十四届蓝桥杯单片机模拟赛第二套题 自撸程序

#include <STC15F2K60S2.H>
#include <onewire.H>
#include <stdio.H>
#include <iic.H>
sbit R1=P3^0;
sbit R2=P3^1;
sbit R3=P3^2;
sbit R4=P3^3;
sbit C1=P4^4;
sbit C2=P4^2;
sbit C3=P3^5;
sbit C4=P3^4;
unsigned char F_SMG=1; //数码管标志位 1温度界面 2电压读取界面
unsigned char command; //获取下位机命令
unsigned int SMG_vlot;  //数码管电压显示参数
unsigned int SMG_T;     //数码管温度显示参数
unsigned int adc_value; //电压处理参数
unsigned char count_t;  //T0 定时50ms 中断计数
float adc_vlot;					//电压实际值
float b20_temp;					//温度实际值
unsigned char code Nodat[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char code Isdat[10]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};


//=============================控制函数====================================
void SelctHC573(unsigned char n)										//P2控制位HC573
{
	switch(n)
	{
		case 0: P2=(P2 & 0x1f) |0x00; break; 
		case 4: P2=(P2 & 0x1f) |0x80; break; 
		case 5: P2=(P2 & 0x1f) |0xa0; break; 
		case 6: P2=(P2 & 0x1f) |0xc0; break; 
		case 7: P2=(P2 & 0x1f) |0xe0; break; 
	}
}
//========= P0输出控制位
void Output_P0(unsigned char pos,unsigned char value)  
{
	SelctHC573(pos);
	P0=value;				        //控制完成后，取消位选，P0赋值为0x00
	SelctHC573(0);   																
	P0=0x00;
}
//======== 数码管专用延时 1-3ms
void Delay2ms()		
{
	unsigned char i, j;
	i= 24;
	j = 85;
	do
	{
		while (--j);
	} while (--i);
}
//======== 单个数码控制
void SMGBit(unsigned char pos,unsigned char value)  
{
 
	Output_P0(6,0x01<<pos);  //位选————段选赋值————延时—————位选输出---—关闭数码管 												
	Output_P0(7,value);
	Delay2ms();
	Output_P0(6,0x01<<pos);
	Output_P0(7,0xff);
}
//======== 全部数码管控制
void SMGALL(unsigned char value)  								
{
	Output_P0(6,0xff);
	Output_P0(7,value);
}
//=============================显示函数====================================
void DisplaySMG()
{
	switch(F_SMG)
	{
	case 1 :  						//温度界面
	Output_P0(4,~0x01);   //点亮L1灯
	SMGBit(0,0xc1);				//U
	SMGBit(1,Nodat[1]);   //界面1 or 2
	SMGBit(2,0xff); 	
	SMGBit(3,0xff);  
	SMGBit(4,0xff);  
	SMGBit(5, Nodat[SMG_T/100]   );   // SMG_T=212  实际温度21.2扩大10倍 
	SMGBit(6, Isdat[(SMG_T/10)%10] ); //十位
	SMGBit(7, Nodat[SMG_T%10]   );    // 各位
	SMGALL(0xff);										  // 全部数码管静止显示
	break;
	case 2 :
	Output_P0(4,~0x02);
	
	SMGBit(0,0xc1);
	SMGBit(1,Nodat[2]); 
	SMGBit(2,0xff); 	
	SMGBit(3,0xff);  
	SMGBit(4,0xff);  
	SMGBit(5, Isdat[SMG_vlot/100]   ); // SMG_vlot=129  实际电压1.29.扩大100倍 
	SMGBit(6, Nodat[(SMG_vlot/10)%10] );
	SMGBit(7, Nodat[SMG_vlot%10]   );
	SMGALL(0xff);
		break;
}
	}
//======== 刷新数码管的延时函数  
void Delay1ms(unsigned char t)		
{
 while(t--)
 {
	DisplaySMG();											//总延时==8*数码专用延时*T ms
}
 }
//=============================初始化函数====================================
void Initsystem()
{
	Output_P0(4,0xff);              //关闭LED灯、蜂鸣器、继电器
	Output_P0(5,0x00);							//打开串行中断允许位
	ES=1;
}
//======== Uart1初始化
void IintUart()
{
	SCON = 0x50;		//8位数据,可变波特率
	AUXR &= 0xBF;		//定时器1时钟为Fosc/12,即12T
	AUXR &= 0xFE;		//串口1选择定时器1为波特率发生器
	TMOD &= 0x0F;		//设定定时器1为16位自动重装方式
	TL1 = 0xE6;		//设定定时初值
	TH1 = 0xFF;		//设定定时初值
	ET1 = 0;		//禁止定时器1中断
	TR1 = 1;		//启动定时器1
	EA = 1;         //打开总中断 ******自己添加***
}
//======== T0初始化
void Timer0Init()		//50毫秒@12.000MHz
{
	AUXR &= 0x7F;		//定时器时钟12T模式
	TMOD &= 0xF0;		//设置定时器模式
	TMOD |= 0x01;		//设置定时器模式
	TL0 = 0xB0;		//设置定时初值
	TH0 = 0x3C;		//设置定时初值
	TF0 = 0;		//清除TF0标志
	TR0 = 1;		//定时器0开始计时
	EA=1;    		//********EA   ET0 自己添加********
	ET0=1;
}
//=============================中断请求函数====================================
void ServiceTimber0() interrupt 1
{
	TL0 = 0xB0;		//设置定时初值
	TH0 = 0x3C;		//设置定时初值
	 count_t++;
	if(count_t==2)
	{
		count_t=0;							// 定时到0.1s 判断串行口是否关闭
		if(ES==0)   
		{
		Output_P0(4,~0x04);			// L3点亮
		}	}
}
//======== Uart中断
void ServiceUart()  interrupt 4
{
	if(RI==1)
	{
		command=SBUF;					//下位机命令读取
		RI=0;
	}
}

//=============================printf函数初始化====================================
//======== 发送一个字节数据
void sendByte(unsigned char dat){
   SBUF = dat;     //写入发送缓冲寄存器
   while(!TI);    //等待发送完成，TI发送溢出标志位 置1
   TI = 0;      //对溢出标志位清零	
}
//======== 输出重定向到串口
char putchar(char c)
{
	sendByte(c);
	return c;  //返回给函数的调用者printf
}

//=============================下位机命令处理====================================
void Command_mange ()
{
    if(command=='A')
	  {
			F_SMG=1; command='\0';
      }

    if(command=='B')
	  {
			F_SMG=2; command='\0';
      }
}
//=============================温度电压数据读取====================================
//======== 温度读取
unsigned int Read_temp ()
{
	unsigned int medium;
	unsigned char LSB,MSB;
	init_ds18b20();
  Write_DS18B20(0xcc);
	Write_DS18B20(0x44);

	Delay1ms(31);  //****750ms*******
	
	init_ds18b20();
  Write_DS18B20(0xcc);
	Write_DS18B20(0xbe);
	
	LSB=Read_DS18B20();
	MSB=Read_DS18B20();
	
	medium=MSB;
	medium <<=8;
	medium |= LSB;
	
   if((medium & 0xf800)==0x0000)
	{
		
		medium=medium>>4;
		medium=medium*10;
		medium=(medium+(LSB&0x0f)*0.625);
	}
	return medium;  //返回值  为实际温度的10倍
}

//======== 电压读取
unsigned char Read_AD()
{
	 unsigned char medium;
	 IIC_Start();
	 IIC_SendByte(0x90); 
	 IIC_WaitAck(); 
    
	 IIC_SendByte(0x03);	
	 IIC_WaitAck(); 
	 IIC_Stop(); 
	
	 DisplaySMG(); //****几毫秒足够*******
	
	 IIC_Start();
	 IIC_SendByte(0x91); 
	 IIC_WaitAck(); 

	 medium=IIC_RecByte(); 
	 IIC_SendAck(1);
	 IIC_Stop();
	 return medium;   //返回值  为未处理的AD值
}
//=============================温度电压数据处理====================================
	void Date_mange()
{
	 char i;
	 SMG_T=Read_temp();
	
	
	 adc_value=0;
	 for(i=0;i<3;i++)
	{
	adc_value +=Read_AD();  
	}
	 adc_value=adc_value/3;					//三次采样取平均的电压值
	 adc_vlot=adc_value*(5.0/255);  //实际电压值
	 SMG_vlot=adc_vlot*100;         //数码管电压值
	
//======== 温度电压判断	
	if(SMG_T>=240) 					
	{
		Output_P0(5,(P0&0x40)|0x10);  // 温度电压判断
		DisplaySMG();
	}
	if(adc_vlot>=3.6)
	{
		Output_P0(5,(P0&0x10)|0x40);
	}
  else{Output_P0(5,0x00);}
}
//=============================键盘扫描====================================
void Scankey()
{
	  R4 = 0;
    R2 = R3 = R1 = 1;
    C1 = C2 = C3 = C4 = 1;
    if(C1 == 0) //S4
{
		   Delay1ms(1);
		if(C1 == 0)
			 {
			 ES = 0; //关闭串行中断
		   }
		while(C1==0)
	  {
		 DisplaySMG();
		}
}

	 else if(C3 == 0) //S12
{
			Delay1ms(1);
	 if(C3 == 0)
		{
		 if(F_SMG==1)					 //判断当前界面是
		  {
		   b20_temp=SMG_T*0.1; //实际温度
			 printf("TEMP: %.1f℃ \r\n",b20_temp);
		   }
		 if(F_SMG==2)
			 {
				printf("Vlotage:%.2fV\r\n",adc_vlot);
			 }
		}
	 while(C3==0)
	{
		DisplaySMG();
	}
}
	  R3 = 0;
    R4 = R2 = R1 = 1;
    C1 = C2 = C3 = C4 = 1;
    if(C1 == 0) //S4
    {
		   Delay1ms(1);
		if(C1 == 0)
			 {
			 ES = 1;  //打开串行中断
		   }
		while(C1==0)
	  {
		 DisplaySMG();
		}
}
}
//=============================主函数====================================

void main()
{
 Initsystem();
 Timer0Init();
 IintUart();
	while(1)
	{
		 Command_mange ();
		 Scankey();
		 Date_mange();
     DisplaySMG();
	}
}