MMC SD LIB that handles more than 512 bytes per sector

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galea.dk
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MMC SD LIB that handles more than 512 bytes per sector

#1 Post by galea.dk » 30 Jan 2006 23:52

Using MMC SD cards with 256Mb formatted in FAT16 gives a sectorsize of 4096 bytes...

sdlib.ppas handles only 512 bytes per sector!

Will there be an upgrade (or sourcecode) included in next release?
(It is possible to do it using software and direct IO, but it would be nice to have in the build in library....)

Regards
an otherwise :lol: "happy" mikroe coder....
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anton
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#2 Post by anton » 31 Jan 2006 08:28

Higalea.dl,
Using MMC SD cards with 256Mb formatted in FAT16 gives a sectorsize of 4096 bytes...
I think you have it wrong. The cluster size is 4096 bytes. The sector size will be 512 bytes. Thus you can use this library.

Anton
Another proud user of LV 24-33A Development System and mikroPascal PRO for dsPIC :)
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galea.dk
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Cluster

#3 Post by galea.dk » 31 Jan 2006 13:12

And I thought I was smart.... (Won't jump the gun again! ;) )
Its just that I cant use 256Mb cards with the sd library? and the 3 different ones I have doesnt work!

Do you have a good explanation why it doesn't work with all type of cards??

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zristic
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Re: Cluster

#4 Post by zristic » 31 Jan 2006 20:16

Recently we realized that some mmc/sd cards have a boot sector. These cards fail to work with the library currently supplied with mikroPascal/mikroBasic/mikroC. However, we wrote an enhancement in the library, so it works fine will all cards now. The library will be released with the new versions of compilers as they pop out. mikroPascal is scheduled to be released in following 10 days.
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