vapor_logging.setup_logging(default_path='logging_emulator.json')
logger.info("========================================")
logger.info("Starting DeviceBus Emulator.")
if hardware == devicebus.DEVICEBUS_RPI_HAT_V1:
import devicebus_interfaces.plc_rpi_v1 as plc_rpi_v1
for x in range(2):
config = plc_rpi_v1.OPENDCRE_DEFAULT_CONFIGURATION
# FIXME: the emulator is a subordinate device on the bus, and needs to handle
# FIXME: auto_sleep differently than the master, where we instead receive a WUM and need to wake
# FIXME: ourselves up based on the incoming WUM. For most testing purposes, this is not terrifically
# FIXME: useful or necessary, but is something that should be added here when possible.
config['auto_sleep'] = False
config['auto_wum'] = False
plc_rpi_v1.wake() # just to be on the safe side
plc_rpi_v1.configure(serial_device=emulatorDevice, configuration=config)
# the JSON configuration file name is
# passed in as the second parameter to this program
configFile = sys.argv[2]
emulator_data = open(configFile, "r")
data = emulator_data.read()
configuration = json.loads(data)
while True:
try:
main(emulatorDevice)
except Exception as e:
logger.error("Exception encountered processing packet. (%s)", e)
def __init__(self,
hardware_type=DEVICEBUS_UNKNOWN_HARDWARE,
device_name=None,
timeout=0.25):
""" Create a new instance of the DeviceBus used to communicate with
devices on the device bus.
Depending on the hardware_type, different configuration actions may be
taken. This also sets up the serial_device based on device_name, which
is used for reads/writes/flushes.
hardware_type is the type of hardware to initialize the DeviceBus with:
DEVICEBUS_RPI_HAT_V1 : Configure the RPI V1 HAT (OpenDCRE) for PLC.
DEVICEBUS_VEC_V1 : Configure the V1 VEC (Vapor CORE) for PLC. (Not implemented)
DEVICEBUS_EMULATOR_V1 : Configure the serial emulator.
device_name is the name of the serial device on the local system that
is used for serial communications (e.g. /dev/ttyAMA0 on RPI).
timeout is the time, in seconds, before a read or write operation times
out on the serial device.
"""
if device_name is None:
logger.error(
"Attempt to initialize DeviceBus with no device_name.")
raise ValueError(
"Must specify a valid device_name for serial device.")
self.hardware_type = hardware_type
self.serial_device_name = device_name
self.timeout = timeout
self.speed_bps = DEVICEBUS_DEFAULT_BPS
# first, configure the hardware itself, based on hardware type
if self.hardware_type == DEVICEBUS_RPI_HAT_V1:
import devicebus_interfaces.plc_rpi_v1 as plc_rpi_v1
try:
# First, wake up the SIG60
plc_rpi_v1.wake()
logger.debug("Wake succeeded for PLC modem.")
except plc_rpi_v1.WakeException:
# if wake fails, log and move on - TODO: retry
logger.error(
"Unable to wake PLC modem - modem may not be awake, and communication errors may result."
)
plc_rpi_v1.configure(
serial_device=self.serial_device_name,
configuration=plc_rpi_v1.OPENDCRE_DEFAULT_CONFIGURATION)
self.speed_bps = plc_rpi_v1.OPENDCRE_DEFAULT_CONFIGURATION[
'bit_rate']
elif self.hardware_type == DEVICEBUS_VEC_V1:
raise NotImplementedError("VEC_V1 is not yet supported.")
elif self.hardware_type == DEVICEBUS_EMULATOR_V1:
# no special hardware config needed
pass
else:
logger.error("Invalid hardware_type for reading device bus. (%d)",
self.hardware_type)
raise ValueError(
"Must specify a valid hardware_type for device bus.")
# at this point, the serial connection is ready to go,
# so set up the serial_device based on device_name
self.serial_device = serial.Serial(self.serial_device_name,
self.speed_bps,
timeout=self.timeout)
self.flush_all()
logger.debug(
"Initialized DeviceBus with hardware: %d device_name: %s speed: %d timeout: %d",
self.hardware_type, self.serial_device_name, self.speed_bps,
self.timeout or 0)
def __init__(self, hardware_type=DEVICEBUS_UNKNOWN_HARDWARE, device_name=None, timeout=0.25):
""" Create a new instance of the DeviceBus used to communicate with
devices on the device bus.
Depending on the hardware_type, different configuration actions may be
taken. This also sets up the serial_device based on device_name, which
is used for reads/writes/flushes.
hardware_type is the type of hardware to initialize the DeviceBus with:
DEVICEBUS_RPI_HAT_V1 : Configure the RPI V1 HAT (OpenDCRE) for PLC.
DEVICEBUS_VEC_V1 : Configure the V1 VEC (Vapor CORE) for PLC. (Not implemented)
DEVICEBUS_EMULATOR_V1 : Configure the serial emulator.
device_name is the name of the serial device on the local system that
is used for serial communications (e.g. /dev/ttyAMA0 on RPI).
timeout is the time, in seconds, before a read or write operation times
out on the serial device.
"""
if device_name is None:
logger.error("Attempt to initialize DeviceBus with no device_name.")
raise ValueError("Must specify a valid device_name for serial device.")
self.hardware_type = hardware_type
self.serial_device_name = device_name
self.timeout = timeout
self.speed_bps = DEVICEBUS_DEFAULT_BPS
# first, configure the hardware itself, based on hardware type
if self.hardware_type == DEVICEBUS_RPI_HAT_V1:
import devicebus_interfaces.plc_rpi_v1 as plc_rpi_v1
try:
# First, wake up the SIG60
plc_rpi_v1.wake()
logger.debug("Wake succeeded for PLC modem.")
except plc_rpi_v1.WakeException:
# if wake fails, log and move on - TODO: retry
logger.error("Unable to wake PLC modem - modem may not be awake, and communication errors may result.")
plc_rpi_v1.configure(
serial_device=self.serial_device_name, configuration=plc_rpi_v1.OPENDCRE_DEFAULT_CONFIGURATION
)
self.speed_bps = plc_rpi_v1.OPENDCRE_DEFAULT_CONFIGURATION["bit_rate"]
elif self.hardware_type == DEVICEBUS_VEC_V1:
raise NotImplementedError("VEC_V1 is not yet supported.")
elif self.hardware_type == DEVICEBUS_EMULATOR_V1:
# no special hardware config needed
pass
else:
logger.error("Invalid hardware_type for reading device bus. (%d)", self.hardware_type)
raise ValueError("Must specify a valid hardware_type for device bus.")
# at this point, the serial connection is ready to go,
# so set up the serial_device based on device_name
self.serial_device = serial.Serial(self.serial_device_name, self.speed_bps, timeout=self.timeout)
self.flush_all()
logger.debug(
"Initialized DeviceBus with hardware: %d device_name: %s speed: %d timeout: %d",
self.hardware_type,
self.serial_device_name,
self.speed_bps,
self.timeout or 0,
)