required delay before function execution!!

Hello,

Please refer the function mentioned below.

Code:

---

void ringAlarm(int8* ai)
{ 
  int i,j;
    static int16 time_delay=10000;
    time_delay=time_delay-1;

 for(i=0;i<8;i++)
 {   
    if(ai[i]==1 && time_delay==0)
    { 
         
          switch(i)
          {
            case 0:
              output_high(pin_A0);
              break;
            case 1:
              output_high(pin_A1);
              break;
            case 2:
              output_high(pin_A2);
              break;
            case 3:
              output_high(pin_A3);
              break;
            case 4:
              output_high(pin_A4);
              break;
            case 5:
              output_high(pin_A5);
              break;
            case 6:
              output_high(pin_E0);
              break;
            case 7:
              output_high(pin_E1);
              break;
          }//switch ends
     
    }// if ends
}//for ends
 
}

---

a[i] gives alarm conditions.

My requirement is
1. Check a[i]==1 i.e checking condition
2. Wait for some delay
3. Again check for a[i]
4. And if a[i]==1 after delay then only execute the function

But i can not use delay function which halts execution of next code.

With the above mentioned code i am not getting expected result.

Please suggest what i need to do?

thanks,
paddy

Required delay before function execution!!! - Dev Shed
How To Ask Questions The Smart Way

Perhaps you could start by telling both boards which OS and compiler you're using.

Also, what sort of delay are you looking for?
- A few microseconds
- A few seconds
- less, more?

To delay program execution, use the sleep or usleep functions. Sometimes the behaviour of this function depends on the operation system and/or compiler.

Quote:

---

Originally Posted by Salem

Perhaps you could start by telling both boards which OS and compiler you're using.

Also, what sort of delay are you looking for?
- A few microseconds
- A few seconds
- less, more?

---

I am really sorry for the incomplete information.

I am using windows os and CCS compiler and I am looking for the delay of 1 minute.

I know that when programming a PIC with the CCS compiler, you have a function named delay_ms()

See if it's in your help manual

Quote:

---

Originally Posted by Click_here

I know that when programming a PIC with the CCS compiler, you have a function named delay_ms()

See if it's in your help manual

---

yeah. I have tried with that.

But it halts the next program execution as i need delay of around 1 to 2 minutes.

so that is why i am trying something with static value as mentioned in code, but it is not working.

Are you making a program for a PIC microprocessor? If so, what one?

[edit]
On a second look at your code, yes you are :)

Which PIC are you using?

[/edit]

Yes i am programming for PIC18F4520.

In normal case that function executes when alarm condition occurs.

But to avoid false triggering i need some delay, say 1 or 2 minutes and after that delay if alarm condition is present then only that function should execute.

The reason I ask is because you can set up a timer interrupt which counts milliseconds and then seconds with this

Code:

---

setup_timer_2(T2_DIV_BY_1,200,10);

---

Actually i have used that port pins as an I/O.

So i can not use interrupts.

OK, the 18F4520 has a timer 2 interrupt

Code:

---

#int_TIMER2
TIMER2_isr()
{
  ... interrupt code
}

in your main...
setup_timer_2(T2_DIV_BY_1,200,10);
enable_interrupts(INT_TIMER2);
enable_interrupts(GLOBAL);

---

You can work out what setting you want for you timer here - PIC Timer Calculator

Also, CCS has a great forum here - CCS :: Index

yeah. I will check out with this.

Thanks a lot for your support.

Good luck with your project, Paddy :)