"Latching" variables in function
Denis McMahon
denismfmcmahon at gmail.com
Tue Apr 8 20:28:36 EDT 2014
On Tue, 08 Apr 2014 16:09:28 -0400, Grawburg wrote:
> def button():
> pushbutton = 0
> button_value = 0
> pushbutton=bus.read_byte_data(address,GPIOB)
> if pushbutton > 0:
> button_value = 1
> return button_value
Every time your function is called, you start out with button_value of 0.
You may need a global variable that starts out as False (or 0), and once
flipped to True (or 1) and then stays there:
button_value = False # or: button_value = 0
def button():
global button_value
pushbutton = bus.read_byte_data( address, GPIOB )
if pushbutton > 0:
button_value = True # or: button_value = 1
return button_value
Also I think I'd probably pass the IO address as a parameter to the
button function.
--
Denis McMahon, denismfmcmahon at gmail.com
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