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 ?

[Turbo J]

Without looking at SD_card_write_string_in_file(), my guess is: Stack overflow.

Why didn't you post the function that actually fails?

[Woody Hung]

static void write_data_to_sd_card_and_determine_file(	uint8_t *data_array,
																											uint16_t data_array_index)
{
	bool file_size_determine;

	file_size_determine = SD_card_for_file_size(data_array_index, file_name, testcount);

	SD_card_write_string_in_file(data_array, data_array_index, file_name);
	
	testcount++;
}


void SD_card_write_string_in_file(uint8_t* string, size_t string_size, uint8_t* file_name_array)
{
	  static FIL file;

    uint32_t bytes_written;
    FRESULT ff_result;
	
		NRF_LOG_INFO("Writing to file %s ...", file_name_array);
		ff_result = f_open(&file, file_name_array, FA_READ | FA_WRITE | FA_OPEN_APPEND);
		if (ff_result != FR_OK)
		{
			    NRF_LOG_INFO("ff_result: %d .",ff_result);
				NRF_LOG_INFO("Unable to open or create file: %s .", file_name_array);
				return;
		}

		ff_result = f_write(&file, string, string_size, (UINT *) &bytes_written);
		if (ff_result != FR_OK)
		{
				NRF_LOG_INFO("Write failed\r\n.");
		} 
		else
		{
				NRF_LOG_INFO("%d bytes written.", bytes_written);
		}
		 (void) f_close(&file);
}

Error message :

I added line is 25.

[Turbo J]

Error stil is in code not shown. I'm out.

[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.