When should lv_nand_flash_format be called?

[rabbitsaviola]

Hi,
I'm not sure whether it's a duplicate question. I find sample code demo_filex_nand_flash.c cannot work as ram disk is not formated before.

The sample code erases the ram disk in the beginning. But it's not formated by function lv_nand_flash_format. So lx_nand_flash_open would fail as no valid signature is found.

levelx/samples/demo_filex_nand_flash.c

Line 102 in 34616e2

_lx_nand_flash_simulator_erase_all();

Is it needed to call lv_nand_flash_format in the sample code?