threads.c: Avoid reading keyboard status while display is rendering

openrtx/src/threads.c

@@ -137,6 +137,8 @@ static void kbd_task(void *arg)
     keyboard_t keys = 0;
 
     while(1)
+    {
+        if(!gfx_renderingInProgress())
         {
             // Get currently pressed keys
             keys = kbd_getKeys();
@@ -182,6 +184,7 @@ static void kbd_task(void *arg)
                 // Save current keyboard state as previous
                 prev_keys = keys;
             }
+        }
         // Read keyboard state at 20Hz
         OSTimeDlyHMSM(0u, 0u, 0u, 50u, OS_OPT_TIME_HMSM_STRICT, &os_err);
     }