how to write on SD Card?

[doryme]

Hello
I want to make a program make TXT file on mmc card, and write on it. Any hints how to begin. Initialization?? Functions?? I made search but I didn't find useful results.

[Ttelmah]

fat.c

Big question is what hardware you have. Remember the card will be using 3.3v. If you have a 5v PIC, you _must_ have proper level translators. 90% of the problems you get here with people not being able to get the cards working, are with the voltage translation.
The second set of problems are with address handling. Fixes have been posted here for these.

Best Wishes

[temtronic]

Like T says...use a 3.3 volt PIC ! The couple of bucks spent now will save you days if not weeks of pain.NO need for the proper level translation chips,easier to wire up,simpler power supply,etc.
Just cut code and it works.If not ,then it's 100% CODE issue NOT hardware.
It's cheaper in the long run ,a better product and more reliable.

[doryme]

Hello
I use pic18f452 with 8MHz clock. about 3.3v, I use resistors for this purpose.
May you give me examples for 3.3v PIC?!
and still want to know, it is possible to make TXT file on mmc card?
thanks

[PCM programmer]

I have a question. Why does the title of your thread refer to an "SD card"
but inside the thread, you want information about an "MMC card". They
are not the same thing. Which one are you really using ?

[doryme]

I am using mmc card
but i think mmc card is a type of SD Cards .. seems that i was wrong

[arunb]

MMC card is different from SD card. The initialisation procedures for these are different.

The sdcard and mmc drivers provided in the PICC folder works well.

You could start by reading and writing data to the card first, this would also check your hardware, then move on to the FAT handler later.

What level translator are you using ??

[bkamen]

I used a sharpee marker.

To erase, I use rubbing alcohol.

(running away)
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D

[arunb]