Fixed crashing timers by increasing the default task's stack

Core/Src/freertos.c

@@ -52,7 +52,7 @@ typedef StaticSemaphore_t osStaticMutexDef_t;
 osThreadId_t defaultTaskHandle;
 const osThreadAttr_t defaultTask_attributes = {
   .name = "defaultTask",
-  .stack_size = 128 * 4,
+  .stack_size = 256 * 4,
   .priority = (osPriority_t) osPriorityNormal,
 };
 /* Definitions for uartMutex */