diff --git a/digital-clock.ino b/digital-clock.ino
index f40cec7..0a94a36 100644
--- a/digital-clock.ino
+++ b/digital-clock.ino
@@ -13,6 +13,12 @@
 /*** 引入关键库 ****/
 #include "ovo.h"
 
+/*** 是否开启debug模式 ****/
+
+//去掉下一行的注释以开启debug模式
+//#define DEBUG_MODE
+
+
 /*** 定义初始参数 ****/
 
 //小组组号
@@ -59,24 +65,46 @@ void setup(){
     switch_ini();
     //初始化串口,方便debug
     Serial.begin(115200);
+#ifdef DEBUG_MODE
+    //初始化板载led,作为debug的指示灯
+    pinMode(LED_BUILTIN, OUTPUT);
+#endif
 }
 
 
 /*** 实例化组件 ****/
 
+#ifdef DEBUG_MODE
+
+//时钟显示屏实例化
+Debug_DigitalClock clock(GROUP_ID);
+
+
+#else
+
 //时钟显示屏实例化
 DigitalClock clock(GROUP_ID);
-//开关组件实例化
-Switch swi(SWI_OFF), reset(SWI_RESET);
 
+#endif
 
+//开关组件实例化
+Switch swi(SWI_OFF), reset(SWI_RESET);
 
 /*** 主循环程序 ****/
 
 void loop(){
 
     /*** 主要控制逻辑 ****/
+#ifdef DEBUG_MODE
 
+    //如果reset键或开关键被按下，板载led亮
+    if(reset.isPressed() == true || swi.isPressed() == true) {
+        digitalWrite(LED_BUILTIN, HIGH);
+    }else{
+        digitalWrite(LED_BUILTIN, LOW);
+    }
+
+#else
     //如果reset键被按下，重置时钟
     if(reset.isPressed() == true) {
       clock.reset();
@@ -87,7 +115,7 @@ void loop(){
     //如果开关打开，则开始或停止计时
     if(swi.getStatus() == true) clock.show();
     else clock.hide();
-
+#endif
 
     /*** 守护进程 ****/
     clock.core();
diff --git a/digital-screen.h b/digital-screen.h
index 3f6e75a..cf8ed21 100644
--- a/digital-screen.h
+++ b/digital-screen.h
@@ -175,4 +175,106 @@ void digital_clock_ini(){
 
 
 
+#ifdef DEBUG_MODE
+
+class Debug_DigitalClock{
+
+public:
+
+    Debug_DigitalClock(int group = 22){
+
+        this->_group = group;
+        _ice = 0;
+        _cnt = 0;
+    };
+
+
+
+    /**
+     * control digital screens
+     *
+     * @Author yimian
+     * @param int num # 待显示数字
+     * @return void
+     */
+    inline void digital_show(int num){
+
+        if(num == -1 || _ice == 1){
+            //digital_show_1(15);
+            //digital_show_2(15);
+            return;
+        }
+
+        digital_show_1(num % 10);
+        digital_show_2(num % 10);
+    }
+
+
+
+    void core(){
+
+        setInterval([&](){
+            this->digital_show(this->_cnt % (this->_group + 1));
+            if(this->_ice != 1) this->_cnt++;
+        }, INTERVAL_TIME);
+    }
+
+    inline void hide(){
+        this->_ice = 1;
+    }
+
+    inline void show(){
+        this->_ice = 0;
+    }
+
+    inline void change(){
+        this->_ice = !(this->_ice);
+    }
+
+    inline void reset(){
+        this->_cnt = 0;
+    }
+
+private:
+
+    int _group;
+    int _ice;
+    unsigned int _cnt;
+
+    /**
+     * control digital screen 1
+     *
+     * @Author yimian
+     * @param int num # 待显示数字
+     * @return void
+     */
+    void digital_show_1(int num){
+
+        digitalWrite(DIG_1_1, !!(num & (0x01<<0)));
+        digitalWrite(DIG_1_2, !!(num & (0x01<<1)));
+        digitalWrite(DIG_1_3, !!(num & (0x01<<2)));
+        digitalWrite(DIG_1_4, !!(num & (0x01<<3)));
+    }
+
+
+    /**
+     * control digital screen 2
+     *
+     * @Author yimian
+     * @param int num # 待显示数字
+     * @return void
+     */
+    void digital_show_2(int num){
+
+        digitalWrite(DIG_2_1, !!(num & (0x01<<0)));
+        digitalWrite(DIG_2_2, !!(num & (0x01<<1)));
+        digitalWrite(DIG_2_3, !!(num & (0x01<<2)));
+        digitalWrite(DIG_2_4, !!(num & (0x01<<3)));
+    }
+
+
+};
+
+#endif
+
 #endif