蓝桥杯单片机频率

long int Freq;
unsigned int Timer_1000Ms;

 

加上 TMOD |= 0x05;

void Timer0Init(void)		//0毫秒@12.000MHz
{AUXR &= 0x7F;		//定时器时钟12T模式TMOD &= 0xF0;		//设置定时器模式TMOD |= 0x05;TL0 = 0x00;		//设置定时初值TH0 = 0x00;		//设置定时初值TF0 = 0;		//清除TF0标志TR0 = 1;		//定时器0开始计时
}

 

void Timer1Init(void)		//1毫秒@12.000MHz
{AUXR &= 0xBF;		//定时器时钟12T模式TMOD &= 0x0F;		//设置定时器模式TL1 = 0x18;		//设置定时初值TH1 = 0xFC;		//设置定时初值TF1 = 0;		//清除TF1标志TR1 = 1;		//定时器1开始计时ET1 = 1;    //允许定时器1产生中断请求EA = 1;     // 开启总中断（全局中断）
}void Timer1Sever()    interrupt 3
{if(++ Timer_1000Ms == 1000){Timer_1000Ms = 0;Freq = (TH0 << 8) | TL0;TH0 = TL0 = 0;		}
}