How To Read Chunk Character Using Fat FS, in My file 6 Lakh Character

[AJeth.2]

how to read 600 K(6 Lakh ) and more character at a time using Fat FS Micro SD Card , my File store in SD Card in File more then 6 Lakh Character is there , If any other way to read please help me , thanks in advance

[Tesla DeLorean]

You break the task into smaller bite size pieces you can manage.

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For text files and things with inconsistent sizing you'll need to buffer slightly differently and use thought and skill. The "Read Everything" method is not one that scales well.

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T​ry implementing on a PC using fopen, fread, etc it will be easier to work through the logic.

[AJeth.2]

Thank you for your answer

[Tesla DeLorean]

For FatFs you can use f_size to determine a file length, vs fseek,ftell in usual C implementations.

If you have a 32KB buffer, do alternating f_read/f_write to copy the content of one file to another, for example

[AJeth.2]

Yes i checked the File length using ​ f_size in my file 650000 length, when i am read the file using f_read then hard fault error is there. Buffer data type is BYTE.

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I need the whole file character in one buffer,i mean 650000 character.​

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