def __getLOFreq(self):
rightBit = ljm.eReadName(self.handle, "EIO3")
leftBit = ljm.eReadName(self.handle, "EIO4")
setting = leftBit * 2 + rightBit
freqName = self.LOConstantNames[setting]
return freqName, setting
def __getitem__(self,chan):
"""
Allows reading of an input chan by calling lj[chan]
"""
# Apply offsets and stuff if this is a channel we know
try:
return time(),ljm.eReadName(
self.handle,self.in_chan_dict[chan]['to_read'])
# Else: let the user access it directly
except KeyError:
return time(),ljm.eReadName(self.handle,chan)
def open(self):
self.handle = ljm.openS(self.device,self.connection,self.identifier)
names,values = [],[]
for c in self.chan_list:
if "to_write" in c:
for n,v in c['to_write']:
names.append(c['name']+n)
values.append(v)
#names.append("STREAM_NUM_ADDRESSES");values.append(len(self.channels))
names.append("STREAM_SCANRATE_HZ");values.append(self.scan_rate)
names.append("STREAM_RESOLUTION_INDEX");values.append(self.resolution)
ljm.eWriteNames(self.handle,len(names),names,values)
scan_rate = ljm.eReadName(self.handle,"STREAM_SCANRATE_HZ")
if scan_rate != self.scan_rate:
print("[Labjack] Actual scan_rate:",scan_rate,"instead of",self.scan_rate)
self.scan_rate = scan_rate
if any([c.get("make_zero",False) for c in self.chan_list]):
print("[Labjack] Please wait during offset evaluation...")
off = self.eval_offset()
names,values = [],[]
for i,c in enumerate(self.chan_list):
if 'make_zero' in c and c['make_zero']:
c['offset'] += c['gain']*off[i]
self.n = 0 # Number of data points (to rebuild time)
def __getHIPow(self):
pow = ljm.eReadName(self.handle, "AIN2")
pow = 24 - 40 * pow
return pow
def __getHNoiseSel(self):
sel = ljm.eReadName(self.handle, "EIO1")
return sel
def Digital_Ports_Read(handle,Port):
return ljm.eReadName(handle, Port)
def _query(self, register):
''' Reads the specified register. '''
return ljm.eReadName(self.handle, register)
def __getHIPow(self):
pow = ljm.eReadName(self.handle, "AIN2")
pow = 24 - 40 * pow + AntennaLJ.pow_offset
return pow
from labjack import ljm
# Open first found LabJack
handle = ljm.open(ljm.constants.dtANY, ljm.constants.ctANY, "ANY")
#handle = ljm.openS("ANY", "ANY", "ANY")
info = ljm.getHandleInfo(handle)
print("Opened a LabJack with Device type: %i, Connection type: %i,\n" \
"Serial number: %i, IP address: %s, Port: %i,\nMax bytes per MB: %i" % \
(info[0], info[1], info[2], ljm.numberToIP(info[3]), info[4], info[5]))
# Setup and call eWriteNames to configure the AIN on the LabJack.
numFrames = 3
names = ["AIN0_NEGATIVE_CH", "AIN0_RANGE", "AIN0_RESOLUTION_INDEX"]
aValues = [199, 10, 0]
ljm.eWriteNames(handle, numFrames, names, aValues)
print("\nSet configuration:")
for i in range(numFrames):
print(" %s : %f" % (names[i], aValues[i]))
# Setup and call eReadName to read an AIN from the LabJack.
name = "AIN0"
result = ljm.eReadName(handle, name)
print("\n%s reading : %f V" % (name, result))
# Close handle
ljm.close(handle)
def __get24V(self):
volt = ljm.eReadName(self.handle, "AIN4") * 3
return volt
def lifeSensorSample(self):
global motorEnable, lifeTestMotorDirection, motorEnabled, lifeTestActive
lifeTestActive = True
actionFlag = False
actionTaken = False
sessionData = [] # Generate empty list for local session data
cutOffForce = int(self.ui.forceCutOffEdit.text())
while lifeTestActive:
timeStamp = datetime.datetime.now().strftime("%H:%M:%S")
V1 = ljm.eReadName(handle,
pressureVoltage) # Sample analog pressure input
LV1 = ljm.eReadName(handle,
loadVoltage) # Sample analog load cell input
P1 = 61.121 * V1 - 43.622
load = LV1 * 1 #UPDATE NEEDED TO LOAD CELL
prox1Low = ljm.eReadName(handle,
px1Low) #read proximity sensor low
prox1High = ljm.eReadName(handle,
px1High) #read proximity sensor low
#sessionData.append(self.sampleSensorData()) # sample data and write to session list
#self.plotSessionData2(sessionData)
print("Action Flag: " + str(actionFlag))
print("Prox Val: " + str(prox1High))
# Check first proximity sensor
if prox1High > 3 and not actionTaken:
print("Prox1 flagged, motor stopped)")
self.ui.proxLifeRadio1.setStyleSheet(redProxStyle)
motorEnabled = False #shut down motor
motorEnable = 5 #shut down motor
ljm.eWriteName(handle, "DAC" + str(motorEnablePin),
motorEnable) # 5V high to disable motor
ljm.eWriteName(handle, "DIO" + str(motorPWM) + "_EF_ENABLE",
0) # Disable the EF system
#start timer to give a stop delay
print("five second dwell....")
time.sleep(5)
print("toggling motor direction")
self.lifeCycleToggle() #Toggle the motor direction and RPM
print("New Motor Direction: " + str(lifeTestMotorDirection))
print("")
actionTaken = True #action has been taken based off of sensor flag
motorEnabled = True #set indicator to true
motorEnable = 0 #set global variable to allow motor to be durned on
ljm.eWriteName(handle, "DAC" + str(motorEnablePin),
motorEnable) # Ov low to enable motor
self.ui.proxLifeRadio1.setStyleSheet(yellowProxStyle)
elif prox1High > 3 and actionTaken: #condition where sensor is still flagging but action has been taken
timeVal = 0
timeout = 10
print("Timeout starting for " + str(timeout) + " seconds")
time.sleep(timeout)
prox1High = ljm.eReadName(handle, px1High)
if prox1High > 3: #see if sensor resets, if not, shut it down
print("No sensor reset, shutting down permanently)")
motorEnable = 5 # shut down motor
ljm.eWriteName(handle, "DAC" + str(motorEnablePin),
motorEnable) # 5V high to disable motor
ljm.eWriteName(handle,
"DIO" + str(motorPWM) + "_EF_ENABLE",
0) # Disable the EF system
lifeTestActive = False
while True:
self.ui.proxLifeRadio1.setStyleSheet(yellowProxStyle)
time.sleep(.25)
self.ui.proxLifeRadio1.setStyleSheet(redProxStyle)
time.sleep(.25)
else: #sensor reset, all clear
actionTaken = False
self.ui.proxLifeRadio1.setStyleSheet(greenProxStyle)
elif prox1High < 3:
self.ui.proxLifeRadio1.setStyleSheet(greenProxStyle)
actionTaken = False
#check load cell
# if load >= cutOffForce:
# print("Max Load Exceeded")
# self.lifeTestSuspend()
# print("Suspending life cycle test")
# motorEnabled = False
# lifeTestActive = False
# motorEnable = 5
# ljm.eWriteName(handle, "DAC" + str(motorEnablePin), motorEnable) # 0V high to disable
# ljm.eWriteName(handle, "DIO" + str(motorPWM) + "_EF_ENABLE", 0) # Disable the EF system
print("Life Test Running")
self.ui.pressureLifeLCD.display(P1) # display data on GUI
self.ui.loadLifeLCD.display(load)
time.sleep(0.1)
handle, "I2C_SLAVE_ADDRESS", 40
) # Slave Address of the I2C chip = 40 (0x28)
# Initial read of 4 bytes. We need a single I2C
# transmission that the sensor docs apparently say should happen from master?
ljm.eWriteName(handle, "I2C_NUM_BYTES_TX", 1) # Set the number of bytes to transmit
ljm.eWriteName(handle, "I2C_NUM_BYTES_RX", 4) # Set the number of bytes to receive
# Set the TX bytes. We are sending 1 byte for the address.
numBytes = 1
aBytes = [1] # Byte 0: Memory pointer = 0
ljm.eWriteNameByteArray(handle, "I2C_DATA_TX", numBytes, aBytes)
ljm.eWriteName(handle, "I2C_GO", 1) # Do the I2C communications.
ack = ljm.eReadName(handle, "I2C_ACKS")
print("Ack %i\n" % ack)
# Read the RX bytes.
numBytes = 4
# aBytes[0] to aBytes[3] will contain the data
aBytes = [0] * 4
aBytes = ljm.eReadNameByteArray(handle, "I2C_DATA_RX", numBytes)
print("\nRead User Memory [0-3] = %s" % " ".join([("%.0f" % val) for val in aBytes]))
ack = ljm.eReadName(handle, "I2C_ACKS")
print("Ack %i\n" % ack)
# Close handles
# ljm.cleanInterval(interval_handle)
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_SIZE", 512)
ljm.eWriteName(handle, "STREAM_OUT0_ENABLE", 1)
# Write values to the stream-out buffer
ljm.eWriteName(handle, "STREAM_OUT0_LOOP_SIZE", 6)
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_F32", 0.0) # 0.0 V
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_F32", 1.0) # 1.0 V
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_F32", 2.0) # 2.0 V
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_F32", 3.0) # 3.0 V
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_F32", 4.0) # 4.0 V
ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_F32", 5.0) # 5.0 V
ljm.eWriteName(handle, "STREAM_OUT0_SET_LOOP", 1)
print("STREAM_OUT0_BUFFER_STATUS = %f" %
(ljm.eReadName(handle, "STREAM_OUT0_BUFFER_STATUS")))
# Stream Configuration
POS_IN_NAMES = ["AIN0", "AIN1"]
NUM_IN_CHANNELS = len(POS_IN_NAMES)
TOTAL_NUM_CHANNELS = NUM_IN_CHANNELS + NUM_OUT_CHANNELS
# Add positive channels to scan list
aScanList = ljm.namesToAddresses(NUM_IN_CHANNELS, POS_IN_NAMES)[0]
scanRate = 2000
scansPerRead = 60
# Add the scan list outputs to the end of the scan list.
# STREAM_OUT0 = 4800, STREAM_OUT1 = 4801, etc.
aScanList.extend([4800]) # STREAM_OUT0
minSumSignal = 3.0
sumSignal = []
# analog input to read from the labjack
analogInputName = 'AIN1'
try:
for i in range(len(Bx)):
if i % 2:
for j in range(len(By)):
xyz.field_cart(Bx[i],By[j],xyz.zCoil.largeCoilField) #,handle)
#time.sleep(0.1)
result = float(ljm.eReadName(handle,analogInputName))
if result > minSumSignal:
sumSignal.append([Bx[i],By[j]])
else:
for j in range(len(By)):
xyz.field_cart(Bx[i],By[-(j+1)],xyz.zCoil.largeCoilField) #, handle)
#time.sleep(0.1)
result = float(ljm.eReadName(handle,analogInputName))
if result > minSumSignal:
sumSignal.append([Bx[i],By[-(j+1)]])
except KeyboardInterrupt:
print('\n')
xyz.closePorts(handle)
print('closed all the ports')
import sys
import time
from labjack import ljm
# Open first found LabJack
handle = ljm.open(ljm.constants.dtANY, ljm.constants.ctUSB, "ANY")
#handle = ljm.openS("ANY", "USB", "ANY")
info = ljm.getHandleInfo(handle)
print("Opened a LabJack with Device type: %i, Connection type: %i,\n" \
"Serial number: %i, IP address: %s, Port: %i,\nMax bytes per mb: %i" % \
(info[0], info[1], info[2], ljm.numberToIP(info[3]), info[4], info[5]))
# Ensure that a lua script is running on the T7. If not, end the python script.
if (ljm.eReadName(handle, "LUA_RUN") != 1):
print("There is no Lua script running on the device.")
print("Please use Kipling to begin a Lua script on the device.")
sys.exit()
# Load the calibration consants for the BMP180 from USER_RAM Registers.
calAddrNames = [
"USER_RAM11_F32", "USER_RAM12_F32", "USER_RAM13_F32", "USER_RAM14_F32",
"USER_RAM15_F32", "USER_RAM16_F32", "USER_RAM17_F32", "USER_RAM18_F32",
"USER_RAM19_F32", "USER_RAM20_F32", "USER_RAM21_F32"
]
calConst = ljm.eReadNames(handle, 11, calAddrNames)
ac1 = calConst[0]
ac2 = calConst[1]
ac3 = calConst[2]
"""
Demonstrates reading a single analog input (AIN) from a LabJack.
"""
from labjack import ljm
# Open first found LabJack
handle = ljm.open(ljm.constants.dtANY, ljm.constants.ctANY, "ANY")
#handle = ljm.openS("ANY", "ANY", "ANY")
info = ljm.getHandleInfo(handle)
print("Opened a LabJack with Device type: %i, Connection type: %i,\n" \
"Serial number: %i, IP address: %s, Port: %i,\nMax bytes per MB: %i" % \
(info[0], info[1], info[2], ljm.numberToIP(info[3]), info[4], info[5]))
# Setup and call eReadName to read from a AIN on the LabJack.
name = "AIN0"
result = ljm.eReadName(handle, name)
print("\n%s reading : %f V" % (name, result))
# Close handle
ljm.close(handle)
def __getLJTemp(self):
temp = ljm.eReadName(self.handle, "TEMPERATURE_DEVICE_K")
return temp
def __getS5V(self):
volt = ljm.eReadName(self.handle, "AIN8")
return volt
def __getLJAirTemp(self):
temp = ljm.eReadName(self.handle, "TEMPERATURE_AIR_K")
return temp
def printRegisterValue(handle, register_name):
value = ljm.eReadName(handle, register_name)
print("%s = %f" % (register_name, value))
def __get12V(self):
volt = ljm.eReadName(self.handle, "AIN6") * 2
return volt
##############
steps = 1000
Bx = np.linspace(xAppliedMinField, xAppliedMaxField, 40)
By = np.linspace(yAppliedMinField, yAppliedMaxField, 1000)
Bz = np.linspace(56.0, 62.0, 200)
minSumSignal = 3.0
sumSignal = []
for i in range(len(Bx)):
if i % 2:
for j in range(len(By)):
field_cart(Bx[i],By[j])
#time.sleep(0.1)
result = float(ljm.eReadName(handle,analogInputName))
if result > minSumSignal:
sumSignal.append([Bx[i],By[j]])
else:
for j in range(len(By)):
field_cart(Bx[i],By[-(j+1)])
#time.sleep(0.1)
result = float(ljm.eReadName(handle,analogInputName))
if result > minSumSignal:
sumSignal.append([Bx[i],By[-(j+1)]])
# close the labjack connection
ljm.close(handle)
# close the powersupply conections
def __getSerial(self):
serial = ljm.eReadName(self.handle, "SERIAL_NUMBER")
return serial
def print_register_value(handle, register_name):
value = ljm.eReadName(handle, register_name)
print("%s = %f" % (register_name, value))
def __getHITemp(self):
temp = ljm.eReadName(self.handle, "AIN12")
temp = 478 * temp - 267
return temp
gpios = []
#iterate over all GPIOs
for i in xrange(8):
gpios.append(True)
#just to save copiable code, loop over I/O 0 or 1
for val in xrange(2):
#VERY IMPORTANT always reset LJ to low out to avoid driving LJ and Gumstix simultaneously
DIO = "FIO%i" % i
ljm.eWriteName(lj, DIO, 0)
#configure GPIO to output
ser.write('echo out > /gpio/boardio%i/direction\r' % (i+1))
sleep(1)
ser.write('echo %i > /gpio/boardio%i/value\r' % (val, i+1))
sleep(1)
#read value on LJ
ljread = int(ljm.eReadName(lj, DIO))
print 'LJRead on GPIO %i expecting %i got %i' % (i, val, ljread)
if ljread != val:
gpios[i] = False
ser.write('echo in > /gpio/boardio%i/direction\r' % (i+1))
#configure LJ to output
ljm.eWriteName(lj, DIO, val)
sleep(1)
#read value on gumstix
ser.write('cat /gpio/boardio%i/value\r' % (i+1))
gtread = gt.expect(ser, ['0', '1'], 5)
print 'GTRead on GPIO %i expecting %i got %i' % (i, val, gtread)
if gtread != val:
gpios[i] = False
#pass if all passed
success = True
(info[0], info[1], info[2], ljm.numberToIP(info[3]), info[4], info[5]))
# Configure the PWM output and counter.
aNames = ["DIO_EF_CLOCK0_DIVISOR", "DIO_EF_CLOCK0_ROLL_VALUE",
"DIO_EF_CLOCK0_ENABLE", "DIO0_EF_INDEX",
"DIO0_EF_VALUE_A", "DIO0_EF_ENABLE",
"DIO18_EF_INDEX", "DIO18_EF_ENABLE"]
aValues = [1, 8000,
1, 0,
2000, 1,
7, 1]
numFrames = len(aNames)
results = ljm.eWriteNames(handle, numFrames, aNames, aValues)
# Wait 1 second.
time.sleep(1.0)
# Read from the counter.
value = ljm.eReadName(handle, "DIO18_EF_READ_A")
print("\nCounter = %f" % (value))
# Turn off PWM output and counter
aNames = ["DIO_EF_CLOCK0_ENABLE", "DIO0_EF_ENABLE"]
aValues = [0, 0]
numFrames = len(aNames)
results = ljm.eWriteNames(handle, numFrames, aNames, aValues)
# Close handle
ljm.close(handle)
def __getNSStatus(self):
status = ljm.eReadName(self.handle, "EIO0")
return status
ljm.eWriteName(handle, "STREAM_OUT2_ENABLE", 1)
# Write values to the stream-out buffer
ljm.eWriteName(handle, "STREAM_OUT2_LOOP_SIZE", 8)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 110)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 100)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 110)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 100)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 110)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 100)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 111)
ljm.eWriteName(handle, "STREAM_OUT2_BUFFER_U16", 100)
# ljm.eWriteName(handle, "STREAM_OUT0_BUFFER_U16", 00)
print("STREAM_OUT0_BUFFER_STATUS = %f" % (ljm.eReadName(handle, "STREAM_OUT0_BUFFER_STATUS")))
# For DAC1
outAddress = ljm.nameToAddress(OUT_NAMES[1])[0]
# Allocate memory for the stream-out buffer
ljm.eWriteName(handle, "STREAM_OUT1_TARGET", outAddress)
ljm.eWriteName(handle, "STREAM_OUT1_BUFFER_SIZE", 512)
ljm.eWriteName(handle, "STREAM_OUT1_ENABLE", 1)
# Write values to the stream-out buffer
ljm.eWriteName(handle, "STREAM_OUT1_LOOP_SIZE", 6)
ljm.eWriteName(handle, "STREAM_OUT1_BUFFER_F32", 0.0) # 0.0 V
ljm.eWriteName(handle, "STREAM_OUT1_BUFFER_F32", 1.0) # 1.0 V
ljm.eWriteName(handle, "STREAM_OUT1_BUFFER_F32", 2.0) # 2.0 V
ljm.eWriteName(handle, "STREAM_OUT1_BUFFER_F32", 3.0) # 3.0 V
DIO_DUTY_CYCLE) # Configure duty cycle to be: 50%
ljm.eWriteName(handle, "DIO0_EF_ENABLE",
1) # Enable the EF system, PWM wave is now being outputted
# Configure EF Channel Registers for digital input check:
ljm.eWriteName(handle, "DIO1_EF_ENABLE", 0)
ljm.eWriteName(handle, "DIO1_EF_INDEX", 5)
ljm.eWriteName(handle, "DIO1_EF_OPTIONS", 0)
ljm.eWriteName(handle, "DIO1_EF_ENABLE", 1)
# Hard code direction high
ljm.eWriteName(handle, "DIO3", 1)
# Test the function and write outputs to terminal
while True:
highTime = ljm.eReadName(handle, "DIO1_EF_READ_A_F")
lowTime = ljm.eReadName(handle, "DIO1_EF_READ_B_F")
#print("High Time (s): " + str(highTime))
#print("Low Time (s(): " + str(lowTime))
total = highTime + lowTime
time.sleep(2)
if total > 0:
recordFreq = 1 / total
duty = (highTime / total) * 100
RPM = 60 * (recordFreq / stepSize)
print("PWM Frequency (Hz): " + str(recordFreq))
print("Duty Cycle (%): " + str(duty))
print("Target RPM: " + str(RPM))
print(" ")
ljm.close(handle)