Pushbutton (on/off)

Archiver

I know this has to be simple, but I just can't seem to get it.

I am using a BS2SX and a NX 1000 Experiment Board.

I want to turn an LED on with one push of a button, then turn it off again
with a push of the same button...........Reliably. The time it is pushed
allows a debounce routine (working fine).

Help please!

Lee
--
Registered Linux user #223705

Give me ambiguity or give me something else.

Archiver

You can use the Stamp's ability to alias variables and the bit invert
operator to make this easy. Let's say your LED is on pin 0:

MyLED VAR Out0

Init:
OUTPUT 0

The code above names your pin and sets its direction to output. After you
debounce the switch, you can invert the state of the LED like this:

MyLED = ~MyLED

It's that simple.

-- Jon Williams
-- Parallax


In a message dated 7/4/02 9:51:24 AM Central Daylight Time,
dlwiggers@a... writes:


> I know this has to be simple, but I just can't seem to get it.
>
> I am using a BS2SX and a NX 1000 Experiment Board.
>
> I want to turn an LED on with one push of a button, then turn it off again
> with a push of the same button...........Reliably. The time it is pushed
> allows a debounce routine (working fine).
>
> Help please!
>
>




[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver

Thanks Jon. I have turned the LED on and off neatly now, but what I need is
one step further.

I don't want to change states if I hold the button on. Then regardles of the
time element, I release the button, then push it again and it turns the LED
off.

I have programmed PLC's for years, so I have some learning and unlearning to
do.

I appreciate your help.

Lee

> You can use the Stamp's ability to alias variables and the bit invert
> operator to make this easy. Let's say your LED is on pin 0:
>
> MyLED VAR Out0
>
> Init:
> OUTPUT 0
>
> The code above names your pin and sets its direction to output. After you
> debounce the switch, you can invert the state of the LED like this:
>
> MyLED = ~MyLED
>
> It's that simple.
>
> -- Jon Williams
> -- Parallax
>
>
> In a message dated 7/4/02 9:51:24 AM Central Daylight Time,
>
> dlwiggers@a... writes:
> > I know this has to be simple, but I just can't seem to get it.
> >
> > I am using a BS2SX and a NX 1000 Experiment Board.
> >
> > I want to turn an LED on with one push of a button, then turn it off
> > again with a push of the same button...........Reliably. The time it is
> > pushed allows a debounce routine (working fine).
> >
> > Help please!
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
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--
Registered Linux user #223705

Give me ambiguity or give me something else.