remove rt_passed_second in clock; init device driver when driver has been opened if it is not in activate status; change interrupt nest count to rt_uint8_t; add rt_console_set_device function in kservice.c (rt_kprintf function can use device right now)

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@464 bbd45198-f89e-11dd-88c7-29a3b14d5316

src/clock.c

@@ -12,12 +12,12 @@
  * 2006-03-12     Bernard      first version
  * 2006-05-27     Bernard      add support for same priority thread schedule
  * 2006-08-10     Bernard      remove the last rt_schedule in rt_tick_increase
+ * 2010-03-08     Bernard      remove rt_passed_second
  */
 
 #include <rtthread.h>
 
 static rt_tick_t rt_tick;
-static rt_time_t rt_passed_second;
 
 extern void rt_timer_check(void);
 
@@ -29,7 +29,6 @@ extern void rt_timer_check(void);
 void rt_system_tick_init()
 {
 	rt_tick = 0;
-	rt_passed_second = 0;
 }
 
 /**
@@ -60,11 +59,6 @@ void rt_tick_increase()
 	/* increase the global tick */
 	++ rt_tick;
 
-	if (rt_tick % RT_TICK_PER_SECOND == 0)
-	{
-		++rt_passed_second;
-	}
-
 	/* check timer  */
 	rt_timer_check();
 

src/device.c

@@ -124,6 +124,22 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
 
 	result = RT_EOK;
 
+	/* if device is not initialized, initialize it. */
+	if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
+	{
+		result = dev->init(dev);
+		if (result != RT_EOK)
+		{
+			rt_kprintf("To initialize device:%s failed. The error code is %d\n",
+				dev->parent.name, result);
+			return result;
+		}
+		else
+		{
+			dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
+		}
+	}
+
 	/* device is a standalone device and opened */
 	if ((dev->flag & RT_DEVICE_FLAG_STANDALONE) &&
 		(dev->open_flag & RT_DEVICE_OFLAG_OPEN))

src/irq.c

@@ -24,7 +24,7 @@
 
 /*@{*/
 
-volatile rt_uint32_t rt_interrupt_nest;
+volatile rt_uint8_t rt_interrupt_nest;
 
 /**
  * This function will be invoked by BSP, when enter interrupt service routine

src/kservice.c

@@ -427,8 +427,6 @@ void rt_show_version()
 	rt_kprintf(" 2006 - 2009 Copyright by rt-thread team\n");
 }
 
-static char rt_log_buf[RT_CONSOLEBUF_SIZE]; /* Message log buffer */
-
 /* private function */
 #define isdigit(c)  ((unsigned)((c) - '0') < 10)
 
@@ -905,6 +903,51 @@ rt_int32_t rt_sprintf(char *buf ,const char *format,...)
 	return n;
 }
 
+static rt_device_t _console_device = RT_NULL;
+/**
+ * This function will set console to a device.
+ * After set a device to console, all output of rt_kprintf will be
+ * written to this device.
+ *
+ * @param device the new console device
+ *
+ * @return the old console device
+ */
+rt_device_t rt_console_set_device(const char* name)
+{
+	rt_device_t new, old;
+
+	/* save old device */
+	old = _console_device;
+
+	/* find new console device */
+	new = rt_device_find(name);
+	if (new != RT_NULL)
+	{
+		if (_console_device != RT_NULL)
+		{
+			/* close old console device */
+			rt_device_close(_console_device);
+		}
+
+		/* set new console device */
+		_console_device = new;
+		rt_device_open(_console_device, RT_DEVICE_OFLAG_RDWR);
+	}
+
+	return old;
+}
+
+#if defined(__GNUC__)
+void rt_hw_console_output(const char* str) __attribute__((weak))
+#elif defined(__CC_ARM)
+__weak void rt_hw_console_output(const char* str)
+#elif defined(__ICCARM__)
+__weak void rt_hw_console_output(const char* str)
+#endif
+{
+    /* empty console output */
+}
 
 /**
  * This function will print a formatted string on system console
@@ -914,10 +957,20 @@ rt_int32_t rt_sprintf(char *buf ,const char *format,...)
 void rt_kprintf(const char *fmt, ...)
 {
 	va_list args;
+	rt_size_t length;
+	static char rt_log_buf[RT_CONSOLEBUF_SIZE];
+
 	va_start(args, fmt);
 
-	vsnprintf(rt_log_buf, sizeof(rt_log_buf), fmt, args);
+	length = vsnprintf(rt_log_buf, sizeof(rt_log_buf), fmt, args);
+	if (_console_device == RT_NULL)
+	{
         rt_hw_console_output(rt_log_buf);
+	}
+	else
+	{
+		rt_device_write(_console_device, 0, rt_log_buf, length);
+	}
 
 	va_end(args);
 }