蓝桥杯之单片机设计与开发（26）——2015_第六届_蓝桥杯_省赛——“温度记录器”

朱雀 2022-03-11 05:24 374阅读 0赞

### 1、题目 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1hpYW9tb19oYWE_size_16_color_FFFFFF_t_70][]

这个题目还是很简单的，一般在DS1302和DS18B20的驱动写好情况下，两个小时就可以写好。

就用到了DS1302显示实时时间，四个独立按键功能很简单，注意模式切换就可以了，数码管显示也是模式切换就行了。

### 2、代码 ###

下载链接：[https://download.csdn.net/download/xiaomo\_haa/11004437][https_download.csdn.net_download_xiaomo_haa_11004437]

main.c

#include <stc15.h>
    #include "sys.h"
    
    bit flag_start = 0;
    bit flag_50ms = 0;
    bit flag_temper = 0;
    bit flag_led = 0;
    u8 mode = 1, Temper_time = 1;
    u8 temperno = 0;
    int Realtemper[11];
    u8 Realtime[] = {0x19, 0x03, 0x07, 0x23, 0x59, 0x50, 0x04};
    
    
    void main(void)
    {
    	u8 index = 0, t = 1, leddat = 0xff;
    	int temp = 0;
    	
    	AllInit();
    	Start18B20();
    	EA = 0;
    	Timer0Init();
    	InitDS1302(&Realtime);
    	EA = 1;
    	while(1)
    	{
    		KeyPress();
    		
    		if(flag_50ms)
    		{
    			flag_50ms = 0;
    			GetRealTime(&Realtime);		//读取1302时间
    			if(flag_led)
    			{
    				leddat = 0xfe | t;
    				t = ~t;
    			}
                else
                    leddat = 0xff;
    		}
    		
    		if(flag_temper == 1)
    		{
    			flag_temper = 0;
    			Get18B20Temp(&temp);
    			temp >>= 4;
    			Realtemper[index] = temp;
    			index ++;
    			Start18B20();
    			if(index >= 10)
    			{
    				mode = 3;						//自动切换到温度显示界面
    				flag_start = 0;			//停止采集温度
    				flag_led = 1;		//显示温度
    			}
    		}
    		
    		if(flag_start == 0)
    			index = 0;
    
            LEDLight(leddat);
    	}
    }

sys.c

#include "sys.h"
    
    void AllInit(void)
    {
    	P2 = (P2 & 0x1f) | 0x80;
    	P0 = 0xff;
    	P2 = (P2 & 0x1f) | 0xc0;
    	P0 = 0x00;
    	P2 = (P2 & 0x1f) | 0xa0;
    	P0 = 0x00;
    	P2 = P2 & 0x1f;
    }
    
    
    void Timer0Init(void)		//2毫秒@11.0592MHz
    {
    	AUXR |= 0x80;		//定时器时钟1T模式
    	TMOD &= 0xF0;		//设置定时器模式
    	TL0 = 0x9A;		//设置定时初值
    	TH0 = 0xA9;		//设置定时初值
    	TF0 = 0;		//清除TF0标志
    	TR0 = 1;		//定时器0开始计时
    	ET0 = 1;
    }
    
    void Timer0(void) interrupt 1
    {
    	static u8 T0count1 = 0;
    	static u16 T0count2 = 0;
    	u16 time_temp = 0;
    	
    	T0count1 ++;
    	T0count2 ++;
    	time_temp = Temper_time * 500;
    	
    	if(T0count1 >= 25)
    	{
    		T0count1 = 0;
    		flag_50ms = 1;
    	}
    	
    	if(flag_start)
    	{
    		if(T0count2 >= time_temp)
    		{
    			T0count2 = 0;
    			flag_temper = 1;
    		}
    	}
    	else
    	{
    		T0count2 = 0;
    		flag_temper = 0;
    	}
    
    	KeyScan();
    	TubeShow();
    	TubeScan();
    }

sys.h

#ifndef _SYS_H_
    #define _SYS_H_
    
    typedef unsigned char u8;
    typedef unsigned int u16;
    typedef unsigned long u32;
    
    #include <stc15.h>
    #include <intrins.h>
    #include "ds18b20.h"
    #include "ds1302.h"
    
    extern bit flag_start;
    extern bit flag_50ms;
    extern bit flag_temper;
    extern bit flag_led;
    extern u8 mode, Temper_time;
    extern u8 temperno;
    extern int Realtemper[11];
    extern u8 Realtime[];
    
    //function
    void AllInit(void);
    void Timer0Init(void);
    
    void TubeScan(void);
    void TubeShow(void);
    void LEDLight(unsigned char dat);
    unsigned char BCDToNum(unsigned char bcd);
    
    void KeyScan(void);
    void KeyAction(unsigned char key);
    void KeyPress(void);
    
    //pin
    sbit S7 = P3^0;
    sbit S6 = P3^1;
    sbit S5 = P3^2;
    sbit S4 = P3^3;
    
    #endif

display.c

#include "sys.h"
    
    unsigned char code table[]={0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 
                                0x80, 0x90, 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e,
    														0xff, 0xbf};
    u8 TubeBuff[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
    u8 smg1, smg2, smg3, smg4, smg5, smg6, smg7, smg8;
    
    void TubeScan(void)
    {
    	static u8 index = 0;
    	
    	P2 = (P2 & 0x1f) | 0xe0;
    	P0 = 0xff;
    	P2 = (P2 & 0x1f) | 0xc0;
    	P0 = (0x01 << index);
    	P2 = (P2 & 0x1f) | 0xe0;
    	P0 = TubeBuff[index];
    	P2 = P2 & 0x1f;
    	
    	index ++;
    	index &= 0x07;
    }
    
    void TubeShow(void)
    {	
    	if(mode == 1)						//设置时间间隔界面
    	{
    		smg1 = smg2 = smg3 = smg4 = smg5 = 16;
    		smg6 = 17;
    		smg7 = Temper_time / 10;
    		smg8 = Temper_time % 10;
    	}
    	else if(mode == 2)			//采集温度时显示温度
    	{
    		smg1 = BCDToNum(Realtime[3]) / 10;
    		smg2 = BCDToNum(Realtime[3]) % 10;
    		smg4 = BCDToNum(Realtime[4]) / 10;
    		smg5 = BCDToNum(Realtime[4]) % 10;
    		smg7 = BCDToNum(Realtime[5]) / 10;
    		smg8 = BCDToNum(Realtime[5]) % 10;
    		
    		if(smg8 % 2 == 0)
    			smg3 = smg6 = 16;
    		else
    			smg3 = smg6 = 17;
    	}
    	else if(mode == 3)
    	{
    		smg1 = smg6 = 17;
    		smg4 = smg5 = 16;
    		smg2 = temperno / 10;
    		smg3 = temperno % 10;
    		smg7 = Realtemper[temperno] / 10;
    		smg8 = Realtemper[temperno] % 10;
    	}
    	
    	TubeBuff[0] = table[smg1];
    	TubeBuff[1] = table[smg2];
    	TubeBuff[2] = table[smg3];
    	TubeBuff[3] = table[smg4];
    	TubeBuff[4] = table[smg5];
    	TubeBuff[5] = table[smg6];
    	TubeBuff[6] = table[smg7];
    	TubeBuff[7] = table[smg8];
    }
    
    void LEDLight(unsigned char dat)
    {
    	P0 = 0xff;
    	P2 = (P2 & 0x1f) | 0x80;
    	P0 = dat;
    	P2 = P2 & 0x1f;
    }
    
    unsigned char BCDToNum(unsigned char bcd)
    {
    	unsigned char a, b;
    	
    	a = (bcd >> 4);
    	b = bcd & 0x0f;
    	
    	return (a * 10 + b);
    }

key.c

#include "sys.h"
     
    u8 KeySta[] = {1, 1, 1, 1};
    u8 KeyBackup[] = {1, 1, 1, 1};
    u8 KeyBuff[] = {0xff, 0xff, 0xff, 0xff};
     
    void KeyScan(void)
    {
    	u8 i;
    	
    	KeyBuff[0] = (KeyBuff[0] << 1) | S7;
    	KeyBuff[1] = (KeyBuff[1] << 1) | S6;
    	KeyBuff[2] = (KeyBuff[2] << 1) | S5;
    	KeyBuff[3] = (KeyBuff[3] << 1) | S4;
    	
    	for(i = 0; i < 4; i ++)
    	{
    		if(KeyBuff[i] == 0xff)				//Key release
    			KeySta[i] = 1;
    		else if(KeyBuff[i] == 0x00)		//Key press
    			KeySta[i] = 0;
    		else
    		{}
    	}
    }
     
    void KeyAction(unsigned char key)
    {
    	static u8 index = 1;
    	
    	if((key == 3) && (mode == 1))		//S4
    	{
    		index ++;
    		switch(index)
    		{
    			case 1: Temper_time = 1; break;
    			case 2: Temper_time = 5; break;
    			case 3: Temper_time = 30; break;
    			case 4: Temper_time = 60; break;
    			default: index = 1; Temper_time = 1; break;
    		}
    	}
    	else if((key == 2) && (mode == 1))			//S5
    	{
    		flag_start = 1;
    		mode = 2;
    	}
    	else if((key == 1) && (mode == 3))			//S6
    	{
    		if(flag_led)
    			flag_led = 0;
    		temperno ++;
    		if(temperno >= 10)
    			temperno = 0;
    	}
    	else if((key == 0) && (mode == 3))			//S7
    	{
    		mode = 1;
    		temperno = 0;
    	}
    }
     
    void KeyPress(void)
    {
    	u8 i;
    	
    	for(i = 0; i < 4; i ++)
    	{
    		if(KeySta[i] != KeyBackup[i])
    		{
    			if(KeySta[i] == 0)					//action when key press
    				KeyAction(i);
    			KeyBackup[i] = KeySta[i];
    		}
    	}
    }

ds18b20.c

#include "sys.h"
    
    sbit DS18B20_IO = P1^4;
    
    void Delayus(unsigned int us)
    {
    	do{
    		_nop_();
    		_nop_();
    		_nop_();
    		_nop_();
    		_nop_();
    		_nop_();
    		_nop_();
    		_nop_();
    	}while(--us);
    }
    
    bit Get18B20Ack(void)
    {
    	bit ack;
    	
    	DS18B20_IO = 0;			//产生500us的复位脉冲
    	Delayus(500);
    	EA = 0;							//禁止总中断
    	DS18B20_IO = 1;			//延时60us
    	Delayus(60);
    	EA = 1;							//重新使能总中断
    	ack = DS18B20_IO;		//读取存在脉冲
    	while(!DS18B20_IO);	//等待存在脉冲结束
    	
    	return ack; 	
    }
    
    void DS18B20Write(unsigned char dat)
    {
     	unsigned char mask;
    						
    	for(mask = 0x01; mask != 0; mask <<= 1)	//低位在先，依次移出8个bit
    	{
    		EA = 0;
    		DS18B20_IO = 0;				//产生2us低电平脉冲
    		Delayus(2);
    	 	if(dat & mask)				//输出该bit值
    		 	DS18B20_IO = 1;
    		else
    		 	DS18B20_IO = 0;
    		EA = 1;
    		Delayus(60);					//延时60us
    		DS18B20_IO = 1;				//拉高通信引脚
    	}
    }
    
    unsigned char DS18B20Read(void)
    {
     	unsigned char mask, dat = 0;
    	
    	for(mask = 0x01; mask != 0; mask <<= 1)	//低位在先，依次采集8个bit
    	{
    		EA = 0;
    		DS18B20_IO = 0;				//产生2us低电平脉冲
    		Delayus(2);
    		DS18B20_IO = 1;				//结束低电平脉冲，等待18B20输出数据
    		Delayus(2);						//延时2us
    		EA = 1;
    	 	if(DS18B20_IO)				//读取通信引脚上的值
    		 	dat |= mask;
    		Delayus(60);					//再延时60us
    	}
    	
    	return dat;	
    }
    
    bit Start18B20()
    {
     	bit ack;
    	static bit flag = 1;
    
    	ack = Get18B20Ack();		//执行总线复位，并获取18B20应答
    	if(ack == 0)						//如18B20正确应答，则启动一次转换
    	{
    		DS18B20Write(0xCC);		//跳过ROM操作
    		
    		if(flag)
    		{
    			flag = 0;
    			DS18B20Write(0x4e);			//写暂存器指令4E
    			DS18B20Write(0x4b);			//写高速缓存器TH高温限值75度
    			DS18B20Write(0x00);			//写高速缓存器TL低温限值0度
    			DS18B20Write(0x1f);			//写配置寄存器4
    															//0x1f ： 0.5000°C  转换时间93.75ms
    															//0x3f ： 0.2000°C  转换时间187.5ms
    															//0x5f ： 0.1250°C  转换时间375ms
    															//0x7f ： 0.0625°C  转换时间750ms
    		}
    		
    		ack = Get18B20Ack();		//执行总线复位，并获取18B20应答
    		if(ack == 0)						//如18B20正确应答，则启动一次转换
    		{
    			DS18B20Write(0xCC);		//跳过ROM操作
    			DS18B20Write(0x44);		//启动一次温度转换
    		}
    	}
    
    	return ~ack;						//ack == 0 表示操作成功，所以返回值对其取反
    }
    
    bit Get18B20Temp(int *temp)
    {
     	bit ack;
    	unsigned char LSB, MSB;			//16bit温度值的低字节和高字节
    
    	ack = Get18B20Ack();				//执行总线复位，并获取18B20应答
    	if(ack == 0)								//如18B20正确应答，则读取温度值
    	{
    	 	DS18B20Write(0xCC);				//跳过ROM操作
    		DS18B20Write(0xBE);				//发送读命令
    		LSB = DS18B20Read();			//读温度值的低字节
    		MSB = DS18B20Read();			//读温度值的高字节
    		*temp = ( MSB << 8) + LSB;	//合成16bit的整数
    	}
    
    	return ~ack;								//ack == 0 表示操作应答，所以返回值为1其取反值
    }

ds18b20.h

#ifndef __DS18B20_H
    #define __DS18B20_H
    
    
    //单总线延时函数
    void Delayus(unsigned int us);
    bit Get18B20Ack(void);
    void DS18B20Write(unsigned char dat);
    unsigned char DS18B20Read(void);
    bit Start18B20();
    bit Get18B20Temp(int *temp);
    
    
    #endif

ds1302.c

#include "sys.h"
    
    sbit DS1302_IO = P2^3;
    sbit DS1302_CK = P1^7;
    sbit DS1302_CE = P1^3;
    
    void DS1302ByteWrite(unsigned char dat) 
    {
    	unsigned char mask;
    	DS1302_IO = 1;					//拉低IO总线
    	for(mask = 0x01; mask != 0; mask <<= 1)	//低位在前，逐位移出
    	{
    		if((dat&mask) != 0)		//首先输出该位数据
    			DS1302_IO = 1;
    		else
    			DS1302_IO = 0;
    		DS1302_CK = 1;				//拉高时钟线
    		DS1302_CK = 0;				//拉低时钟线，完成一个位的操作
    	}
    	DS1302_IO = 1;  				//写完之后确保释放IO总线
    }  
    
    unsigned char DS1302ByteRead(void)
    {
    	unsigned char mask, dat = 0;
    	
    	for(mask = 0x01; mask != 0; mask <<= 1)	//低位在前，逐位读取
    	{
    		if(DS1302_IO)			//首先读取此时的IO引脚，并设置dat中的对应位
    			dat |= mask;
    
    		DS1302_CK = 1;		//拉高时钟
    		DS1302_CK = 0;		//再拉低时钟，完成一个位的操作
    	}
    	return dat;					//返回读到的字节数据
    } 
    
    void DS1302SingleWrite(unsigned char reg, unsigned char dat)     
    {
    	DS1302_CE = 1;					//使能片选信号
    	DS1302ByteWrite((reg << 1) | 0x80);	//发送写寄存器指令
    	DS1302ByteWrite(dat);		//写入字节数据
    	DS1302_CE = 0;					//除能片选信号
    }
    
    unsigned char DS1302SingleRead(unsigned char reg)
    {
    	unsigned char dat;
    	
    	DS1302_CE = 1;					//使能片选信号
    	DS1302ByteWrite((reg << 1) | 0x81);	//发送读寄存器指令
    	dat = DS1302ByteRead();	//读取字节数据
    	DS1302_CE = 0;					//除能片选信号
    	
    	DS1302_IO = 0;					//单字节读必须加的！
    	
    	return dat;         
    }
    
    void DS1302BurstWrite(unsigned char *dat)
    {
    	unsigned char i;
    	
    	DS1302_CE = 1;
    	DS1302ByteWrite(0xBE);				//发送突发写寄存器指令
    	for(i = 0; i < 7; i ++)				//连续写入8字节数据
    		DS1302ByteWrite(*dat++);        
    	DS1302_CE = 0;      
    }
    
    void DS1302BurstRead (unsigned char *dat)
    {
    	unsigned char i;
    	
    	DS1302_CE = 1;
    	DS1302ByteWrite(0xBF);				//发送突发读寄存器指令
    	for(i = 0; i < 7; i++)				//连续读取8个字节
    		dat[i] = DS1302ByteRead();      
    	DS1302_CE = 0;  
    	
    	DS1302_IO = 0;								//突发读必须加
    }	
    
    void GetRealTime(unsigned char *time)
    {
    	unsigned char buf[8];
    	
    	DS1302BurstRead(buf);
    	time[0] = buf[6];
    	time[1] = buf[4];
    	time[2] = buf[3];
    	time[3] = buf[2];
    	time[4] = buf[1];
    	time[5] = buf[0];
    	time[6] = buf[5];
    }
    
    void SetRealTime(unsigned char *time)
    {
    	unsigned char buf[8];
    	
    	buf[7] = 0;
    	buf[6] = time[0];
    	buf[4] = time[1];
    	buf[3] = time[2];
    	buf[2] = time[3];
    	buf[1] = time[4];
    	buf[0] = time[5];
    	buf[5] = time[6];
    	DS1302BurstWrite(buf);
    }
    
    void InitDS1302(unsigned char *time)
    {
    	unsigned char dat;
    	signed char i = 7;
    	unsigned char timeinit[8];
    	
    	while(i >= 0)
    	{
    		timeinit[i] = time[i];
    		i --;
    	}
    	
    	DS1302_CE = 0;								//初始化DS1302通信引脚
    	DS1302_CK = 0;
    	dat = DS1302SingleRead(0);			//读取秒寄存器
    	DS1302SingleWrite(7, 0x00);  	//撤销写保护以允许写入数据
    	SetRealTime(&timeinit);					//设置DS1302时间
    //	DS1302SingleWrite(7, 0x80);  	//写保护以禁止写入数据
    }

ds1302.h

#ifndef __DS1302_H
    #define __DS1302_H
    
    void DS1302ByteWrite(unsigned char dat);
    unsigned char DS1302ByteRead(void);
    void DS1302SingleWrite(unsigned char reg, unsigned char dat);
    unsigned char DS1302SingleRead(unsigned char reg);
    void DS1302BurstWrite(unsigned char *dat);
    void DS1302BurstRead (unsigned char *dat);
    void GetRealTime(unsigned char *time);
    void SetRealTime(unsigned char *time);
    void InitDS1302(unsigned char *time);
    
    
    #endif

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1hpYW9tb19oYWE_size_16_color_FFFFFF_t_70]: /images/20220311/7d7e7b976fa044cab353e52ce1c97e88.png
[https_download.csdn.net_download_xiaomo_haa_11004437]: https://download.csdn.net/download/xiaomo_haa/11004437