eecs-bsp-test-code/2/main.c

#include "Beep.h"
#include "STC15F2K60S2.H"
#include "sys.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();
    }
}