loop() call yield() instead of vTaskDelay(1)

Author: hathach

cores/nRF5/main.cpp

@@ -52,7 +52,7 @@ static void loop_task(void* arg)
     #endif
 
     // To compatible with most code where loop is not rtos-aware
-    vTaskDelay(1); //taskYIELD();
+    taskYIELD(); // vTaskDelay(1);
   }
 }
 

cores/nRF5/rtos.h

@@ -53,10 +53,10 @@
 
 enum
 {
-  TASK_PRIO_LOWEST  = 0,
+  TASK_PRIO_LOWEST  = 0, // Idle task, should not be used
   TASK_PRIO_LOW     = 1,
-  TASK_PRIO_NORMAL  = 2,
-  TASK_PRIO_HIGH    = 3,
+  TASK_PRIO_NORMAL  = 2, // Loop, Timer Task
+  TASK_PRIO_HIGH    = 3, // Bluefruit Task
   TASK_PRIO_HIGHEST = 4,
 };