interfacing SD/MMC card with AVR microcontroller

[akshay985]

i m try to interface SD/MMC card with AVR16 and coding it in codevisionavr only in SPI mode i m not writing FAT system can anyone tell me how to access sectors and generate sector address in codevisionavr

 

[ckshivaram]

Final code : MMC/SD Card interfacing : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

 

[hongphuc118]

i m try to interface SD/MMC card with AVR16 and coding it in codevisionavr only in SPI mode i m not writing FAT system can anyone tell me how to access sectors and generate sector address in codevisionavr

Can you send me your schematic?
I am a newbie and i want to learn about it

 

[ckshivaram]

here is the schematic.. the SPI lines are connected to port pins of controller if no dedicated pins are there in the controller......
**broken link removed**

 

[hongphuc118]

Oh.Do you use diode zener ?
What is the resistor value?

 

[bigdogguru]

Here's a MikroE MMC module board schematic which just uses voltage dividers:



SD Card interface for ATMEGA32

There are many different variation available.

Hope the info helps,

BigDog

 

[yeddy]

dear all,,

I use a compiler codevisonAVR 2.05, EMS SD/MMC/FRAM module and ATmega8535

how to make the program read the file .txt in MMC,,?