说明：  在超低功耗单片机MSP430上实现日历时钟的功能的代码,用汇编和C混合编程.是学习MSP430单片机和混合编程的好例子
(In the ultra-low power MSP430 microcontroller to achieve the function of the calendar clock code, compile and C mixed programming. Is to learn MSP430 microcontroller and a good example of mixed programming)