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sahu77



Joined: 08 Sep 2011
Posts: 202

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right OR wrong
PostPosted: Mon Nov 07, 2011 1:24 pm     Reply with quote
im doing right OR wrong
Code:
/*************************************************************************
  Function Delay_sec for 1 sec
 ****************************************************************************/
void Delay_sec(void)
{
   delay_ms(1000);
}

hear OK ?
NOW I CAN USE LIKE ? ...
Code:
     if (Delay_sec>260)
           BlinkLED3();

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sahu
vortexe9000



Joined: 07 Jun 2010
Posts: 50
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hi...
PostPosted: Mon Nov 07, 2011 1:57 pm     Reply with quote
sqsdf532
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Last edited by vortexe9000 on Sun Feb 19, 2012 7:38 am; edited 1 time in total
SherpaDoug



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Posts: 1640
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PostPosted: Mon Nov 07, 2011 2:17 pm     Reply with quote
Delay_sec is a function that returns void. So your IF statement waits one second and then compares void to 260. I would expect the compiler to gag.
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sahu77



Joined: 08 Sep 2011
Posts: 202

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PostPosted: Tue Nov 08, 2011 2:38 am     Reply with quote
SherpaDoug wrote:
Delay_sec is a function that returns void. So your IF statement waits one second and then compares void to 260. I would expect the compiler to gag.
can you give 1 example ?
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sahu
ckielstra



Joined: 18 Mar 2004
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PostPosted: Tue Nov 08, 2011 5:36 am     Reply with quote
Sorry, we can not help you because we do not understand what you want to do. Please explain more.
Gabriel



Joined: 03 Aug 2009
Posts: 1067
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PostPosted: Fri Nov 11, 2011 12:20 pm     Reply with quote
Quick answer: Wrong.


Declare a global
Code:
int Seconds;


Change your function declaration to
Code:
Int Delay_sec()


Code:

Int Delay_sec()
{
   delay_ms(1000);
   Seconds++;
   Return(Seconds)
}



Code:
     
if (Delay_sec>255)
BlinkLED3();



.... as above should do what you want... but only upto 255 seconds.
.... you have to place your Delay_Sec function inside a loop though..or somthing... that calls it the amount of time you want ... you can use the Seconds variable you declared as the counter for the loop...
.... you can figure it out from here...


you are better of doing:

Code:
Void Delay_Sec(int Seconds)
{
   while(Counter<Seconds)
   {
   Delay_ms(1000);
   Counter++;
   }
}


but the above makes your code stay in the loop for upto 255 seconds... which makes your code HORRIBLE... and renders your PIC useless for a hell of a long power wasting time...which is what everybody else here has been telling you...
for such long delays... its probably better to have an external RTC with alarm... or 1hz signal and have it interrupt... and count that...
or a zillion smaller interrupts using the timers... somthing else other than calling a delay function until you get the desired delay...
its possible but bad idea.

g
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