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Questions about the FATFS library

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inferno_nsit

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Hi,
I am implementing a mmc card reader using atmega 32.I am using the FATFS LIBRARY from
**broken link removed**
after reading the code i had some doubts

1.what does the xatoi() and xitoa() funtion do and what is meant by them connected with the UART module.

here is a sample run of the code
http://elm-chan.org/docs/mmc/sd128.txt
2.what do the 5 columns display in using the fw command.?

3.Where are we writin the commands ...is it on the hyperterrminal or any other interface?


Hope someone replies:D
 

mmc + fat + commands

I've sorted out my first query , please help me out on 2nd and 3rd one only
 

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