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DSOCapture.py
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DSOCapture.py
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#!C:/prog/python24/python.exe
# --------------------------------------------------
# Python script for Capturing Raw Data on TDS2014B
# Author: Ilias Alexopoulos
# Company: Intralot SA
# Date: 29 Feb 2012
# Version 0.01
# Using PyVisa & ctypes on Python 2.4
# ctypes included in Python 2.5
# --------------------------------------------------
# Version History
# 0.10, 28/02/2012: Initial
# 0.90, 21/06/2013: ??
# 1.00, 07/11/2016: Added SPI Decode
# 1.10, 04/03/2017: Added Licensing and Text
# --------------------------------------------------
# http://192.168.2.19/?COMMAND=:WFMPRe?
#
# capture.py -b RS232 -l TTL -a 115200 -i Capture.csv -n 0
# capture.py -b RS232 -l TTL -a 115200 -i CaptureRS422_LVCMOS.csv -n 0
# capture.py -v -b I2C -i CaptureI2C.csv
# capture.py -v -b SPI -i CaptureSPI.csv -s 0
#
# License conditions are given in LICENSE.TXT
# This code is licnesed under the MIT License
# Copyright (c) 2017 Ilialex Research Lab
# www.ilialex.gr, blog.ilialex.gr
#
#
import re
import os, sys
import time
import getopt
# Diagnostics
import sys
import os
from TWIDecode import *
from RS232Decode import *
from SPIDecode import *
from DSOGetSamples import *
from MyPrint import *
from DataImporter import *
from VCDExporter import *
VersionNum = "1.10"
VersionDate = "2017-04-03"
VersionInfo = """
---------------------------------------------------------------------------------------------------
Script for Capturing RAW data from TDS2014B and decode them
Date: %s, Version: %s
Written by Ilias Alexopoulos\n
Ilialex Research Lab\n
Copyright (c) 2017\n
---------------------------------------------------------------------------------------------------
""" % (VersionDate, VersionNum)
Usageopt = """
usage: %s OPTIONS [-v] [--visa] [-b bus] [-i visa_instr] [-l voltage level] [-f outfile] [-t delay_sec] [-k blank_lines] [-d databits] [-p parity] [-a baud] [-n polarity]
Example: ./%s -v -b I2C -i TCPIP::10.70.130.207::INSTR -f capture.csv -t 3\n
"""
Optionparams = """
Options:
-v : Verbose
-b : Bus selection: I2C,SPI,RS232
-l : Level selection (LVCMOS, LVTTL, CMOS, TTL, RS232, RS422U)
-i : VISA compliant address (ie. TCPIP::10.70.130.207::INSTR) OR filename (ie. capture.csv)
-f : File CSV appended output
-t : Delay for acquisition (initial)
-k : Blank lines to inject at the end of the block, default none
-a : RS232: Baud rate (2400, 19200 etc)
-p : RS232: Parity (N, E, O)
-d : RS232: Data bits (6,7,8)
-n : RS232: Polarity: 0 for positive, 1 for negative (invert)
-s : SPI Phase/Polarity: 0:PolPha[00], 1:PolPha[01], 2:PolPha[10], 3:PolPha[11]
-m : SPI MSB First: 0: LSB First, 1: MSBFirst
--visa: Use NIVISA or TekVISA. Default uses SOCKETs.
---------------------------------------------------------------------------------------------------
"""
def f_Diag():
print(sys.executable)
print(os.getcwd())
print(sys.path)
def f_usage(fname):
global VersionInfo, Optionparams, Usageopt
v = fname.split("\\")
name = v[len(v) - 1]
print(VersionInfo)
print(Usageopt % (name, name))
print(Optionparams)
def f_DisplayI2C(twi, bytes):
line = ""
for b in bytes:
line = "%s, %02X" % (line, b)
if len(bytes) > 1:
i2caddr = bytes[0]
devaddr = i2caddr >> 1
rw = i2caddr & 0x01
labrw = 'RD' if rw else 'WR'
line = "DevAddr: %02X, Operation: %s%s" % (devaddr, labrw, line)
print(line)
else:
print("No START condition detected probably. No Data.")
###################################
# parsing params
###################################
# configuration
gEnable = 0
busfname = ""
levels = 'LVCMOS'
instr = "TCPIP::192.168.2.19::INSTR"
acqdelay = 1
bus = 'I2C'
blanklines = 0
baud = 2400
polarity = 0
parity = 'N'
dbits = 8
sample_period = 964e-9
polpha = 0
msbfirst = 1
logname = 'Capture.csv'
visarsc = '@py'
# Parameters parsing
try:
opts, args = getopt.getopt(sys.argv[1:], "v,b:,i:,f:,t:,k:,d:,l:,a:,p:,n:,s:,m:", ["visa"])
except getopt.GetoptError:
f_usage(sys.argv[0])
sys.exit(1)
for o, a in opts:
# print o, a, opts
if o == '-v':
gEnable = 1
elif o == '-b':
bus = a
elif o == '-l':
levels = a
elif o == '-i':
instr = a
elif o == '-t':
acqdelay = eval(a)
elif o == '-f':
busfname = a
elif o == '-k':
blanklines = eval(a)
elif o == '-a':
baud = eval(a)
elif o == '-n':
polarity = eval(a)
elif o == '-p':
parity = a
elif o == '-d':
dbits = eval(a)
elif o == '-s':
polpha = eval(a)
elif o == '-m':
msbfirst = eval(a)
elif o == 'visa':
visarsc = ''
else: print('**** Warning: unknown option: ', o)
#f_Diag()
MyPrint = MyPrint(gEnable)
MyPrint.f_Print(instr)
MyPrint.f_Print(bus)
MyPrint.f_Print(busfname)
MyPrint.f_Print(levels)
if busfname == "":
busfname = instr
imp = DataImporter(visarsc, busfname, logname, gEnable)
[ch1, ch2] = imp.f_GetSamples()
sample_period = imp.f_GetTBase()
del imp
print("------------------------------------------------------------------------")
if bus == 'I2C':
decode = TWIDecode()
twi, bytes = decode.f_TWIDecode(levels, ch1, ch2)
print(twi)
f_DisplayI2C(twi, bytes)
nch1 = 'SCL'
nch2 = 'SDA'
[vcd, vcdt, vcdd] = decode.f_TWIGetStream()
elif bus == 'SPI':
print("SPI Bus Decode")
decode = SPIDecode()
bytes = decode.f_SPIDecode(levels, ch1, ch2, polpha, msbfirst)
print bytes
nch1 = 'SCLK'
nch2 = 'MISO'
[vcdt, vcdd] = decode.f_SPIGetStream()
elif bus == 'RS232':
print ("RS232 Bus Decode")
decode = RS232Decode()
[dbin, dstat, dascii] = decode.f_RS232Decode(sample_period, levels, baud, dbits, parity, polarity, ch1, ch2)
print (dbin)
print (dascii)
print (dstat)
nch1 = 'Tx'
nch2 = 'Rx'
[vcdt1, vcdd1, vcdt2, vcdd2] = decode.f_RS232GetStream()
else:
print ("Unknown bus: %s" % bus)
nch1 = 'NA'
nch2 = 'NA'
print ("------------------------------------------------------------------------")
myvcd = VCDExporter(logname, nch1, nch2)
if bus == 'I2C':
myvcd.f_SaveVCD_TWI(sample_period, ch1, ch2, vcd, vcdt, vcdd)
elif bus == 'SPI':
myvcd.f_SaveVCD_SPI(sample_period, ch1, ch2, vcdt, vcdd)
pass
elif bus == 'RS232':
print len(vcdt1), len(vcdt2), len(vcdd1), len(vcdd2)
myvcd.f_SaveVCD_RS232(sample_period, ch1, ch2, vcdt1, vcdd1, vcdt2, vcdd2)
pass
else:
pass