Merge pull request #1428 from heyuanjie87/imx1050

添加mdelay接口

include/rtthread.h

@@ -149,6 +149,7 @@ rt_err_t rt_thread_delete(rt_thread_t thread);
 
 rt_err_t rt_thread_yield(void);
 rt_err_t rt_thread_delay(rt_tick_t tick);
+rt_err_t rt_thread_mdelay(rt_int32_t ms);
 rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg);
 rt_err_t rt_thread_suspend(rt_thread_t thread);
 rt_err_t rt_thread_resume(rt_thread_t thread);

src/thread.c

@@ -537,6 +537,23 @@ rt_err_t rt_thread_delay(rt_tick_t tick)
 }
 RTM_EXPORT(rt_thread_delay);
 
+/**
+ * This function will let current thread delay for some milliseconds.
+ *
+ * @param tick the delay time
+ *
+ * @return RT_EOK
+ */
+rt_err_t rt_thread_mdelay(rt_int32_t ms)
+{
+    rt_tick_t tick;
+
+    tick = rt_tick_from_millisecond(ms);
+
+    return rt_thread_sleep(tick);
+}
+RTM_EXPORT(rt_thread_mdelay);
+
 /**
  * This function will control thread behaviors according to control command.
  *