PCFPin

class pcf8574pin.PCFPin(pcf, pin)

Class to mimic machine.Pin or machine.Signal classes + more

This class aims to add compatibility for PCF8574 class with other classes which use Pin class like the asynchronous switch class “aswitch”.

Parameters:

• pcf – PCF8574 device
• pin – pin to monitor

input()

Set the pin as input

inverted()

Set the pin as inverted

mode(value=None, invert=False)

Get or set the pin mode (input or output)

Parameters:

• value (str, optional) – “IN” or “OUT”
• invert (bool, optional) – True inverted pin, False non inverted pin. Default to False.

Returns:

1 for input, 0 for output

Return type:

int

noninverted()

Set the pin as non inverted

off()

Desactivate the pin

on()

Activate the pin

output()

Set the pin as output

toggle()

Toggle the pin in output mode

value(value=None)

Get or set the value of the pin

If an argument argument is supplied, the pin is set to the value

Parameters:value (bool, optional) Returns:logical value of the pin Return type:int