Description: this procedure with 180 OK C code can read FAT16 file system drives the root directory, we can see the root directory under the file name, would show the first document, but the very stringent procedures, and there is no error handling, the U-poor compatibility, but for the simple test a post-mortem as a reference. this procedure can be supported by Windows FAT16 formatted U disk, because the procedure is streamlined and therefore only compatible with more than 50% of the U-brand, if chips were replaced CH375A compatibility can be increased to 85%, if the company's use of WCH Subroutine Library or an official version of the C source code compatibility better. Huan tests under the following U-pass : Lang Branch/Ultra Stable classic 64M/mini 128M/U160-64M Ultra Stable/Ultra Stable
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