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How to use _pinch method in uiautomator

Best Python code snippet using uiautomator

protocol.py

Source:protocol.py

...14GPIO_MODE_OUTPUT = "O"15GPIO_READ       = "?"16GPIO_VALUE_HIGH = "1"17GPIO_VALUE_LOW  = "0"18def _pinch(channel):19  return chr(channel+ord('a'))20    21def _valuech(value):22  if value == None or value == 0 or value == False:23    return GPIO_VALUE_LOW24  return GPIO_VALUE_HIGH25    26def _modech(mode):27  if mode == None or mode == IN:28    return GPIO_MODE_INPUT29  return GPIO_MODE_OUTPUT30# Needed for Server later  31#def _parse_pinch(ch):32#  pass #TODO inverse of _pinch33#  34def _parse_valuech(ch):35  if ch == GPIO_VALUE_LOW:36    return False37  if ch == GPIO_VALUE_HIGH:38    return True39  error("Unknown value ch:" + ch)40  return GPIO_VALUE_HIGH41    42#def _parse_modech(ch):43#  pass #TODO inverse of _modech44  45  46# CLIENT ===============================================================47# Client will be constructed like: g = GPIOClient(Serial("/dev/ttyAMC0"))48# Client will be called via an interface just like RPi.GPIO49class GPIOClient:50  """ The GPIO command set 51      Assumes the wire protocol is already in the GPIO mode.52      As we only support the GPIO module at the moment,53      that's a simple assumption to make.54  """55  IN = 056  OUT = 157  DEBUG = False58  59  def trace(self, msg):60    if self.DEBUG:61      trace(msg)62  63  def __init__(self, wire, debug=False):64    self.wire = wire65    self.DEBUG = debug66    67  def setmode(self, mode):68    #BCM or BOARD, only for compatibility with RPi.GPIO69    pass  70  def setup(self, channel, mode):71    #TODO outer wrapper needs to do validation72    #if channel < self.MIN_PIN or channel > self.MAX_PIN:73    #  raise ValueError("Invalid pin")    74    pinch = _pinch(channel)75    modech = _modech(mode)76    self._write(pinch + modech)77    #TODO read and verify echoback78  def input(self, channel):79    #self.trace("READ")80    #TODO outer wrapper needs to do validation81    #if channel < self.MIN_PIN or channel > self.MAX_PIN:82    #  raise ValueError("Invalid pin")    83    pinch = _pinch(channel)84    self._write(pinch + GPIO_READ + "\n")85    while True:86      v = self._read(3, termset="\r\n")87      if len(v) == 3:88        break89      self.trace("retrying")90      91    self.trace("input read back:" + v + " len:" + str(len(v)))92    if len(v) == 1:93      self.trace("single returned char is ord:" + str(ord(v[0])))94    valuech = v[1]95    return _parse_valuech(valuech)96  def output(self, channel, value):97    #TODO outer wrapper needs to do validation98    #if channel < self.MIN_PIN or channel > self.MAX_PIN:99    #  raise ValueError("Invalid pin")    100    ch = _pinch(channel)101    v = _valuech(value)102    if value == None or value == 0 or value == False:103      self._write(ch + GPIO_VALUE_LOW + "\n")104    else:105      self._write(ch + GPIO_VALUE_HIGH + "\n")106    #TODO read and verify echoback107  def cleanup(self):108    pass109  # redirector to wrapped comms link110  def _open(self, *args, **kwargs):111    self.trace("open")112    self.wire.open(*args, **kwargs)113  def _write(self, *args, **kwargs):114    self.trace("write:" + str(*args) + " " + str(**kwargs))115    self.wire.write(*args, **kwargs)116  def _read(self, *args, **kwargs):117    self.trace("read")118    return self.wire.read(*args, **kwargs)119    120  def _close(self):121    self.trace("close")122    self.wire.close()123# SERVER ===============================================================124#125# The server is not needed yet, this is just a placeholder for later.126# We will use this to build a server listening on a network port,127# that accepts protocol commands and reroutes them to a local GPIO128# instance (allowing remote IO over the net or any other links)129#130# This is the server.131# Commands sent in are parsed and dispatched to methods132# server will be constructed like: 133#   s = GPIOServer(Serial("/dev/ttyAMA0"), RPi.GPIO)134# or135#   s = GPIOServer(Net("localhost", 8888), sim.GPIO)136# (auto starts)137#   ...138#  s.stop()139# Do we open and close the port in here?140# How does Net wrap network.py, does it do the start() and stop()141#class GPIOServer:142#  """ A server that accepts wire protocol commands143#      and dispatches those to a real GPIO implementation.144#  """145#  def __init__(self, wire, gpio):146#    self.wire = wire147#    self.gpio = gpio148#     149#  # The wrapping server class calls this function when it receives data150#  151#  def receive(self, msg, reply):152#    msg = msg.trim()153#    #Might be multiple commands in a single message, all 2 chars long154#    #TODO change this into a resumable state machine, 155#    #otherwise they must always come in together in the same call, 156#    #which they might not do over serial157#    #Just push this into a _machine() handler and pump chars to it158#    #from here.159#    160#    while len(msg) >= 2:161#      # Consume and parse 2 chars at a time162#      msgpart = msg[:2]163#      msg = msg[2:]164#      165#  def _process(self, msg):166#    # This is always called with 2 chars167#    pinch = msg[0]168#    valuech = msg[1]169#    170#    channel = _parse_pinch(pinch)171#    if   valuech == GPIO_MODE_INPUT:172#      self._setup(channel, IN)173#      174#    elif valuech == GPIO_MODE_OUTPUT:175#      self._setup(channel, OUT)176#      177#    elif valuech == GPIO_VALUE_HIGH:178#      self._output(channel, True)179#      180#    elif valuech == GPIO_VALUE_LOW:181#      self._output(channel, False)182#      183#    elif valuech == GPIO_READ:184#      pinval = self._read(channel)...

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