Experience summary of the 12th Blue Bridge Cup (written for the first time)

DS18B20 The read , It can be written directly on the bus c In the program . How to deal with reading decimals , Delay rewriting of the underlying file of the single bus *4 , Last delay by 70-100

Use of matrix keyboard ： Press the key to assign variables , It is also necessary to carry out anti shake treatment （ The same goes for independent keys ） Matrix keyboard assignment Assign values from high to low

iic Bus ：dac Collection （0x43）, Photosensitive resistor （0X01）, Potentiometer （0x03）,24c02 Of （0xa0,0xa1） Writing All of them can be put directly on iic in

dac collection Put the data directly ,0-255 The corresponding is 0-5; Show the voltage by yourself dac The output voltage is given by oneself *51

The digital tube displays decimals , In addition, create a display function ,P0 The broken code of &0x7f

Interface display function ： utilize switch Statement to implement , Create variables to implement , Use the addition and subtraction of variables to realize ,

#include <STC15F2K60S2.H>
#include "onewire.h"
#include "iic.h"
#define uint unsigned int
#define uchar unsigned char
sbit L1=P3^0;
sbit L2=P3^1;
sbit L3=P3^2;
sbit L4=P3^3;
sbit C1=P3^4;
sbit C2=P3^5;
sbit C3=P4^2;
sbit C4=P4^4;
unsigned char code SMG_NoDot[18] ={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
     0x80,0x90,0x88,0x80,0xc6,0xc0,0x86,0x8e
     ,0xb6,0x86};

uint date1; // temperature 
uint dat2;
uchar state,num1;
uchar a=25;	
bit mode=0;	 
void xz(unsigned char n)
{
	switch(n)
	{
		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;
	
	}

}

void smg_bite(unsigned char pos,date)
{
	xz(6);
	P0=0x01<<pos;
	xz(7);
	P0= SMG_NoDot[date];
}
void smg_all()
{
	xz(6);
	P0=0x00;
	xz(7);
	P0=0xff;
}
void smgfloat(unsigned char pos,date)
{
	xz(6);
	P0=0x01<<pos;
	xz(7);
	P0= SMG_NoDot[date]&0x7f;
}
void delay(uint i)
{
	while(i--);
}

void key()
{
	L4=0;
	L2=L3=L1=1;
	C1=C2=C3=C4=1;
	if(C4==0)
	{
		num1=4;
	}while(C4==0);
	if(C3==0)
	{
		num1=8;
	}while(C3==0);
	if(C2==0)
	{
		num1=12;
	}while(C2==0);
	if(C1==0)
	{
		num1=16;
	}while(C1==0);
	
	L3=0;
	L2=L4=L1=1;
	C1=C2=C3=C4=1;
	if(C4==0)
	{
		num1=5;
	}while(C4==0);
	if(C3==0)
	{
		num1=9;
	}while(C3==0);
	if(C2==0)
	{
		num1=13;
	}while(C2==0);
	if(C1==0)
	{
		num1=17;
	}while(C1==0);
	
	L2=0;
	L3=L4=L1=1;
	C1=C2=C3=C4=1;
	if(C4==0)
	{
		num1=6;
	}while(C4==0);
	if(C3==0)
	{
		num1=10;
	}while(C3==0);
	if(C2==0)
	{
		num1=14;
	}while(C2==0);
	if(C1==0)
	{
		num1=18;
	}while(C1==0);
	L1=0;
	L2=L4=L3=1;
	C1=C2=C3=C4=1;
	if(C4==0)
	{
		num1=7;
	}while(C4==0);
	if(C3==0)
	{
		num1=11;
	}while(C3==0);
	if(C2==0)
	{
		num1=15;
	}while(C2==0);
	if(C1==0)
	{
		num1=19;
	}while(C1==0);
}





void xswd()
{
	date1= wendu();
	smg_bite(0,19);
	delay(500);
	smg_bite(4,date1/1000);
	delay(500);
	smgfloat(5,date1%1000/100);
	delay(500);
	smg_bite(6,(date1%100)/10);
	delay(500);
	smg_bite(7, date1%10);
	delay(500);
	smg_all();
}

void xsdac()
{
	uchar t;
	
	date1=wendu();
	if(mode==1)
	{
		if(date1<a*100)
		{
			DAC(0);
			smgfloat(5,0);
			delay(500);
			smg_bite(6,0);
			delay(500);
			smg_bite(7,0);
			delay(500);
			smg_all();
		
		}
		else if(date1>a*100)
		{
			DAC(255);
			smgfloat(5,5);
			delay(500);
			smg_bite(6,0);
			delay(500);
			smg_bite(7,0);
			delay(500);
			smg_all();
		
		}
	
	}
	else if(mode==0)
	{
		if(date1<=2000)
		{
			
			DAC(51);
			smgfloat(5,1);
			delay(500);
			smg_bite(6,0);
			delay(500);
			smg_bite(7,0);
			delay(500);
			smg_all();
		}
		else if(date1>=4000)
		{
			
			DAC(204);
			smgfloat(5,4);
			delay(500);
			smg_bite(6,0);
			delay(500);
			smg_bite(7,0);
			delay(500);
			smg_all();
		}
		else if(date1>2000 && date1<4000)
		{
			t=0.0015*date1-2;
			DAC(t*51);
			smgfloat(5,t/100);
			delay(500);
			smg_bite(6,(t%100)/10);
			delay(500);
			smg_bite(7,t%10);
			delay(500);
			smg_all();
		}
	
	}
	

}

void cssz()
{
	smg_bite(0,18);
	delay(500);
	smg_bite(6,a/10);
	delay(500);
	smg_bite(7,a%10);
	delay(500);
	smg_all();
}

void keypro()
{
	if(num1==4)
	{
		state++;
		if(state==3)
		{
			state=0;
		}
	}
	if(num1==8&& state==1)
	{
		a--;
	}
	if(num1==9&& state==1)
	{
		a++;
	}
	if(num1==5)
	{
		mode=~mode;
	}
	num1=0;
}

void xsgn()
{
	switch(state)
	{
		case 0:xswd();break;
		case 1:cssz();break;
		case 2:xsdac();break;
	}

}
void led()
{
	xz(4);
	if(state==0&&mode==1)
	{
		
		P0=0xfe;
	
	}
	if(state==0)
	{
		
		P0=0xfd;
	}
	if(state==1)
	{
		P0=0xfb;
	}
	if(state==2)
	{
		P0=0xf7;
	}

}

void main()
{
	while(1)
	{
	key();
	keypro();
	xsgn();
	led();
	}

}