diff --git a/Makefile b/Makefile
index 835f768..4fe4e70 100644
--- a/Makefile
+++ b/Makefile
@@ -51,7 +51,7 @@ main.hex: $(TARGET)
 
 flash:
 	-sudo chmod 777 $(COM)
-	-./reset_mcu.sh
+	-./reset_mcu.sh $(COM)
 	-stcgal -P stc89 -p $(COM) main.hex
 
 #led.bin:led.hex
diff --git a/reset_mcu.sh b/reset_mcu.sh
index 9ea07fa..8c9580a 100755
--- a/reset_mcu.sh
+++ b/reset_mcu.sh
@@ -16,9 +16,13 @@
 # ---      ----        ---         -----------
 # 0.0.01   2024-07-14  Feng Bohan  initial version
 #===========================================================================
-stty -F /dev/ttyUSB0 speed 9600 cs8 -parenb -cstopb raw -echo -echoe -echok -echoctl -echoke
+if [ "$#" -ne 1 ]; then
+    echo "错误：此脚本需要且仅需要一个参数, 作为COM口号"
+    exit 1  # 使用非零状态码退出表示异常
+fi
+stty -F $1 speed 9600 cs8 -parenb -cstopb raw -echo -echoe -echok -echoctl -echoke
 
-echo -e "RESET!" > /dev/ttyUSB0
+echo -e "RESET!" > $1
 
  
 #说明：