question about 14m button input

[orko007]

i donot have my 014M that i have ordered yet. But I have been reading and working on code already. For sake of this question i will say i want to turn on an led attached to output 0 when a button attached to input 1 is pushed and off when the button is released.

something like
main:
if pin1 = 1 then
high 0
else
low 0
endif
goto main

But my questions comes that i would like to just be able to have a button inbetween 0v and input 1. so when it is pressed it is 0v and not it is floating. is this possible to acomplish what i want and if so what would the logic be? from reading the manuals im not sure if this is possible.

could someone please enlighten my newb mind. Thank you.

 

[MORA99]

You can make a button with just 0V and floating when not pressed, but ofcause a floating pin may think its low or high randomly.

 

[hippy]

If you want your button between input and 0V you also need a pull-up from input to +V.

For a button between input and +V you would need a pull-down from input to 0V.

With a push-to-close button between input and 0V, the input pin will normally read high (1) when not pushed ( pelled up to +V ), and will read low (0) when pushed ( shorted to 0V ).

The logic to turn on a LED when the button is pushed is to turn it on when the input becomes low (0), hence ...<code><pre><font size=2 face='Courier'> If pin1 = 0 Then
High 0 ' Led on, button pushed
Else
Low 0 ' Led off, button not pushed
End If
</font></pre></code> You can also use SYMBOL to give a more elegant and instantly understandable way of writing your code ...<code><pre><font size=2 face='Courier'> Symbol PUSHED = 0

If pin1 Is PUSHED Then
High 0 ' Led on, button pushed
Else
Low 0 ' Led off, button not pushed
End If
</font></pre></code>

 

[orko007]

Thanks Hippy thats what i got from the manual I was just looking for a shortcut in my wiring since once I get my project working the way I want I will be putting together many.