class Button:
def __init__(self, buttonPinNumber, buttonPinName, pullupPinNumber, pullupPinName, callback):
self.button = Pin(buttonPinNumber, direction=In, interrupt=Falling, pull=PullUp, suffix="_"+buttonPinName)
self.pullup = Pin(pullupPinNumber, direction=Out, suffix="_"+pullupPinName)
self.epoll = select.epoll()
self.callback = callback
def run(self):
with self.button, self.pullup:
self.pullup._write("value", "1")
self.epoll.register(self.button, select.EPOLLIN|select.EPOLLET)
while True:
events = self.epoll.poll()
self.processEvents(events)
def processEvents(self, events):
for fileno, event in events:
if (fileno == self.button.fileno()) and (self.button.value == 0):
self.callback()
def enable(self):
self.worker = multiprocessing.Process(target=self.run)
self.worker.start()
def disable(self):
print("Not implemented")
class RotaryEncoder:
def __init__(self, aPinNumber, aPinName, aPullupNumber, aPullupName, bPinNumber, bPinName, bPullupNumber, bPullupName, callback):
self.a = Pin(aPinNumber, direction=In, interrupt=Both, pull=PullUp, suffix="_"+aPinName)
self.aPullup = Pin(aPullupNumber, direction=Out, suffix="_"+aPullupName)
self.b = Pin(bPinNumber, direction=In, interrupt=Both, pull=PullUp, suffix="_"+bPinName)
self.bPullup = Pin(bPullupNumber, direction=Out, suffix="_"+bPullupName)
self.epoll = select.epoll()
self.callback = callback
self.seq = (1 ^ 1) | 1 << 1
self.delta = 0
self.deltaaccu = 0
def run(self):
with self.a, self.aPullup, self.b, self.bPullup:
self.aPullup._write("value", "1")
self.bPullup._write("value", "1")
self.epoll.register(self.a, select.EPOLLIN|select.EPOLLET)
self.epoll.register(self.b, select.EPOLLIN|select.EPOLLET)
self.waitForInput()
def waitForInput(self):
while True:
events = self.epoll.poll()
for fileno, event in events:
self.handleEvent(fileno, event)
def handleEvent(self, fileno, event):
if (fileno != self.a.fileno()) and (fileno != self.b.fileno()):
return
a = self.a.value
b = self.b.value
newDelta = 0
newseq = (a ^ b) | b << 1
if newseq == self.seq:
return
newDelta = (newseq - self.seq) % 4
if newDelta == 3:
newDelta = -1
elif newDelta == 2:
newDelta = int(math.copysign(newDelta, self.delta))
self.delta = newDelta
self.deltaaccu += self.delta
if (self.deltaaccu >= 4):
self.deltaaccu = 0
self.callback("left")
elif (self.deltaaccu <= -4):
self.deltaaccu = 0
self.callback("right")
self.seq = newseq
def enable(self):
self.worker = multiprocessing.Process(target=self.run)
self.worker.start()
def disable(self):
print("Not implemented")
#!/usr/bin/python
import select
from gpio import Pin, In, Out, Falling, PullUp
button = Pin(60, direction=In, interrupt=Falling, pull=PullUp, suffix="_pi11")
pullup = Pin(1, direction=Out, suffix="_pg3")
useSelect = True
if useSelect:
with button, pullup:
pullup._write("value", "1")
epoll = select.epoll()
epoll.register(button, select.EPOLLIN|select.EPOLLET)
while True:
events = epoll.poll()
for fileno, event in events:
if fileno == button.fileno():
if (button.value == 0):
print("PRESSED")
else:
with button, pullup:
pullup._write("value", "1")
while True:
if (button.value == 0):
print("PRESSED")