lv_image_set_src() function
Set the image data to display on the object
Arguments
obj
pointer to an image object
src
1) pointer to an ::lv_image_dsc_t descriptor (converted by LVGL's image converter) (e.g. &my_img) or 2) path to an image file (e.g. "S:/dir/img.bin")or 3) a SYMBOL (e.g. LV_SYMBOL_OK)