LPC1768: SD Card Interface Revision as of 10:33, 14 April 2016 by Explorer (Talk | contribs) (diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Objective:

In this tutorial we will discuss how to interface SD CARD with lpc1768 to read and write the fat32 files.

References

The original library can be downloaded from http://www.dharmanitech.com/ These libraries have been modified to provide the standard interfaces like File_Write/File_read and also supports multiple file access.

File Handling Functions

The below table shows the list of functions to access the sd card.
Refer fat32.c/fat32.h for more info.

Function	Description
FILE_Open	This functions opens the specified file in requested mode(READ/WRITE/APPEND).
FILE_Close	This functions closes the file and releases the memory used by the file.
FILE_Delete	This functions deletes the file from SD card.
FILE_GetCh	This functions reads a byte of data from the file, Once the End of File is reached it returns EOF(26)
FILE_PutCh	This functions writes a byte of data to the file, EOF(26) needs to be passed to mark the end of file and save it to SD card.
FILE_GetList	This functions traverses through the SD card and lists the available files with their size.
FILE_GetMemoryStatics	This functions calculates the total and free memory of the SD card. It takes upto 10secs(for 32GB) to calculate the memory statics depending on the size of CARD

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