本文整理汇总了Python中usb1.USBErrorNoDevice方法的典型用法代码示例。如果您正苦于以下问题：Python usb1.USBErrorNoDevice方法的具体用法？Python usb1.USBErrorNoDevice怎么用？Python usb1.USBErrorNoDevice使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类usb1的用法示例。
在下文中一共展示了usb1.USBErrorNoDevice方法的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: read
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def read(self, timeout=0):
if self.usb_inp is not None:
try:
ep_addr = self.usb_inp.getAddress()
frame = self.usb_dev.bulkRead(ep_addr, 300, timeout)
except libusb.USBErrorTimeout:
raise IOError(errno.ETIMEDOUT, os.strerror(errno.ETIMEDOUT))
except libusb.USBErrorNoDevice:
raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))
except libusb.USBError as error:
log.error("%r", error)
raise IOError(errno.EIO, os.strerror(errno.EIO))
if len(frame) == 0:
log.error("bulk read returned zero data")
raise IOError(errno.EIO, os.strerror(errno.EIO))
frame = bytearray(frame)
log.log(logging.DEBUG-1, "<<< %s", hexlify(frame).decode())
return frame 示例2: write
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def write(self, frame, timeout=0):
if self.usb_out is not None:
log.log(logging.DEBUG-1, ">>> %s", hexlify(frame).decode())
try:
ep_addr = self.usb_out.getAddress()
self.usb_dev.bulkWrite(ep_addr, bytes(frame), timeout)
if len(frame) % self.usb_out.getMaxPacketSize() == 0:
self.usb_dev.bulkWrite(ep_addr, b'', timeout)
except libusb.USBErrorTimeout:
raise IOError(errno.ETIMEDOUT, os.strerror(errno.ETIMEDOUT))
except libusb.USBErrorNoDevice:
raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))
except libusb.USBError as error:
log.error("%r", error)
raise IOError(errno.EIO, os.strerror(errno.EIO)) 示例3: closeLink
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def closeLink(self):
if self._dev_handle:
for t in self._writeTransfers:
try:
t.cancel()
except usb1.USBErrorNotFound:
pass
self._writeTransfers = []
if self._linkReader:
self._linkReader.stop()
self._linkReader = None
#if self._incomingQueue:
# self._incomingQueue.stop()
# self._incomingQueue = None
try:
self._dev_handle.releaseInterface(0)
except ( usb1.USBErrorNoDevice, usb1.USBErrorNotFound):
pass
self._dev_handle = None
self._context = None
self._port_id = None
self._eventListener.onLinkClosed()
self._serialLoggerEnabled and self._serialLogger.debug("(X) Link Closed")
# ~~~~~~~ From PrinterCommTransport ~~~~~~~~~~ 示例4: stop
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def stop(self):
self._stopped = True
for x in self._transferList:
if x.isSubmitted():
try:
x.cancel()
except ( usb1.USBErrorNotFound, usb1.USBErrorNoDevice ):
pass
#
# Class to queue incoming commands
# 示例5: FindDevicesSafe
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def FindDevicesSafe(cls, setting_matcher, device_matcher=None,
usb_info='', timeout_ms=None):
"""Safe version of FindDevices.
Like FindDevices, but catch USB exceptions as devices are iterated through.
Yields:
Unopened UsbHandle instances.
"""
ctx = usb1.USBContext()
try:
for device in ctx.getDeviceList(skip_on_error=True):
setting = setting_matcher(device)
if setting is None:
continue
try:
handle = cls(device, setting, usb_info=usb_info,
timeout_ms=timeout_ms)
if device_matcher is None or device_matcher(handle):
yield handle
except (usb1.USBErrorOther, usb1.USBErrorNoDevice) as e:
logging.error(
'Failed to open USB device, is user in group plugdev? %s', e)
continue
except usb1.USBError as e:
logging.error('Failed to get device list: %s', e) 示例6: trezor_exception
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def trezor_exception(f):
def func(*args, **kwargs):
try:
return f(*args, **kwargs)
except ValueError as e:
raise BadArgumentError(str(e))
except Cancelled:
raise ActionCanceledError('{} canceled'.format(f.__name__))
except USBErrorNoDevice:
raise DeviceConnectionError('Device disconnected')
return func 示例7: open
# 需要导入模块: import usb1 [as 别名]
# 或者: from usb1 import USBErrorNoDevice [as 别名]
def open(self, usb_bus, dev_adr):
self.usb_dev = None
self.usb_out = None
self.usb_inp = None
for dev in self.context.getDeviceList(skip_on_error=True):
if ((dev.getBusNumber() == usb_bus and
dev.getDeviceAddress() == dev_adr)):
break
else:
log.error("no device {0} on bus {1}".format(dev_adr, usb_bus))
raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))
try:
first_setting = next(dev.iterSettings())
except StopIteration:
log.error("no usb configuration settings, please replug device")
raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))
def transfer_type(x):
return x & libusb.TRANSFER_TYPE_MASK
def endpoint_dir(x):
return x & libusb.ENDPOINT_DIR_MASK
for endpoint in first_setting.iterEndpoints():
ep_addr = endpoint.getAddress()
ep_attr = endpoint.getAttributes()
if transfer_type(ep_attr) == libusb.TRANSFER_TYPE_BULK:
if endpoint_dir(ep_addr) == libusb.ENDPOINT_IN:
if not self.usb_inp:
self.usb_inp = endpoint
if endpoint_dir(ep_addr) == libusb.ENDPOINT_OUT:
if not self.usb_out:
self.usb_out = endpoint
if not (self.usb_inp and self.usb_out):
log.error("no bulk endpoints for read and write")
raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))
try:
# workaround the PN533's buggy USB implementation
self._manufacturer_name = dev.getManufacturer()
self._product_name = dev.getProduct()
except libusb.USBErrorIO:
self._manufacturer_name = None
self._product_name = None
try:
self.usb_dev = dev.open()
self.usb_dev.claimInterface(0)
except libusb.USBErrorAccess:
raise IOError(errno.EACCES, os.strerror(errno.EACCES))
except libusb.USBErrorBusy:
raise IOError(errno.EBUSY, os.strerror(errno.EBUSY))
except libusb.USBErrorNoDevice:
raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))