diff --git a/my_pro/my_func.h b/my_pro/my_func.h
index c8c7e12..1632e99 100644
--- a/my_pro/my_func.h
+++ b/my_pro/my_func.h
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <malloc.h>
 #define PAGE_MAX 4
+#define LCD_MAX 240
 #define EVENT_MQTT_ENABLE (1<<3)
 // struct rt_event my_event;
 
diff --git a/my_pro/mysnake.c b/my_pro/mysnake.c
index f514faf..399f605 100644
--- a/my_pro/mysnake.c
+++ b/my_pro/mysnake.c
@@ -6,9 +6,9 @@
 #include <time.h>
 #include <rtatomic.h>
 
-#define LCD_MAX 240
-#define SNAKE_SIZE 20
-#define SNAKE_MAX (LCD_MAX / SNAKE_SIZE)
+#define LCD_MAX 240 //屏幕大小(长宽像素)
+#define SNAKE_SIZE 40 //蛇身大小(格子大小)
+#define SNAKE_MAX (LCD_MAX / SNAKE_SIZE) //每行格子数（最大蛇长+1）
 rt_atomic_t now_direction = 3;
 rt_atomic_t snake_pressed = 0;
 extern rt_atomic_t page_chosen;
@@ -32,13 +32,13 @@ void snake_entry(void *parameter)
     time_t t;
     /* 初始化随机数发生器 */
     srand((unsigned)time(&t));
-    int snake_list[SNAKE_MAX + 1][2] = {0};
+    int snake_list[SNAKE_MAX + 1][2] = {0};//储存蛇头、蛇尾、蛇身坐标
     int snake_direction[4][2] = {{0, -1}, {-1, 0}, {0, 1}, {1, 0}}; // 上，左，下，右
-    int snake_food[2];
-    bool food_flag = false;
-    char snake_dirshow[4][7] = {"upup", "left", "down", "rigt"};
-    char tmp[10];
+    int snake_food[2];//果子位置
+    char snake_dirshow[4][7] = {"upup", "left", "down", "rigt"};//显示操作用词
+    char tmp[10];//用于字符串转换
     int snake_head = 2, snake_tail = 0; // 蛇头，蛇尾
+    //设置初始位置
     snake_list[1][0] = SNAKE_MAX / 2;
     snake_list[1][1] = SNAKE_MAX / 2;
     snake_list[0][0] = snake_list[1][0] - 1;
@@ -48,19 +48,20 @@ void snake_entry(void *parameter)
     // snake_table[snake_list[0][0]][snake_list[0][1]] = 1;
     // snake_table[snake_list[1][0]][snake_list[1][1]] = 1;
     // snake_table[snake_list[2][0]][snake_list[2][1]] = 1;
-    snake_address(snake_list[0][0], snake_list[0][1], SNAKE_SIZE, BLACK);
-    snake_address(snake_list[1][0], snake_list[1][1], SNAKE_SIZE, BLACK);
-    snake_address(snake_list[2][0], snake_list[2][1], SNAKE_SIZE, BLACK);
+    // snake_address(snake_list[0][0], snake_list[0][1], SNAKE_SIZE, BLACK);
+    // snake_address(snake_list[1][0], snake_list[1][1], SNAKE_SIZE, BLACK);
+    // snake_address(snake_list[2][0], snake_list[2][1], SNAKE_SIZE, BLACK);
     snake_food[0] = rand() % SNAKE_MAX;
     snake_food[1] = rand() % SNAKE_MAX;
     // snake_address(snake_food[0], snake_food[1], SNAKE_SIZE, GREEN);
-    int new_head_x = 0, new_head_y = 0;
-    int new_direction = 0,snake_now=0;
+    int new_head_x = 0, new_head_y = 0;//新的蛇头位置
+    int new_direction = 0,snake_now=0;//随机生成的新方向，重新显示时当前位置的队列编号
     while (1)
     {
-
+        //当页面符合且不处于暂停状态才运行
         if (page_chosen == 1&&!page_stop)
         {
+            // 刚切换页面过来，重新显示
             if (page_first == 1)
             {
                 rt_kprintf("page:snake\n");
@@ -74,10 +75,10 @@ void snake_entry(void *parameter)
                     snake_address(snake_list[snake_now][0], snake_list[snake_now][1], SNAKE_SIZE, BLACK);
                 }while(snake_now!=snake_head);
             }
-
+            //如果长期（约3*SNAKE_MAX）没有按键，则随机改变方向
             if (!snake_pressed)
             {
-                // 50%的概率保持当前方向，20%的概率随机改变方向
+                // 50%的概率保持当前方向
                 if (rand() % 100 < 50)
                 {
                     new_direction = rand() % 3;
@@ -89,24 +90,27 @@ void snake_entry(void *parameter)
                 rt_atomic_add(&snake_pressed, -1);
             }
 
+            // 计算新蛇头位置、并显示坐标
             new_head_x = (snake_list[snake_head][0] + snake_direction[now_direction][0] + SNAKE_MAX) % (SNAKE_MAX);
             new_head_y = (snake_list[snake_head][1] + snake_direction[now_direction][1] + SNAKE_MAX) % (SNAKE_MAX);
-
             rt_sprintf(tmp, "(%d,%d)", new_head_x, new_head_y);
             // rt_kprintf("head:%d,%d\n", snake_list[snake_head][0], snake_list[snake_head][1]);
             lcd_show_string(20, 20, 16, snake_dirshow[now_direction]);
             lcd_show_string(20 + 16 * 4, 20, 16, tmp);
-
             snake_address(new_head_x, new_head_y, SNAKE_SIZE, BLACK);
+
+            // 蛇头碰到果子
             if (new_head_x == snake_food[0] && new_head_y == snake_food[1])
             {
+                //新生成、显示果子
                 snake_food[0] = rand() % SNAKE_MAX;
                 snake_food[1] = rand() % SNAKE_MAX;
                 snake_address(snake_food[0], snake_food[1], SNAKE_SIZE, GREEN);
+                // 长度增加、打印
                 snake_len++;
                 rt_sprintf(tmp, "%d", snake_len);
                 lcd_show_string(100, 105, 32, tmp);
-                // 防止蛇咬尾出现bug
+                // 防止蛇咬尾出现bug，限制最长为SNAKE_MAX-1，将蛇尾涂白
                 if (snake_len >= SNAKE_MAX)
                 {
                     snake_address(snake_list[snake_tail][0], snake_list[snake_tail][1], SNAKE_SIZE, WHITE);
@@ -115,6 +119,7 @@ void snake_entry(void *parameter)
             }
             else
             {
+                //若果子在蛇尾则不涂白
                 if (snake_list[snake_tail][0] == snake_food[0] && snake_list[snake_tail][1] == snake_food[1])
                 {
                 }
@@ -124,6 +129,7 @@ void snake_entry(void *parameter)
                 }
                 snake_tail = (snake_tail + 1) % (SNAKE_MAX);
             }
+            //记录新的蛇头
             snake_head = (snake_head + 1) % (SNAKE_MAX);
             snake_list[snake_head][0] = new_head_x;
             snake_list[snake_head][1] = new_head_y;