Never forget rule #1 and rule #2 !!

Dasat · Joined: 07 Feb 2012 Posts: 5

Believe me I've done number 2 but didn't get the basics I need to start. I don't mind a book or a small tutorial. What i want to do is do an adc conversion: store the various for a number of samples in the card and the print it on a Nokia lcd screen. I can now work with the Nokia screen. But for the cards, I'm not sure of which functions to invoke first, how to view the result so far in my code, etc.
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arunb · Joined: 08 Sep 2003 Posts: 492 Location: India

Hi,

Study the CCS code examples in the PICC folder. See the various functions procedures used, the initialisation of the card is most important part without which the card will not work properly. The CCS code drivers have all the functions/procedures for reading and writing to the card.

Before all this get the hardware ready, as pointed out by temtronic, logic level conversion is very important here.

There are numerous projects in internet, just Google for it.

Please post the datasheet for the Nokia LCD screen...

thanks
a

asmallri · Joined: 12 Aug 2004 Posts: 1635 Location: Perth, Australia