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"""
Implements partial support for Siglent SDS1000X-E series oscilloscopes.
"""
import socket
import re
from lab_control.oscilloscope import Oscilloscope
def _checkChannel(channel):
assert channel in SDS1000XE.AVAILABLE_CHANNELS, "SDS1000X-E: Invalid channel {channel}"
class SDS1000XE(Oscilloscope):
"""
Instances of this class connect to the SDS1000X-E IP
and port and offer an API to control the device.
"""
PORT = 5025
TIMEOUT = 5.0
AVAILABLE_CHANNELS = range(1, 5)
def __init__(self, address):
super().__init__()
self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self._socket.connect((address, SDS1000XE.PORT))
self._socket.settimeout(SDS1000XE.TIMEOUT)
def _measure(self, channel: int, code: str) -> float:
_checkChannel(channel)
pattern = r"C(?P<responseChannel>\d):PAVA .+,(?P<rawMeasurement>[\d.E+-]+)\w+"
query = f"C{channel}:PAVA? {code}\r\n"
self._socket.sendall(query.encode())
try:
# TODO add code to regex
response = self._socket.recv(4096).decode()
matches = re.search(pattern, response)
measurement = float(matches.group("rawMeasurement"))
except TimeoutError:
measurement = None
return measurement
def measureAmplitude(self, channel: int) -> float:
return self._measure(channel, "AMPL")
def measurePeakToPeak(self, channel: int) -> float:
return self._measure(channel, "PKPK")
def measureRMS(self, channel: int) -> float:
return self._measure(channel, "RMS")
def measureFrequency(self, channel: int) -> float:
return self._measure(channel, "FREQ")
def setVoltsPerDivision(self, channel: int, volts: float) -> None:
_checkChannel(channel)
query = f"C{channel}:VDIV {volts:.2E}V\r\n"
self._socket.sendall(query.encode())
# no response expected
def getDivisionsDisplayed(self) -> int:
return 8
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