diff --git a/Hardware/led/led.c b/Hardware/led/led.c
new file mode 100644
index 0000000..a866326
--- /dev/null
+++ b/Hardware/led/led.c
@@ -0,0 +1,49 @@
+/**
+ * @file    led.c
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.11
+ * @brief   stm32f103x6 LED 库
+ */
+
+#include "sys.h"
+#include "systick.h"
+
+#include "led.h"
+
+/**
+  * @brief  LED 初始化
+  */
+void LED_Init(void)
+{
+    GPIO_InitTypeDef GPIO_Initure;
+    __HAL_RCC_GPIOC_CLK_ENABLE(); //开启 PA 时钟
+
+    GPIO_Initure.Pin = GPIO_PIN_13;            //PC13
+    GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP;   //推挽输出
+    GPIO_Initure.Pull = GPIO_PULLUP;           //上拉
+    GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH; //高速
+    HAL_GPIO_Init(GPIOC, &GPIO_Initure);       //初始化 PC13
+
+    LED1_Off;
+    SysTick_StartTimer(LED1_SYSTICK_TIMER_ID, 50);
+}
+
+/**
+  * @brief  LED1 慢速翻转，无阻塞，防止因调用过快导致无法观察
+  * @param  led_num: 序号
+  */
+void LED_Slow_Toggle(uint8_t led_num)
+{
+    switch (led_num)
+    {
+    case 1:
+    {
+        if (SysTick_CheckTimer(LED1_SYSTICK_TIMER_ID))
+        {
+            HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
+            SysTick_StartTimer(LED1_SYSTICK_TIMER_ID, 50);
+        }
+    }
+    }
+}
diff --git a/Hardware/led/led.h b/Hardware/led/led.h
new file mode 100644
index 0000000..4758da7
--- /dev/null
+++ b/Hardware/led/led.h
@@ -0,0 +1,26 @@
+/**
+ * @file    led.h
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.11
+ * @brief   stm32f103x6 LED 库
+ * @details 提供 LED 开、关、闪烁、慢速闪烁功能
+ * @note    LED1: PC13
+ */
+
+#ifndef _LED_H
+#define _LED_H
+
+#include "sys.h"
+
+#define LED1(n) (n ? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET) : HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET))
+#define LED1_On LED1(0)
+#define LED1_Off LED1(1)
+#define LED1_Toggle HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13) //LED1 翻转
+#define LED1_SYSTICK_TIMER_ID 0
+#define LED1_Slow_Toggle LED_Slow_Toggle(1) //LED1 慢速翻转，无阻塞，防止因调用过快导致无法观察
+
+void LED_Init(void);
+void LED_Slow_Toggle(uint8_t led_num);
+
+#endif
diff --git a/Project/MasterNode.uvprojx b/Project/MasterNode.uvprojx
index 6cc4919..4c60cb0 100644
--- a/Project/MasterNode.uvprojx
+++ b/Project/MasterNode.uvprojx
@@ -339,7 +339,7 @@
               <MiscControls></MiscControls>
               <Define>USE_HAL_DRIVER, STM32F103x6</Define>
               <Undefine></Undefine>
-              <IncludePath>..\Core;..\Libraries\HAL_Lib\Inc;..\User\Main;..\System\sys;..\System\systick;..\System\uart</IncludePath>
+              <IncludePath>..\Core;..\Libraries\HAL_Lib\Inc;..\User\Main;..\System\sys;..\System\systick;..\System\uart;..\Hardware\led</IncludePath>
             </VariousControls>
           </Cads>
           <Aads>
@@ -657,6 +657,13 @@
         </Group>
         <Group>
           <GroupName>Hardware</GroupName>
+          <Files>
+            <File>
+              <FileName>led.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\Hardware\led\led.c</FilePath>
+            </File>
+          </Files>
         </Group>
       </Groups>
     </Target>
diff --git a/User/Main/main.c b/User/Main/main.c
index d8ed874..48191dd 100644
--- a/User/Main/main.c
+++ b/User/Main/main.c
@@ -5,13 +5,15 @@
  * @date    2021.10.11
  * @brief   工程主函数文件
  * @details 初始化及主循环
- * @note    工程模版实现的功能：串口回显
+ * @note    工程模版实现的功能：串口回显，回显时 PC13 上的 LED 闪烁
  */
 
 #include "sys.h"
 #include "systick.h"
 #include "uart.h"
 
+#include "led.h"
+
 void Echo(uint8_t byte);
 
 int main(void)
@@ -24,6 +26,8 @@ int main(void)
     SysTick_Init();       //初始化 SysTick 和软件定时器
     UART_Init();          //初始化串口
 
+    LED_Init(); //初始化 LED
+
     UART_BindReceiveHandle(COM1, Echo); //绑定 COM1 串口接收中断至 Echo 函数
 
     while (1)
@@ -40,5 +44,6 @@ int main(void)
   */
 void Echo(uint8_t byte)
 {
+    LED1_Toggle;
     UART_SendChar(COM1, byte);
 }