diff --git a/app.c b/app.c
index 42fd279..d0ea456 100644
--- a/app.c
+++ b/app.c
@@ -72,7 +72,7 @@ uint32_t judge_recv_lcd_data_finish_main(uint8_t time)
 void main()
 {
   peripheral_config();//各种初始化包括ram清零
-  uint8_t record_last_time=0;
+  uint32_t record_last_time=0;
   while (1)
   {
     debug_light_ctrl_process_in_main_loop();//闪灯效果