第五屆藍橋杯單片機組簡易溫度采集與控制系統(省賽)-有解無憂

（萌新一枚，連肝4個小時，在這里分享給大家，）
這一屆的題目總體來說，難度不大，但第一次也是唯一一次考到了矩陣鍵盤，足以引起我們的注意，我在寫代碼的程序，主要遇到的障礙就是矩陣鍵盤的使用過于粗糙，希望矩陣鍵盤沒有怎么練習過的，只會運用最基礎的操作的小伙伴能進一步加強這一塊的學習，防止比賽暴雷，，，，
如果你發現了程式需要優化的地方，請一定要告訴我！

onewire.c

/*
  程式設計：單總線驅動程式
  軟體環境：Keil uVision 4.10
  硬體環境：CT107單片機綜合實訓平臺(外部晶振12MHz)IAP15F2K61S2
  日期:2011-8-9
*/
#include "reg52.h"
#include "onewire.h"

sbit DQ = P1^4;  //單總線介面

//單總線延時函式
void Delay_OneWire(unsigned int t)  //STC89C52RC
{
	t *= 10;//時間擴大十倍
	while(t--);
}

//通過單總線xiangDS18B20寫一個位元組
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);
}

//從DS18B20讀取一個位元組
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設備初始化
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;
}

uchar read_temperatuer(void)
{
	uchar LSB, MSB;
	uchar temp;
	
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0x44);
	
	Delay_OneWire(100);
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0xbe);
	
	LSB = Read_DS18B20();
	MSB = Read_DS18B20();
	init_ds18b20();
	
	temp = (MSB << 8)|LSB;
	temp >>= 4;//右移4位,只取整數部分
	
	return temp;
}

onewire.h

#ifndef __ONEWIRE_H
#define __ONEWIRE_H
#define uchar unsigned char
#define uint unsigned int
	
extern uchar read_temperatuer(void);
void Delay_OneWire(unsigned int t);
void Write_DS18B20(unsigned char dat);
unsigned char Read_DS18B20(void);
bit init_ds18b20(void);

#endif

main.c

#include <REGX52.H>
#include <onewire.h>

sfr P4 = 0xc0;

sbit P42 = P4^2;
sbit P44 = P4^4;

sbit L1 = P0^0;
sbit L2 = P0^1;

void Delay(uint t);
void Init_hc573(uint s);
void key_scan(void);
void inputdat(uint key);//輸入資料
void save_t(void);//保存輸入的資料
void Init_Timer0(void);
void DisplaySMG_Dat(uint pos, uint dat);
void DisplaySMG_all(void);//清空所有數碼管
void DisplaySMG(void);

uint code Shu[] = 
{0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,0x80,0x90,//0-9 
0xbf, 0xff};//-和滅

uint yi=11,er=11,san=11,si=11, wu=11, liu=11, qi=11, ba=11;
uint temperature;//溫度
uint set;//控制顯示界面標志位
uint set_t1, set_t2, set_t3, set_t4;//設定溫度的臨時資料
uint Tmax = 30, Tmin = 20;
uint level;//溫度等級
uint sel;//選擇要修改的資料
uint flag;//計算設定按鍵按下的次數
uint clear;//清空資料標志位
uint count_0;//定時器時間控制
uint count_1;
uint count_2;

void main(){
	Init_hc573(4);
	P0 = 0xff;
	Init_hc573(5);
	P0 = 0x00;
	Init_Timer0();
	while(1){
		key_scan();
		if(temperature < Tmin){
			level = 0;
			Init_hc573(5);
			P0 = 0x00;
		}
		else if((temperature >= Tmin)&&(temperature <= Tmax)){
			level = 1;
			Init_hc573(5);
			P0 = 0x00;
		}
		else
		{
			level = 2;
			Init_hc573(5);
			P0 = 0x10;
		}
		
		if(set== 0){
			EA = 1;
			ET0 = 1;
			temperature =  read_temperatuer();
			
			yi = 10;er = level;san = 10;
			si = 11;wu = 11;liu = 11;
			qi = temperature/10;ba = temperature%10;
		}
		else{
			//關閉定時器并清空資料
			EA = 0;
			ET0 = 0;
			count_0 = 0;
			count_1 = 0;
			count_2 = 0;
			yi = 10;er = set_t1;san = set_t2;
			si = 11;wu = 11;liu = 10;
			qi = set_t3;ba = set_t4;
		}
		
		DisplaySMG();
	}
}

void Delay(uint t){
	while(t --);
}

void Init_hc573(uint s){
	switch(s){
		case 4:P2 = (P2 &0x1f)|0x80;break;//LED
		case 5:P2 = (P2 &0x1f)|0xa0;break;//蜂鳴器和繼電器
		case 6:P2 = (P2 &0x1f)|0xc0;break;//數碼管com埠
		case 7:P2 = (P2 &0x1f)|0xe0;break;//段碼
	}
}
static uint key;
void key_scan(void){
	
	uint temp;
	P3 = 0x7f;P42 = 1;P44 = 0;//掃描第一列
	temp = P3;
	temp &= 0x0f;//判斷第四位是否發生變化 0111 1111&0000 1111 = 0000 1111
	if(temp != 0x0f){
		Delay(200);
		if(temp != 0x0f){
			temp = P3;
			switch(temp)//便于直接控制到每個按鍵
			{
				case 0x7e:if(set == 1){sel ++;key = 0;inputdat();}break;
				case 0x7d:if(set == 1){sel ++;key = 3;inputdat();}break;
				case 0x7b:if(set == 1){sel ++;key = 6;inputdat();}break;
				case 0x77:if(set == 1){sel ++;key = 9;inputdat();}break;
			}
			while(temp != 0x0f){//重新判斷，否則temp永遠不能等于0x0f
				temp = P3;
				temp &= 0x0f;//若松開，則temp = 0x0f;
			}
		}
	}
	
	P3 = 0xbf;P42 = 0;P44 = 1;//判斷第二列
	temp = P3;
	temp &= 0x0f;//判斷第四位是否發生變化
	if(temp != 0x0f){
		Delay(200);
		if(temp != 0x0f){
			temp = P3;
			switch(temp)
			{
				case 0xbe:if(set == 1){sel ++;key = 1;inputdat();}break;
				case 0xbd:if(set == 1){sel ++;key = 4;inputdat();}break;
				case 0xbb:if(set == 1){sel ++;key = 7;inputdat();}break;
				case 0xb7:set = 1;flag ++;if(flag == 2){save_t();}break;
			}
			while(temp != 0x0f){
				temp = P3;
				temp &= 0x0f;
			}
		}
	}
	
	P3 = 0xdf;P42 = 1;P44 = 1;//掃描第三列
	temp = P3;
	temp &= 0x0f;
	if(temp != 0x0f){
		Delay(200);
		if(temp != 0x0f){
			temp = P3;
			switch(temp)
			{
				case 0xde:if(set == 1){sel ++;key = 2;inputdat();}break;
				case 0xdd:if(set == 1){sel ++;key = 5;inputdat();}break;
				case 0xdb:if(set == 1){sel ++;key = 8;inputdat();}break;
				case 0xd7:if(set == 1){sel ++;clear = 1;inputdat();}break;
			}
			while(temp != 0x0f){
				temp = P3;
				temp &= 0x0f;
			}
		}
	}
}

void inputdat(void){
	if(clear == 0){
		switch(sel){
			case 1:set_t1 = key;break;
			case 2:set_t2 = key;break;
			case 3:set_t3 = key;break;
			case 4:set_t4 = key;break;
		}
	}
	else{//清空資料
		set_t1 = 0;
		set_t2 = 0;
		set_t3 = 0;
		set_t4 = 0;
		sel = 0;//重新輸入
		clear = 0;
	}
}
void save_t(void){
	if((set_t1*10+ set_t2) > (set_t3*10+ set_t4)){
		Tmin = set_t3*10+ set_t4;
		Tmax = set_t1*10+ set_t2;
		sel = 0;
		set = 0;
		
		Init_hc573(4);
		L2 = 1;
	}
	else{//輸入錯誤，重新輸入
		set_t1 = 0;
		set_t2 = 0;
		set_t3 = 0;
		set_t4 = 0;
		sel = 0;
		set = 1;
		
		Init_hc573(4);
		L2 = 0;
	}
	flag = 0;//清空設定按鍵標志位
}


void Init_Timer0(void){//@12MHz
	TMOD = 0x01;
	TH0 = (65535 -20000)/256;
	TL0 = (65535- 20000)%256;
	
//  EA = 1;
//  ET0 = 1;
	TR0 = 1;
}

void service_Timer0(void) interrupt 1{
	TH0 = (65535 -20000)/256;
	TL0 = (65535- 20000)%256;
	
	count_0 ++;
	count_1 ++;
	count_2 ++;
	if(count_0 == 4){
		count_0 = 0;
		if(level == 0){
			if(L1 == 0){
				Init_hc573(4);
				P0 = 0xff;//避免其他LED閃爍
				L1 = 1;
			}
			else
			{
				Init_hc573(4);
				P0 = 0xff;
				L1 = 0;
			}
		}
	}
	if(count_1 == 2){
		count_1 = 0;
		if(level == 1){
			if(L1 == 0){
				Init_hc573(4);
				P0 = 0xff;
				L1 = 1;
			}
			else{
				Init_hc573(4);
				P0 = 0xff;
				L1 = 0;
			}
		}
	}
	if(count_2 == 1){
		count_2 = 0;
		if(level == 2){
			if(L1 == 0){
				Init_hc573(4);
				P0 = 0xff;
				L1 = 1;
			}
			else{
				Init_hc573(4);
				P0 = 0xff;
				L1 = 0;
			}
		}
	}
}

void DisplaySMG_Dat(uint pos, uint dat){
	Init_hc573(6);
	P0 = 0x01 << pos;
	Init_hc573(7);
	P0 = dat;
	
	Delay(50);
	P0 = 0xff;
}

void DisplaySMG_all(void){
	Init_hc573(6);
	P0 = 0xff;
	Init_hc573(7);
	P0 = 0xff;
}

void DisplaySMG(void){
	DisplaySMG_Dat(0, Shu[yi]);
	Delay(100);
	DisplaySMG_Dat(1, Shu[er]);
	Delay(100);
	DisplaySMG_Dat(2, Shu[san]);
	Delay(100);
	DisplaySMG_Dat(3, Shu[si]);
	Delay(100);
	DisplaySMG_Dat(4, Shu[wu]);
	Delay(100);
	DisplaySMG_Dat(5, Shu[liu]);
	Delay(100);
	DisplaySMG_Dat(6, Shu[qi]);
	Delay(100);
	DisplaySMG_Dat(7, Shu[ba]);
	Delay(100);
	
	DisplaySMG_all();
}

end

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第五屆藍橋杯單片機組 簡易溫度采集與控制系統(省賽)

onewire.c

onewire.h

main.c

第五屆藍橋杯單片機組簡易溫度采集與控制系統(省賽)