def graceful_shutdown(signal, frame):
logger.info('Got a shutdown signal!')
if connection:
connection.close()
if csv_file:
csv_file.close()
ads1256.stop()
sys.exit(0)
def ReadValues():
rate = 25 # Frequency in Hz
ads1256.start("1", str(rate))
pub = rospy.Publisher('/sen_4/ResVal',
Float32,
tcp_nodelay=False,
queue_size=1)
rospy.init_node('Rheostat', anonymous=True)
rate = rospy.Rate(10)
while not rospy.is_shutdown():
absoluteValue = ads1256.read_channel(0)
voltage = ((absoluteValue * 100) / 167.0) / 1000000.0
rospy.loginfo(voltage)
pub.publish(voltage)
rate.sleep()
ads1256.stop()
def PWM_Voltage_Measure(Measurement):
gain = 1 # ADC's Gain parameter
sps = 25 # ADC's SPS parameter
ads1256.start(str(gain), str(sps))
if Measurement == 'DC_Link':
ChannelValue = ads1256.read_channel(3)
ChannelValueVolts = ((
(ChannelValue * 100) / 167.0) / int(gain)) / 1000000.0
DCVolts = ChannelValueVolts
elif Measuremnet == 'Solar':
ChannelValue = ads1256.read_channel(3)
ChannelValueVolts = ((
(ChannelValue * 100) / 167.0) / int(gain)) / 1000000.0
DCVolts = ChannelValueVolts
else:
UPS_Error('Error_Voltage_Measurement')
ads1256.stop()
return DCVolts
ads1256.start("1", "2d5")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((TCP_IP, TCP_PORT))
s.listen(1)
print "Wait for client..."
#Wait for a connection
conn, addr = s.accept()
print 'Connection address:', addr
while 1:
outBin = ""
for i in range(TCP_PACK_SIZE):
t1 = datetime.datetime.now()
data = ads1256.read_all_channels()
t3 = datetime.datetime.now()
print "%s " % (t3 - t1)
if data[2] == 0 or data[3] == 0:
print "ZERO %s %s" % (data[2], data[3])
#Append data to the outgoing message
outBin = outBin + struct.pack('!ii', data[2], data[3])
#Send aggregated data
conn.send(outBin)
ads1256.stop()
conn.close()
def __del__(self):
ads1256.stop()
self.stopLoop = True
print "Destroying sensor"
return voltage
adc.start("1", "2d5")
signal.signal(signal.SIGINT, signal_handler)
interupted = False
dataLog = open("dcf_datalog.txt", "w")
dataLog.write("%5s %5s"%("Time", "Volts\n"))
print "DCF Survival Test"
print "Start time: ", dt.datetime.now().strftime('%Y-%m-%d - %H:%M:%S')
print "Press CTRL-C to exit safely"
count = 0
while True:
dataLine = (dt.datetime.now().strftime('%Y-%m-%d - %H:%M:%S'), readADC_volts(channel = 7))
dataLog.write("%s %s \n"%dataLine)
count+=1
sys.stdout.write("\r" + "Measurement Number: " + str(count))
sys.stdout.flush()
if interupted:
print "\n Closing"
break
sleep(5)
dataLog.close()
adc.stop()
def ReadValues():
while not rospy.is_shutdown():
Loop(ads1256.read_channel(adcChannel))
rate.sleep()
ads1256.stop()
def ReadValues():
while True:
Loop(ads1256.read_channel(adcChannel))
time.sleep(1 / readFrequency / 2)
ads1256.stop()
def __del__(self):
ads1256.stop()