在使用minicom查看log時候，今天發現無法回車進入到命令行模式輸入命令了，通過查找資料發現關鍵點就在串口的配置中有個Serial port setup-->Hardware Flow Contorl選項被改成了Yes，這樣就造成了鍵盤沒有用了，接受不了任何輸入。把他改成No就好了。具體修改操作如下：
sudo minicom -s
+-----[configuration]------+
| Filenames and paths |
| File transfer protocols |
| Serial port setup |
| Modem and dialing |
| Screen and keyboard |
| Save setup as dfl |
| Save setup as.. |
| Exit |
| Exit from Minicom |
+--------------------------+
進入Serial port setup界面
+-----------------------------------------------------------------------+
| A - Serial Device : /dev/ttyS1 |
| B - Lockfile Location : /var/lock |
| C - Callin Program : |
| D - Callout Program : |
| E - Bps/Par/Bits : 115200 8N1 |
| F - Hardware Flow Control : No |
| G - Software Flow Control : No |
| |
| Change which setting? |
+-----------------------------------------------------------------------+
此時F - Hardware Flow Contorl項為Yes，按下F鍵就修改為No了，即關閉硬件流控，回車回到上級菜單
+-----[configuration]------+
| Filenames and paths |
| File transfer protocols |
| Serial port setup |
| Modem and dialing |
| Screen and keyboard |
| Save setup as dfl |
| Save setup as.. |
| Exit |
| Exit from Minicom |
+--------------------------+
選擇| Save setup as dfl |，然後選擇 Exit from Minicom 重啟minicom
這樣就可以輸入命令了。