LED Blinking using 8051 Microcontroller

LED is a semiconductor device used in many electronic devices, mostly used for indication purposes. It is used widely as indicator during test for checking the validity of results at different stages.

It is very cheap and easily available in variety of shape, color and size. The LEDs are also used in designing of message display boards and traffic control signal lights etc.

Consider the Proteus Software based simulation of LED blinking using 8051 Microcontroller is shown below:-

LED Blinking using 8051 Microcontroller1

In above Proteus based simulation the LEDs are interfaced to the PORT0 of the 8051 microcontroller.

Let's see the Embedded C Program for generating the LED output sequence as shown below:

00000001
00000010
00000100.....
.... And so on up to 10000000.

#include<reg51.h>
void main()
{
unsigned int k;
unsigned char l,b;
while(1)
{
P0=0x01;
b=P0;
for(l-0;l<3000;l++);
for(k=0;k<8;k++)
{
b=b<<1;
P0=b;
}
}
}

Consider the Embedded C Program for generating the LED output sequence as shown below is:-

00000001
00000011
00000111.....
.... And so on up to 11111111.

#include<reg51.h>
void main()
{
unsigned int i;
unsigned char j,b;
while(1)
{
P0=0x01;
b=P0;
for(j-0;j<3000;j++);
for(j=0;j<8;j++)
{
b=b<<1;
b=0x01;
P0=b;
}
}
}

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