Improve arduino_pong.ino using enum to handle game statuses and switch case for better readibility and little memory improvements

src/pong_ball.cpp

@@ -33,7 +33,7 @@ void point_scored(int &ball_x, int &ball_y, int &ball_delay, int players_scores[
   ball_delay= INITIAL_BALL_DELAY;
 }
 
-bool move_ball(int &ball_x, int &ball_y, int &ball_delay, int players_coords[2], int players_scores[2], int &need_refresh) {
+bool move_ball(int &ball_x, int &ball_y, int &ball_delay, int players_coords[2], int players_scores[2]) {
   if (ball_x < 0 || ball_x > MATRIX_WIDTH-1 || ball_y < 0 || ball_y > MATRIX_HEIGHT-1) {
     // ball out of matrix limits
     ball_x= BALL_RESET_X;
@@ -41,7 +41,6 @@ bool move_ball(int &ball_x, int &ball_y, int &ball_delay, int players_coords[2],
     return false;
   }
 
-  need_refresh= 1;
   bool scored= false;
   
   // if ball is not moving, get random direction

src/pong_ball.h

@@ -1,6 +1,6 @@
 #ifndef PONG_BALL_H
 #define PONG_BALL_H
 
-bool move_ball(int &ball_x, int &ball_y, int &loop_delay, int players_coords[2], int players_scores[2], int &need_refresh);
-
+bool move_ball(int &ball_x, int &ball_y, int &loop_delay, int players_coords[2], int players_scores[2]);
+void foo(); 
 #endif

src/pong_player.cpp

@@ -13,21 +13,21 @@ int ball_player_collision(int player, int ball_y) {
 int pong_move_p1(int &p1_start, int &need_refresh) {
   if (digitalRead(P1_BTN_UP) == LOW && p1_start > 0) {
     p1_start -= 1;
-    need_refresh= 1;
+    need_refresh= true;
   }
   else if (digitalRead(P1_BTN_BOTTOM) == LOW && p1_start < 5) {
     p1_start += 1;
-    need_refresh= 1;
+    need_refresh= true;
   }
 }
 
 int pong_move_p2(int &p2_start, int &need_refresh) {
   if (digitalRead(P2_BTN_UP) == LOW && p2_start > 0) {
     p2_start -= 1;
-    need_refresh= 1;
+    need_refresh= true;
   }
   else if (digitalRead(P2_BTN_BOTTOM) == LOW && p2_start < 5) {
     p2_start += 1;
-    need_refresh= 1;
+    need_refresh= true;
   }
 }