在ADS1.2下测试，RTC实时时钟程序，在PC上通过串口连接S3C44B0板子，并用PC自带超级终端监视串口在程序运行后的输出。-In ADS1.2 test, RTC Real Time Clock procedures adopted in the PC serial port to connect S3C44B0 board, and bring their own PC HyperTerminal to monitor the program to run after the seri