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Problems with SD Card Interfacing

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Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

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duncan

Sun Aug 03 2008, 07:08AM

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Hi.....
I'm currently working on a mp3 project using 8051 Microcontroller. I'm facing problems in interfacing the SD Card. I have no idea on how to INITIALIZE the SD Card using C Code.Can anyone help me up with this problem. I need some examples of C Code to write a SPI software to interface with 8051 ATMEL Microcontroller. Hope can get some examples or any info from you. Your help is much appreciated.

Ajay

Mon Aug 04 2008, 08:56AM

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Its better to use a controller with onchip SPI coz MMC can go upto 5Mhz clock. Select a controller i will help you initializing ur MMC

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luckynumber

Tue Aug 05 2008, 02:58AM

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Dear Ajay,

Sorry to tell you that I must use the 8051 micro controller for this projects. I know that this microcontroller does not have SPI on it. Can you guide me on the initialisation with this controller?

Ajay

Tue Aug 05 2008, 09:15AM

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sure lucky. you will be able to do it yourself soon.

Bitbanging SPI on 8051 i did not tested yet. but i think it would be better if you use a hardware one

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sashijoseph

Tue Aug 05 2008, 09:57AM

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Use a P89V51RD2 with hardware SPI and lots more...
A plain vanilla 8051 is not suitable for this project.

Let there be music........

shyam

Tue Aug 05 2008, 10:14PM

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i agree....

plus when u wud look for the controller to PC portability u will be needing extra RAM and Code memory as well!!

lProgress is not made by early risers or hard workers, but by LAZY people, trying to find easier ways to do the same........

nismo

Sun Aug 10 2008, 10:42AM

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What if i use AT89C51ED2. This microcontroller can interface a sd card in spi mode? can anyone help me?

microcontroller sd card interface

Ajay

Mon Aug 11 2008, 12:48AM

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ED2 best i say..

got for it..

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duncan

Fri Aug 29 2008, 06:35PM

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I'm attempting to interface to an SD card using an AT89C51ED2 in SPI mode. I have no idea how to set the SPI clock to 400kHz for SD initialization. Can anyone help me up with this problem?