第十一届蓝桥杯单片机省赛(第二场)----程序题

main.c程序

#include<stc15f2k60s2.h>
#include "ds18b20.h"
#include "iic.h"

#define uchar unsigned char
#define uint unsigned int
	
uchar code tab[]={
    
    0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff,0xc6,0x8c};
uchar yi,er,san,si,wu,liu,qi,ba;
uchar s4=0,s5=0,jia=0,jian=0,T_max,T_min;
bit fla=0,LED4_flag=0;
uint tt=0;

uchar wendu,AD,MAX=30,MIN=20;

void delayms(int ms);
void allinit();
void display1(uchar yi,uchar er);
void display2(uchar san,uchar si);
void display3(uchar wu,uchar liu);
void display4(uchar qi,uchar ba);
void keyscan();
void Timer0Init(void);


void main()
{
    
    
	allinit();
  Timer0Init();
	while(1)
	{
    
    
		AD=AD_read(0x40);
		wendu=Tempget();
		if(s4==0)
		{
    
    
			if(LED4_flag==0)
			{
    
    
				if(MAX<wendu){
    
    P2=0X80;P0=0XFE;AD_write(204);delayms(5);}
				else if((MIN<=wendu)&&(wendu<=MAX)){
    
    P2=0X80;P0=0XFD;AD_write(153);delayms(5);}
				else if(wendu<MIN){
    
    P2=0X80;P0=0XFB;AD_write(102);delayms(5);}
			}	
			yi=12;er=11;san=11;si=11;wu=11;liu=11;qi=wendu/10;ba=wendu%10;
		}
		else if(s4==1)
		{
    
    		
			if((jia==1)&&(s5==0)){
    
    jia=0;
				if(T_max==99)T_max=99;
				else T_max=T_max+1;}
			
			if((jia==1)&&(s5==1)){
    
    jia=0;
				if(T_min==99)T_min=99;
				else T_min=T_min+1;}
			
			if((jian==1)&&(s5==0)){
    
    jian=0;
				if(T_max==0)T_max=0;
				else T_max=T_max-1;}
			
			if((jian==1)&&(s5==1)){
    
    jian=0;
				if(T_min==0)T_min=0;
				else T_min=T_min-1;}
			yi=13;er=11;san=11;si=T_max/10;wu=T_max%10;liu=11;qi=T_min/10;ba=T_min%10;
		}
					
		keyscan();
		display1(yi,er);
		display2(san,si);
		display3(wu,liu);
		display4(qi,ba);
	}
}
void Timer0Init(void)		//5毫秒@12.000MHz
{
    
    
	AUXR |= 0x80;		//定时器时钟1T模式
	TMOD &= 0xF0;		//设置定时器模式
	TL0 = 0xA0;		//设置定时初值
	TH0 = 0x15;		//设置定时初值
	TF0 = 0;		//清除TF0标志
	TR0 = 1;		//定时器0开始计时
}
void Time0() interrupt 1
{
    
    
	tt++;
	if((tt==1)&&(LED4_flag==1))
	{
    
    
		tt=0;
		P2|=0X80;P2&=0X9F;P0=0XFF;
		P2|=0X80;P2&=0X9F;P0=0XF7;
	}
}

void delayms(int ms)
{
    
    
	uint i,j;
	for(i=ms;i>0;i--)
	for(j=845;j>0;j--);
}
void allinit()
{
    
    
	P2=0XA0;P0=0X00;
	P2=0X80;P0=0XFF;
	
	P2=0XC0;P0=0XFF;
	P2=0XFF;P0=0XFF;
}
void display1(uchar yi,uchar er)
{
    
    
	P2=0XC0;P0=0X01;
	P2=0XFF;P0=tab[yi];
	delayms(1);
	
	P2=0XC0;P0=0X02;
	P2=0XFF;P0=tab[er];
	delayms(1);
}
void display2(uchar san,uchar si)
{
    
    
	P2=0XC0;P0=0X04;
	P2=0XFF;P0=tab[san];
	delayms(1);
	
	P2=0XC0;P0=0X08;
	P2=0XFF;P0=tab[si];
	delayms(1);
}

void display3(uchar wu,uchar liu)
{
    
    
	P2=0XC0;P0=0X10;
	P2=0XFF;P0=tab[wu];
	delayms(1);
	
	P2=0XC0;P0=0X20;
	P2=0XFF;P0=tab[liu];
	delayms(1);
}
void display4(uchar qi,uchar ba)
{
    
    
	P2=0XC0;P0=0X40;
	P2=0XFF;P0=tab[qi];
	delayms(1);
	
	P2=0XC0;P0=0X80;
	P2=0XFF;P0=tab[ba];
	delayms(1);
	P2=0XC0;P0=0X80;
	P2=0XFF;P0=0XFF;
}
void keyscan()
{
    
    
	if(P30==0)
	{
    
    
		delayms(5);
		if(P30==0)
		{
    
    
			if((jian==0)&&(s4==1)){
    
    jian=jian+1;}
		}
		while(!P30);
	}
	else if(P31==0)
	{
    
    
		delayms(5);
		if(P31==0)
		{
    
    
			if((jia==0)&&(s4==1)){
    
    jia=jia+1;}	
		}
		while(!P31);
	}
	else if(P32==0)
	{
    
    
		delayms(5);
		if(P32==0)
		{
    
    
			if((s5==0)&&(s4==1)){
    
    s5=1;}
			else if((s5==1)&&(s4==1)){
    
    s5=0;}	
		}
		while(!P32);
	}
	else if(P33==0)
	{
    
    
		delayms(5);
		if(P33==0)
		{
    
    
			if(s4==0){
    
    s4=1;T_max=MAX;T_min=MIN;}
			else if(s4==1){
    
    s4=0;
				if(T_max>=T_min){
    
    MAX=T_max;MIN=T_min;LED4_flag=0;EA=0;ET0=0;tt=0;}
				else{
    
    MAX=MAX;MIN=MIN;LED4_flag=1;EA=1;ET0=1;tt=0;}
			}	
		}
		while(!P33);
	}
}

ds18b20.c程序

#include<stc15f2k60s2.h>
#include "ds18b20.h"

sbit DQ = P1^4;  //单总线接口

//单总线延时函数
void Delay_OneWire(unsigned int t)  
{
    
    
	while(t--);
}


//通过单总线向DS18B20写一个字节
void Write_DS18B20(unsigned char dat)
{
    
    
	unsigned char i;
	for(i=0;i<8;i++)
	{
    
    
		DQ = 0;
		DQ = dat&0x01;
		Delay_OneWire(50);
		DQ = 1;
		dat >>= 1;
	}
	Delay_OneWire(50);
}

//从DS18B20读取一个字节
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(50);
	}
	return dat;
}

//DS18B20设备初始化
bit init_ds18b20(void)
{
    
    
  	bit initflag = 0;
  	
  	DQ = 1;
  	Delay_OneWire(120);
  	DQ = 0;
  	Delay_OneWire(800);
  	DQ = 1;
  	Delay_OneWire(100); 
    	initflag = DQ;     
  	Delay_OneWire(50);
  
  	return initflag;
}
unsigned char Tempget()
{
    
    
	unsigned char temp,low,high;
	
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0x44);
	Delay_OneWire(200); 
	
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0xbe);
	
	low=Read_DS18B20();
	high=Read_DS18B20();
	
	temp=high<<4;
	temp|=(low>>4);
	
	return temp;
}

iic.c程序

#include<stc15f2k60s2.h>
#include "iic.h"
#include "intrins.h"

#define somenop {_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();}    


#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1

//总线引脚定义
sbit SDA = P2^1;  /* 数据线 */
sbit SCL = P2^0;  /* 时钟线 */


//总线启动条件
void IIC_Start(void)
{
    
    
	SDA = 1;
	SCL = 1;
	somenop;
	SDA = 0;
	somenop;
	SCL = 0;	
}

//总线停止条件
void IIC_Stop(void)
{
    
    
	SDA = 0;
	SCL = 1;
	somenop;
	SDA = 1;
}


//等待应答
bit IIC_WaitAck(void)
{
    
    
	SDA = 1;
	somenop;
	SCL = 1;
	somenop;
	if(SDA)    
	{
    
       
		SCL = 0;
		IIC_Stop();
		return 0;
	}
	else  
	{
    
     
		SCL = 0;
		return 1;
	}
}

//通过I2C总线发送数据
void IIC_SendByte(unsigned char byt)
{
    
    
	unsigned char i;
	for(i=0;i<8;i++)
	{
    
       
		if(byt&0x80) 
		{
    
    	
			SDA = 1;
		}
		else 
		{
    
    
			SDA = 0;
		}
		somenop;
		SCL = 1;
		byt <<= 1;
		somenop;
		SCL = 0;
	}
}

//从I2C总线上接收数据
unsigned char IIC_RecByte(void)
{
    
    
	unsigned char da;
	unsigned char i;
	
	for(i=0;i<8;i++)
	{
    
       
		SCL = 1;
		somenop;
		da <<= 1;
		if(SDA) 
		da |= 0x01;
		SCL = 0;
		somenop;
	}
	return da;
}
unsigned char AD_read(unsigned char add)
{
    
    
	unsigned char temp;
		
	IIC_Start();
	IIC_SendByte(0x90);
	IIC_WaitAck();
	IIC_SendByte(add);
	IIC_WaitAck();
	IIC_Stop();
	
	IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	temp=IIC_RecByte();
	IIC_Stop();
	
	return temp;
}
void AD_write(unsigned char dat)
{
    
    	
	IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	IIC_SendByte(0x40);
	IIC_WaitAck();
	IIC_SendByte(dat);
	IIC_WaitAck();
	IIC_Stop();
}

ds18b20.h程序

#ifndef __DS18B20_H
#define __DS18B20_H


//单总线延时函数
void Delay_OneWire(unsigned int t);
void Write_DS18B20(unsigned char dat);
unsigned char Read_DS18B20(void);
bit init_ds18b20(void);
unsigned char Tempget();

#endif

iic.h程序

#ifndef _IIC_H
#define _IIC_H

//函数声明
void IIC_Start(void); 
void IIC_Stop(void);  
void IIC_SendByte(unsigned char byt); 
bit IIC_WaitAck(void);  
unsigned char IIC_RecByte(void); 
unsigned char AD_read(unsigned char add);
void AD_write(unsigned char dat);

#endif

第十一届蓝桥杯单片机省赛(第二场)作品演示