games/snake: Fix terminal issue after returning back from snake game

games/snake/snake_input_console.h

@@ -25,6 +25,7 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
+#include <nuttx/ascii.h>
 #include <termios.h>
 
 #include "snake_inputs.h"
@@ -147,6 +148,27 @@ int dev_input_init(FAR struct input_state_s *dev)
   return OK;
 }
 
+/****************************************************************************
+ * Name: dev_input_deinit
+ *
+ * Description:
+ *   Deinitialize input method.
+ *
+ * Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   Zero (OK)
+ *
+ ****************************************************************************/
+
+int dev_input_deinit(void)
+{
+  reset_termios();
+
+  return OK;
+}
+
 /****************************************************************************
  * Name: dev_read_input
  *
@@ -167,24 +189,24 @@ int dev_read_input(FAR struct input_state_s *dev)
 
   /* Arrows keys return three bytes: 27 91 [65-68] */
 
-  if ((ch = getch()) == 27)
+  if ((ch = getch()) == ASCII_ESC)
     {
-      if ((ch = getch()) == 91)
+      if ((ch = getch()) == ASCII_LBRACKET)
         {
           ch = getch();
-          if (ch == 65)
+          if (ch == ASCII_A)
             {
               dev->dir = DIR_UP;
             }
-          else if (ch == 66)
+          else if (ch == ASCII_B)
             {
               dev->dir = DIR_DOWN;
             }
-          else if (ch == 67)
+          else if (ch == ASCII_C)
             {
               dev->dir = DIR_RIGHT;
             }
-          else if (ch == 68)
+          else if (ch == ASCII_D)
             {
               dev->dir = DIR_LEFT;
             }

games/snake/snake_input_gpio.h

@@ -116,6 +116,25 @@ int dev_input_init(FAR struct input_state_s *dev)
   return OK;
 }
 
+/****************************************************************************
+ * Name: dev_input_deinit
+ *
+ * Description:
+ *   Deinitialize input method.
+ *
+ * Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   Zero (OK)
+ *
+ ****************************************************************************/
+
+int dev_input_deinit(void)
+{
+  return OK;
+}
+
 /****************************************************************************
  * Name: dev_read_input
  *

games/snake/snake_main.c

@@ -737,5 +737,6 @@ int main(int argc, FAR char *argv[])
       goto restart;
     }
 
+  dev_input_deinit();
   return 0;
 }