Chief Delphi - Beginning programmer: Variable question HELP!!!

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Variable question (solved)

OK i'm going to be sitting by my computer refreshing every 30 seconds checking for reply :ahh:

In file user_routines.c, under

/***DEFINE USER VARIBLES AND INITIALIZE THEM HERE ***/
I added:
static unsigned int bob = 2;

------------------------------------------------------------
------------------------------------------------------------
Now under the:
Void Default_Routine(void)
{
if(bob == 2 && p1_sw_trig){bob = 0;}
if(bob == 0 && p1_sw_trig){bob = 1;}
if(bob == 1 && p1_sw_trig){bob = 0;}

}

------------------------------------------------------------
------------------------------------------------------------
Before I click on the trigger, I get the value 2 for bob...
Click on it once, I get 0
click on it again I get 0(it's suppose to change to 1)

WHAT AM I DOING WRONG!?!!?
Please help!

Re: Beginning programmer: Variable question HELP!!!

Your problem is that you set bob to 1 and then check to see if it is 1 and the button is pressed and set it back to 0.

Code:

if(bob == 2 && p1_sw_trig)

{

  bob = 0;

}

/** assuming bob == 0, bob is set to 1 ****/

if(bob == 0 && p1_sw_trig)

{

  bob = 1;

}

/** bob is now 1 and gets set to 0 ****/

if(bob == 1 && p1_sw_trig)

{

  bob = 0;

}

/*** bob is always 0 if the trigger has been pressed ***/

You can fix this with by using an else if.

Code:

static unsigned int bob = 2;



Void Default_Routine(void)

{

  if(bob == 2 && p1_sw_trig)

  {

    bob = 0;

  }

  else if(bob == 0 && p1_sw_trig)

  {

    bob = 1;

  }

  else if(bob == 1 && p1_sw_trig)

  {

    bob = 0;

  }

}

Once you do that you're going to run into the problem that the state is constantly toggling between 0 and 1 when the button is pressed.

This is because there is no way that you as a user will be able to tap the trigger for 1 loop (1/42 of a second) and the trigger will actually be pressed for multiple loops.

What I think you want to do is keep track of the previous button state and only change states if your current state is pressed and your previous is not.

Re: Beginning programmer: Variable question HELP!!!

Quote:

Originally Posted by Calvin

OK i'm going to be setting by my computer refreshing every 30 seconds checking for reply :ahh:

In file user_routines.c, under

/***DEFINE USER VARIBLES AND INITIALIZE THEM HERE ***/
I added:
static unsigned int bob = 2;

------------------------------------------------------------
------------------------------------------------------------
Now under the:
Void Default_Routine(void)
{
if(bob == 2 && p1_sw_trig){bob = 0;}
if(bob == 0 && p1_sw_trig){bob = 1;}
if(bob == 1 && p1_sw_trig){bob = 0;}

}

------------------------------------------------------------
------------------------------------------------------------
Before I click on the trigger, I get the value 2 for bob...
Click on it once, I get 0
click on it again I get 0(it's suppose to change to 1)

WHAT AM I DOING WRONG!?!!?
Please help!

Try this:

Quote:

Void Default_Routine(void)
{
static unsigned int trigger_count = 0;

if(p1_sw_trig)
{
++trigger_count; //sets a trigger counter to control the value
}
else
{
}
if(trigger_count > 1) //Change as needed
{
trigger_count = 0; //Resets trigger count
}
else
{
}

if(bob == 2 && p1_sw_trig && trigger_count == 0)
{
bob = 0;
}
else if(bob == 0 && p1_sw_trig && trigger_count == 1)
{
bob = 1;
}
else
{
}

}

Re: Beginning programmer: Variable question HELP!!!

It takes about 400 to 600 nanoseconds (maybe a bit more) for the three IF statements to execute. You cannot hit the trigger fast enough to satisfy only one IF statement.

The first time through, bob goes from 2 to 0.

The next time though, bob goes from 0 to 1 to 0.

The code is doing exactly what you told it to do...

Regards,

Mike

Re: Beginning programmer: Variable question HELP!!!

wow thanks for the quick reply,
I figured out a way to do it with two buttons. Now it works fine.

I completely forgot about the quick loop, and started questioning my programming skills. :D

PHP Code:


		
			
/////**** Start of RELAY 7 code ****/////

    if(bob7 == 0)

    {

       printf("Bob7 = 0\r");

       relay7_fwd = 1;

    }

    if(bob7 == 1)

    {

       printf("Bob7 = 1\r");

       relay7_fwd = 0;

    }

    if(bob7 == 2){printf("Bob7 = 2\r");}

    

    if(bob7 == 2 && p1_sw_trig){bob7 = 0;}

    if(bob7 == 0 && p1_sw_top){bob7 = 1;}

    if(bob7 == 1 && p1_sw_trig){bob7 = 0;}

/////**** End of RELAY 7 code ****/////