帮忙用C语言写一段51单片机的程序,晶振12M。答:0x7E,0xCB,0xEE,0x1C,0x7E,0x34,0x58 };code unsigned char Pre_Freq[21] = {255,8,4,3,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1};define TH1_RELOAD 0xF4//---定时器1初始值,定时3ms define TL1_RELOAD 0x48//---定时器1初始值,定时3ms data unsigned char Freq = 20...