Added initial live graph

import matplotlib

from matplotlib.pyplot import *

import pyenergy

from time import sleep

em = pyenergy.EnergyMonitor("EE00")

em.connect()

em.enableMeasurementPoint(1)

em.start(1)

xdata = []

ydata = []

ydata2 = []

ydata3 = []

fig = figure()

ion()

show()

gain = 50

resistor = 1

vref = 3

while True:

    m = em.getInstantaneous(1)

    # m2 = em.getInstantaneous(2)

    # m3 = em.getInstantaneous(3)

    print m, m3

    print m[1] * float(vref)**2 / gain / resistor / 4096**2 * 2

    ydata.append(m[1] * float(vref)**2 / gain / resistor / 4096**2 * 2*1000)

    # ydata2.append(m2[1] * float(vref)**2 / gain / resistor / 4096**2 * 2)

    # ydata3.append(m3[1] * float(vref)**2 / gain / resistor / 4096**2 * 2*1000)

    xdata.append(m[2] / 168000000. * 2)

    # em.debugInstantaneous(m)

    fig.clf()

    ax = fig.add_subplot(111)

    ax.plot(xdata, ydata, '-')

    # ax.plot(xdata, ydata2, '-')

    # ax.plot(xdata, ydata3, '-')

    # p.set_ydata(ydata)

    # p.set_xdata(xdata)

    # ax.set_ylim([min(min(ydata),min(ydata3))*0.9, max(max(ydata),max(ydata3))*1.1])

    ax.set_ylim([min(ydata)*0.9, max(ydata)*1.1])

    ax.set_xlim([min(xdata),max(xdata)])

    ax.set_xlabel("Time")

    ax.set_ylabel("Current (mA)")

    fig.show()

    draw()

    sleep(0.01)

    if len(ydata) > 100:

        ydata = ydata[-100:]

        # ydata2 = ydata2[-100:]

        # ydata3 = ydata3[-100:]

        # ydata2 = ydata3[-100:]

        xdata = xdata[-100:]