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f_read 函数[通俗易懂]
2022-06-25 15:36:00 【全栈程序员站长】
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f_read函数声明如下: [cpp] view plain copy FRESULT f_read ( FIL* fp, /* [IN] File object */ void* buff, /* [OUT] Buffer to store read data */ UINT btr, /* [IN] Number of bytes to read */ UINT* br /* [OUT] Number of bytes read */ ); btr是用户要读的数据量,br是实际读取的数据量,这样当判断到br==0时,文件读完。
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