蓝桥杯单片机省赛程序题模板（本人纯手敲）

代码刚刚测试过，全部有效，有部分注释，使用的定时器1来显示LED和数码管，刚刚学习时参考xmf老师的B站视频，后来改成了参考指导书的内容。

内容纯干货好吧（第7，8,9,10,11,12,13届的程序题全部用的这个模板实现）

main.c

#include "ds1302.h"
#include "iic.h"
#include "onewire.h"

#define u8 unsigned char
#define u16 unsigned int
	
#define N 2 //测试AT24C02
	


u8 SegDuan[10] = {0xc0 , 0xf9 , 0xa4 , 0xb0 , 0x99 , 0x92 , 0x82 , 0xf8 , 0x80 , 0x90};
u8 SegDat[8] = {0xff , 0xff , 0xff , 0xff , 0xff , 0xff , 0xff , 0xff} , SegPos = 0;
u8 uLed = 0;
u8 KeyValue = 0 , KeyOldValue = 0 ,KeyDown = 0;
u16 KeyDly = 0 , SegDly = 0 , LedDly = 0;
u8 RTC_write[3] = {0x80 , 0x82 , 0x84};
u8 RTC_read[3] = {0x81 , 0x83 , 0x85};
u8 RTC_Tim[3] = {0x58 , 0x59 , 0x23};  //24H

u16 T_dat = 0;
u16 Vp_dat = 0;
//频率计数
u16 Fre_dat = 0,u_1s = 0;

u8 AT24C02_addrInput = 0,AT24C02_darInput[N] = {20,10};


void SysInit()
{
	P0 = 0xff;
	P2 = (P2 & 0x1f) | (4 << 5);
	P2 &= 0x1f;
	
	P0 = 0x00;
	P2 = (P2 & 0x1f) | (5 << 5);
	P2 &= 0x1f;
}

void Disp_Bit(u8 *dat , u8 pos)
{
	P0 = 0x01 << pos;
	P2 = (P2 & 0x1f) | (6 << 5);
	P2 &= 0x1f;
	
	P0 = dat[pos];
	P2 = (P2 & 0x1f) | (7 << 5);
	P2 &= 0x1f;
}



void RTC_Config()
{
	u8 i;
	Write_Ds1302_Byte(0x8e , 0x00);
	for(i = 0;i < 3;i++)
	{
		Write_Ds1302_Byte(RTC_write[i] , RTC_Tim[i]);
	}
	Write_Ds1302_Byte(0x8e , 0x80);
}

void RTC_ReadProc()
{
	u8 i;
	for(i = 0;i < 3;i++)
	{
		RTC_Tim[i] = Read_Ds1302_Byte(RTC_read[i]);
	}
}






void Timer1Init(void)		//1毫秒@12.000MHz
{
	AUXR |= 0x40;		//定时器时钟1T模式
	TMOD &= 0x0F;		//设置定时器模式
	TL1 = 0x20;		//设置定时初始值
	TH1 = 0xD1;		//设置定时初始值
	TF1 = 0;		//清除TF1标志
	TR1 = 1;		//定时器1开始计时
	
	ET1 = 1;
	EA = 1;
}

void Fre_Timer0()
{
	AUXR &= 0x7f;
	TMOD |= 0x04;
	TH0 = 0;
	TL0 = 0;
	TF0 = 0;
	TR0 = 1;
	ET1 = 1;
}




u8 KBT_Read()
{
	u8 keyvalue;
	u16 keynew;
	
	P44 = 0;P42 = 1;P35 = 1;P34 = 1; 
	keynew = (P3 & 0x0f);
	P44 = 1;P42 = 0;P35 = 1;P34 = 1; 
	keynew = (keynew << 4) | (P3 & 0x0f);
	P44 = 1;P42 = 1;P35 = 0;P34 = 1; 
	keynew = (keynew << 4) | (P3 & 0x0f);
	P44 = 1;P42 = 1;P35 = 1;P34 = 0; 
	keynew = (keynew << 4) | (P3 & 0x0f);
	
	switch(~keynew)
	{
		case 0x8000:keyvalue = 4;break;
		case 0x4000:keyvalue = 5;break;
		case 0x2000:keyvalue = 6;break;
		case 0x1000:keyvalue = 7;break;
//		
//		case 0x0800:keyvalue = 8;break;
//		case 0x0400:keyvalue = 9;break;
//		case 0x0200:keyvalue = 10;break;
//		case 0x0100:keyvalue = 11;break;
//		
//		case 0x0080:keyvalue = 12;break;
//		case 0x0040:keyvalue = 13;break;
//		case 0x0020:keyvalue = 14;break;
//		case 0x0010:keyvalue = 15;break;
//		
//		case 0x0008:keyvalue = 16;break;
//		case 0x0004:keyvalue = 17;break;
//		case 0x0002:keyvalue = 18;break;
//		case 0x0001:keyvalue = 19;break;
		default:keyvalue = 0;  //千万别忘记这一句
	}
	return keyvalue;
}

void KeyProc()
{
	if(KeyDly)return;
	KeyDly = 1;
	
	KeyValue = KBT_Read();
	KeyDown = KeyValue & (KeyOldValue ^ KeyValue);
	KeyOldValue = KeyValue;
	
	switch(KeyDown)
	{
		case 4:
			
		break;
		case 5:
			
		break;
		case 6:
			
		break;
		case 7:
			
		break;
	}
}



void Disp_Tim()
{
	//根据要求填写
	SegDat[0] = SegDuan[RTC_Tim[2] / 16];
	SegDat[1] = SegDuan[RTC_Tim[2] % 16];
	
	SegDat[3] = SegDuan[RTC_Tim[1] / 16];
	SegDat[4] = SegDuan[RTC_Tim[1] % 16];
	
	SegDat[6] = SegDuan[RTC_Tim[0] / 16];
	SegDat[7] = SegDuan[RTC_Tim[0] % 16];
}

void Disp_Tem()
{
	//根据要求填写
	
	SegDat[0] = 0xc6;
	SegDat[1] = 0xff;
	SegDat[2] = 0xff;
	SegDat[3] = 0xff;
	SegDat[4] = 0xff;
	SegDat[5] = SegDuan[T_dat / 100];
	SegDat[6] = SegDuan[T_dat / 10 % 10] & 0x7f;
	SegDat[7] = SegDuan[T_dat % 10];
}

void Disp_Vp()
{
	//根据要求填写
	SegDat[0] = 0xc1;
	SegDat[1] = 0xff;
	SegDat[2] = 0xff;
	SegDat[3] = 0xff;
	SegDat[4] = 0xff;
	SegDat[5] = SegDuan[Vp_dat / 100] & 0x7f;
	SegDat[6] = SegDuan[Vp_dat / 10 % 10];
	SegDat[7] = SegDuan[Vp_dat % 10];
}

void Disp_Fre()
{
	//根据要求填写
	SegDat[0] = 0x8e;
	SegDat[1] = 0xff;
	SegDat[2] = 0xff;
	SegDat[3] = SegDuan[Fre_dat / 10000];
	SegDat[4] = SegDuan[Fre_dat / 1000 % 10];
	SegDat[5] = SegDuan[Fre_dat / 100 % 10];
	SegDat[6] = SegDuan[Fre_dat / 10 % 10];
	SegDat[7] = SegDuan[Fre_dat % 10];
}

void Disp_AT24C02()
{
	SegDat[0] = SegDuan[AT24C02_darInput[0] / 100];
	SegDat[1] = SegDuan[AT24C02_darInput[0] / 10 % 10];
	SegDat[2] = SegDuan[AT24C02_darInput[0] % 10];
	SegDat[3] = 0xff;
	SegDat[4] = 0xff;
	SegDat[5] = SegDuan[AT24C02_darInput[1] / 100];
	SegDat[6] = SegDuan[AT24C02_darInput[1] / 10 % 10];
	SegDat[7] = SegDuan[AT24C02_darInput[1] % 10];
}

void SegProc()
{
	if(SegDly)return;
	SegDly = 1;
	
	RTC_ReadProc();
	T_dat = rd_temperature() * 0.0625 * 10 + 0.5;  //0.5用来四舍五入
	Vp_dat = PCF8591_ADC() * 500.0 / 255;
	AT24C02_Read(AT24C02_addrInput,N,AT24C02_darInput);
//	Disp_Tim();
//	Disp_Fre();
//	Disp_Tem();
//	Disp_Vp();
	Disp_AT24C02();
}





void LedProc()
{
	if(LedDly)return;
	LedDly = 1;
	
	
}


void main()
{
	SysInit();
	Timer1Init();
	RTC_Config();
	Fre_Timer0();
	AT24C02_Write(AT24C02_addrInput,N,AT24C02_darInput);
	while(1)
	{
		KeyProc();
		SegProc();
		LedProc();
	}
}


void Service1() interrupt 3
{
	//刷新时间
	if(++LedDly == 100)LedDly = 0;
	if(++SegDly == 500)SegDly = 0;
	if(++KeyDly == 10)KeyDly = 0;
	
	//频率计数
	if(++u_1s == 1000)
	{
		u_1s = 0;
		TR0 = 0;
		Fre_dat = (TH0 << 8) | TL0;
		TH0 = 0;
		TL0 = 0;
		TF0 = 0;
		TR0 = 1;
	}
	
	
	//数码管显示
	Disp_Bit(SegDat,SegPos);
	if(++SegPos == 8)SegPos = 0;
	
	//LED显示
	P0 = ~uLed;
	P2 = (P2 & 0x1f) | (4 << 5);
	P2 &= 0x1f;
}

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;    
}





unsigned char PCF8591_ADC()
{
	unsigned char Vp;
	IIC_Start();
	IIC_SendByte(0x90);
	IIC_WaitAck();
	IIC_SendByte(0x03);  //Rb2
	//IIC_SendByte(0x01);  //光敏电阻
	IIC_WaitAck();
	
	IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	Vp = IIC_RecByte();
	IIC_SendAck(1);
	IIC_Stop();
	
	return Vp;
}

void PCF8591_DAC(unsigned char dat)
{
	IIC_Start();
	IIC_SendByte(0x90);
	IIC_WaitAck();
	IIC_SendByte(0x40);  //Rb2
	//IIC_SendByte(0x01);  //光敏电阻
	IIC_WaitAck();
	IIC_SendByte(dat);
	IIC_WaitAck();
	IIC_Stop();
}







void AT24C02_Read(unsigned char addr,unsigned char num,unsigned char *dat)
{
	IIC_Start();
	IIC_SendByte(0xa0);
	IIC_WaitAck();
	IIC_SendByte(addr);
	IIC_WaitAck();
	
	IIC_Start();
	IIC_SendByte(0xa1);
	IIC_WaitAck();
	while(num--)
	{
		*dat++ = IIC_RecByte();
		if(num)
			IIC_SendAck(0);
		else
			IIC_SendAck(1);
		IIC_Delay(200);		
	}
	IIC_Stop();
}

void AT24C02_Write(unsigned char addr,unsigned char num,unsigned char *dat)
{
	IIC_Start();
	IIC_SendByte(0xa0);
	IIC_WaitAck();
	IIC_SendByte(addr);
	IIC_WaitAck();
	while(num--)
	{
		IIC_SendByte(*dat++);
		IIC_WaitAck();
	}
	IIC_Stop();
}

iic.h

#ifndef _IIC_H
#define _IIC_H

#include 
#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); 

unsigned char PCF8591_ADC();
void PCF8591_DAC(unsigned char dat);
void AT24C02_Write(unsigned char addr,unsigned char num,unsigned char *dat);
void AT24C02_Read(unsigned char addr,unsigned char num,unsigned char *dat);

#endif

onewire.c

#include "onewire.h"

//单总线内部延时函数
void Delay_OneWire(unsigned int 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;
}

unsigned int rd_temperature()
{
	unsigned int LSB,MSB,temp;
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0x44);
	
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0xbe);
	
	LSB = Read_DS18B20();
	MSB = Read_DS18B20();
	
	temp = (MSB << 8) | LSB;
	return temp;
}

onewire.h

#ifndef __ONEWIRE_H
#define __ONEWIRE_H

#include 

sbit DQ = P1^4;  

unsigned int rd_temperature();  

#endif

ds1302.c

#include "ds1302.h"  									

//写字节
void Write_Ds1302(unsigned  char temp) 
{
	unsigned char i;
	for (i=0;i<8;i++)     	
	{ 
		SCK = 0;
		SDA_RTC = temp&0x01;
		temp>>=1; 
		SCK=1;
	}
}   

//向DS1302寄存器写入数据
void Write_Ds1302_Byte( unsigned char address,unsigned char dat )     
{
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1; 	_nop_();  
 	Write_Ds1302(address);	
 	Write_Ds1302(dat);		
 	RST=0; 
}

//从DS1302寄存器读出数据
unsigned char Read_Ds1302_Byte ( unsigned char address )
{
 	unsigned char i,temp=0x00;
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1;	_nop_();
 	Write_Ds1302(address);
 	for (i=0;i<8;i++) 	
 	{		
		SCK=0;
		temp>>=1;	
 		if(SDA_RTC)
 		temp|=0x80;	
 		SCK=1;
	} 
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
	SCK=1;	_nop_();
	SDA_RTC=0;	_nop_();
	SDA_RTC=1;	_nop_();
	return (temp);			
}

ds1302.h

（这里要特别注意，iic.h和ds1302.h中的SDA有重定义，所以我把ds1302的SDA改成了SDA_RTC。当然，只有在需要两个头文件同时使用时才需要进行修改，一个项目里面只需要ds1302或者只需要iic时没必要进行修改）

#ifndef __DS1302_H
#define __DS1302_H

#include 
#include 

sbit SCK = P1^7;		
sbit SDA_RTC = P2^3;		
sbit RST = P1^3; 

void Write_Ds1302(unsigned char temp);
void Write_Ds1302_Byte( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302_Byte( unsigned char address );

#endif

蓝桥杯单片机省赛程序题模板（本人纯手敲）

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