diff --git a/USER/main.c b/USER/main.c
index eefd35c..4c1d954 100644
--- a/USER/main.c
+++ b/USER/main.c
@@ -41,7 +41,7 @@ int main(void)
 	printf("5--开启流水灯\r\n");
 	printf("6--读取开关状态以及流水灯的状态\r\n");
 	printf("?--查看说明\r\n");
-	TIM2_INIT(499,4999);
+	TIM2_INIT(499,3999);
 	TIM3_PWM_INIT(4096,2);
 	while (1)
 	{