/usr/share/expeyes/eyes/velocity-sound.py is in expeyes 3.1.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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expEYES program
Author : Ajith Kumar B.P, bpajith@gmail.com
License : GNU GPL version 3
'''
import gettext
gettext.bindtextdomain("expeyes")
gettext.textdomain('expeyes')
_ = gettext.gettext
from Tkinter import *
import expeyes.eyes as eyes, expeyes.eyeplot as eyeplot, expeyes.eyemath as eyemath, time, sys, math
TIMER = 100
WIDTH = 800 # width of drawing canvas
HEIGHT = 400 # height
delay = 10 # Time interval between samples
NP = 200 # Number of samples
data = [] # Of the form, [ [x1,y1], [x2,y2],....] where x and y are vectors
outmask = 1
looping = False
def fset(f):
s = '%5.1f'%f
Freq.delete(0,END)
Freq.insert(0,s)
def update():
global data, looping, NP, delay
data = []
if looping == False:
return
t,v,tt,vv = p.capture01(NP,delay)
for k in range(len(vv)): vv[k] -= 2.5
g.delete_lines()
g.line(t,v)
g.line(tt,vv,1)
data.append([t,v])
data.append([tt,vv])
fa = eyemath.fit_sine(t, v)
if fa != None:
#g.line(t,fa[0], 8)
rms = p.rms(v)
f0 = fa[1][1] * 1000
s = _('Phase = %5.0f deg')%(fa[1][2]*180/math.pi)
else:
s = _('No Signal')
msgwin.config(text=s) # CRO part over
root.after(TIMER, update)
def start():
global looping, NP, delay
if A1.get() == 1:
p.set_upv(5)
f1 = float(Freq.get())
fr = p.set_sqr1(f1)
fset(fr)
looping = True
p.adc2cmp(7)
p.enable_wait_rising(4)
root.after(TIMER, update)
else:
looping = False
p.set_sqr1(0)
def do_fft():
global data, delay, NP
if data == []: return
fr,tr = eyemath.fft(data[0][1], delay * 0.001)
p.save([ [fr,tr] ], 'FFT.dat')
p.grace([ [fr,tr] ], _('freq'), _('power'))
msgwin.config(text = _('Fourier transform Saved to FFT.dat.'))
def save():
global data
s = fn.get()
if s == '':
return
p.save(data, s)
msgwin.config(text = _('Data saved to file ')+s)
def xmgrace(): # Send the data to Xmgrace
global data
p.grace(data, _('milliSeconds'), _('Volts'))
def quit():
p.write_outputs(0)
sys.exit()
p = eyes.open()
p.loadall_calib()
p.set_sqr1(0)
root = Tk()
Canvas(root, width = WIDTH, height = 5).pack(side=TOP) # Some space at the top
g = eyeplot.graph(root, width=WIDTH, height=HEIGHT) # make plot objects using draw.disp
g.setWorld(0,-5, NP * delay * 0.001, 5,_('mS'),_('V'))
if p == None:
g.text(0, 0,_('EYES Hardware Not Found. Check Connections and restart the program'),1)
root.mainloop()
sys.exit()
p.set_voltage(1,5)
cf = Frame(root, width = WIDTH, height = 10)
cf.pack(side=TOP, fill = BOTH, expand = 1)
A1 = IntVar()
cb1 = Checkbutton(cf,text =_('ON/OFF'), command = start, variable=A1, fg = 'blue')
cb1.pack(side=LEFT, anchor = SW)
A1.set(0)
l = Label(cf,text=_('Freq='))
l.pack(side=LEFT, anchor= SW)
Freq = Entry(cf,width = 10, bg = 'white')
Freq.pack(side=LEFT, anchor = SW)
Freq.insert(END,'4000')
b = Button(cf,text =_('Xmgrace'), command=xmgrace)
b.pack(side=LEFT, anchor = SW)
b = Button(cf,text =_('FFT'), command=do_fft)
b.pack(side=LEFT, anchor = SW)
b = Button(cf,text =_('Save to'), command=save)
b.pack(side=LEFT, anchor = SW)
fn = Entry(cf,width = 10, bg = 'white')
fn.pack(side=LEFT, anchor = SW)
fn.insert(END,'sound.dat')
b = Button(cf,text =_('QUIT'), command=quit)
b.pack(side=RIGHT, anchor = SW)
mf = Frame(root) # Message Frame below command frame.
mf.pack(side=TOP, anchor = SW)
msgwin = Label(mf,text = _('Messages'), fg = 'blue')
msgwin.pack(side=LEFT, anchor = SW)
eyeplot.pop_image('pics/sound-vel.png', _('Velocity of Sound'))
root.title(_('EYES: Velocity of Sound'))
root.mainloop()
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