The FatFS example will help you to get familiar with filesystem and the ctrl access modules provided by the asf. It provides sample code of common operations of a filesystem through the abstraction memory based on ctrl access services. It can also help you to configure the filesystem according to your own needs, which can be used for fast implementation of your own filesystem and other applications related. FatFs is a generic file system module to implement the FAT file system to small embedded systems.
This package can be used with all MCU boards with Memory Control Access support. The conf_access.h used in the ctrl access module will determine the actually used memory device, e.g., the file system can be created in the internal RAM, NAND Flash and DataFlash (an AT45DBX needs to be connected) on SAM3X-EK/SAM3N-EK/ SAM3S-EK/SAM3U-EK/SAM4E-EK/SAM4S-EK/SAM4S-Xplained/ATxmega128A1-Xplained/ ATxmegaA3BU-Xplained/SAM4N-Xplained-Pro/SAM4CMP16C-SAM4CMP-DB/ SAM4CMS16C-SAM4CMS-DB/SAMV71-Xplained-Ultra/SAME70-Xplained. The file system is created in the Micro SD/MMC on IO1 extension board connected to SAM D/R/L Xplained Pro.
When launched, this program will check the existing file system on the abstraction layer of memory through the ctrl access service. The abstraction layer of memory can be configured by the conf_access.h. There are 2 cases:
Then a Basic.bin file will be created, written with a special pattern and closed. Finally the file will be reopened and its data will be verified.
-# Build the program and download it into the evaluation board. -# On the computer, open and configure a terminal application (e.g., HyperTerminal on Microsoft Windows) with these settings: - 115200 bauds (or 38400 bauds on SAM D/R/L Xplained Pro) - 8 bits of data - No parity - 1 stop bit - No flow control -# In the terminal window, the following text should appear (values depend on the board and the chip
used):