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SD card MMC, CF card reading

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tobyhuang

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Hi
Does anyone know how to read /write Flash memory cards, such as
SD , MMC and CF?
does every flash memory card have its own FAT16 or FAT32 like IDE Hard Drive?
 

**broken link removed**

There are 2 (maybemore )code examples on how to do this
 

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    tobyhuang

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Thanks for your info. it'll be better if there are more documents other than programming codes.
trend said:
h**p://www.edtp.com/downloads.htm

There are 2 (maybemore )code examples on how to do this
Click to expand...
 

I suggest you read Microsoft's FAT document.
 

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    tobyhuang

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Flash is organized by page,block.
 

Hi,
bascially, you need to use SPI bus to access to SD/MMC.
 

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    tobyhuang

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**broken link removed**

Also search for the Compact Flash spec.
 

Hi ,
You can do read / write by sending the LBA of sector (Page) through the protocol which the Flash media can understand . For CFC flash spec can be downloaded from www.t10.org , which follows ATA protocol .
For the FAT concepts see the below link for basics ,
www.pjrc.com/tech/8051/ide/fat32.html
 

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