Thread: Detection of Pulse duration

Dear All,
I want to implement one small project in my college task involves using 8051 microcontroller...using C programming
Program to count the following the pulses with respect to following conditions:-
1. If i loose pulses equal to 200ms then I have to display message “No Calculation”

2. If I loose pulses equal to 400ms then I have to display message “zero”

3. If I loose pulses 1sec then I have to display message “ Signal is Invalid”

4. In all other cases I have to return X ( Number of Pulses) + Y( Any value assumed)

I am not asking complete code..just give me some clues i will try to design the code..i am thankfull to you

My Idea is:- I will fed from external (Signal Gen) fixed duration of 2min=2000ms..i will use timer to increment each mille second(pulse duration is 1ms)…

Code:

1.	Start count the pulses store in ‘X’
2.	if(X>=2000ms) 
{
   Buff=X;
}
else
{
  measure once again till reaching 2000ms;
}
3.	Take 2000-X 
if(2000-X==200ms)
{
   printf(“No calculation”);
}
else if( 2000-X==400ms)
{
  printf(“Zero”);
}
 
else if(2000-X==1000ms)
{
   Printf(“Signal is Invalid”);
}
else
{
  return X+Y;
}