Source code for instruments.DSensor_ILD1420
# This is the distance(proximity) sensor Class that wraps around
# Micro Epsilon's Data Aquisition Library API (MeDaqLib) for accessing digital
# sensors
# MEDAQLib.dll is needed for this class to operate
# The implementation is targeted for ILD1420-10, but can be easily changed or
# extended
from ctypes import *
import logging
#********************** SENSOR IDs **********************
NO_SENSOR= 0 # Dummy, only for internal use
SENSOR_ILR110x_115x= 19 # optoNCDT ILR
SENSOR_ILR118x= 20 # optoNCDT ILR
SENSOR_ILR1191= 21 # optoNCDT ILR
SENSOR_ILD1302= 24 # optoNCDT
SENSOR_ILD1320= 41 # optoNCDT
SENSOR_ILD1401= 1 # optoNCDT
SENSOR_ILD1402= 23 # optoNCDT
SENSOR_ILD1420= 42 # optoNCDT
SENSOR_ILD1700= 2 # optoNCDT
SENSOR_ILD2200= 5 # optoNCDT
SENSOR_ILD2300= 29 # optoNCDT
SENSOR_IFD2401= 12 # confocalDT
SENSOR_IFD2431= 13 # confocalDT
SENSOR_IFD2445= 39 # confocalDT
SENSOR_IFD2451= 30 # confocalDT
SENSOR_IFD2461= 44 # confocalDT
SENSOR_IFD2471= 26 # confocalDT
SENSOR_ODC1202= 25 # optoCONTROL
SENSOR_ODC2500= 8 # optoCONTROL
SENSOR_ODC2520= 37 # optoCONTROL
SENSOR_ODC2600= 9 # optoCONTROL
SENSOR_LLT27xx= 31 # scanCONTROL+gapCONTROL, only for SensorFinder functionality, OpenSensor will fail
SENSOR_DT3100= 28 # eddyNCDT
SENSOR_DT6100= 16 # capaNCDT
SENSOR_DT6120= 40 # capaNCDT
CONTROLLER_DT6200= 33 # capaNCDT
CONTROLLER_KSS6380= 18 # capaNCDT
CONTROLLER_DT6500= 15 # capaNCDT
#**********************************************************
#********************* ERROR VALUES *********************
ERR_NOERROR= 0
ERR_FUNCTION_NOT_SUPPORTED= -1
ERR_CANNOT_OPEN= -2
ERR_NOT_OPEN= -3
ERR_APPLYING_PARAMS= -4
ERR_SEND_CMD_TO_SENSOR= -5
ERR_CLEARUNG_BUFFER= -6
ERR_HW_COMMUNICATION= -7
ERR_TIMEOUT_READING_FROM_SENSOR= -8
ERR_READING_SENSOR_DATA= -9
ERR_INTERFACE_NOT_SUPPORTED= -10
ERR_ALREADY_OPEN= -11
ERR_CANNOT_CREATE_INTERFACE= -12
ERR_NO_SENSORDATA_AVAILABLE= -13
ERR_UNKNOWN_SENSOR_COMMAND= -14
ERR_UNKNOWN_SENSOR_ANSWER= -15
ERR_SENSOR_ANSWER_ERROR= -16
ERR_SENSOR_ANSWER_TOO_SHORT= -17
ERR_WRONG_PARAMETER= -18
ERR_NOMEMORY= -19
ERR_NO_ANSWER_RECEIVED= -20
ERR_SENSOR_ANSWER_DOES_NOT_MATCH_COMMAND= -21
ERR_BAUDRATE_TOO_LOW= -22
ERR_OVERFLOW= -23
ERR_INSTANCE_NOT_EXIST= -24
ERR_NOT_FOUND= -25
ERR_WARNING= -26
ERR_SENSOR_ANSWER_WARNING= -27
#**********************************************************
[docs]def Error(err, sensor):
''' Read errors from sensor '''
buf = create_string_buffer(1024);
mqlib.GetError(c_ulong(sensor), buf, len(buf))
out = "Error in {}\n{}".format(err, buf.value)
logging.error(out)
return -1
[docs]class DSensor_ILD1420 (object):
def __init__(self, COM_Port, sensor_model = SENSOR_ILD1420):
'''
Constructor
sensor_model (int)
COM_Port (string)
'''
# load the dll
windll.LoadLibrary('../MeDaqLib/MEDAQLib.dll')
self.mqlib = windll.MEDAQLib
if self.mqlib is None:
logging.error('Problem opening MEDAQLib.dll!')
exit()
self.sensor = self.mqlib.CreateSensorInstance(sensor_model)
if self.sensor == 0:
logging.error('Cannot create driver instance!')
exit()
self.COM_Port = c_char_p(COM_Port)
# open sensor
if self.open() < 0:
self.close()
exit()
# make sure output mode is RS422
if self.InterfaceRS422() < 0:
self.close()
exit()
[docs] def Error(self, err):
''' Read errors from sensor '''
buf = create_string_buffer(1024);
self.mqlib.GetError(c_ulong(self.sensor), buf, len(buf))
out = 'Error in {}\n{}'.format(err, buf.value)
logging.error(out)
return -1
[docs] def open(self):
errCode = self.mqlib.OpenSensorRS232(c_ulong(self.sensor), self.COM_Port)
if errCode != ERR_NOERROR:
return self.Error('OpenSensor <{}>'.format(errCode))
return ERR_NOERROR
[docs] def poll(self, n = 1):
''' Retrieves last n values from sensor '''
data = c_double()
errCode = self.mqlib.Poll(c_ulong(self.sensor), None, byref(data), c_int(n))
if errCode != ERR_NOERROR:
self.Error('Poll <{}>'.format(errCode))
self.close()
exit()
return data.value
[docs] def InterfaceRS422(self):
sensorCommand = c_char_p('Set_DataOutInterface')
paramName = c_char_p('SP_DataOutInterface')
paramValue = c_int(1) # 1 = RS422
errCode = self.mqlib.SetIntExecSCmd(c_ulong(self.sensor), sensorCommand, paramName, paramValue)
if errCode != ERR_NOERROR:
return self.Error('SetIntExecSCmd <{}>'.format(errCode))
return ERR_NOERROR
[docs] def close(self):
if self.sensor != 0:
if self.mqlib.CloseSensor(c_ulong(self.sensor)) != ERR_NOERROR:
logging.error('Cannot close sensor!')
if self.mqlib.ReleaseSensorInstance(c_ulong(self.sensor)) != ERR_NOERROR:
logging.error('Cannot release driver instance!')
'''
Copyright (C) 2017 Robert Polster
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
