Allow input to read cached data without forcing a GPIO read.

Author: cefn

mcp.py

@@ -107,19 +107,20 @@ def output_pins(self, pins):
  self.write_gpio()
 
 
- def input(self, pin):
+ def input(self, pin, read=True):
  """Read the specified pin and return HIGH/True if the pin is pulled
  high, or LOW/False if pulled low.
  """
- return self.input_pins([pin])[0]
+ return self.input_pins([pin], read)[0]
 
- def input_pins(self, pins):
+ def input_pins(self, pins, read=True):
  """Read multiple pins specified in the given list and return list of pin values
  HIGH/True if the pin is pulled high, or LOW/False if pulled low.
  """
  [self._validate_pin(pin) for pin in pins]
- # Get GPIO state.
- self.read_gpio()
+ if read:
+ # Get GPIO state.
+ self.read_gpio()
  # Return True if pin's bit is set.
  return [(self.gpio[int(pin/8)] & 1 << (int(pin%8))) > 0 for pin in pins]