crawl for 300ms

semestralka1/src/render/loop.cpp

@@ -75,6 +75,8 @@ static bool update_animation(Timer &anim_timer, int &shift, int speed) {
 void render_loop(int speed) {
   Timer msg_timer;
   Timer anim_timer;
+  Timer crawl_timer;
+
   msg_timer.start();
   anim_timer.start();
 
@@ -82,6 +84,10 @@ void render_loop(int speed) {
   const char *bg_file = "background_dark_inverted.txt";
   bool need_redraw = false;
 
+  bool crawling = false; // are we in 1s crawl state?
+  bool crawl_timer_started = false;
+  const auto CRAWL_DURATION = 300ms;
+
   while (true) {
     need_redraw = false;
 
@@ -89,17 +95,31 @@ void render_loop(int speed) {
     if (uart_state == 1)
       need_redraw = true;
 
-    bool triggered = (uart_state == 2);
+    if (uart_state == 2) {
+      // start crawl frame for 1 second
+      crawling = true;
+      crawl_timer.reset();
+      crawl_timer.start();
+      crawl_timer_started = true;
+    }
+
+    // stop crawling after 1 second
+    if (crawling && crawl_timer_started &&
+        crawl_timer.elapsed_time() >= CRAWL_DURATION) {
+      crawling = false;
+      crawl_timer.stop();
+      crawl_timer_started = false;
+    }
 
     if (update_animation(anim_timer, shift, speed))
       need_redraw = true;
 
-    if (need_redraw || triggered) {
+    if (need_redraw || crawling) {
       draw_mask(bg_file, shift, message_active ? message : nullptr);
 
       static int frame = 0;
-        if (triggered) {
+      if (crawling) {
-            // Display triggered frame once
+        // Display crawl frame during 1s crawl state
         draw_player(18, 13, 2);
       } else {
         draw_player(18, 13, frame);