PIC microcontroller ad sampling and display on LCD

/* Main.c file generated by New Project wizard

*

* Created: Tuesday April 10, 2018

* Processor: PIC18F452

* Compiler: MPLAB C18

*/

#include

#define RW PORTBbits.RB5

#define RS PORTBbits.RB6

#define EN PORTBbits.RB7

#define P0 PORTD

#define ADGO ADCON0bits.GO

void tmr(void);

void KeyInterrupt1 (void); //Interrupt service function

void KeyInterrupt2 (void); //Interrupt service function

void KeyInterrupt3 (void); //Interrupt service function

void lcd_show(void);

void lcd_show1(void);

void lcd_show2(void);

void lcd_show3(void);

void lcd_show4(void);

void lcd_show5(void);

void lcd_show6(void);

unsigned int AD_Trs(void);

unsigned int AD_Trs1(void);

unsigned int AD_Trs2(void);

//int j=0;

//int time=0;

//int timem=0;

int intermode=0;

unsigned int lednum=0;

int  max=4000,max1=3900,max2=3800,max3=3700;

int   min=1000,min1=900,min2=800,min3=1000;

unsigned char time2[7]="wangkuod";

unsigned int a1=0,a2=0,a3=0;

    int init(); //Declare initialization function

     int write_com(unsigned char); //declare write command function

      int write_date(unsigned char); //declare the write data function

      int delay(unsigned char); //declare delay function

      unsigned char x;

//sbit RS = P1^0;

  // sbit RW = P1^1;

  //sbit EN = P1^2;

//unsigned char table[]="HELLO!";

//unsigned char table1[]="2018/4/16";

void main(void) //Main function

{    

    TRISD=0;

TRISBbits.TRISB0=1;

TRISBbits.TRISB1=1;

TRISBbits.TRISB2=1;

    TRISBbits.TRISB5=0;

TRISBbits.TRISB6=0;

TRISBbits.TRISB7=0;

TRISAbits.TRISA0=1;

  TRISAbits.TRISA1=1; 

TRISAbits.TRISA2=1;

TRISAbits.TRISA6=0;

// INTCON |= 0xa0; // Enable global interrupt and Timer0 interrupt

//INTCONbits.TMR0IE=1;

INTCONbits.GIE=1;

//INT0

INTCON2bits.INTEDG0=1;

INTCONbits.INT0IF=0;

INTCONbits.INT0IE=1;

//INT1

INTCON2bits.INTEDG1=1;

INTCON3bits.INT1IF=0;

INTCON3bits.INT1IE=1;

//int2

INTCON2bits.INTEDG2=1;

INTCON3bits.INT2IF=0;

INTCON3bits.INT2IE=1;

//TMR0H = 25536/256; //high 8 bits

//TMR0L = 25536%256; //low 8 bits

//T0CON = 0x88; //Enable Timer0 and set it as a 16-bit timer without prescaler

//AD

ADCON0=0x81;

//-- ADFM ADCS2 —— —— PCFG3 PCFG2 PCFG1 PCFG0

//-- 1 0 0 0 1 1 1 0

//Right-aligned (the upper 6 bits of the ADRESH register are read as 0), AN0 is the analog input bit, reference positive and negative voltage

//VDD and VSS respectively

ADCON1 = 0x8e;

     heat();

   // write_com(0x80);    

//    for(x=0;x<6;x++)

//    {

//          write_date(table[x]);

//         delay(150);

//   }

//for(x=0;x<6;x++)

   //  {

   //       write_date(time);

//         delay(150);

//    } 

   //  write_com(0x80);    

  //   for(x=0;x<17;x++)

  //  {

//        write_date(table1[x]);

//        delay(150);

//   }

     while(1)

  {

   unsigned int a; 

   lednum = AD_Trs();

   write_com(0x80);

   time2[1]='0';

   lcd_show();

   lednum = AD_Trs1();

   write_com(0x80+0x08);

   time2[1]='1';

   lcd_show();

   lednum = AD_Trs2();

   write_com(0x80+0x40);

   time2[1]='2';

   lcd_show();

  switch(intermode) {

  case 0: {write_com(0x80+0x40+0x08);

  lcd_show1();break;

   }

case 1:

   {write_com(0x80+0x40+0x08);

   lcd_show2();break;}

  case 2: 

   {write_com(0x80+0x40+0x08);

   lcd_show3();break;

   }

  case 3: 

   {write_com(0x80+0x40+0x08);

   lcd_show4();break;

   }

  case 4: 

   {write_com(0x80+0x40+0x08);

   lcd_show5();break;

   }

  case 5: 

   {write_com(0x80+0x40+0x08);

   lcd_show6();break;

   }

default:

  {write_com(0x80);

   lcd_show1();break;

   }

  }

if(lednum>max1|lednum>max2|lednum>max3|lednum//for(a=10;a>0;a--)

//{PORTAbits.RA3=0; 

//   delay(50);

  // PORTAbits.RA3=1;

  //  delay(50);

   // PORTAbits.RA3=0;  

   // delay(50);

   // PORTAbits.RA3=1;  

  //  delay(50);} 

PORTAbits.RA6=1; }

  } 

}

#pragma code xx=0x0008 //MCC18 interrupt must be implemented with an assembly line

void inter(void) //xx is the priority. If there is no priority, xx can be omitted.

{

if(INTCONbits.INT0IF){

  _asm  

  goto KeyInterrupt1

  _endasm}

else if(INTCON3bits.INT1IF){

   _asm  

   goto KeyInterrupt2

   _endasm

  }

else {

   _asm  

   goto KeyInterrupt3

   _endasm

  }

}

//=======Interrupt service function==========

#pragma interrupt KeyInterrupt1

void KeyInterrupt1 (void)

{

if (INTCONbits.INT0IF && INTCONbits.INT0IE) //Interrupt flag bit judgment

{

//T0CONbits.TMR0ON=~T0CONbits.TMR0ON;

INTCONbits.INT0IF = 0; // Clear the interrupt flag

switch(intermode) {

  case 0: 

   {max1=max1+100; break;

   }

case 1:

   {max2=max2+100;break;}

  case 2: 

   {max3=max2+100;break;

   }

  case 3: 

   {min1=min1+100; break;

   }

  case 4: 

   {min2=min2+100;break;

   }

  case 5: 

   {min3=min3+100;break;

   }

default:

  {max1=max1+100;break;

   }

  } 

}

}

#pragma code

//=======Interrupt service function==========

#pragma interrupt KeyInterrupt2

void KeyInterrupt2 (void)

{

if (INTCON3bits.INT1IF && INTCON3bits.INT1IE) //Interrupt flag bit judgment

{

//T0CONbits.TMR0ON=~T0CONbits.TMR0ON;

//intermode=~intermode;

INTCON3bits.INT1IF = 0; // Clear the interrupt flag

intermode++;

if(intermode>5)

{intermode=0;}

}

}

#pragma code

#pragma interrupt KeyInterrupt3

void KeyInterrupt3 (void)

{

if (INTCON3bits.INT2IF && INTCON3bits.INT2IE) //Interrupt flag bit judgment

{

//time=timem=j=0;

// T0CONbits.TMR0ON=0;

INTCON3bits.INT2IF = 0; // Clear the interrupt flag

switch(intermode) {

  case 0: 

   {max1=max1-100; break;

   }

case 1:

   {max2=max2-100;break;}

  case 2: 

   {max3=max2-100;break;

   }

  case 3: 

   {min1=min1-100; break;

   }

  case 4: 

   {min2=min2-100;break;

   }

  case 5: 

   {min3=min3-100;break;

   }

default:

  {max1=max1-100;break;

   }

  } 

}

}

#pragma code

int init() // Initialization function body

{

    EN = 0;

     write_com(0X38); //Set 16*2 display, 5*7 dot matrix, 8-bit data interface

     write_com(0X0C); //Set to display, do not display cursor

     write_com(0X06); //When writing a character, the entire screen moves right

     write_com(0X01); //display clear

    return 0;

}

int write_com(unsigned char com) // write command function body

{

    RS = 0;

    RW = 0;

    P0 = com;

     delay(5);

     EN = 1;

     delay(5);

     EN = 0;

    return 0;        

}

int write_date(unsigned char date) // Function body for writing data

{

     RS = 1;

     RW = 0;

     P0 = date;

     delay(5);

     EN = 1;

     delay(5);

     EN = 0;

     return 0;        

}

int delay(unsigned char xms)

{

     unsigned char x,y;

     for(x=xms;x>0;x--)

         for(y=110;y>0;y--);

     return 0;

}

void lcd_show1(void)

{

// unsigned char a,b;

//  unsigned char time2[7];

//   unsigned int time1[2];

//   unsigned int time3[2];

  //time3[0]=j/10;

   //time3[1]=j%10;

   //time1[0]=time/10;

   //time1[1]=time%10;

  //This algorithm is used to extract the individual bits of an integer to display on the LCD

  a1 = max1/1000;

  a2 = max1%1000/100;

  a3 = max1%100/10;

  //a4 = lednum%10;

   time2[0]='A';

   time2[1]='0';

   time2[2]='M';

   time2[3]='0'+a1;

   time2[4]='.';

    time2[5]='0'+a2;

   time2[6]='0'+a3;

     for(x=0;x<7;x++)

    {

          write_date(time2[x]);

        delay(15);

    }

  }

  void lcd_show2(void)

{

// unsigned char a,b;

//   unsigned int time1[2];

//   unsigned int time3[2];

//  unsigned int a1=0,a2=0,a3=0;

  //time3[0]=j/10;

   //time3[1]=j%10;

   //time1[0]=time/10;

   //time1[1]=time%10;

  //This algorithm is used to extract the individual bits of an integer to display on the LCD

  a1 = max2/1000;

  a2 = max2%1000/100;

  a3 = max2%100/10;

  //a4 = lednum%10;

   time2[0]='A';

   time2[1]='1';

   time2[2]='M';

   time2[3]='0'+a1;

   time2[4]='.';

    time2[5]='0'+a2;

   time2[6]='0'+a3;

     for(x=0;x<7;x++)

    {

          write_date(time2[x]);

        delay(15);

    }

  }

void lcd_show3(void)

{

// unsigned char a,b;

//  unsigned char time2[7];

//   unsigned int time1[2];

//   unsigned int time3[2];

//   unsigned int a1=0,a2=0,a3=0;

  //time3[0]=j/10;

   //time3[1]=j%10;

   //time1[0]=time/10;

   //time1[1]=time%10;

  //This algorithm is used to extract the individual bits of an integer to display on the LCD

  a1 = max3/1000;

  a2 = max3%1000/100;

  a3 = max3%100/10;

  //a4 = lednum%10;

   time2[0]='A';

   time2[1]='2';

   time2[2]='M';

   time2[3]='0'+a1;

   time2[4]='.';

    time2[5]='0'+a2;

   time2[6]='0'+a3;

     for(x=0;x<7;x++)

    {

          write_date(time2[x]);

        delay(15);

    }

  }

  void lcd_show4(void)

{

// unsigned char a,b;

//   unsigned char time2[7];

//   unsigned int time1[2];

//   unsigned int time3[2];

//   unsigned int a1=0,a2=0,a3=0;

  //time3[0]=j/10;

   //time3[1]=j%10;

   //time1[0]=time/10;

   //time1[1]=time%10;

  //This algorithm is used to extract the individual bits of an integer to display on the LCD

  a1 = min1/1000;

  a2 = min1%1000/100;

  a3 = min1%100/10;

  //a4 = lednum%10;

   time2[0]='A';

   time2[1]='0';

   time2[2]='m';

   time2[3]='0'+a1;

   time2[4]='.';

    time2[5]='0'+a2;

   time2[6]='0'+a3;

     for(x=0;x<7;x++)

    {

          write_date(time2[x]);

        delay(15);

    }

  }

  void lcd_show5(void)

{

// unsigned char a,b;

//   unsigned char time2[7];

//   unsigned int time1[2];

//   unsigned int time3[2];

//   unsigned int a1=0,a2=0,a3=0;

  //time3[0]=j/10;

   //time3[1]=j%10;

   //time1[0]=time/10;

   //time1[1]=time%10;

  //This algorithm is used to extract the individual bits of an integer to display on the LCD

  a1 = min2/1000;

  a2 = min2%1000/100;

  a3 = min2%100/10;

  //a4 = lednum%10;

   time2[0]='A';

   time2[1]='1';

   time2[2]='m';

   time2[3]='0'+a1;

   time2[4]='.';

    time2[5]='0'+a2;

   time2[6]='0'+a3;

     for(x=0;x<7;x++)

    {

          write_date(time2[x]);

        delay(15);

    }

  }

  void lcd_show6(void)

{

// unsigned char a,b;

//   unsigned char time2[7];

//   unsigned int time1[2];

//   unsigned int time3[2];

//   unsigned int a1=0,a2=0,a3=0;

  //time3[0]=j/10;

   //time3[1]=j%10;

   //time1[0]=time/10;

   //time1[1]=time%10;

  //This algorithm is used to extract the individual bits of an integer to display on the LCD

  a1 = min3/1000;

  a2 = min3%1000/100;

  a3 = min3%100/10;

  //a4 = lednum%10;

   time2[0]='A';

   time2[1]='2';

   time2[2]='m';

   time2[3]='0'+a1;

   time2[4]='.';

    time2[5]='0'+a2;

   time2[6]='0'+a3;