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i've see the rtl manual,but can not find the fcreate function.does it means i need to create a file using FAT_16 ,but my os is windows xp,and the filesystem is fat32 which the rtl fs does not support.do a sd/mmc card reader need to format it in fat16 type and then new a blank file?
Currently you have to format SD/MMC to FAT16.
A file is created with fopen() function, you do not need to provide a blank file.