time = numpy.arange(-300.0/50*timescale, 300.0/50*timescale, timescale/50.0)
# If we generated too many points due to overflow, crop the length of time.
if (time.size > data.size):
time = time[0:600:1]
# See if we should use a different time axis
if (time[599] < 1e-3):
time = time * 1e6
tUnit = "uS"
elif (time[599] < 1):
time = time * 1e3
tUnit = "mS"
else:
tUnit = "S"
# Start data acquisition again, and put the scope back in local mode
test.write(":RUN")
test.write(":KEY:FORC")
test.close()
# Plot the data
plot.plot(time, data)
plot.title("Oscilloscope Channel 1")
plot.ylabel("Voltage (V)")
plot.xlabel("Time (" + tUnit + ")")
plot.xlim(time[0], time[599])
plot.show()
# PyUSBtmc
# get_data.py
#
# Copyright (c) 2011 Mike Hadmack
# This code is distributed under the MIT license
import numpy
import sys
from matplotlib import pyplot
from pyusbtmc import RigolScope
""" Capture data from Rigol oscilloscope and write to a file
usage: python save_channel.py <filename>
if filename is not given STDOUT will be used"""
try:
filename = sys.argv[1]
except:
filename = ""
if filename == "--help":
print """Usage: 1%s [filename]\n Reads both traces from oscilloscope and writes as ASCII tabular data to filename. If no filename is given the program outputs to STDOUT. STDOUT can be directed into a file or piped into another application. For example:\n 1%s myfile\n 1%s > myfile\n 1%s | ./plot_data.py""" % sys.argv[
0
]
sys.exit(1)
print filename
scope = RigolScope("/dev/usbtmc0")
scope.grabData()
scope.writeWaveformToFile(filename)
scope.close()
