esp8266/main: mp_builtin_open(): Implement, using vfs_proxy_call().

esp8266/main.c

@@ -123,8 +123,14 @@ mp_import_stat_t mp_import_stat(const char *path) {
     #endif
 }
 
+mp_obj_t vfs_proxy_call(qstr method_name, mp_uint_t n_args, const mp_obj_t *args);
 mp_obj_t mp_builtin_open(uint n_args, const mp_obj_t *args, mp_map_t *kwargs) {
+    #if MICROPY_VFS_FAT
+    // TODO: Handle kwargs!
+    return vfs_proxy_call(MP_QSTR_open, n_args, args);
+    #else
     return mp_const_none;
+    #endif
 }
 MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);
 

esp8266/moduos.c

@@ -72,7 +72,7 @@ STATIC mp_obj_t os_uname(void) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(os_uname_obj, os_uname);
 
 #if MICROPY_VFS_FAT
-STATIC mp_obj_t vfs_proxy_call(qstr method_name, mp_uint_t n_args, const mp_obj_t *args) {
+mp_obj_t vfs_proxy_call(qstr method_name, mp_uint_t n_args, const mp_obj_t *args) {
     if (MP_STATE_PORT(fs_user_mount)[0] == NULL) {
         nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(ENODEV)));
     }