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MMC FAT Only Read

 
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Massimo



Joined: 02 Mar 2008
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MMC FAT Only Read
PostPosted: Sun Mar 02, 2008 2:17 pm     Reply with quote
I have read that it's possible to use the MMC with the PIC, but the problem is the FAT, you can write a file (eg 10kb) with the PC on MMC and read it sequentially from the pic byte per byte? Or it must to use the 512b blocks ?
Douglas Kennedy



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PostPosted: Sun Mar 02, 2008 8:40 pm     Reply with quote
The requirement of a 512 block size only applies to write.
asmallri



Joined: 12 Aug 2004
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PostPosted: Sun Mar 02, 2008 10:36 pm     Reply with quote
It also applies to the new high density SD/MMC cards for read.
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Last edited by asmallri on Tue Mar 04, 2008 7:40 am; edited 1 time in total
Pret



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PostPosted: Mon Mar 03, 2008 12:42 am     Reply with quote
The answer is Yes. Most FAT drivers can access files at byte level, even though the driver is using 512byte sized buffer. But of course, your PIC must have around 1k RAM, with FAT driver, MMM/SD driver, and your application...
Guest
PostPosted: Mon Mar 03, 2008 3:34 am     Reply with quote
Douglas Kennedy wrote:
The requirement of a 512 block size only applies to write.


You know how I can locate the file?
Pret



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PostPosted: Tue Mar 04, 2008 2:16 am     Reply with quote
Anonymous wrote:
You know how I can locate the file?

Using any FAT driver.... Rolling Eyes
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