Proteus simulation based on 51 MCU ADC0808

Use ADC0808 Of IN0 passageway , Input CLOCK by 500KHZ, use AT89C51 Single chip microcomputer

ADC0808 Of ADDA、ADDB、ADDC by 000 Corresponding channel IN0

ADC0808 Of ADDA、ADDB、ADDC by 001 Corresponding channel IN1

ADC0808 Of ADDA、ADDB、ADDC by 010 Corresponding channel IN2 Push in .

START and ALE You can share one I/O mouth , They are synchronized .

In this paper IN0 Channel so ADDA、ADDB、ADDC Direct ground .

Nixie tube displays some codes , Digital tube adopts common cathode display

#include <REGX52.H>
#include "Delay.h"

sbit we1=P3^0;
sbit we2=P3^1;
sbit we3=P3^2;
sbit we4=P3^3;

// Common cathode nixie tube segment code table 
unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};

// Nixie tube display sub function 
void Nixie(float num)
{
	unsigned int x,y,z,f;
	
	x=num/1000;// Take out every bit value of voltage 
	y=(unsigned int)num%1000/100;//(unsigned int) Floating point cast to integer data display 
	z=(unsigned int)num%100/10;
	f=(unsigned int)num%10;
	
	we1=0;
	P0=NixieTable[x]+0x80;	// Show decimal point and 1 v 
	Delay(1);				
	we1=1;
	P0=0x00;
	
	
	we2=0;
	P0=NixieTable[y];	// Segment code output 
	Delay(1);				// Show for a period of time 
	we2=1;
	P0=0x00;				// Segment code clear 0, Shadow elimination 
	
	we3=0;
	P0=NixieTable[z];	// Segment code output 
	Delay(1);				// Show for a period of time 
	we3=1;
	P0=0x00;				// Segment code clear 0, Shadow elimination 
	
	we4=0;
	P0=NixieTable[f];	// Segment code output 
	Delay(1);				// Show for a period of time 
	we4=1;
	P0=0x00;				// Segment code clear 0, Shadow elimination 
}

ADC0808 Convert code

#include <REGX52.H>
#include <Delay.h>

sbit ST=P2^0;
sbit EOC=P2^1;
sbit OE=P2^2;

unsigned int readDAC0808()
{
	unsigned int ADC_NUM;
	ST=1;// Empty ADC0808 Internal register value of 
	Delay(1);
	ST=0;// The falling edge begins AD transformation 
	while(EOC==0);// Judge whether the conversion is over 
	OE=1;
	ADC_NUM=P1;// receive data 
	return ADC_NUM;
}

Main function code

#include <REGX52.H>
#include <Delay.h>
#include <Nixie.h>
#include <DAC0808.h>

void main()
{
	float num;
	while(1)
	{
		num=readDAC0808()*(5.0/255)*1000;// Read DAC0808 The conversion value of , And convert binary numbers into voltage values 
		Nixie(num);// The nixie tube shows 
	}
}

As it is the first time to create, I am not proficient yet. It is only for beginners' reference