From 9951d5cba0919e969f8b460ab11701aa9ed6fbea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8F=AA=E6=9C=89=E4=BD=A0=E4=BB=AC?= <815678396@qq.com>
Date: Fri, 26 Mar 2021 15:50:51 +0800
Subject: [PATCH] update
 rt-thread-version/rt-thread-standard/programming-manual/device/hwtimer/hwtimer.md.

---
 .../programming-manual/device/hwtimer/hwtimer.md             | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/hwtimer/hwtimer.md b/rt-thread-version/rt-thread-standard/programming-manual/device/hwtimer/hwtimer.md
index ee42eca..171dfa0 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/hwtimer/hwtimer.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/hwtimer/hwtimer.md
@@ -116,6 +116,8 @@ static int hwtimer_sample(int argc, char *argv[])
     rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
     /* 设置超时回调函数 */
     rt_device_set_rx_indicate(hw_dev, timeout_cb);
+    
+    return 0;
 }
 ```
 
@@ -189,6 +191,7 @@ static int hwtimer_sample(int argc, char *argv[])
     /* 设置模式为周期性定时器 */
     mode = HWTIMER_MODE_PERIOD;
     rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode);
+    return 0;
 }
 ```
 
@@ -253,6 +256,8 @@ static int hwtimer_sample(int argc, char *argv[])
     timeout_s.sec = 5;      /* 秒 */
     timeout_s.usec = 0;     /* 微秒 */
     rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s));
+    
+    return 0;
 }
 ```
 
-- 
Gitee