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RT-Thread DFS

2017-01-04 16:18:40   0  举报

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RT-Thread DFS（Dynamic Frequency Scaling）是实时操作系统RT-Thread中的一种动态频率调整技术。它可以根据系统负载的变化，自动调整处理器的运行频率，以实现性能与功耗之间的平衡。通过DFS技术，RT-Thread能够根据实际需求灵活地调整处理器的工作频率，从而提高系统的响应速度和执行效率，同时降低功耗和热量产生。这使得RT-Thread在嵌入式设备、物联网应用等领域具有广泛的应用前景。总之，RT-Thread DFS是一种高效、智能的动态频率调整技术，有助于提高系统性能并降低功耗。

作者其他创作

大纲/内容

dfs_file_ops

DIR

FIL

\tFATFS*\tfs;\t\t\t\t/* Pointer to the owner file system object */\tWORD\tid;\t\t\t\t/* Owner file system mount ID */\tBYTE\tflag;\t\t\t/* File status flags */\tBYTE\tpad1;\tDWORD\tfptr;\t\t\t/* File read/write pointer (0 on file open) */\tDWORD\tfsize;\t\t\t/* File size */\tDWORD\tsclust;\t\t\t/* File start cluster (0 when fsize==0) */\tDWORD\tclust;\t\t\t/* Current cluster */\tDWORD\tdsect;\t\t\t/* Current data sector */#if !_FS_READONLY\tDWORD\tdir_sect;\t\t/* Sector containing the directory entry */\tBYTE*\tdir_ptr;\t\t/* Ponter to the directory entry in the window */#endif#if _USE_FASTSEEK\tDWORD*\tcltbl;\t\t\t/* Pointer to the cluster link map table (null on file open) */#endif#if _FS_SHARE\tUINT\tlockid;\t\t\t/* File lock ID (index of file semaphore table) */#endif#if !_FS_TINY\tBYTE\tbuf[_MAX_SS];\t/* File data read/write buffer */#endif

dfs_fd

uint16_t magicuint16_t typechar *pathint ref_countconst struct dfs_file_ops *fopsuint32_t flagssize_t sizeoff_t posvoid *data

dfs_filesystem

rt_device_t dev_idchar *pathconst struct dfs_filesystem_ops *opsvoid *data

dfs_filesystem_ops

char *nameuint32_t flagsconst struct dfs_file_ops *fops

FATFS