Use more then 1 varaible

[henri]

Hi i've been using phidget cards and real studio for some time but
now that it was time for a expansion I thought let me use the Opencockpit card.
And I can use some help. I want to manage some leds. The leds on or of depend on
more than 1 function.

Var 2, Link FSUIPC_IN Offset $3340, Length 4
var 3, Link FSUIPC_IN offset $092C, length 2
var 4, link FSUIPC_IN offset $3344, length 4 // need this one also
{
L0 = TESTBIT V2,14
if L0 = 0
{
&leds2 = 0
&leds3 = 0

}
else

L1 = TESTBIT V3,0
if L1 = 1
{
&Leds2 = 0
&leds3 = 0

}
else
{
&leds2 = 1
&leds3 = 1
&Leds4 = 1

}
}
var 5, name Leds2 link iocard_out, output 15
var 6, name Leds3 link iocard_out, output 13

I seem to miss something because it's not working. I hope some one can help
to show how to use more then 1 varaible to manage the led.
regards and thnx,
henri

[kiek]

Hi henri,

It does not work because your program does nothing if Var 2 or Var 3 changes value.
You have to take an approach like this (call a subrutine if one of the related variables changes, and in that subroutine you set the leds according to the states of these variables):

Var 2, Link FSUIPC_IN Offset $3340, Length 4 
{
  CALL &CtrlLeds
}

var 3, Link FSUIPC_IN offset $092C, length 2 
{
  CALL &CtrlLeds
}

var 4, link FSUIPC_IN offset $3344, length 4 // need this one also
{
  CALL &CtrlLeds
}


Var 10 Link SUBRUTINE Name CtrlLeds
{
  L0 = TESTBIT V2,14
  if L0 = 0
  {
    &leds2 = 0
    &leds3 = 0
  }
  else
  {
    L1 = TESTBIT V3,0
    if L1 = 1
    {
      &Leds2 = 0
      &leds3 = 0
    }
    else
    {
      &leds2 = 1
      &leds3 = 1
//      &leds4 = 1   not defined ?
    }
  }
}

var 5, name Leds2 link iocard_out, output 15
var 6, name Leds3 link iocard_out, output 13

And I think you have to take Var 4 into account as well (in the subroutine).


regards,
Nico

[henri]

OK so that's how it works. Great and thanks for pointing the right direction.
regards,
Henri