#include "STC15F2K60S2.H" #include "sys.H" #include "Beep.h" code unsigned long SysClock = 11059200; //必须。定义系统工作时钟频率(Hz),用户必须修改成与实际工作频率(下载时选择的)一致 void main() { BeepInit(); MySTC_Init(); SetBeep(1200,180); while (1) { MySTC_OS(); } }