Spikey Bug: No spikes in for symmetric neuron populations

spikey_bug.py

#!/usr/bin/env python

'''
Spikey Bug: Neuron Populations
'''

import pyNN.hardware.spikey as pynn

pynn.setup()

params = {
    "v_thresh": -55.0,
    "v_rest": -60.0,
    "v_reset": -70.0
}
w = 0.016

# Create three neuron populations
source = pynn.Population(1, pynn.SpikeSourceArray, {'spike_times': [100.0, 200.0, 300.0]})
#neuron1 = pynn.Population(1, pynn.IF_facets_hardware1, params) # (1)
neuron1 = pynn.Population(2, pynn.IF_facets_hardware1, params) # (2)
neuron1.record()

neuron2 = pynn.Population(1, pynn.IF_facets_hardware1, params)
neuron2.record()

neuron3 = pynn.Population(1, pynn.IF_facets_hardware1, params)
neuron3.record()

# Connect source to neuron1 and neuron2
pynn.Projection(source, neuron1,
        pynn.FixedProbabilityConnector(p_connect=1.0, weights=w),
        target='excitatory')
pynn.Projection(source, neuron2,
        pynn.FixedProbabilityConnector(p_connect=1.0, weights=w),
        target='excitatory')
pynn.Projection(source, neuron3,
        pynn.FixedProbabilityConnector(p_connect=1.0, weights=w),
        target='excitatory')

pynn.run(1000.0)

# Print all spikes
print "Pop 1:"
print neuron1.getSpikes()

print "Pop 2:"
print neuron2.getSpikes()

print "Pop 3:"
print neuron3.getSpikes()

pynn.end()