pyrohaz
Member
Hey guys,
I've got the standard SD library working fine with the Maple. I read somewhere on the internet that I can completely avoid the FAT library by directly writing and reading from SD card sectors.
After accessing my 32mb SD card with a hex editor, I can see that the start of my text file is at sector 585 or offset 49200. Obviously an SD card can be accessed through SPI so what would be the simplest piece of code to initialize the SD card and access this sector of data?
Cheers,
gbulmer
Moderator
pyrohaz - "... so what would be the simplest piece of code to initialize the SD card and access this sector of data?"
I assume neither:
http://code.google.com/p/maple-sdfat/source/browse/trunk/maple-sdfat/examples/Arduino%20Examples/SdFatRead/SdFatRead.c
nor:
https://github.com/joeferner/maple-sdfat-gitclone/blob/master/maple-sdfat/examples/Arduino%20Examples/SdFatRead/SdFatRead.c
nor:
https://github.com/joeferner/maple-sdfat-gitclone/blob/master/maple-sdfat/examples/FileSys/FileSys.pde
is an adequate place to start.
So what are your needs that the library doesn't satisfy?
pyrohaz
Member
I am really appreciative of the Maple SD library, and I've used it in multiple situations, I was just using it as a kind of teaching task to really understand about how block and sectors on an SD card work, I feel that if I can understand the workings of the hardware, I can get a better and more efficient final solution!
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