def open(self):
'''Open the serial port.
When the serial port is instantiated, it will try to open automatically.
'''
self.close()
device = usb.get_usb_device(self.portstr)
if not device:
raise SerialException("Device not present {}".format(self.portstr))
if not usb.has_usb_permission(device):
usb.request_usb_permission(device)
return
connection = usb.get_usb_manager().openDevice(device)
if not connection:
raise SerialException("Failed to open device!")
self._device = device
self._connection = connection
raw_descriptors = self._connection.getRawDescriptors()
self._bcd_device = raw_descriptors[12] + raw_descriptors[13] * 256
for i in range(self._device.getInterfaceCount()):
if i == 0:
self._interface = self._device.getInterface(i)
if not self._connection.claimInterface(
self._device.getInterface(i), True):
raise SerialException(
"Could not claim interface {}.".format(i))
self._index = self._interface.getId() + 1
for i in range(self._interface.getEndpointCount()):
ep = self._interface.getEndpoint(i)
if (
(ep.getDirection() == usb.UsbConstants.USB_DIR_IN) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_INT)
):
self._control_endpoint = ep
elif (
(ep.getDirection() == usb.UsbConstants.USB_DIR_IN) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_BULK)
):
self._read_endpoint = ep
elif (
(ep.getDirection() == usb.UsbConstants.USB_DIR_OUT) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_BULK)
):
self._write_endpoint = ep
# Check that all endpoints are good
if None in [self._write_endpoint, self._read_endpoint]:
raise SerialException("Could not establish all endpoints!")
self.is_open = True
self._reconfigure_port()
def open(self):
"""Open the serial port.
When the serial port is instantiated, it will try to open automatically.
"""
self.close()
device = usb.get_usb_device(self.portstr)
if not device:
raise SerialException("Device not present {}".format(self.portstr))
if not usb.has_usb_permission(device):
usb.request_usb_permission(device)
return
connection = usb.get_usb_manager().openDevice(device)
if not connection:
raise SerialException("Failed to open device!")
self._device = device
self._connection = connection
if self._device.getInterfaceCount() == 1:
# Device might be castrated ACM device. Try single interface logic.
self._open_single_interface()
else:
# Try default interface logic.
self._open_interface()
# Check that all endpoints are good
if None in [
self._control_endpoint, self._write_endpoint,
self._read_endpoint
]:
raise SerialException("Could not establish all endpoints!")
self.is_open = True
self._set_dtr_rts(self._dtr_state, self._rts_state)
self._reconfigure_port()
def open(self):
'''Open the serial port.
When the serial port is instantiated, it will try to open automatically.
'''
self.close()
device = usb.get_usb_device(self.portstr)
if not device:
raise SerialException("Device not present {}".format(self.portstr))
if not usb.has_usb_permission(device):
usb.request_usb_permission(device)
return
connection = usb.get_usb_manager().openDevice(device)
if not connection:
raise SerialException("Failed to open device!")
self._device = device
self._connection = connection
for i in range(self._device.getInterfaceCount()):
if not self._connection.claimInterface(
self._device.getInterface(i),
True
):
raise SerialException("Could not claim interface {}.".format(i))
self._interface = self._device.getInterface(
self._device.getInterfaceCount() - 1
)
for i in range(self._interface.getEndpointCount()):
ep = self._interface.getEndpoint(i)
if (
(ep.getDirection() == usb.UsbConstants.USB_DIR_IN) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_INT)
):
self._control_endpoint = ep
elif (
(ep.getDirection() == usb.UsbConstants.USB_DIR_IN) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_BULK)
):
self._read_endpoint = ep
elif (
(ep.getDirection() == usb.UsbConstants.USB_DIR_OUT) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_BULK)
):
self._write_endpoint = ep
# Check that all endpoints are good
if None in [self._write_endpoint, self._read_endpoint]:
raise SerialException("Could not establish all endpoints!")
# Enable UART
self._ctrl_transfer_out(self.CP210X_IFC_ENABLE, self.UART_ENABLE)
# Set Baud Div
self._ctrl_transfer_out(
self.CP210X_SET_BAUDDIV,
self.BAUD_RATE_GEN_FREQ / self.DEFAULT_BAUDRATE
)
self.is_open = True
# Set DTR and RTS
self.dtr = True
self.rts = True
self._reconfigure_port()
def open(self):
'''Open the serial port.
When the serial port is instantiated, it will try to open automatically.
'''
self.close()
device = usb.get_usb_device(self.portstr)
if not device:
raise SerialException("Device not present {}".format(self.portstr))
if not usb.has_usb_permission(device):
usb.request_usb_permission(device)
return
connection = usb.get_usb_manager().openDevice(device)
if not connection:
raise SerialException("Failed to open device!")
self._device = device
self._connection = connection
for i in range(self._device.getInterfaceCount()):
if not self._connection.claimInterface(
self._device.getInterface(i), True):
raise SerialException(
"Could not claim interface {}.".format(i))
self._interface = self._device.getInterface(
self._device.getInterfaceCount() - 1)
for i in range(self._interface.getEndpointCount()):
ep = self._interface.getEndpoint(i)
if (
(ep.getDirection() == usb.UsbConstants.USB_DIR_IN) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_INT)
):
self._control_endpoint = ep
elif (
(ep.getDirection() == usb.UsbConstants.USB_DIR_IN) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_BULK)
):
self._read_endpoint = ep
elif (
(ep.getDirection() == usb.UsbConstants.USB_DIR_OUT) \
and (ep.getType() == usb.UsbConstants.USB_ENDPOINT_XFER_BULK)
):
self._write_endpoint = ep
# Check that all endpoints are good
if None in [
self._control_endpoint, self._read_endpoint,
self._write_endpoint
]:
raise SerialException("Could not establish all endpoints!")
if self._device.getDeviceClass() == usb.UsbConstants.USB_CLASS_COMM:
self._device_type = self.DEVICE_TYPE_0
else:
raw_descriptors = self._connection.getRawDescriptors()
max_packet_size_0 = raw_descriptors[7]
if max_packet_size_0 == 64:
self._device_type = self.DEVICE_TYPE_HX
elif (
self._device.getDeviceClass() == \
usb.UsbConstants.USB_CLASS_PER_INTERFACE
or self._device.getDeviceClass() == \
usb.UsbConstants.USB_CLASS_VENDOR_SPEC
):
self._device_type = self.DEVICE_TYPE_1
else:
# Unknown device sub type, assume DEVICE_TYPE_HX.
self._device_type = self.DEVICE_TYPE_HX
self._init_device()
self.is_open = True
self._set_dtr_rts(self._dtr_state, self._rts_state)
self._reconfigure_port()