基于《Stellaris外设驱动库》的例程：定时器32位RTC用法示例 该程序演示了如何使用定时器配置为32为RTC模式，并使用RTC定时器产生匹配中断。-Based on " Stellaris peripheral driver library" of routines: 32-bit RTC timer usage example of the program demonstrated how to use the timer is configured to 32 fo