bmarechal / datalogger-gui

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Commit b383042b0b63956ce4dceb15409f0c45415fa0e6

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1 parent 6a7849f48a
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instruments/TPG261.py
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from abstract_instrument import abstract_instrument 1 1 from abstract_instrument import abstract_instrument
import serial 2 2 import serial
3 3
#============================================================================== 4 4 #==============================================================================
5 5
ALL_VAL_TYPE = ['PRE'] 6 6 ALL_VAL_TYPE = ['PRE']
ALL_CHANNELS = ['1'] 7 7 ALL_CHANNELS = ['1']
ADRESS = "/dev/ttyS0" 8 8 ADRESS = "/dev/ttyS0"
9 9
#============================================================================== 10 10 #==============================================================================
11 11
class TPG261(abstract_instrument): 12 12 class TPG261(abstract_instrument):
def __init__(self, channels, vtypes, adress): 13 13 def __init__(self, channels, vtypes, adress):
self.adress = adress 14 14 self.adress = adress
self.channels = channels 15 15 self.channels = channels
self.vtypes = vtypes 16 16 self.vtypes = vtypes
17 17
def model(self): 18 18 def model(self):
return "PfeifferTPG261" 19 19 return "PfeifferTPG261"
20 20
def connect(self): 21 21 def connect(self):
print('Connecting to device @%s...' %(self.adress)) 22 22 print('Connecting to device @%s...' %(self.adress))
self.TPG = MaxiGauge(self.adress) 23 23 self.TPG = MaxiGauge(self.adress)
print(' --> Ok') 24 24 print(' --> Ok')
print(self.model()) 25 25 print(self.model())
self.configure() 26 26 self.configure()
27 27
def configure(self): 28 28 def configure(self):
pass 29 29 pass
30 30
def getValue(self): 31 31 def getValue(self):
self.read() 32 32 self.read()
return "%s\n"%self.ps[0].pressure 33 33 return "%s\n"%self.ps[0].pressure
34 34
def read(self): 35 35 def read(self):
self.ps = self.TPG.pressures() 36 36 self.ps = self.TPG.pressures()
37 37
def disconnect(self): 38 38 def disconnect(self):
self.TPG.disconnect() 39 39 self.TPG.disconnect()
40 40
def send(self, command): 41 41 def send(self, command):
pass 42 42 pass
43 43
44 44
45 45
46 46
# from Philipp Klaus, philipp.l.klaus AT web.de PfeifferVacuum.py 47 47 # from Philipp Klaus, philipp.l.klaus AT web.de PfeifferVacuum.py
48 48
class MaxiGauge (object): 49 49 class MaxiGauge (object):
def __init__(self, serialPort, baud=9600, debug=False): 50 50 def __init__(self, serialPort, baud=9600, debug=False):
self.debug=debug 51 51 self.debug=debug
try: 52 52 try:
self.connection = serial.Serial(serialPort, baudrate=baud, timeout=0.2) 53 53 self.connection = serial.Serial(serialPort, baudrate=baud, timeout=0.2)
except serial.serialutil.SerialException as se: 54 54 except serial.serialutil.SerialException as se:
raise MaxiGaugeError(se) 55 55 raise MaxiGaugeError(se)
#self.send(C['ETX']) ### We might reset the connection first, but it doesn't really matter: 56 56 #self.send(C['ETX']) ### We might reset the connection first, but it doesn't really matter:
57 57
def checkDevice(self): 58 58 def checkDevice(self):
message = "The Display Contrast is currently set to %d (out of 20).\n" % self.displayContrast() 59 59 message = "The Display Contrast is currently set to %d (out of 20).\n" % self.displayContrast()
message += "Keys since MaxiGauge was switched on: %s (out of 1,2,3,4,5).\n" % ", ".join( map (str, self.pressedKeys()) ) 60 60 message += "Keys since MaxiGauge was switched on: %s (out of 1,2,3,4,5).\n" % ", ".join( map (str, self.pressedKeys()) )
return message 61 61 return message
62 62
def pressedKeys(self): 63 63 def pressedKeys(self):
keys = int(self.send('TKB',1)[0]) 64 64 keys = int(self.send('TKB',1)[0])
pressedKeys = [] 65 65 pressedKeys = []
for i in [4,3,2,1,0]: # It's got 5 keys 66 66 for i in [4,3,2,1,0]: # It's got 5 keys
if keys/2**i == 1: 67 67 if keys/2**i == 1:
pressedKeys.append(i+1) 68 68 pressedKeys.append(i+1)
keys = keys%2**i 69 69 keys = keys%2**i
pressedKeys.reverse() 70 70 pressedKeys.reverse()
return pressedKeys 71 71 return pressedKeys
72 72
def displayContrast(self,newContrast=-1): 73 73 def displayContrast(self,newContrast=-1):
if newContrast == -1: return int(self.send('DCC',1)[0]) 74 74 if newContrast == -1: return int(self.send('DCC',1)[0])
else: return int(self.send('DCC,%d' % (newContrast,) ,1)[0]) 75 75 else: return int(self.send('DCC,%d' % (newContrast,) ,1)[0])
76 76
def pressures(self): 77 77 def pressures(self):
return [self.pressure(i+1) for i in range(1)] 78 78 return [self.pressure(i+1) for i in range(1)]
79 79
def pressure(self, sensor): 80 80 def pressure(self, sensor):
if sensor < 1 or sensor >6: raise MaxiGaugeError('Sensor can only be between 1 and 6. You choose ' + str(sensor)) 81 81 if sensor < 1 or sensor >6: raise MaxiGaugeError('Sensor can only be between 1 and 6. You choose ' + str(sensor))
reading = self.send('PR%d' % sensor, 1) ## reading will have the form x,x.xxxEsx <CR><LF> (see p.88) 82 82 reading = self.send('PR%d' % sensor, 1) ## reading will have the form x,x.xxxEsx <CR><LF> (see p.88)
try: 83 83 try:
r = reading[0].split(',') 84 84 r = reading[0].split(',')
status = int(r[0]) 85 85 status = int(r[0])
pressure = float(r[-1]) 86 86 pressure = float(r[-1])
except: 87 87 except:
raise MaxiGaugeError("Problem interpreting the returned line:\n%s" % reading) 88 88 raise MaxiGaugeError("Problem interpreting the returned line:\n%s" % reading)
return PressureReading(sensor, status, pressure) 89 89 return PressureReading(sensor, status, pressure)
90 90
def debugMessage(self, message): 91 91 def debugMessage(self, message):
if self.debug: print(repr(message)) 92 92 if self.debug: print(repr(message))
93 93
def send(self, mnemonic, numEnquiries = 0): 94 94 def send(self, mnemonic, numEnquiries = 0):
self.connection.flushInput() 95 95 self.connection.flushInput()
self.write(mnemonic+LINE_TERMINATION) 96 96 self.write(mnemonic+LINE_TERMINATION)
#if mnemonic != C['ETX']: self.read() 97 97 #if mnemonic != C['ETX']: self.read()
#self.read() 98 98 #self.read()
self.getACQorNAK() 99 99 self.getACQorNAK()
response = [] 100 100 response = []
for i in range(numEnquiries): 101 101 for i in range(numEnquiries):
self.enquire() 102 102 self.enquire()
response.append(self.read()) 103 103 response.append(self.read())
return response 104 104 return response
105 105
def write(self,what): 106 106 def write(self,what):
self.debugMessage(what) 107 107 self.debugMessage(what)
self.connection.write(what) 108 108 self.connection.write(what)
109 109
def enquire(self): 110 110 def enquire(self):
self.write(C['ENQ']) 111 111 self.write(C['ENQ'])
112 112
def read(self): 113 113 def read(self):
data = "" 114 114 data = ""
while True: 115 115 while True:
x = self.connection.read() 116 116 x = self.connection.read()
self.debugMessage(x) 117 117 self.debugMessage(x)
data += x 118 118 data += x
if len(data)>1 and data[-2:]==LINE_TERMINATION: 119 119 if len(data)>1 and data[-2:]==LINE_TERMINATION:
break 120 120 break
return data[:-len(LINE_TERMINATION)] 121 121 return data[:-len(LINE_TERMINATION)]
122 122
def getACQorNAK(self): 123 123 def getACQorNAK(self):
returncode = self.connection.readline() 124 124 returncode = self.connection.readline()
self.debugMessage(returncode) 125 125 self.debugMessage(returncode)
## The following is usually expected but our MaxiGauge controller sometimes forgets this parameter... That seems to be a bug with the DCC command. 126 126 ## The following is usually expected but our MaxiGauge controller sometimes forgets this parameter... That seems to be a bug with the DCC command.
#if len(returncode)<3: raise MaxiGaugeError('Only received a line termination from MaxiGauge. Was expecting ACQ or NAK.') 127 127 #if len(returncode)<3: raise MaxiGaugeError('Only received a line termination from MaxiGauge. Was expecting ACQ or NAK.')
if len(returncode)<3: self.debugMessage('Only received a line termination from MaxiGauge. Was expecting ACQ or NAK.') 128 128 if len(returncode)<3: self.debugMessage('Only received a line termination from MaxiGauge. Was expecting ACQ or NAK.')
if len(returncode)>2 and returncode[-3] == C['NAK']: 129 129 if len(returncode)>2 and returncode[-3] == C['NAK']:
self.enquire() 130 130 self.enquire()
returnedError = self.read() 131 131 returnedError = self.read()
error = str(returnedError).split(',' , 1) 132 132 error = str(returnedError).split(',' , 1)
print repr(error) 133 133 print repr(error)
errmsg = { 'System Error': ERR_CODES[0][int(error[0])] , 'Gauge Error': ERR_CODES[1][int(error[1])] } 134 134 errmsg = { 'System Error': ERR_CODES[0][int(error[0])] , 'Gauge Error': ERR_CODES[1][int(error[1])] }
raise MaxiGaugeNAK(errmsg) 135 135 raise MaxiGaugeNAK(errmsg)
#if len(returncode)>2 and returncode[-3] != C['ACQ']: raise MaxiGaugeError('Expecting ACQ or NAK from MaxiGauge but neither were sent.') 136 136 #if len(returncode)>2 and returncode[-3] != C['ACQ']: raise MaxiGaugeError('Expecting ACQ or NAK from MaxiGauge but neither were sent.')
if len(returncode)>2 and returncode[-3] != C['ACQ']: self.debugMessage('Expecting ACQ or NAK from MaxiGauge but neither were sent.') 137 137 if len(returncode)>2 and returncode[-3] != C['ACQ']: self.debugMessage('Expecting ACQ or NAK from MaxiGauge but neither were sent.')
# if no exception raised so far, the interface is just fine: 138 138 # if no exception raised so far, the interface is just fine:
return returncode[:-(len(LINE_TERMINATION)+1)] 139 139 return returncode[:-(len(LINE_TERMINATION)+1)]
140 140
def disconnect(self): 141 141 def disconnect(self):
#self.send(C['ETX']) 142 142 #self.send(C['ETX'])
if hasattr(self, 'connection') and self.connection: self.connection.close() 143 143 if hasattr(self, 'connection') and self.connection: self.connection.close()
144 144
def __del__(self): 145 145 def __del__(self):
self.disconnect() 146 146 self.disconnect()
147 147
class PressureReading(object): 148 148 class PressureReading(object):
def __init__(self, id, status, pressure): 149 149 def __init__(self, id, status, pressure):
if int(id) not in range(1,7): raise MaxiGaugeError('Pressure Gauge ID must be between 1-6') 150 150 if int(id) not in range(1,7): raise MaxiGaugeError('Pressure Gauge ID must be between 1-6')
self.id = int(id) 151 151 self.id = int(id)
if int(status) not in PRESSURE_READING_STATUS.keys(): raise MaxiGaugeError('The Pressure Status must be in the range %s' % PRESSURE_READING_STATUS.keys()) 152 152 if int(status) not in PRESSURE_READING_STATUS.keys(): raise MaxiGaugeError('The Pressure Status must be in the range %s' % PRESSURE_READING_STATUS.keys())
self.status = int(status) 153 153 self.status = int(status)
self.pressure = float(pressure) 154 154 self.pressure = float(pressure)
155 155
def statusMsg(self): 156 156 def statusMsg(self):
return PRESSURE_READING_STATUS[self.status] 157 157 return PRESSURE_READING_STATUS[self.status]
158 158
def __repr__(self): 159 159 def __repr__(self):
return "Gauge #%d: Status %d (%s), Pressure: %f mbar\n" % (self.id, self.status, self.statusMsg(), self.pressure) 160 160 return "Gauge #%d: Status %d (%s), Pressure: %f mbar\n" % (self.id, self.status, self.statusMsg(), self.pressure)
161 161
162 162
### ------ now we define the exceptions that could occur ------ 163 163 ### ------ now we define the exceptions that could occur ------
164 164
class MaxiGaugeError(Exception): 165 165 class MaxiGaugeError(Exception):
pass 166 166 pass
167 167
class MaxiGaugeNAK(MaxiGaugeError): 168 168 class MaxiGaugeNAK(MaxiGaugeError):
pass 169 169 pass
170 170
### ------- Control Symbols as defined on p. 81 of the english 171 171 ### ------- Control Symbols as defined on p. 81 of the english
### manual for the Pfeiffer Vacuum TPG256A ----------- 172 172 ### manual for the Pfeiffer Vacuum TPG256A -----------
C = { 173 173 C = {
'ETX': "\x03", # End of Text (Ctrl-C) Reset the interface 174 174 'ETX': "\x03", # End of Text (Ctrl-C) Reset the interface
'CR': "\x0D", # Carriage Return Go to the beginning of line 175 175 'CR': "\x0D", # Carriage Return Go to the beginning of line
'LF': "\x0A", # Line Feed Advance by one line 176 176 'LF': "\x0A", # Line Feed Advance by one line
'ENQ': "\x05", # Enquiry Request for data transmission 177 177 'ENQ': "\x05", # Enquiry Request for data transmission
'ACQ': "\x06", # Acknowledge Positive report signal 178 178 'ACQ': "\x06", # Acknowledge Positive report signal
'NAK': "\x15", # Negative Acknowledge Negative report signal 179 179 'NAK': "\x15", # Negative Acknowledge Negative report signal
'ESC': "\x1b", # Escape 180 180 'ESC': "\x1b", # Escape
} 181 181 }
182 182
LINE_TERMINATION=C['CR']+C['LF'] # CR, LF and CRLF are all possible (p.82) 183 183 LINE_TERMINATION=C['CR']+C['LF'] # CR, LF and CRLF are all possible (p.82)
184 184
### Mnemonics as defined on p. 85 185 185 ### Mnemonics as defined on p. 85
M = [ 186 186 M = [
'BAU', # Baud rate Baud rate 95 187 187 'BAU', # Baud rate Baud rate 95
'CAx', # Calibration factor Sensor x Calibration factor sensor x (1 ... 6) 92 188 188 'CAx', # Calibration factor Sensor x Calibration factor sensor x (1 ... 6) 92
'CID', # Measurement point names Measurement point names 88 189 189 'CID', # Measurement point names Measurement point names 88
'DCB', # Display control Bargraph Bargraph 89 190 190 'DCB', # Display control Bargraph Bargraph 89
'DCC', # Display control Contrast Display control contrast 90 191 191 'DCC', # Display control Contrast Display control contrast 90
'DCD', # Display control Digits Display digits 88 192 192 'DCD', # Display control Digits Display digits 88
'DCS', # Display control Screensave Display control screensave 90 193 193 'DCS', # Display control Screensave Display control screensave 90
'DGS', # Degas Degas 93 194 194 'DGS', # Degas Degas 93
'ERR', # Error Status Error status 97 195 195 'ERR', # Error Status Error status 97
'FIL', # Filter time constant Filter time constant 92 196 196 'FIL', # Filter time constant Filter time constant 92
'FSR', # Full scale range of linear sensors Full scale range of linear sensors 93 197 197 'FSR', # Full scale range of linear sensors Full scale range of linear sensors 93
'LOC', # Parameter setup lock Parameter setup lock 91 198 198 'LOC', # Parameter setup lock Parameter setup lock 91
'NAD', # Node (device) address for RS485 Node (device) address for RS485 96 199 199 'NAD', # Node (device) address for RS485 Node (device) address for RS485 96
'OFC', # Offset correction Offset correction 93 200 200 'OFC', # Offset correction Offset correction 93
'OFC', # Offset correction Offset correction 93 201 201 'OFC', # Offset correction Offset correction 93
'PNR', # Program number Program number 98 202 202 'PNR', # Program number Program number 98
'PRx', # Status, Pressure sensor x (1 ... 6) Status, Pressure sensor x (1 ... 6) 88 203 203 'PRx', # Status, Pressure sensor x (1 ... 6) Status, Pressure sensor x (1 ... 6) 88
'PUC', # Underrange Ctrl Underrange control 91 204 204 'PUC', # Underrange Ctrl Underrange control 91
'RSX', # Interface Interface 94 205 205 'RSX', # Interface Interface 94
'SAV', # Save default Save default 94 206 206 'SAV', # Save default Save default 94
'SCx', # Sensor control Sensor control 87 207 207 'SCx', # Sensor control Sensor control 87
'SEN', # Sensor on/off Sensor on/off 86 208 208 'SEN', # Sensor on/off Sensor on/off 86
'SPx', # Set Point Control Source for Relay xThreshold value setting, Allocation 90 209 209 'SPx', # Set Point Control Source for Relay xThreshold value setting, Allocation 90
'SPS', # Set Point Status A,B,C,D,E,F Set point status 91 210 210 'SPS', # Set Point Status A,B,C,D,E,F Set point status 91
'TAI', # Test program A/D Identify Test A/D converter identification inputs 100 211 211 'TAI', # Test program A/D Identify Test A/D converter identification inputs 100
'TAS', # Test program A/D Sensor Test A/D converter measurement value inputs 100 212 212 'TAS', # Test program A/D Sensor Test A/D converter measurement value inputs 100
'TDI', # Display test Display test 98 213 213 'TDI', # Display test Display test 98
'TEE', # EEPROM test EEPROM test 100 214 214 'TEE', # EEPROM test EEPROM test 100
'TEP', # EPROM test EPROM test 99 215 215 'TEP', # EPROM test EPROM test 99
'TID', # Sensor identification Sensor identification 101 216 216 'TID', # Sensor identification Sensor identification 101
'TKB', # Keyboard test Keyboard test 99 217 217 'TKB', # Keyboard test Keyboard test 99
'TRA', # RAM test RAM test 99 218 218 'TRA', # RAM test RAM test 99
'UNI', # Unit of measurement (Display) Unit of measurement (pressure) 89 219 219 'UNI', # Unit of measurement (Display) Unit of measurement (pressure) 89
'WDT', # Watchdog and System Error Control Watchdog and system error control 101 220 220 'WDT', # Watchdog and System Error Control Watchdog and system error control 101
] 221 221 ]
222 222
223 223
### Error codes as defined on p. 97 224 224 ### Error codes as defined on p. 97
ERR_CODES = [ 225 225 ERR_CODES = [
{ 226 226 {
0: 'No error', 227 227 0: 'No error',
1: 'Watchdog has responded', 228 228 1: 'Watchdog has responded',