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Olivier Kaufmann authored7a182dac
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from ohmpi.hardware_components import CtlAbstract
import board # noqa
import busio # noqa
from adafruit_extended_bus import ExtendedI2C # noqa
import minimalmodbus # noqa
import os
from ohmpi.utils import get_platform, enforce_specs
from gpiozero import CPUTemperature # noqa
import warnings
# hardware characteristics and limitations
SPECS = {'model': {'default': os.path.basename(__file__).rstrip('.py')},
'voltage': {'default': 12., 'max': 50., 'min': 0.},
'modbus_baudrate': {'default': 19200},
'modbus_bitesize': {'default': 8},
'modbus_timeout': {'default': 1},
'modbus_debug': {'default': False},
'modbus_parity': {'default': 'N'},
'modbus_mode': {'default': minimalmodbus.MODE_RTU},
'modbus_port': {'default': '/dev/ttyUSB0'},
'modbus_slave_address': {'default': 1}
}
class Ctl(CtlAbstract):
def __init__(self, **kwargs):
if 'model' not in kwargs.keys():
for key in SPECS.keys():
kwargs = enforce_specs(kwargs, SPECS, key)
subclass_init = False
else:
subclass_init = True
super().__init__(**kwargs)
self.interfaces = dict()
# None interface for battery
self.interfaces['none'] = None
# warnings.filterwarnings("error") # to filter out adafruit warning about setting I2C frequency
# I2C
warnings.filterwarnings(RuntimeWarning, action='ignore', module=busio)
try:
self.interfaces['i2c'] = busio.I2C(board.SCL, board.SDA) # noqa
except Exception as e:
self.exec_logger.warning(f'Could not initialize I2C:\n{e}')
# warnings.resetwarnings()
# Extended I2C
warnings.filterwarnings(RuntimeWarning, action='ignore', module=ExtendedI2C)
try:
self.interfaces['i2c_ext'] = ExtendedI2C(4) # 4 is defined
except Exception as e:
self.exec_logger.warning(f'Could not initialize Extended I2C:\n{e}')
# modbus
try:
self.interfaces['modbus'] = minimalmodbus.Instrument(port=kwargs['modbus_port'],
slaveaddress=kwargs['modbus_slave_address'])
self.interfaces['modbus'].serial.baudrate = kwargs['modbus_baudrate'] # Baud rate 9600 as listed in doc
self.interfaces['modbus'].serial.bytesize = kwargs['modbus_bitesize'] #
self.interfaces['modbus'].serial.timeout = kwargs['modbus_timeout'] # greater than 0.5 for it to work
self.interfaces['modbus'].debug = kwargs['modbus_debug'] #
self.interfaces['modbus'].serial.parity = kwargs['modbus_parity'] # No parity
self.interfaces['modbus'].mode = kwargs['modbus_mode'] # RTU mode
except Exception as e:
self.exec_logger.warning(f'Could not initialize Extended modbus:\n{e}')
platform, on_pi = get_platform()
assert on_pi
self.model = platform
self._cpu_temp_available = True
self.max_cpu_temp = 85. # °C
@property
def _cpu_temp(self):
return CPUTemperature().temperature