真正STC单片机可用单定时器（timer0），全双工，软件模拟串口代码。调整芯片主频和需要的波特率后可，直接使用。-Single timer based, full duplex, soft simulated UART sample code. Total usable for STC series as long as the Fosc and Baud rate is set correctly in header file. (Fully tested on STC12 chips)