4T第十五届蓝桥杯单片机模拟考试I_十五届蓝桥杯eda模拟题

#include "reg52.h"
#include "ds1302.h"
#include "iic.h"
sfr P4    = 0xC0;
 
sbit R1=P3^0;
sbit R2=P3^1;
sbit R3=P3^2;
sbit R4=P3^3;
 
sbit C1=P4^4;
sbit C2=P4^2;
sbit C3=P3^5;
sbit C4=P3^4;
 
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
};
 
unsigned char Write[7]={0x80,0x82,0x84,0x86,0x88,0x8a,0x8c};
unsigned char Read[7]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};
unsigned char Timer[7]={0x59,0x09,0x23,0x10,0x04,0x03,0x24};
unsigned char led4=0;
void DelaySMG(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 SelectHc573(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)
{
	SelectHc573(6,0x01<<pos);
	SelectHc573(7,value);
	DelaySMG(500);
	SelectHc573(6,0x01<<pos);
	SelectHc573(7,0xff);
}
 
void ShowSMG_All(unsigned char value)
{
	SelectHc573(6,0xff);
	SelectHc573(7,value);
}
 
 
//1）通过读取DS1302 RTC芯片，获取时间数据；
//初始化
void Init_DS1302()
{
	unsigned char i;
	Write_Ds1302_Byte(0x8e,0x00);
	for(i=0;i<7;i++)
	{
		Write_Ds1302_Byte(Write[i],Timer[i]);
	}
	Write_Ds1302_Byte(0x8e,0x80);
}
//不断读取时钟数据
void Read_DS1302()
{
	unsigned char i;
	for(i=0;i<7;i++)
	{
		Timer[i]=Read_Ds1302_Byte(Read[i]);
	}
}
//时间界面
void ShowSMG_Timer()
{
	ShowSMG_Bit(0,Seg_Table[Timer[2]/16]);
	ShowSMG_Bit(1,Seg_Table[Timer[2]%16]);
	ShowSMG_Bit(2,0xbf);
	ShowSMG_Bit(3,Seg_Table[Timer[1]/16]);
	ShowSMG_Bit(4,Seg_Table[Timer[1]%16]);
	ShowSMG_Bit(5,0xbf);
	ShowSMG_Bit(6,Seg_Table[Timer[0]/16]);
	ShowSMG_Bit(7,Seg_Table[Timer[0]%16]);
}
//2）通过EEPROM实现数据记录功能；
/*输入数据起始时间（时）：E2PROM内部地址0；
输入数据起始时间（分）：E2PROM内部地址1；
输入数据（高字节）：E2PROM内部地址2；
输入数据（低字节）：E2PROM内部地址3；*/
unsigned char h=0;    //记录输入4位数据的起始时和分数据
unsigned char min=0;
void Write_Eeprom(unsigned char add,unsigned char value)
{
	I2CStart();
	I2CSendByte(0xa0);
	I2CWaitAck();
	I2CSendByte(add);
	I2CWaitAck();
	I2CSendByte(value);
	I2CSendAck(1);
	I2CStop();
}
unsigned char Read_Eeprom(unsigned char add)
{
	unsigned char dat;
	I2CStart();
	I2CSendByte(0xa0);
	I2CWaitAck();
	I2CSendByte(add);
	I2CWaitAck();
	
	I2CStart();
	I2CSendByte(0xa1);
	I2CWaitAck();
	dat=I2CReceiveByte();
	I2CSendAck(1);
	I2CStop();
	return dat;
}
//3）通过LED指示灯完成试题要求的状态指示功能；
 
//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。
unsigned char stat=1; //记录页面号
unsigned int Egg=0;   //记录加的值
 
unsigned char Egg_OK()
{
	if((Egg/1000)!=0)    //代表着四位数字记录完成
	{
		//完成之后可以向存储器中存入数据
		unsigned int Eggt=Egg;
		unsigned char LSB,MSB;
		LSB=Eggt;
		MSB=Eggt>>8;
		Write_Eeprom(0x02,MSB);
		Delay(5);
		Write_Eeprom(0x03,LSB);
		Delay(5);
		return 0;
	}
	else 
	{
		return 1;
	}
}
//输入界面
void Show_Scan()
{
	ShowSMG_Bit(0,Seg_Table[12]);
	ShowSMG_Bit(1,0xff);
	ShowSMG_Bit(2,0xff);
	ShowSMG_Bit(3,0xff);
	if(Egg>999)
	{
	ShowSMG_Bit(4,Seg_Table[Egg/1000]);
	}
	else
	{
	ShowSMG_Bit(4,0xff);
	}
	if(Egg>99)
	{
	ShowSMG_Bit(5,Seg_Table[Egg/100%10]);
	}
	else
	{
	ShowSMG_Bit(5,0xff);
	}
	if(Egg>9)
	{
	ShowSMG_Bit(6,Seg_Table[Egg/10%10]);
	}
	else
	{
	ShowSMG_Bit(6,0xff);
	}
	if(Egg>0)
	{
	ShowSMG_Bit(7,Seg_Table[Egg%10]);
	}
	else
	{
	ShowSMG_Bit(7,0xff);
	}
}
//记录界面
void Show_Note()
{
	ShowSMG_Bit(0,Seg_Table[14]);
	ShowSMG_Bit(1,0xff);
	ShowSMG_Bit(2,0xff);
	ShowSMG_Bit(3,Seg_Table[h/16]);
	ShowSMG_Bit(4,Seg_Table[h%16]);
	ShowSMG_Bit(5,0xbf);
	ShowSMG_Bit(6,Seg_Table[min/16]);
	ShowSMG_Bit(7,Seg_Table[min%16]);
}
//总页面
unsigned char led=0x00;
unsigned char Led_OK()
{
	unsigned int Egg_f=0;
	unsigned char LSB,MSB;
	MSB=Read_Eeprom(0x02);
	Delay(5);
	LSB=Read_Eeprom(0x03);
	Egg_f=MSB;
	Egg_f=(Egg_f<<8)|LSB;
	if(Egg_f<Egg)
	{
		return 1;
	}
	else 
	{
		return 0;
	}
	
}
void ShowSMG()
{
	if(stat==1)
	{
		ShowSMG_Timer();
		if(led4==0)
		{
		led=~0x01;
		SelectHc573(4,led);
		}
		else
		{
		led=~0x09;
		SelectHc573(4,led);
		}
	}
	else if(stat==2)
	{
		Show_Scan();
		if(led4==0)
		{
		led=~0x02;
		SelectHc573(4,led);
		}
		else
		{
		led=~0x0a;
		SelectHc573(4,led);
		}
	}
	else if(stat==3)
	{
		Show_Note();
		if(led4==0)
		{
		led=~0x04;
		SelectHc573(4,led);
		}
		else
		{
		led=~0x0c;
		SelectHc573(4,led);
		}
	}
}
//按键
void Scan_key()
{
 
	C1=C2=C3=C4=1;
	R1=R3=R4=1;
	R2=0;
	if(C1==0)              //S6
	{
		Delay(2);
		if(C1==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+0;
			}
		}
		while(C1==0)
		{
			ShowSMG();
		}
	}
	if(C2==0)              //S10
	{
		Delay(2);
		if(C2==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+1;
			}
		}
		while(C2==0)
		{
			ShowSMG();
		}
	}
	if(C3==0)              //S14
	{
		Delay(2);
		if(C3==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+2;
			}
		}
		while(C3==0)
		{
			ShowSMG();
		}
	}
	if(C4==0)              //S18
	{
		Delay(2);
		if(C4==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+3;
			}
		}
		while(C4==0)
		{
			ShowSMG();
		}
	}
	C1=C2=C3=C4=1;
	R2=R1=R4=1;
	R3=0;
	if(C1==0)              //S5
	{
		Delay(2);
		if(C1==0)
		{
			Egg=0;
		}
		while(C1==0)
		{
			ShowSMG();
		}
	}
	if(C2==0)              //S9
	{
		Delay(2);
		if(C2==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+4;
			}
		}
		while(C2==0)
		{
			ShowSMG();
		}
	}
	if(C3==0)              //S13
	{
		Delay(2);
		if(C3==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+5;
			}
		}
		while(C3==0)
		{
			ShowSMG();
		}
	}
	if(C4==0)              //S17
	{
		Delay(2);
		if(C4==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+6;
			}
		}
		while(C4==0)
		{
			ShowSMG();
		}
	}
	C1=C2=C3=C4=1;
	R2=R3=R1=1;
	R4=0;
	if(C1==0)              //S4
	{
		Delay(2);
		if(C1==0)
		{
			stat++;
			if(stat==2)    //开始记录数据
			{
				h=Timer[2];
				min=Timer[1];
				Write_Eeprom(0xa0,h);
				Write_Eeprom(0xa2,min);
				Egg=0;//同时Egg开始记录获取的数据
			}
			if(stat==3)
			{
				led4=Led_OK();
			}
			if(stat==4)
			{
				stat=1;
			}
		}
		while(C1==0)
		{
			ShowSMG();
		}
	}
	if(C2==0)              //S8
	{
		Delay(2);
		if(C2==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+7;
			}
		}
		while(C2==0)
		{
			ShowSMG();
		}
	}
	if(C3==0)              //S12
	{
		Delay(2);
		if(C3==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+8;
			}
		}
		while(C3==0)
		{
			ShowSMG();
		}
	}
	if(C4==0)              //S16
	{
		Delay(2);
		if(C4==0)
		{
			if(stat==2&&Egg_OK())
			{
			Egg=Egg*10+9;
			}
		}
		while(C4==0)
		{
			ShowSMG();
		}
	}
}
 
 
 
void Init_Sys()
{
	SelectHc573(0,0x00);
	SelectHc573(5,0x00);
	SelectHc573(4,0xff);
	ShowSMG_All(0xff);
	Init_DS1302();    //时钟初始化
}
 
void main()
{
	Init_Sys();
	while(1)
	{
		Read_DS1302(); //不断读取时钟
     Scan_key();   //扫描按键
		 ShowSMG();
	}
	
}