蓝桥杯单片机第十二届省赛第二场

 

#include <reg52.h>
#include <iic.h>
sbit s4=P3^3;
sbit s5=P3^2;
sbit s6=P3^1;
sbit s7=P3^0;

unsigned char code smg_nodot[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char code smg_dot[10]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};
unsigned int data_f=0; //注意变量类型是int ！！！
unsigned int count_f=0;//变量类型是int !!!
unsigned char count=0;//频率计时
unsigned char count1=0;//长按键计时
unsigned char flag_s4=0;//界面按键
bit flag_s5=0;//电压通道切换按键
bit flag_led=0;//led功能模块标志
bit key_f=0;//按键按下标志
unsigned char dat_RD1=0;
unsigned char dat_Rb2=0;//采样数据
float RD1_value=0; //注意变量类型是float ！！！
float Rb2_value=0;//换算电压
unsigned int smg_Rb2=0;
unsigned int smg_RD1=0;//显示电压,注意变量类型是int ！！！
unsigned int save_Rb2=0;
unsigned int save_f=0;//数据缓存
void read_RD1();
void read_Rb2();
//数码管显示模块
void delaysmg(unsigned int t)
{
  while(t--);
}
void displaysmg(unsigned char pos,unsigned char value)
{
	P2=0XE0;P0=0XFF;
	P2=0XC0;P0=0X01<<pos;
	P2=0XE0;P0=value;
}
void display_f() //频率显示界面
{
   if(data_f>9999)
  {
  		displaysmg(3,smg_nodot[data_f/10000]);
		delaysmg(100);
  } 
   if(data_f>999)
  {
  		displaysmg(4,smg_nodot[(data_f/1000)%10]);
 		delaysmg(100);
  }
   if(data_f>99)
  {
  		displaysmg(5,smg_nodot[(data_f/100)%10]);
  		delaysmg(100);
  }
  if(data_f>9)
  {
  		displaysmg(6,smg_nodot[(data_f/10)%10]);
  		delaysmg(100);
  }
  displaysmg(7,smg_nodot[data_f%10]);
  delaysmg(100);
  displaysmg(0,0x8e);
  delaysmg(100);
  displaysmg(1,0xff);
  delaysmg(100);
  displaysmg(2,0xff);
  delaysmg(100);
}
void display_T()//周期显示界面
{
   unsigned int data_T=(1000000/data_f);//注意数据类型，int ！！！
   if(data_T>9999)
  {
  		displaysmg(3,smg_nodot[data_T/10000]);
		delaysmg(100);
  } 
   if(data_T>999)
  {
  		displaysmg(4,smg_nodot[(data_T/1000)%10]);
 		delaysmg(100);
  }
  if(data_T>99)
  {
  		displaysmg(5,smg_nodot[(data_T/100)%10]);
  		delaysmg(100);
  }
  if(data_T>9)
  {
  		displaysmg(6,smg_nodot[(data_T/10)%10]);
  		delaysmg(100);
  }
  displaysmg(7,smg_nodot[data_T%10]);
  delaysmg(100);
  displaysmg(0,0xc8);
  delaysmg(100);
  displaysmg(1,0xff);
  delaysmg(100);
  displaysmg(2,0xff);
  delaysmg(100);
}
void display_U(unsigned char ch,unsigned int dat)//电压显示界面 ,注意dat的类型是int ！！！
{
  displaysmg(7,smg_nodot[dat%10]);
  delaysmg(500);
  displaysmg(6,smg_nodot[(dat/10)%10]);
  delaysmg(500);
  displaysmg(5,smg_dot[dat/100]);
  delaysmg(500);
  displaysmg(4,0xff);
  delaysmg(500);
  displaysmg(0,0xc1);
  delaysmg(500);
  displaysmg(1,0xbf);
  delaysmg(500);
  displaysmg(2,smg_nodot[ch]);
  delaysmg(500);
  displaysmg(3,0xff);
  delaysmg(500);
  P2=0XC0;P0=0XFF;P2=0XE0;P0=0XFF;
}
void init_T()//定时器初始化
{
	TH0=0XFF;
	TL0=0XFF;//8位重装计数器，定时器0，工作模式2；0110
	TH1=(65535-50000+1)/256;
	TL1=(65535-50000+1)%256;//定时，定时器1，工作模式1；0001
	TMOD=0x16;//0001 0110
	ET0=1;
	ET1=1;
	EA=1;
	TR0=1;
	TR1=1;
}
void service_T0() interrupt 1	//中断服务函数，定时器0对应类型号1
{
 	count_f++;
}
void service_T1() interrupt 3//中断服务函数，定时器1对应类型号3
{
	TH1=(65535-50000+1)/256;
	TL1=(65535-50000+1)%256;
	count++;
	if(key_f==1)//长按键计时
	{
		count1++;
	}
	if(count==20)//频率计时1s
	{
		data_f=count_f; //记下1s的频率，即所测量的数据
		count=0;
		count_f=0;
	}
}
 void display()//界面显示
{
	switch(flag_s4)
	{
	  case 0://频率显示 
	  display_f();break;
	  case 1://周期显示
	  display_T();break; 
	  case 2://电压显示
	  if(flag_s5==0) 
	  {
		 read_RD1();
	  	 display_U(1,smg_RD1);
	  }
	  else if(flag_s5==1)
	  {
		 read_Rb2();
		 display_U(3,smg_Rb2);
	  } break;
	}
}
void led()
{
	P2=0X80;
   if(flag_led==1)  P0=0XFF;
	else if(flag_led==0)
	{
		if(flag_s4==0)	 
		{
			P0&=0XFB;
			if(data_f>save_f) {P0&=0xfd;}
		}
		else if(flag_s4==1)  P0&=0XF7;
		else if(flag_s4==2)  
		{
			if(flag_s5==0)  P0&=0XEF;
			else if(flag_s5==1)
			{
				 P0&=0XEF;
				 if(smg_Rb2>save_Rb2) {P0&=0xfe;}
			}
		}
	}

}
void key()
{
	if(s4==0)
	{
	  delaysmg(100);
	  if(s4==0)
	  {
	  	  while(s4==0)
		  {
		  	  display();
		  }
		  flag_s4++;
	  }
	  if(flag_s4==3)
	  {
	  	  flag_s4=0;
		  flag_s5=0; //每次从周期界面到电压显示，都是通道1
	  }
	}
	if(flag_s4==2)
	 {
	  	  if(s5==0)
		  {
		  	  delaysmg(100);			
			  if(s5==0)
			  {
				  while(s5==0)
				 {
				 	 display();
				 }
				 flag_s5=~flag_s5;
			  }
		  } 
	  }
	  if(s6==0)
	  {
	  	 delaysmg(100);
		 if(s6==0)
		 {
		 	while(s6==0)
			{
				 display();
			}
				save_Rb2=smg_Rb2;
		 }
	  }
	  if(s7==0)//长按键
	  {
	  	 delaysmg(100);
		 if(s7==0)
		 {

			key_f=1;
			while(s7==0)
			{
				 display();
			}
			key_f=0;
			if(count1<=20)
			{
				count1=0;
				save_f=data_f;
			}
			else if(count1>20)//时间大于1s，长按
			{
				count1=0;
				flag_led=~flag_led;
			}
		 }
	  }
}
void read_RD1()//读取光敏电阻电压
{
	 IIC_Start();
	 IIC_SendByte(0x90);
	 IIC_WaitAck();
	 IIC_SendByte(0x01);
	 IIC_WaitAck();
	 IIC_Stop();

	 IIC_Start();
	 IIC_SendByte(0x91);
	 IIC_WaitAck();
	 dat_RD1=IIC_RecByte();
	 IIC_SendAck(1);
	 IIC_Stop();
	 RD1_value=dat_RD1*(5.0/255);
	 smg_RD1=RD1_value*100;
}
void read_Rb2()//读取电位器电阻电压
{
	 IIC_Start();
	 IIC_SendByte(0x90);
	 IIC_WaitAck();
	 IIC_SendByte(0x03);
	 IIC_WaitAck();
	 IIC_Stop();

	 IIC_Start();
	 IIC_SendByte(0x91);
	 IIC_WaitAck();
	 dat_Rb2=IIC_RecByte();
	 IIC_SendAck(1);
	 IIC_Stop();
    Rb2_value=dat_Rb2*(5.0/255);
	 smg_Rb2=Rb2_value*100;
}
void main()
{
  	P2=0xa0;P0=0X00;P2=0X80;P0=0XFF;
	init_T();
	while(1)
	{
		key();
		led();
		display();
	}
}