[FL-1984, FL-2004, FL-2010] USB CDC Fixes (#801)

* [FL-1984, FL-2004] USB-UART Fixes, test with high timer task priority
* added forgotten file
* switch from EventFlags to ThreadFlags
* [FL-1984, FL-2010] USB-UART and furi-hal-vcp rework
* Scripts: modernize string formatting.

Co-authored-by: あく <alleteam@gmail.com>

2 files changed, 39 insertions, 1 deletions

diff --git a/applications/gui/modules/variable-item-list.c b/applications/gui/modules/variable-item-list.c
index 800e0602..03f04cb6 100755..100644
--- a/applications/gui/modules/variable-item-list.c
+++ b/applications/gui/modules/variable-item-list.c
@@ -84,6 +84,40 @@ static void variable_item_list_draw_callback(Canvas* canvas, void* _model) {
     elements_scrollbar(canvas, model->position, VariableItemArray_size(model->items));
 }
 
+void variable_item_list_set_selected_item(VariableItemList* variable_item_list, uint8_t index) {
+    with_view_model(
+        variable_item_list->view, (VariableItemListModel * model) {
+            uint8_t position = index;
+            if(position >= VariableItemArray_size(model->items)) {
+                position = 0;
+            }
+
+            model->position = position;
+            model->window_position = position;
+
+            if(model->window_position > 0) {
+                model->window_position -= 1;
+            }
+
+            if(VariableItemArray_size(model->items) <= 4) {
+                model->window_position = 0;
+            } else {
+                if(model->window_position >= (VariableItemArray_size(model->items) - 4)) {
+                    model->window_position = (VariableItemArray_size(model->items) - 4);
+                }
+            }
+
+            return true;
+        });
+}
+
+uint8_t variable_item_list_get_selected_item_index(VariableItemList* variable_item_list) {
+    VariableItemListModel* model = view_get_model(variable_item_list->view);
+    uint8_t idx = model->position;
+    view_commit_model(variable_item_list->view, false);
+    return idx;
+}
+
 static bool variable_item_list_input_callback(InputEvent* event, void* context) {
     VariableItemList* variable_item_list = context;
     furi_assert(variable_item_list);
@@ -323,4 +357,4 @@ uint8_t variable_item_get_current_value_index(VariableItem* item) {
 
 void* variable_item_get_context(VariableItem* item) {
     return item->context;
-}
\ No newline at end of file
+}
diff --git a/applications/gui/modules/variable-item-list.h b/applications/gui/modules/variable-item-list.h
index e1e3cbf7..b67a02e6 100755
--- a/applications/gui/modules/variable-item-list.h
+++ b/applications/gui/modules/variable-item-list.h
@@ -70,6 +70,10 @@ void variable_item_list_set_enter_callback(
     VariableItemListEnterCallback callback,
     void* context);
 
+void variable_item_list_set_selected_item(VariableItemList* variable_item_list, uint8_t index);
+
+uint8_t variable_item_list_get_selected_item_index(VariableItemList* variable_item_list);
+
 /** Set item current selected index
  *
  * @param      item                 VariableItem* instance