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"""
Implements partial support for Joy-IT JDS6600 function generator.
"""
import serial
from lab_control.function_generator import FunctionGenerator
def _checkChannel(channel: int):
assert channel in JDS6600.AVAILABLE_CHANNELS, f"JDS6600: Invalid channel {channel}"
def _checkArg(arg: float, lowerBound: float, upperBound: float):
valid = arg is not None
if valid:
valid &= arg >= lowerBound
valid &= arg <= upperBound
assert valid, f"JDS6600: Invalid argument {arg}"
class JDS6600(FunctionGenerator):
"""
Instances of this class bind to the JDS6600 serial port
and offer an API to control the device.
"""
AVAILABLE_CHANNELS = [1, 2]
SINE = 0
SQUARE = 1
TRIANGULAR = 3
def __init__(self, portName):
super().__init__()
self._port = serial.Serial(portName)
self._port.baudrate = 115200
self._port.bytesize = serial.EIGHTBITS
self._port.stopbits = serial.STOPBITS_ONE
self._port.parity = serial.PARITY_NONE
def closePort(self) -> None:
"""
Close the serial port. Instances of this class
are no longer usable after this is called.
"""
self._port.close()
def _queryOnOff(self) -> list[str, str]:
# response format: ":r20=0,0."
response = self._sendRequest("r20")
return [response[5], response[7]]
def _sendRequest(self, opcode: str, args: str="") -> str:
request = f":{opcode}={args}.\r\n"
self._port.write(request.encode())
responseRaw = self._port.readline()
return responseRaw.decode().strip()
def setOn(self, channel: int) -> None:
_checkChannel(channel)
state = self._queryOnOff()
state[channel - 1] = "1"
self._sendRequest("w20", f"{state[0]},{state[1]}")
def setOff(self, channel: int) -> None:
_checkChannel(channel)
state = self._queryOnOff()
state[channel - 1] = "0"
self._sendRequest("w20", f"{state[0]},{state[1]}")
def setFrequency(self, channel: int, frequency: float) -> None:
_checkChannel(channel)
_checkArg(frequency, 0.0, 60e6)
opcode = f"w{23 + channel - 1}"
arg = int(frequency * 100.0)
self._sendRequest(opcode, str(arg))
def setAmplitude(self, channel: int, amplitude: float) -> None:
_checkChannel(channel)
_checkArg(amplitude, 0.0, 20.0)
opcode = f"w{25 + channel - 1}"
arg = int(amplitude * 1000.0)
self._sendRequest(opcode, str(arg))
def setFunction(self, channel: int, function: int) -> None:
_checkChannel(channel)
_checkArg(function, 0, 16)
opcode = f"w{21 + channel - 1}"
self._sendRequest(opcode, str(function))
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