该段代码给基于黑金开发板DB2C5的串口调试代码。由于黑金视频都是基于DB2C8开发板开发的，本人讲代码移植到DB2C5并修改，实验后完全正确。-This code to based the the black gold development board DB2C5 serial debugging code. Black gold videos are based on DB2C8 development board developed, I speak the code to DB2C5