The 10th Blue Bridge Cup single chip microcomputer

matters needing attention ：led The control of requires and operation before assignment ,0x03 Yes, read the voltage on the potentiometer ,0x43 dac The function is Write data

Switch of nixie tube , Control it with other flags on the

#include <STC15F2K60S2.H>
#include "iic.h"
#define uchar unsigned char
#define uint unsigned int
uint date,count,dat,volt;
bit jiemian,ad_mode,led_mode,smg_mode;
unsigned char code SMG_NoDot[18] ={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
     0x80,0x90,0x88,0x80,0xc6,0xc0,0x86,0x8e,
     0xff,0xce};
sbit S7=P3^0;
sbit S6=P3^1;
sbit S5=P3^2;
sbit S4=P3^3;	 
void select(uchar 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 delay(uint i)
{
	while(i--);

}
void smg_bite(uchar pos,date)
{
	select(6);
	P0=0x01<<pos;
	select(7);
	P0=date;
	
}
void smg_float(uchar pos,date)
{
	select(6);
	P0=0x01<<pos;
	select(7);
	P0=SMG_NoDot[date]&0x7f;
	
}
void inint()
{
	TMOD=0x16;
	TH0=0xff;
	TL0=0xff;
	TH1=(65535-5000)/256;
	TL1=(65535-5000)%256;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;
	EA=1;
}
void inint0() interrupt 1
{
	date++;
}
void inint1() interrupt 3
{
	TH1=(65535-50000)/256;
	TL1=(65535-50000)%256;
	count++;
	if(count==20)
	{
		dat=date;
		count=0;
		date=0;
	}
}
void smg_all()
{
	select(6);
	P0=0xff;
	select(7);
	P0=0xff;

}

void show_f()
{
	smg_bite(0,0x8e);
	delay(500);
	if(dat>9999)
	{
		smg_bite(3,SMG_NoDot[(dat/10000)%10]);
		delay(500);
	}
	if(dat>999)
	{
		smg_bite(4,SMG_NoDot[(dat/1000)%10]);
		delay(500);
	}
	if(dat>99)
	{
		smg_bite(5,SMG_NoDot[(dat/100)%10]);
		delay(500);
	}
	if(dat>9)
	{
		smg_bite(6,SMG_NoDot[(dat/10)%10]);
		delay(500);
	}
	if(dat>0)
	{
		smg_bite(7,SMG_NoDot[dat%10]);
		delay(500);
	}
	smg_all();
	
}


void show_u()
{
	smg_bite(0,0xc1);
	volt=read_rb2();
	smg_float(5,volt/100);
	delay(500);
	smg_bite(6,SMG_NoDot[(volt%100)/10]);
	delay(500);
	smg_bite(7,SMG_NoDot[volt%10]);
	delay(500);
	smg_all();
}
void key()
{
	if(S4==0)
	{
		delay(500);
		if(S4==0)
		{
			if(jiemian==0)
			{
				jiemian=1;
			}
			else if(jiemian==1)
			{
				jiemian=0;
			}
			
		
		}while(S4==0);
	}
	if(S5==0)
	{
		delay(500);
		if(S5==0)
		{
			if(ad_mode==0)
			{
				ad_mode=1;
			}
			else if(ad_mode==1)
			{
				ad_mode=0;
			}
			
		
		}while(S5==0);
	}	
if(S6==0)
	{
		delay(500);
		if(S6==0)
		{
			if(led_mode==0)
			{
				led_mode=1;
			}
			else if(led_mode==1)
			{
				led_mode=0;
			}
			
		
		}while(S6==0);
	}
	if(S7==0)
	{
		delay(500);
		if(S7==0)
		{
			if(smg_mode==0)
			{
				smg_mode=1;
			}
			else if(smg_mode==1)
			{
				smg_mode=0;
			}
			
		
		}while(S7==0);
	}
}
void led()
{
	select(4);
	if(jiemian==0&&smg_mode==1)
	{	
		P0&=0xfe;
		
	}
	if(jiemian==1&&smg_mode==1)
	{
		
		P0&=0xfd;
	}
	if(volt>=1.5&&volt<2.5)
	{
	
		P0&=0xfb;
	}
	if(volt>=3.5)
	{

		P0&=0xfb;
	}
	if(dat<5000&&dat>=1000)
	{

	P0&=0xf7;
	}
	if(dat>=10000)
	{

	P0&=0xf7;
	}
	if(ad_mode==1)
	{

	P0&=0xef;
	}


}
void keypr0()
{
	if(jiemian==0&&smg_mode==1)
	{
		show_u();
	}
	if(jiemian==1&&smg_mode==1)
	{
		show_f();
	}
	if(ad_mode==0&&jiemian==1)
	{
	 DAC(volt*51);
		
	}
	if(ad_mode==1)
	{
	 DAC(102);
	}
	if(led_mode==0)
	{
		led();
	}
	if(led_mode==1)
	{
		select(4);
		P0=0xff;
	}
	if(smg_mode==0)
	{
		select(6);
		P0=0xff;
		select(7);
		P0=0xff;
	}
	

}


void main()
{
	inint();
	while(1)
	{
		key();
		keypr0();
		
	}

}