sd_card_read()

int sd_card_read	(	char *	buf,
		size_t *	size,
		struct fs_file_t *	f_seg_read_entry
	)

Read segment on the open file on the SD card.

Parameters

[out]	buf	Pointer to the buffer to write the read data into.
[in,out]	size	Number of bytes to be read from file. The actual read size will be returned. If the actual read size is 0, there will be a warning message which indicates that the file is empty.
[in,out]	f_seg_read_entry	Pointer to a file object. After call to this function, the pointer gets updated and can be used as entry in next function call.

Return values

0	on success.
-EPERM	SD card operation is not ongoing.
-ENODEV	SD init failed. SD likely not inserted.
Otherwise,error	from underlying drivers.