蓝桥杯单片机省赛第六届

 

 

 

 难点 如何通过按键设置温度上下限；定义一个数组用来显示温度，通过按键按下次数来判断显示温度上下限；定义一个数组用来存放温度的数值，用按键按下次数判断温度是十位还是个位

main.c

#include <STC15F2K60S2.H>
#include <ONEWIRE.H>

unsigned int wendu;
unsigned char qujian;
unsigned char keynumber;
unsigned char display_mode;
unsigned char Tmax=30;
unsigned char Tmin=20;
unsigned char key_press;
unsigned char led_flag=1;
#define NO_KEY 0xff
#define KEY_STATE0 0
#define KEY_STATE1 1
#define KEY_STATE2 2

unsigned char smgdisplay[8];
unsigned char wd[8];
unsigned char smg_du[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};

void Device_ctrl(unsigned char p2date,unsigned char p0date);
unsigned char key_scan()
{
		static unsigned char key_state=KEY_STATE0;
	  unsigned char key_value=0,key_temp;
	  unsigned char key1,key2;
	 
	  P30=0;P31=0;P32=0;P33=0;P34=1;P35=1;P42=1;P44=1;
	  if(P44==0){key1=0x70;}
		if(P42==0){key1=0xb0;}
		if(P35==0){key1=0xd0;}
		if(P34==0){key1=0xe0;}
    if((P44==1)&&(P42==1)&&(P35==1)&&(P34==1)){key1=0xf0;}
		
		P30=1;P31=1;P32=1;P33=1;P34=0;P35=0;P42=0;P44=0;
	  if(P30==0){key2=0x0e;}
		if(P31==0){key2=0x0d;}
		if(P32==0){key2=0x0b;}
		if(P33==0){key2=0x07;}
    if((P30==1)&&(P31==1)&&(P32==1)&&(P33==1)){key2=0x0f;}
		
		key_temp=key1|key2;
		
		switch(key_state)
		{
			case KEY_STATE0: if(key_temp!=NO_KEY)
			                 {
													key_state=KEY_STATE1;
											 }
											 break;
			case KEY_STATE1: if(key_temp==NO_KEY)
			                 {key_state=KEY_STATE0;}
											 else
											 {
												switch(key_temp)
												{
													case 0x77:key_value=4;break;
													case 0x7b:key_value=5;break;
													case 0x7d:key_value=6;break;
													case 0x7e:key_value=7;break;
													
													case 0xb7:key_value=8;break;
													case 0xbb:key_value=9;break;
													case 0xbd:key_value=10;break;
													case 0xbe:key_value=11;break;
													
													case 0xd7:key_value=12;break;
													case 0xdb:key_value=13;break;
													case 0xdd:key_value=14;break;
													case 0xde:key_value=15;break;
													
													case 0xe7:key_value=16;break;
													case 0xeb:key_value=17;break;
													case 0xed:key_value=18;break;
													case 0xee:key_value=19;break;
												}
												key_state=KEY_STATE2;
											 }
											 break;
											
	   case KEY_STATE2:if(key_temp==NO_KEY)
										 {key_state=KEY_STATE0;}break;
	
		
		}
   
		return  key_value;
}
unsigned int key_count;
void key_process()
{
	  unsigned int key_val;
	  if(key_count>=5)
		{
			key_count=0;
			key_val=key_scan();
			
			switch(key_val)
			{
				case 4:smgdisplay[key_press]=smg_du[9];wd[key_press]=9;key_press++;break;
				case 5:smgdisplay[key_press]=smg_du[6];wd[key_press]=6;key_press++;break;
				case 6:smgdisplay[key_press]=smg_du[3];wd[key_press]=3;key_press++;break;
				case 7:smgdisplay[key_press]=smg_du[0];wd[key_press]=0;key_press++;break;
				
				case 8:display_mode++;
				       if(display_mode==2)
							 {
								 display_mode=0;
								 key_press=0;
								 Tmax=wd[1]*10+wd[2];
								 Tmin=wd[6]*10+wd[7];
								 if(Tmax<Tmin)
								 {
									P2=0X80;P0=~0X02;P2=0;
									led_flag=0;
								 }
								 else
								 {
									P2=0X80;P0=0Xff;P2=0;
									led_flag=1;
								 }
							 }break;
				case 9:smgdisplay[key_press]=smg_du[7];wd[key_press]=7;key_press++;break;
				case 10:smgdisplay[key_press]=smg_du[4];wd[key_press]=4;key_press++;break;
				case 11:smgdisplay[key_press]=smg_du[1];wd[key_press]=1;key_press++;break;
				
				case 12:if(display_mode==1)
				        {
									smgdisplay[1]=0x00;
									smgdisplay[2]=0x00;
									smgdisplay[6]=0x00;
									smgdisplay[7]=0x00;
									key_press=0;
								}break;
				case 13:smgdisplay[key_press]=smg_du[8];wd[key_press]=8;key_press++;break;
				case 14:smgdisplay[key_press]=smg_du[5];wd[key_press]=5;key_press++;break;
				case 15:smgdisplay[key_press]=smg_du[2];wd[key_press]=2;key_press++;break;
				
				case 16:break;
				case 17:break;
				case 18:break;
				case 19:break;
					
			}
		}
}
void Device_ctrl(unsigned char p2date,unsigned char p0date)
{
		P0=p0date;
	  P2=P2&0X1F|p2date;
	  P2&=0X1F;
}


unsigned char smg_display[8];

unsigned int smg_count;
void smg_show()
{
		unsigned int i;
	  Device_ctrl(0xc0,0);
	  if(display_mode==0)
    {
		 Device_ctrl(0xe0,~smg_display[i]);
		}
	  else
		{
		 Device_ctrl(0xe0,~smgdisplay[i]);
		}
		Device_ctrl(0xc0,0x01<<i);
	  i=(i+1)%8;
}

void smg_process()
{
	      smgdisplay[0]=0x40;
				smgdisplay[3]=0x00;
				smgdisplay[4]=0x00;
				smgdisplay[5]=0x40;
		if(smg_count>3)
		{
			smg_count=0;
			
	
			if(display_mode==0)
			{
				
				if(wendu<Tmin)
				{
					qujian=0;
				}
				if(Tmin<wendu<Tmax)
				{
					qujian=1;
				}
				if(wendu>Tmax)
				{
					qujian=2;
				}
				smg_display[0]=0x40;
				smg_display[1]=smg_du[qujian];
				smg_display[2]=0x40;
				smg_display[3]=0x00;
				
				smg_display[4]=0x00;
				smg_display[5]=0x00;
				smg_display[6]=smg_du[wendu/10];
				smg_display[7]=smg_du[wendu%10];
			}
			else
		  {
				
			
				if(key_press==3)
				{
					key_press=6;
				}
				if(key_press==8)
				{
					key_press=9;
				}
				
		 }
			
		}
}

unsigned int temp_count;
void  temp_process()
{
		if(temp_count>=100)
		{
			 temp_count=0;
			 
			 wendu=rd_temperature();
		}
}

void work_process()
{
		if(qujian==0)
		{
			P2=0xa0;P0=0x30;P2=0;
		}
	  if(qujian==1)
		{
			P2=0xa0;P0=0x00;P2=0;
		}
		if(qujian==2)
		{
			P2=0xa0;P0=0x30;P2=0;
		}
}
	
void Timer2Init()		//1毫秒@12.000MHz
{
	AUXR &= 0xFB;		//定时器时钟12T模式
	T2L = 0x18;		//设置定时初值
	T2H = 0xFC;		//设置定时初值
	AUXR |= 0x10;		//定时器2开始计时
	IE2|=0X04;
	EA=1;
}

unsigned int led_count;
bit ledflag;
void led_process()
{
		if(qujian==0)
		{
			if(led_count>800)
			{
				led_count=0;
				ledflag=~ledflag;
				if(ledflag)
				{
					P2=0X80;P0=~0X01;P2=0;
				}
				else
				{
					P2=0X80;P0=0xFF;P2=0;
				}
			}
		}
		
		if(qujian==1)
		{
			if(led_count>400)
			{
				led_count=0;
				ledflag=~ledflag;
				if(ledflag)
				{
					P2=0X80;P0=~0X01;P2=0;
				}
				else
				{
					P2=0X80;P0=0xFF;P2=0;
				}
			}
		}
		
			if(qujian==2)
		{
			if(led_count>200)
			{
				led_count=0;
				ledflag=~ledflag;
				if(ledflag)
				{
					P2=0X80;P0=~0X01;P2=0;
				}
				else
				{
					P2=0X80;P0=0xFF;P2=0;
				}
			}
			
		}
		
}
		
void main()
{
		Timer2Init();
    Device_ctrl(0xa0,0x00);	
	  Device_ctrl(0x80,0xff);	
		while(1)
		{
			 key_process();
			 smg_process();
			 temp_process();
			 work_process();
			 led_process();
		}

}

void timer2service()  interrupt 12
{
		smg_count++;
		smg_show();
	  key_count++;
		temp_count++;
	  led_count++;
}

onewire.c

#include "onewire.h"

//单总线内部延时函数
void Delay_OneWire(unsigned int t)  
{
		t=t*12;
		while(t--);
}

//单总线写操作
void Write_DS18B20(unsigned char dat)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		DQ = 0;
		DQ = dat&0x01;
		Delay_OneWire(5);
		DQ = 1;
		dat >>= 1;
	}
	Delay_OneWire(5);
}

//单总线读操作
unsigned char Read_DS18B20(void)
{
	unsigned char i;
	unsigned char dat;
  
	for(i=0;i<8;i++)
	{
		DQ = 0;
		dat >>= 1;
		DQ= 1;
		if(DQ)
		{
			dat |= 0x80;
		}	    
		Delay_OneWire(5);
	}
	return dat;
}

//DS18B20初始化
bit init_ds18b20(void)
{
  	bit initflag = 0;
  	
  	DQ = 1;
  	Delay_OneWire(12);
  	DQ = 0;
  	Delay_OneWire(80);
  	DQ = 1;
  	Delay_OneWire(10); 
    initflag = DQ;     
  	Delay_OneWire(5);
  
  	return initflag;
}

float rd_temperature(void)
{
	  float temp;
		unsigned char low,high;
		init_ds18b20();
	  Write_DS18B20(0XCC);
		Write_DS18B20(0X44);
	 
	  init_ds18b20();
	  Write_DS18B20(0XCC);
		Write_DS18B20(0XBE);
	  low=Read_DS18B20();
	  high=Read_DS18B20();
	  temp=(high<<8)|low;
	  temp=temp*0.0625;
	
	  return temp;
}

onewire.h

#ifndef __ONEWIRE_H
#define __ONEWIRE_H

#include <STC15F2K60S2.H>

sbit DQ = P1^4;  

float rd_temperature(void);

#endif