Public Member Functions
def	__init__
def	cancel
Public Attributes
	callback
	cbA
	cbB
	gpioA
	gpioB
	lastGpio
	levA
	levB
	pi
Private Member Functions
def	_pulse

Detailed Description

Class to decode mechanical rotary encoder pulses.

Definition at line 5 of file rotary_encoder.py.

Constructor & Destructor Documentation

def rotary_encoder.decoder.__init__	(	self,
		pi,
		gpioA,
		gpioB,
		callback
	)

Instantiate the class with the pi and gpios connected to
rotary encoder contacts A and B.  The common contact
should be connected to ground.  The callback is
called when the rotary encoder is turned.  It takes
one parameter which is +1 for clockwise and -1 for
counterclockwise.

EXAMPLE

import time
import pigpio

import rotary_encoder

pos = 0

def callback(way):

   global pos

   pos += way

   print("pos={}".format(pos))

pi = pigpio.pi()

decoder = rotary_encoder.decoder(pi, 7, 8, callback)

time.sleep(300)

decoder.cancel()

pi.stop()

Definition at line 9 of file rotary_encoder.py.

Member Function Documentation

def rotary_encoder.decoder._pulse	(	self,
		gpio,
		level,
		tick
	)	`[private]`

Decode the rotary encoder pulse.

       +---------+         +---------+      0
       |         |         |         |
   A         |         |         |         |
       |         |         |         |
   +---------+         +---------+         +----- 1

 +---------+         +---------+            0
 |         |         |         |
   B   |         |         |         |
 |         |         |         |
   ----+         +---------+         +---------+  1

Definition at line 67 of file rotary_encoder.py.

def rotary_encoder.decoder.cancel ( self )