[bsp] add led task to easy confirm kernel is running

bsp/lpc824/applications/application.c

@@ -16,11 +16,20 @@
 #include <board.h>
 #include <rtthread.h>
 
+#include "peri_driver.h"
+
+#define INIT_STACK_SIZE     512
+#define LED_STACK_SIZE      256
+
 #ifndef RT_USING_HEAP
 /* if there is not enable heap, we should use static thread and stack. */
 ALIGN(8)
-static rt_uint8_t init_stack[512];
+static rt_uint8_t init_stack[INIT_STACK_SIZE];
 static struct rt_thread init_thread;
+
+ALIGN(8)
+static rt_uint8_t led_stack[LED_STACK_SIZE];
+static struct rt_thread led_thread;
 #endif
 
 void rt_init_thread_entry(void* parameter)
@@ -31,6 +40,24 @@ void rt_init_thread_entry(void* parameter)
 #endif
     
 }
+
+void rt_led_thread_entry(void *parameter)
+{
+    /* Initialize GPIO */
+	Chip_GPIO_Init(LPC_GPIO_PORT);
+    Chip_GPIO_PinSetDIR(LPC_GPIO_PORT, 0, 7, 1);
+    Chip_GPIO_PinSetState(LPC_GPIO_PORT, 0, 7, true);
+    
+    while (1)
+    {
+        Chip_GPIO_PinSetState(LPC_GPIO_PORT, 0, 7, true);
+        rt_thread_delay(RT_TICK_PER_SECOND / 2);
+        
+        Chip_GPIO_PinSetState(LPC_GPIO_PORT, 0, 7, false);
+        rt_thread_delay(RT_TICK_PER_SECOND / 2);
+    }
+}
+
 int rt_application_init()
 {
     rt_thread_t tid;
@@ -38,7 +65,7 @@ int rt_application_init()
 #ifdef RT_USING_HEAP
     tid = rt_thread_create("init",
         rt_init_thread_entry, RT_NULL,
-        2048, RT_THREAD_PRIORITY_MAX/3, 20);
+        INIT_STACK_SIZE, RT_THREAD_PRIORITY_MAX/3, 20);
 #else
     {
         
@@ -52,6 +79,24 @@ int rt_application_init()
 #endif
     if (tid != RT_NULL)
         rt_thread_startup(tid);
+    
+#ifdef RT_USING_HEAP
+    tid = rt_thread_create("led",
+        rt_led_thread_entry, RT_NULL,
+        LED_STACK_SIZE, RT_THREAD_PRIORITY_MAX/3, 20);
+#else
+    {
+        
+        rt_err_t result;
+
+        tid = &led_thread;
+        result = rt_thread_init(tid, "led", rt_led_thread_entry, RT_NULL,
+                                led_stack, sizeof(led_stack), RT_THREAD_PRIORITY_MAX / 4, 20);
+        RT_ASSERT(result == RT_EOK);
+    }
+#endif
+    if (tid != RT_NULL)
+        rt_thread_startup(tid);
 
     return 0;
 }