51 MCU ADC0832 voltage measurement LCD 1602 display C program and proteus simulation

Today, through searching, I have compiled a C program and circuit connection diagram that can be simulated by proteus 7 based on 51 microcontroller + ADC0832 voltage acquisition and LCD 1602 voltage display. I hope it will be helpful to everyone.

It doesn't matter who wrote or modified the program. The main thing is to learn and use the microcontroller AD conversion. This is the best way.

The circuit connection diagram is as follows:

The C program is as follows:

#include
#include
#include

/**********************************8/
/**********LCD1602 interface program**********/

#define DD P2
sbit Rs=P3^0;
sbit Rw=P3^1;
sbit E=P3^2;
sbit busy_p=ACC^7;
/********************************/
void delay_1ms(unsigned char i)   //最小延时1ms
{ unsigned char j;
while(i--)
for(j=0;j<125; j++);
}
void delay_10ns(unsigned char i) //最小延时10ns
{ unsigned char j;
while(i--)
for(j=0;j<10; j++);
}

void write_com(unsigned char com,bit p)   //写指令
{if(p)

delay_10ns(5);
E=0;
Rs=0;
Rw=0; 
DD=com;
delay_10ns(50); //>40ns
E=1; 
delay_1ms(2); //>150ns
E=0;
delay_10ns(4); //>25+10ns 
}
void write_date(unsigned char DATA)   //写数据
{

delay_10ns(50);
E=0;
Rs=1;
Rw=0; 
DD=DATA; 
delay_10ns(50);
E=1;

delay_10ns(50);
E=0;
delay_10ns(4);
}
void addr_x_y(unsigned char x,bit y) //write coordinates, set position

{ unsigned char temp=0x80;
if(y)
   {temp|=0x40;}
   temp|=x;
write_com(temp,0);
}
void desplay_char(unsigned char x,bit y,unsigned char p)

//在指定位置显示一个字符。
{ addr_x_y(x,y);
write_date(p);
}
void init(void)
{delay_1ms(15);
write_com(0x38,0); 
delay_1ms(5);
write_com(0x38,0); 
delay_1ms(5); 
write_com(0x38,0); 
delay_1ms(5);
write_com(0x38,1); 
write_com(0x08,1); 
write_com(0x01,1); 
write_com(0x06,1); 
write_com(0x0c,1); 
}
void xs_int(unsigned int shuju,bit t)   //显示一个数字
{unsigned char huancun[6]={0};
unsigned char biaozhi=0,i;
if   (shuju < 10) biaozhi = 1;
else if(shuju < 100) biaozhi = 2;
else if(shuju < 1000) biaozhi = 3;
else if(shuju < 10000) biaozhi = 4;
else if(shuju < 65535) biaozhi = 5;
switch(biaozhi)
   {case 5:huancun[5] = shuju/10000; 
    case 4:huancun[3] = shuju%10000/1000;
    case 3:huancun[2] = shuju%1000/100;
    case 2:huancun[1] = shuju%100/10;
    case 1:huancun[0] = shuju%10; 
break;
    default:break;
}
for(i=6;i>1;i--)
   {if(i==5)desplay_char(10,1,'.');
        else desplay_char(15-i,t,0x30+huancun[i-1]); } 
desplay_char(15,t,'V'); 
}

/****************************************************************/
/**********ADC0832 interface program****************************************/

sbit ADC_CS =P3^4;

sbit ADC_CLK=P3^5;

sbit ADC_DO =P3^6;

sbit ADC_DI =P3^7;

/*******************************************************************/

void Delay(unsigned char j)

{

unsigned char i;

for(i=0;i

}

unsigned char ADC0832(void) //Convert the analog voltage value into an 8-bit binary number and return it

{

unsigned char i,data_c;

data_c=0;

ADC_CS=0;

ADC_DO=0; //Chip select, DO is high impedance

for(i=0;i<10;i++)

    {;}

ADC_CLK=0;

Delay(2);

ADC_DI=1;

ADC_CLK=1;

Delay(2); //First pulse, start bit

ADC_CLK=0;

Delay(2);

ADC_DI=1;

ADC_CLK=1;

Delay(2); //The second pulse, DI=1 indicates dual-channel unipolar input

ADC_CLK=0;

Delay(2);

ADC_DI=1;

ADC_CLK=1;

Delay(2); //The third pulse, DI=1 means selecting channel 1 (CH2)

ADC_DI=0;

ADC_DO=1; //DI turns to high impedance state, DO leaves high impedance state to prepare for output data

ADC_CLK=1;

Delay(2);

ADC_CLK=0;

Delay(2); //According to the experiment, adding a pulse AD here can correctly read the data.

           //If not added, the read data will be one bit less (the lowest bit d0 cannot be read)

for (i=0; i<8; i++)

    {

     ADC_CLK=1;

        Delay(2);

ADC_CLK=0;

Delay(2);

     da ta_c=(da ta_c<<1)|ADC_DO; //DO outputs one bit of data at the falling edge of each pulse, and finally ch is an 8-bit binary number

   }

   ADC_CS=1; //Cancel chip select, a conversion cycle ends

return(da ta_c); //Return the conversion result
}

void main(void)
{ 
unsigned int data_temp=0; 
while(1)
{ data_temp=ADC0832();
   init();
xs_int(196*data_temp,1);
   }

}

The above has passed the simulation test.