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FNISR1013D-JSON.py
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FNISR1013D-JSON.py
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#!/usr/bin/python
# FNISR1013D-JSON.py
# transforms wav waveform captures from FNISR1013D scope to Json
#
# Author : Bob Tidey
# Date : 30/09/2020
import time
import array
import json
# -----------------------
# Main Script
# -----------------------
# set json_indent to None for smallest file
json_indent = 1
voltList = [[5.0,"V",1],[2.5,"V",1],[1.0,"V",1],[500,"mV",0.001],[200,"mV",0.001],[100,"mV",0.001],[50,"mV",0.001]]
timeList = [[50,"S",1],[20,"S",1],[10,"S",1],[5,"S",1],[2,"S",1],[1,"S",1],[500,"mS",.001],[200,"mS",.001],[100,"mS",.001],[50,"mS",.001],[20,"mS",.001],[10,"mS",.001],[5,"mS",.001],[2,"mS",.001],[1,"mS",.001],[500,"uS",1E-6],[200,"uS",1E-6],[100,"uS",1E-6],[50,"uS",1E-6],[20,"uS",1E-6],[10,"uS",1E-6],[5,"uS",1E-6],[2,"uS",1E-6],[1,"uS",1E-6],[500,"nS",1E-9],[200,"nS",1E-9],[100,"nS",1E-9],[50,"nS",1E-9],[20,"nS",1E-9],[10,"nS",1E-9]]
measureList = ["Vmax","Vmin","Vavg","Vrms","Vpp","Vp","Freq","Cycle","Time+","Time-","Duty+","Duty-"]
header = [bytes(208)]
measures = [bytes(48), bytes(48)]
dataBuff = [bytes(3000), bytes(3000)]
dataScreen = [bytes(1500), bytes(1500)]
voltScale = [[5.0,"V",1],[2.5,"V",1]]
voltProbe = [1,1]
voltCoupling = ["DC","DC"]
timeScale = [50,"S",1.0]
jsObj = {
"voltage": {"volts":[50,50], "units":["mV/div","mv/div"], "multiplier":[0.001,0.001], "probe":[1,1], "coupling":["DC","DC"]},
"timebase": {"time":50, "units":"mS/div", "multiplier": 0.001},
"trigger": {"channel":0,"edge":0,"type":0},
"settings": {"screenBright":0,"gridBright":0,"scroll":0,"trig50":0},
"measures": {"Vmax":[0,0], "Vmin":[0,0], "Vavg":[0,0], "Vrms":[0,0], "Vpp":[0,0], "Vp":[0,0], "Freq":[0,0], "Cycle":[0,0], "Time+":[0,0], "Time-":[0,0], "Duty+":[0,0], "Duty-":[0,0]},
"dataBuffer": [
{"channel" :"CH1", "units":"mV", "values" : [0 for i in range(1500)]},
{"channel" :"CH2", "units":"mV", "values" : [0 for i in range(1500)]},
],
"dataScreen": [
{"channel" :"CH1", "units":"mV", "values" : [0 for i in range(750)]},
{"channel" :"CH2", "units":"mV", "values" : [0 for i in range(750)]},
],
}
def getBinaryData(filename):
f = open(filename, "rb")
f.seek(0)
header[0] = f.read(208)
f.seek(208)
measures[0] = f.read(48)
f.seek(256)
measures[1] = f.read(48)
f.seek(1000)
dataBuff[0] = f.read(3000)
f.seek(4000)
dataBuff[1] = f.read(3000)
f.seek(7000)
dataScreen[0] = f.read(1500)
f.seek(8500)
dataScreen[1] = f.read(1500)
f.close()
def saveAsJson(filename, ctl):
f =open(filename, "w")
f.write(json.dumps(jsObj, indent=ctl))
f.close()
def parseHeader():
for x in range(2):
voltScale[x] = voltList[header[0][4 + x*10]]
voltProbe[x] = [1,10,100][header[0][10 + x*10]]
voltCoupling[x] = ["DC", "AC"][header[0][8 + x*10]]
jsObj["voltage"]["volts"][x] = voltScale[x][0]
jsObj["voltage"]["units"][x] = voltScale[x][1]
jsObj["voltage"]["multiplier"][x] = voltScale[x][2]
jsObj["voltage"]["probe"][x] = voltProbe[x]
jsObj["voltage"]["coupling"][x] = voltScale[x]
timeScale = timeList[header[0][22]]
jsObj["timebase"]["time"] = timeScale[0]
jsObj["timebase"]["units"] = timeScale[1]
jsObj["timebase"]["multiplier"] = timeScale[2]
jsObj["trigger"]["channel"] = ["CH1","CH2"][header[0][30]]
jsObj["trigger"]["edge"] = ["rising","falling"][header[0][28]]
jsObj["trigger"]["type"] = ["auto","single","normal"][header[0][26]]
jsObj["settings"]["screenBright"] = [header[0][120]]
jsObj["settings"]["gridBright"] = [header[0][122]]
jsObj["settings"]["scroll"] = ["fast","slow"][header[0][24]]
jsObj["settings"]["trig50"] = ["Off","On"][header[0][124]]
def getMeasure(ch,mIndex):
ad = mIndex * 4
mt = measures[ch][ad]
if mIndex < 6:
#voltages
mv = '{0:.3f}'.format((measures[ch][ad+3] * 256 + measures[ch][ad+2]) / 1024)
elif mIndex == 6:
#frequency
mv = measures[ch][ad+3] * 256 + measures[ch][ad+2]
elif mIndex < 10:
#cycle and time
mv = measures[ch][ad+3] * 256 + measures[ch][ad+2]
else:
#Duty
mv = measures[ch][ad+3] * 256 + measures[ch][ad+2]
return str(mv)
def parseMeasures():
for x in range(2):
for y in range(12):
jsObj["measures"][measureList[y]][x] = getMeasure(x,y)
def parseData():
for x in range(2):
jsObj["dataBuffer"][x]["units"] = voltScale[x][1]
for y in range(0,1500):
jsObj["dataBuffer"][x]["values"][y] = (dataBuff[x][y*2] + 256 * dataBuff[x][y*2+1] - 200) * voltScale[x][0] / 50
jsObj["dataScreen"][x]["units"] = voltScale[x][1]
for y in range(0,750):
jsObj["dataScreen"][x]["values"][y] = dataScreen[x][y*2] + 256 * dataBuff[x][y*2+1]
# Main routine
filename = input('filename:')
#if filename.isnumeric():
# filename = str(filename)
getBinaryData(filename + '.wav')
parseHeader()
parseMeasures()
parseData()
saveAsJson(filename + '.json', json_indent)
print("finished")