81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
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import serial
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import serial.tools.list_ports
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from enum import Enum
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class libreCAL:
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def __init__(self, serialnum = ''):
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self.ser = None
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for p in serial.tools.list_ports.comports():
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if p.vid == 0x0483 and p.pid == 0x4122:
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self.ser = serial.Serial(p.device, timeout = 1)
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idn = self.SCPICommand("*IDN?").split("_")
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if idn[0] != "LibreCAL":
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continue
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self.serial = idn[1]
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if len(serialnum) > 0:
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# serial number specified, compare
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if self.serial != serialnum:
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self.ser = None
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continue
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break
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if self.ser == None:
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if len(serialnum) > 0:
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raise Exception("LibreCAL with serial number '"+serialnum+"' not detected")
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else:
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raise Exception("No LibreCAL device detected")
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def getSerial(self) -> str:
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return self.serial
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class Standard(Enum):
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NONE = 0,
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OPEN = 1,
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SHORT = 2,
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LOAD = 3,
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THROUGH = 4
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def reset(self):
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self.SCPICommand(":PORT 1 NONE")
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self.SCPICommand(":PORT 2 NONE")
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self.SCPICommand(":PORT 3 NONE")
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self.SCPICommand(":PORT 4 NONE")
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def setPort(self, s : Standard, port, port2 = -1):
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if s == self.Standard.THROUGH and port2 == -1:
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raise Exception("When setting a port to THROUGH, the destination port must also be specified")
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cmd = ":PORT "+str(port)+" "+s.name
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if s == self.Standard.THROUGH:
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cmd += " "+str(port2)
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if len(self.SCPICommand(cmd)) == 0:
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return True
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else:
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return False
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def getPort(self, port):
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resp = self.SCPICommand(":PORT? "+str(port)).split(" ")[0]
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try:
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s = self.Standard[resp]
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return s
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except:
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raise Exception("LibreCAL reported unknown standard '"+resp+"'")
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def getTemperature(self):
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return float(self.SCPICommand(":TEMP?"))
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def isStable(self) -> bool:
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if self.SCPICommand(":TEMP:STABLE?") == "TRUE":
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return True
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else:
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return False
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def getHeaterPower(self):
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return float(self.SCPICommand(":HEAT:POW?"))
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def SCPICommand(self, cmd: str) -> str:
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self.ser.write((cmd+"\r\n").encode())
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resp = self.ser.readline().decode("ascii")
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if len(resp) == 0:
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raise Exception("Timeout occurred in communication with LibreCAL")
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if resp.strip() == "ERROR":
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raise Exception("LibreCAL returned 'ERROR' for command '"+cmd+"'")
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return resp.strip()
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