FatFs question

[Woody Hung]

I used nRF5_SDK_14.1.0_1dda907.

I used fatfs example.

Wirted data in the same file to sd card.

I discoverd that Max size of the file is 16KB.

Over the max size of file, when i write data to sd card, will be failure.

Can i change the max size to one file, or no limit size ?

[Woody Hung]

I used 8GB sd card.

If there are two file in the sd card.

The one is 16KB.

Another is 14 KB.

If i write data to 14KB file, will be successful.

If i write data to 16KB file, will be failure.

[haakonsh]

I need to know how you have initialized the file system, do you have any code, tracelogs, or logs that you can share?

[haakonsh]

We need information that describes the problem, in detail.

[Woody Hung]

Excuse me!!

i posted no correct message

New error message :

I discovery the return value is FR_DISK_ERR.

[haakonsh]

What is the block size and block count of the disk?

[Woody Hung]

How do i know the block size and block count ?

thx.

[haakonsh]

Please forget the block count, it should be given by the SDCard library. 

If f_open returns 0x01 this means: FR_DISK_ERR,        /* (1) A hard error occurred in the low level disk I/O layer */

There's only two ways f_open can return FR_DISK_ERR and they are present in the lines 3407 to 3423 of ff.c in SDK15. I need you to debug these lines and figure out which of these two lines that sets res = FR_DISK_ERR. 

[Woody Hung]

The line is 3423.

if (disk_read(fs->drv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;

I discovered that :

In the disk_read(BYTE drv, BYTE *buff, DWORD sector, UINT count) function.

err_code = nrf_blk_dev_read_req(m_drives[drv].config.p_block_device, &req); 

The err_code is 0x11.

How to debug?