8051 MCU CODES: August 2015

Wednesday, 26 August 2015

LCD code to display the characters (8051)

#include<reg51.h>

#define Lcd P2 // for 8-data pins D0-D7
#define lcd1 P3 //for RS, RW, EN Pins

void delay(unsigned int x) //delay function
{
while(x--);
}

void cmd(unsigned int x) // command function
{
P2=x;
delay(1000);
P3=0x04; // RS=0,R/W=0,E=1
delay(100);
P3=0x00; // RS=0,R/W=0,E=0
}
void intiz() // initialization function
{

cmd(0x01); // to clear screen
cmd(0x0c); // display ON cursor OFF
cmd(0x80); // first row first column
cmd(0x38); //2-lines and 5x7 matrix
}
void dat(unsigned int x) // data function
{
P2=x;
delay(100);
P3=0x05; // RS=1,R/W=0,E=1
delay(100);
P3=0x01; // RS=1,R/W=0,E=0

}
void main()
{
int j,x,a[]={'A','L','I',' ','S','A','D','I','Q'}; // characters to be displayed

intiz(); // LCD initialization

while(1)
{
x=0x8f; // first row last column
cmd(x--);
//cmd(0x1c);

for(j=0;j<3;j++) //loop to display the characters
{
dat(a[j]);
cmd(0x1c);
}

x=0xcf; // last row last column
cmd(x--);

for(j=3;j<9;j++) //loop to display the characters
{
dat(a[j]);
cmd(0x1c);
}
}

}

//Please comment below for any queries

Compact code for Numerical values display on LCD (8051)

#include<reg51.h> //header file

#define lcd P2 // 8-pin data lines D0-D7
#define lcd1 P3 // 3- Command lines RS, RW, EN

void delay(unsigned int x) // Delay Function
{
while(x--);
}

void cmd(unsigned int x) // Command Function
{
P2=x;
delay(1000);
P3=0x04;    // RS=0,R/W=0,E=1
delay(100);
P3=0x00;   // RS=0,R/W=0,E=0

}

void initz() //Initialization function
{
cmd(0x01);
cmd(0x80);
cmd(0x0e);
cmd(0x38);
}

void dat(unsigned int x) //data function
{
P2=x;
delay(10000);
P3=0x5; // RS=1,R/W=0,E=1
delay(100);
P3=0x1;     // RS=1,R/W=0,E=0
}
void count(unsigned int x) // function to calculate the numerical values 000-999
{
unsigned int a,b=1;
a=x;
while(a>9) // loop counts the no. of digits in the number received in x
{
b=b*10;
a=a/10;
}
while(b>0) // loop sends the digits to dat function
{
dat((x/b)+48);
x=x%10;
b=b/10;
}
}
void main()
{
unsigned int i;
initz(); //LCD initialization
while(1)
{
for(i=0;i<1000;i++) // loop to send the number to Count function
{
count(i);
cmd(0x80); // display the no. in first row
}
}
}

//Please comment below for any queries

LCD Numerical value Display 000-999 (8051)

#include<reg51.h>

#define lcd P2 //Data Pins D0-D7
#define lcd1 P3 //RS,RW,EN pins

void delay(unsigned int x) //delay function
{
while(x--);
}
void cmd(unsigned int x) //LCD command function called from initz function
{
P2=x;
delay(1000);
P3=0x04;    // RS=0,R/W=0,E=1
delay(100);
P3=0x00;    // RS=0,R/W=0,E=0

}
void initz() // LCD Initiatization
{
cmd(0x01); // command for clear the screen
cmd(0x80); // command for first row first column
cmd(0x0e); // display ON cursor blink
cmd(0x38); // 2-lines and 5x7 matrix
}
void dat(unsigned int x) //LCD Data Function
{
P2=x;
delay(10000);
P3=0x5;    // RS=1,R/W=0,E=1
delay(100);
P3=0x1;   // RS=1,R/W=0,E=0
}

void main()
{
unsigned int i,j,k;
initz(); // LCD Initialization
while(1)
{
for(i=48;i<57;i++)
{
cmd(0x80);
dat(i);
delay(100000);delay(10000);

for(j=48;j<58;j++)
{
cmd(0x81);
dat(j);
delay(10000);delay(10000);

for(k=48;k<58;k++)
{
cmd(0x82);
dat(k);
delay(10000);delay(10000);
}
cmd(0x82); //command for first row third place
dat(48); // 48 is hex value stands for 0
}
cmd(0x81); //command for first row second place
dat(48);
}
}
}

LCD Display

#include<reg51.h> // header file

#define Lcd P2 // Connection to 8 data pins D0-D7
#define lcd1 P3 // Connection of RS, RW, EN Pins

void delay(unsigned int x) //delay function
{
while(x--);
}

void cmd(unsigned int x) // command function
{
P2=x;
delay(10000);
P3=0x04;    // RS=0,R/W=0,E=1
delay(100);
P3=0x00;   // RS=0,R/W=0,E=0
}

void intiz() //LCD initialization function
{
cmd(0x01); // command for clear the screen
cmd(0x80); // command for first row first column
cmd(0x0e); // display ON cursor blink
cmd(0x38); // 2-lines and 5x7 matrix
}

void dat(unsigned int x) // Data/Command function
{
P2=x;
P3=0x05;   // RS=1,R/W=0,E=1
delay(100);
P3=0x01;     // RS=1,R/W=0,E=0
}
void main()
{
intiz(); // LCD initialization
dat('A'); // data
dat('l');
dat('i');
}

//Please comment below for any queries

Seven-segment display using switch

#include<reg51.h>
#define led P2 // 7-segment connection
sbit sw=P3^0; // Switch connection
unsigned int x,a[]={0x06,0x5B,0x4F,0x66,0x6D,0x7C,0x07,0x7F,0x67,0x3F},j=0; // Values from 0-9
void delay(unsigned int x)
{
while(x--);

}
void main()
{
while(1)
{

if(sw==0)
{
P2=a[j];
delay(100000);
j++;
}
if(j==10)
j=j-10;

}
}

//Please comment below for any queries

2-Seven-segment to display number from 00-99 (8051)

#include<reg51.h>
#define led P2
#define led1 P3
unsigned int x,a[]={ 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7C,0x07,0x7F,0x67},i,j;
void delay(unsigned int x)
{
while(x--);
}
void seg_disp(char x)
{
P2=0x00;
P3=0x02;
P2=a[x/10];
delay(1000);
P2=0x00;
P3=0x01;
P2=a[x%10];
delay(1000);
}
void main()
{
while(1)
{
for(i=0;i<100;i++)
{
for(j=0;j<50;j++)
{
seg_disp(i);
}
}
}
}

seven-segment using for loop(8051)

#include<reg51.h>
#define led P2
void delay(unsigned int x)
{
while(x--);

}
void main()
{
unsigned int x,a[]={0x06,0x5B,0x4F,0x66,0x6D,0x7C,0x07,0x7F,0x67,0x3F},i;

while(1)
{
for(i=0;i<10;i++)
{
led=a[i];
delay(30000);
}
}
}

seven-segement(8051) 0-9 display

#include<reg51.h>
#define led P2
void delay(unsigned int x)
{
while(x--);

}
void main()
{
unsigned int x;

while(1)
{

led=0x06;
delay(100000);
led=0x5B;
delay(100000);
led=0x4F;
delay(100000);
led=0x66;
delay(100000);
led=0x6D;
delay(100000);
led=0x7C;
delay(100000);
led=0x07;
delay(100000);
led=0x7F;
delay(100000);
led=0x67;
delay(100000);
led=0x3F;
delay(100000);
}
}

Tuesday, 18 August 2015

LED Nibble ( 4 pin ON - 4 pin OFF)

#include<reg51.h>
#define led P2
void delay(unsigned int x)
{
while(x--);

}
void main()
{
unsigned int x,i;

while(1)
{
P2=0x0f; // 4 bit(Nible) LSB operation
delay(3000);
P2=0xf0; // 4 bit(Nible) MSB operation
delay(3000);
}
}

LED Blinking (Even)

#include<reg51.h>
#define led P2
void delay(unsigned int x)
{
while(x--);

}
void main()
{
while(1)
{

led=0x02;
delay(100000);
led=0x08;
delay(100000);
led=0x20;
delay(100000);
led=0x80;
delay(100000);
led=0x01;
delay(100000);
led=0x04;
delay(100000);
led=0x10;
delay(100000);
led=0x40;
}
}

LED Blinking (Alternate)

#include<reg51.h>
#define led P2
void delay(unsigned int x)
{
while(x--);

}
void main()
{
unsigned int i,l;// range for unsigned is 0-65535

while(1)
{

//simple bitwise led ON-OFF
/*for(i=1;i<129;i=i*2) //bitwise led ON-OFF using FOR LOOP
{
delay(1000); delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);
P2=i;
}*/
l=0x01; //bitwise LED ON-OFF using Shit operator
for(i=1;i<=8;i++)
{
led=l;
l=l<<1;
delay(3000); delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);delay(3000);
}
}
}

Program For LED (8051 uc)

#include<reg51.h>
#define Led P2
void delay(unsigned int x)
{
while(x--);

}
void main()
{
unsigned int i=0x00;
while(1)
{
i=~i;
P2=i;
delay(1000);
}
}

//Please comment below for any queries