diff --git a/Hyt2/BSP/Driver/tmc2160/tmc2160.c b/Hyt2/BSP/Driver/tmc2160/tmc2160.c
index bed861c..9b36588 100644
--- a/Hyt2/BSP/Driver/tmc2160/tmc2160.c
+++ b/Hyt2/BSP/Driver/tmc2160/tmc2160.c
@@ -232,7 +232,7 @@ void tmc2160_init()
         
         nvic_irq_enable(TIMER4_IRQn, 2u, 3u);//配置中断优先级
             
-        /* TIMER7 enable */
+        /* TIMER4 enable */
 //        timer_enable(TIMER4);//使能定时器 
 #endif 
   
diff --git a/Hyt2/GD32F4xx_Firmware_Library/SYSTICK/gd32f4xx_it.c b/Hyt2/GD32F4xx_Firmware_Library/SYSTICK/gd32f4xx_it.c
index 3d93d27..9315a02 100644
--- a/Hyt2/GD32F4xx_Firmware_Library/SYSTICK/gd32f4xx_it.c
+++ b/Hyt2/GD32F4xx_Firmware_Library/SYSTICK/gd32f4xx_it.c
@@ -246,16 +246,16 @@ void EXTI5_9_IRQHandler(void)
     if ( !gpio_input_bit_get(GPIOE, GPIO_PIN_9) )
     {
       exti_init(EXTI_9, EXTI_INTERRUPT, EXTI_TRIG_RISING);//上升沿中断 
-      timer_enable(TIMER12);//使能定时器
-      timer_counter_value_config(TIMER12, 0u); 
+      timer_enable(TIMER4);//使能定时器
+      timer_counter_value_config(TIMER4, 0u); 
       //      ptz_hori_timer_stop();
       g_dcStepHori = 0;
     }
     else
     {
       exti_init(EXTI_9, EXTI_INTERRUPT, EXTI_TRIG_FALLING);//下降沿中断 
-      timer_disable(TIMER12);//失能定时器
-      timer_counter_value_config(TIMER12, 0u);
+      timer_disable(TIMER4);//失能定时器
+      timer_counter_value_config(TIMER4, 0u);
       g_dcStepHori = 1;
     }
     /*function end*/