c8051f的uart口的测试程序，用来测试c8051f单片机串口是否正常

C8051F系列单片机串口1驱动程序，采用中断方式，实现了字节的读、写以及字符串的读、写。-C8051F series single-chip serial port 1 driver using interrupt mode, the realization of the byte read, write, and the string of reading and writing.