4T第十五届蓝桥杯单片机模拟考试Ⅱ

#include "reg52.h"
#include "onewire.h"
#include "iic.h"
sfr P4   = 0xC0;
sbit C1  = P4^4;
sbit R3  = P3^2;
sbit R4  = P3^3;

float temp=0;//记录温度数据
unsigned int temp_smg=0;//数码管显示温度值
unsigned int Lux=0;//记录光照数据
unsigned int Dac_Smg=0;//记录DAC数据
float Dac=0; //记录DAC数据
unsigned char stat=1; //记录状态模式1模式2
unsigned char stat2=1; //记录界面1界面2
unsigned char led=0;//显示灯
code unsigned char Seg_Table[] = 
{
0xc0, //0
0xf9, //1
0xa4, //2
0xb0, //3
0x99, //4
0x92, //5
0x82, //6
0xf8, //7
0x80, //8
0x90, //9
0x88, //A
0x83, //b
0xc6, //C
0xa1, //d
0x86, //E
0x8e //F
};
code unsigned char Seg_Table_1[] = 
{
0x40, //0
0x79, //1
0x24, //2
0x30, //3
0x19, //4
0x12, //5
0x02, //6
0x78, //7
0x00, //8
0x10, //9
0x08, //A
0x03, //b
0x46, //C
0x21, //d
0x06, //E
0x0e //F
};


void Delay_Smg(unsigned int t)
{
	while(t--);
}

void Delay1ms()		//@12.000MHz
{
	unsigned char i, j;

	i = 12;
	j = 169;
	do
	{
		while (--j);
	} while (--i);
}

void Delay(unsigned char t)
{
	unsigned char i;
	for(i=0;i<t;i++)
	{
		Delay1ms();
	}
}

void Select_Hc573(unsigned char channel,unsigned char value)
{
	 P0=value;
	switch(channel)
	{
		case 4:
			P2 = ( P2 & 0x1f) | 0x80;
		break;
		case 5:
			P2 = ( P2 & 0x1f) | 0xa0;
		break;
		case 6:
			P2 = ( P2 & 0x1f) | 0xc0;
		break;
		case 7:
			P2 = ( P2 & 0x1f) | 0xe0;
		break;
		case 0:
			P2 = ( P2 & 0x1f) | 0x00;
		break;
	}
	P2 = ( P2 & 0x1f) | 0x00;
}

void ShowSMG_Bit(unsigned char pos,unsigned char value)
{
	Select_Hc573(6,0x01<<pos);
	Select_Hc573(7,value);
	Delay_Smg(500);
	Select_Hc573(6,0x01<<pos);
	Select_Hc573(7,0xff);
}

void ShowSMG_All(unsigned char value)
{
	Select_Hc573(6,0xff);
	Select_Hc573(7,value);
}



//1）通过获取DS18B20温度传感器的温度数据，完成温度测量功能；
void Begain_DS18B20()
{
	unsigned char i;
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0x44);
	for(i=0;i<8;i++)
	{
		Delay_Smg(60000);
	}
}
void Read_DS18B20_temp()
{
	unsigned int dat=0;
	unsigned char LSB,MSB;
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0x44);
	Delay_Smg(1000);
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0xbe);
	LSB= Read_DS18B20();
	MSB= Read_DS18B20();
	dat=MSB;
	dat=(dat<<8)|LSB;
	if((dat&0xf800)==0x0000)
	{
		temp=dat*0.0625;
	}
	temp_smg=temp*10;
}




//2）通过PCF8591 AD/DA芯片完成环境光测量和DAC输出功能；
//读取光照数据
void Read_Lux()
{
	I2CStart();
	I2CSendByte(0x90);
	I2CWaitAck();
	I2CSendByte(0x01);
	I2CWaitAck();
	I2CStop();
	
	I2CStart();
	I2CSendByte(0x91);
	I2CWaitAck();
	Lux=I2CReceiveByte();
	I2CSendAck(1);
	I2CStop();
}
//输出DAC
void Print_Dac()
{
	unsigned char dat;
	I2CStart();
	I2CSendByte(0x90);
	I2CWaitAck();
	I2CSendByte(0x40);
	I2CWaitAck();
	dat=Dac*51;
	I2CSendByte(dat);
	I2CSendAck(1);
	I2CStop();
}
//3）通过LED指示灯完成试题要求的状态指示功能；
//模式
void Stat_tran()
{
	if(stat==1)//模式1
	{
		led=~0x01;
		Select_Hc573(4,led);
		if(temp<10)
		{
			Dac=1;
		}
		else if(temp>40)
		{
			Dac=5;
		}
		else
		{
			Dac=2.0*temp/15-5.0/15;
		}
	}
	else if(stat==2)//模式2
	{
		led=~0x02;
		Select_Hc573(4,led);
		if(Lux<10)
		{
			Dac=1;
		}
		else if(Lux>240)
		{
			Dac=5;
		}
		else
		{
			Dac=4.0*Lux/230+190.0/230;
		}
	}
	Dac_Smg=Dac*10;
}




//4）通过数码管、按键完成试题要求的数据显示和界面切换功能
//温度显示界面
void ShowSMG_Temp()
{
	ShowSMG_Bit(0,Seg_Table[1]);
	ShowSMG_Bit(1,0xff);
	ShowSMG_Bit(2,0xff);
	ShowSMG_Bit(3,0xff);
	ShowSMG_Bit(4,0xff);
	ShowSMG_Bit(5,Seg_Table[temp_smg/100]);
	ShowSMG_Bit(6,Seg_Table_1[temp_smg/10%10]);
	ShowSMG_Bit(7,Seg_Table[temp_smg%10]);
}
//光照界面
void ShowSMG_Lux()
{
	ShowSMG_Bit(0,Seg_Table[2]);
	ShowSMG_Bit(1,0xff);
	ShowSMG_Bit(2,0xff);
	ShowSMG_Bit(3,0xff);
	ShowSMG_Bit(4,0xff);
	if(Lux>99)
	{
		ShowSMG_Bit(5,Seg_Table[Lux/100]);
	}
	else
	{
	ShowSMG_Bit(5,0xff);
	}
	ShowSMG_Bit(6,Seg_Table[Lux/10%10]);
	ShowSMG_Bit(7,Seg_Table[Lux%10]);
}
//输出界面
void ShowSMG_Dac()
{
	Dac_Smg=Dac*10;
	ShowSMG_Bit(0,0xc1);
	ShowSMG_Bit(1,0xff);
	ShowSMG_Bit(2,0xff);
	ShowSMG_Bit(3,0xff);
	ShowSMG_Bit(4,0xff);
	ShowSMG_Bit(5,0xff);
	ShowSMG_Bit(6,Seg_Table_1[Dac_Smg/10]);
	ShowSMG_Bit(7,Seg_Table[Dac_Smg%10]);
}
//显示
void ShowSMG()
{
	if(stat==1&&stat2==1)
	{
		ShowSMG_Temp();
	}
	else if(stat==2&&stat2==1)
	{
		ShowSMG_Lux();
	}
	else
	{
		ShowSMG_Dac();
	}
	
}
//按键
void Scan_Key()
{
	R3=0;
	R4=1;
	C1=1;
	if(C1==0);
	{
		Delay(2);
		if(C1==0)    //S5界面1与界面2的转换
		{
			stat2++;
			if(stat2==3)
			{
				stat2=1;
			}
		}
		while(C1==0)
		{
			ShowSMG();
		}
	}
	R3=1;
	R4=0;
	C1=1;
	if(C1==0);
	{
		Delay(2);
		if(C1==0)    //S4模式1与模式2的转换
		{
			stat++;
			if(stat==3)
			{
				stat=1;
			}
		}
		while(C1==0)
		{
			ShowSMG();
		}
	}
}

void Init_sys()
{
	Select_Hc573(0,0x00);
	Select_Hc573(5,0x00);
	Select_Hc573(4,0xff);
	ShowSMG_All(0xff);
	Begain_DS18B20();
}


void main()
{
	Init_sys();
	while(1)
	{
		Read_DS18B20_temp();//不断读取温度
		Read_Lux();//不断读取光照数据
		Stat_tran();//根据模式获取电压值
		Print_Dac();//输出电压
		Scan_Key();//按键
		ShowSMG();//显示界面
	}
}