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tobyhuang
Joined: 29 Mar 2005
Posts: 8
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 03 Apr 2005 3:47 SD card MMC, CF card reading |
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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?
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trend
Joined: 14 Dec 2004
Posts: 86
Helped: 5
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03 Apr 2005 7:02 SD card MMC, CF card reading |
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http://www.edtp.com/downloads.htm
There are 2 (maybemore )code examples on how to do this
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Google
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03 Apr 2005 7:02 Ads |
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tobyhuang
Joined: 29 Mar 2005
Posts: 8
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03 Apr 2005 11:48 Re: SD card MMC, CF card reading |
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Thanks for your info. it'll be better if there are more documents other than programming codes.
| trend wrote: |
h**p://www.edtp.com/downloads.htm
There are 2 (maybemore )code examples on how to do this |
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solvall
Joined: 05 Apr 2005
Posts: 27
Helped: 9
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05 Apr 2005 3:06 Re: SD card MMC, CF card reading |
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| I suggest you read Microsoft's FAT document.
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zhangpengyu
Joined: 28 Jun 2004
Posts: 177
Helped: 2
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05 Apr 2005 14:30 SD card MMC, CF card reading |
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| Flash is organized by page,block.
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solvall
Joined: 05 Apr 2005
Posts: 27
Helped: 9
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12 Apr 2005 17:34 Re: SD card MMC, CF card reading |
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Hi,
bascially, you need to use SPI bus to access to SD/MMC.
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jdhar
Joined: 16 Aug 2004
Posts: 261
Helped: 13
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12 Apr 2005 23:53 SD card MMC, CF card reading |
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http://www.circuitcellar.com/echips-pdfs/0201/c0201mspdf.pdf
Also search for the Compact Flash spec.
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chandhramohan
Joined: 24 Mar 2005
Posts: 50
Helped: 6
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13 Apr 2005 13:50 Re: SD card MMC, CF card reading |
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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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