walking stickman is now also crawling

semestralka1/src/render/loop.cpp

@@ -4,6 +4,7 @@
 #include "background.h"
 #include "mbed.h"
 #include "player.h"
+#include "player_mask.h"
 #include <cstring>
 
 extern BufferedSerial serial_port;
@@ -17,19 +18,24 @@ static bool message_active = false;
 
 void draw_mask(const char *unused_filename, int shift, const char *text);
 
-static bool read_uart() {
+// Returns:
+// 0 = no change - walk1
+// 1 = normal redraw - walk2
+// 2 = button triggered - crawl1
+static int read_uart() {
   bool changed = false;
+  bool triggered = false;
 
   // cita spravu z uartu
   if (serial_port.readable()) {
     memset(rx_buffer, 0, sizeof(rx_buffer));
     ssize_t num = serial_port.read(rx_buffer, sizeof(rx_buffer) - 1);
     if (num > 0) {
-      // toogle ledky
-      led = !led;
+      led = !led; // toogle ledky
       strncpy(message, rx_buffer, sizeof(message) - 1);
       message_active = true;
       changed = true;
+      triggered = true;
     }
   }
 
@@ -49,11 +55,15 @@ static bool read_uart() {
     changed = true;
   }
 
-  return changed;
+  if (triggered)
+    return 2; // LED toggled press
+  if (changed)
+    return 1;
+  return 0;
 }
 
 static bool update_animation(Timer &anim_timer, int &shift, int speed) {
-  if (anim_timer.elapsed_time() >= 200ms) {
+  if (anim_timer.elapsed_time() >= 170ms) {
     // speed determines scroll steps per tick
     shift += speed;
     anim_timer.reset();
@@ -75,17 +85,28 @@ void render_loop(int speed) {
   while (true) {
     need_redraw = false;
 
-    if (read_uart()) {
-      need_redraw = true;
-    }
+    int uart_state = read_uart(); // returns 0/1/2
+    if (uart_state == 1)
+        need_redraw = true;
+
+    bool triggered = (uart_state == 2);
 
     if (update_animation(anim_timer, shift, speed))
       need_redraw = true;
 
-    if (need_redraw) {
-      draw_mask(bg_file, shift, message_active ? message : nullptr);
-      draw_player(18, 16);
-      ThisThread::sleep_for(50ms);
+    if (need_redraw || triggered) {
+        draw_mask(bg_file, shift, message_active ? message : nullptr);
+
+        static int frame = 0;
+        if (triggered) {
+            // Display triggered frame once
+            draw_player(18, 13, 2);
+        } else {
+            draw_player(18, 13, frame);
+            frame = (frame + 1) % 2; // alternate between frame 0 and 1
+        }
+
+        ThisThread::sleep_for(50ms);
     }
 
     ThisThread::sleep_for(25ms);