蓝桥杯单片机省赛第十一届第二场

 

 

main.c

#include <STC15F2K60S2.H>
#include <ONEWIRE.H>
#include <IIC.H>
void Device_ctrl(unsigned char p2date,unsigned char p0date)
{
		P0=p0date;
	  P2=P2&0X1F|p2date;
	  P2&=0X1F;
}

unsigned char smg_display[8];
unsigned char smg_du[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
unsigned int smg_count;
unsigned char display_mode;
unsigned int temp;
unsigned int temp_count;
unsigned int Tmax_set=30;
unsigned int Tmin_set=20;
unsigned int Tmax=30;
unsigned int Tmin=20;
unsigned int da_count;
unsigned int led_count;
unsigned char led_ctrl=0xff;
bit led_flag;
void da(unsigned char date)
{
		IIC_Start();
    IIC_SendByte(0x90);
    IIC_WaitAck();
    IIC_SendByte(0x40);
    IIC_WaitAck();
    IIC_SendByte(date);
    IIC_WaitAck();
    IIC_Stop();  	
}
void da_process()
{
		if(da_count>10)
		{
			da_count=0;
			
			if(temp<Tmin)
			{
					da(51*2);
			}
			if((Tmin<=temp)&&(temp<=Tmax))
			{
					da(51*3);
			}
			if(temp>Tmax)
			{
					da(51*4);
			}
		}
}

void led_process()
{
		if(led_count>10)
		{
				led_count=0;
			  if(temp<Tmin)
				{
					led_ctrl&=~0x04;
				}
				else
				{
					led_ctrl|=0x04;
				}
			 if((temp<=Tmax)&&(temp>=Tmin))
				{
					led_ctrl&=~0x02;
				}
				else
				{
					led_ctrl|=0x02;
				}
				if(temp>Tmax)
				{
					led_ctrl&=~0x01;
				}
				else
				{
					led_ctrl|=0x01;
				}
				if(led_flag)
				{
					led_ctrl&=~0x08;
				}
				else
				{
					led_ctrl|=0x08;
				}
			  Device_ctrl(0x80,led_ctrl);
		}
}
void temp_process()
{
		if(temp_count>100)
		{
			temp_count=0;
			temp=read_temp();
			Init_temp();
		}	
}
void smg_show()
{
		unsigned char i;
	  Device_ctrl(0xc0,0);
	  Device_ctrl(0xe0,~smg_display[i]);
	  Device_ctrl(0xc0,0x01<<i);
	  i=(i+1)%8;
}

void smg_process()
{
		if(smg_count>3)
		{
			smg_count=0;
			
			if(display_mode==0)
			{
				smg_display[0]=0x39;
				smg_display[1]=0x00;
				smg_display[2]=0x00;
				smg_display[3]=0x00;
				
				smg_display[4]=0x00;
				smg_display[5]=0x00;
				smg_display[6]=smg_du[temp/10];
				smg_display[7]=smg_du[temp%10];
			}
			else if(display_mode==1)
			{
				smg_display[0]=0x73;
				smg_display[1]=0x00;
				smg_display[2]=0x00;
				
				smg_display[3]=smg_du[Tmax_set/10];
				smg_display[4]=smg_du[Tmax_set%10];
				smg_display[5]=0x00;
				smg_display[6]=smg_du[Tmin_set/10];
				smg_display[7]=smg_du[Tmin_set%10];
			}
		}
}
unsigned char Trig_btn;
unsigned char Cont_btn;
unsigned int key_count;
bit key_set;
void key_btn()
{
		unsigned char readdate=P3^0XFF;
	  Trig_btn=readdate&(Cont_btn^readdate);
	  Cont_btn=readdate;
}

void key_process()
{
		if(key_count>10)
		{
			key_count=0;
			
			key_btn();
			
			if(Trig_btn==0x08)//s4
			{
					display_mode++;
				  if(display_mode==2)
					{
						if(Tmax_set>=Tmin_set)
						{
							Tmax=Tmax_set;
							Tmin=Tmin_set;
							led_flag=0;
						}
						else
						{
							Tmax=Tmax;
							Tmin=Tmin;
							Tmax_set=Tmax;
							Tmin_set=Tmin;
							led_flag=1;
						}
						display_mode=0;
					}
			}
			
			if(Trig_btn==0x04)//s5
			{
					key_set=~key_set;
			}
			
			if(Trig_btn==0x02)//s6
			{
					if(display_mode==1)
					{
						if(key_set==0)
						{
							if(Tmax_set<99)
							{
								Tmax_set++;
							}
						}
						else
						{
							if(Tmin_set<99)
							{
								Tmin_set++;
							}
						}
						
					}
			}
			
			if(Trig_btn==0x01)//s7
			{
					if(display_mode==1)
					{
						if(key_set==0)
						{
							if(Tmax_set>0)
							{
								Tmax_set--;
							}
						}
						else
						{
							if(Tmin_set>0)
							{
								Tmin_set--;
							}
						}
						
						
					}
			}
		}
}
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;
}

void main()
{
		Timer2Init();
		while(1)
		{
			key_process();
			smg_process();
			temp_process();
			da_process();
			led_process();
		}
}

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

iic.c

#include "iic.h"

#define DELAY_TIME 5

//I2C总线内部延时函数
void IIC_Delay(unsigned char i)
{
    do{_nop_();}
    while(i--);        
}

//I2C总线启动信号
void IIC_Start(void)
{
    SDA = 1;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 0;
    IIC_Delay(DELAY_TIME);
    SCL = 0;	
}

//I2C总线停止信号
void IIC_Stop(void)
{
    SDA = 0;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}

//发送应答或非应答信号
void IIC_SendAck(bit ackbit)
{
    SCL = 0;
    SDA = ackbit;  					
    IIC_Delay(DELAY_TIME);
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SCL = 0; 
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}

//等待应答
bit IIC_WaitAck(void)
{
    bit ackbit;
	
    SCL  = 1;
    IIC_Delay(DELAY_TIME);
    ackbit = SDA;
    SCL = 0;
    IIC_Delay(DELAY_TIME);
    return ackbit;
}

//I2C总线发送一个字节数据
void IIC_SendByte(unsigned char byt)
{
    unsigned char i;

    for(i=0; i<8; i++)
    {
        SCL  = 0;
        IIC_Delay(DELAY_TIME);
        if(byt & 0x80) SDA  = 1;
        else SDA  = 0;
        IIC_Delay(DELAY_TIME);
        SCL = 1;
        byt <<= 1;
        IIC_Delay(DELAY_TIME);
    }
    SCL  = 0;  
}

//I2C总线接收一个字节数据
unsigned char IIC_RecByte(void)
{
    unsigned char i, da;
    for(i=0; i<8; i++)
    {   
    	SCL = 1;
	IIC_Delay(DELAY_TIME);
	da <<= 1;
	if(SDA) da |= 1;
	SCL = 0;
	IIC_Delay(DELAY_TIME);
    }
    return da;    
}

iic.h

#ifndef __IIC_H
#define __IIC_H

#include <STC15F2K60S2.H>

#include "intrins.h"

sbit SDA = P2^1;
sbit SCL = P2^0;

void IIC_Start(void); 
void IIC_Stop(void);  
bit IIC_WaitAck(void);  
void IIC_SendAck(bit ackbit); 
void IIC_SendByte(unsigned char byt); 
unsigned char IIC_RecByte(void); 

#endif

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;
}

void Init_temp()
{
		init_ds18b20();
	  Write_DS18B20(0xcc);
	  Write_DS18B20(0x44);
}

float read_temp()
{
		float temp;
	  unsigned char low,high;
	  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 read_temp(); 
void Init_temp();
#endif