Proteus Projects DISCUSSION

Led not blinking using 8051!

Started by syedzainnasir 25 Feb 2017Led not blinking using 8051!

1 replies 248 views 2 participants

Latest activity · 25 Feb 2017

Led not blinking using 8051!

syedzainnasir 25 Feb 2017 Proteus Projects Forum

Hey guys!

I setup a breadboard circuit to do the basic single led blinking test using a AT89C52 chip. However, I do not get any blinking, it just lights up until power is stopped. I had only enabled a single bit for port0.0. The code is below. However, the led lights up even if I connect it to any other port. Is it a problem with my code? Please check it. Thank You.

[code]#include<reg52.h>
sbit led = P0^0;
 
void delay(int time)        //This function produces a delay in msec.
{
    int i,j;
    for(i=0;i<time;i++)
     for(j=0;j<1275;j++);
}
 
void main()
{
     while(1)
     {
          led=0;
          delay(500);
          led=1;
          delay(500);
     }
}
 [/code]

Community replies 1

Re: Led not blinking using 8051!

25 Feb 2017 #2

~~[quote=Josephine post_id=181 time=1488021923 user_id=81]~~ Hey guys!

I setup a breadboard circuit to do the basic single led blinking test using a AT89C52 chip. However, I do not get any blinking, it just lights up until power is stopped. I had only enabled a single bit for port0.0. The code is below. However, the led lights up even if I connect it to any other port. Is it a problem with my code? Please check it. Thank You.

[code]#include<reg52.h>
sbit led = P0^0;
 
void delay(int time)        //This function produces a delay in msec.
{
    int i,j;
    for(i=0;i<time;i++)
     for(j=0;j<1275;j++);
}
 
void main()
{
     while(1)
     {
          led=0;
          delay(500);
          led=1;
          delay(500);
     }
}
 [/code]

[/quote] 50ms is too short. Try 500ms.
please check: ~~[url=http://www.theengineeringprojects.com/2015/12/led-blinking-project-using-8051-microcontroller-proteus.html]~~LED Blinking Project Using 8051 Microcontroller[/url]