import pycanum.main as pycan
import numpy
from matplotlib.pyplot import *
import scipy.signal

def spectre(t,u):
    N=len(u)
    te=t[1]-t[0]
    zeros=numpy.zeros(6*N)
    U = numpy.concatenate((u*scipy.signal.blackman(N),zeros))
    NN=len(U)
    spectre = numpy.absolute(numpy.fft.fft(U))*2.0/N/0.42
    freq = numpy.arange(NN)*1.0/(NN*te)
    return (freq,spectre)

fe=40000.0
T=1.0
te=1.0/fe
N = int(T/te)
can = pycan.Sysam("SP5")
can.config_entrees([0],[5.0])
can.config_echantillon(te*10**6,N)
can.acquerir()
t0=can.temps()[0]
u0=can.entrees()[0]
can.fermer()