def __init__(self, board_address, update_timestep, target_spike_source):
# Superclass
super(TxThread, self).__init__()
# Cache timsetep
self._updateTimestep = update_timestep
self._target_spike_source = target_spike_source
# Create SDP connection to hist
self._connection = SDPConnection(board_address)
# Create SDP message
self._message = SCPMessage()
self._message.flags = 0x7
self._message.tag = 255
# Set source as ethernet core
self._message.src_cpu = 0
self._message.src_x = 0
self._message.src_y = 0
self._message.src_port = 255
# Set destination
self._message.dst_port = (1 << 5) | 1
class TxThread(threading.Thread):
def __init__(self, board_address, update_timestep, target_spike_source):
# Superclass
super(TxThread, self).__init__()
# Cache timsetep
self._updateTimestep = update_timestep
self._target_spike_source = target_spike_source
# Create SDP connection to hist
self._connection = SDPConnection(board_address)
# Create SDP message
self._message = SCPMessage()
self._message.flags = 0x7
self._message.tag = 255
# Set source as ethernet core
self._message.src_cpu = 0
self._message.src_x = 0
self._message.src_y = 0
self._message.src_port = 255
# Set destination
self._message.dst_port = (1 << 5) | 1
def run(self):
while(True):
# Sleep a bit
time.sleep(self._updateTimestep)
# **TEMP** set mean ISI to random number
self._message.arg1 = 0
self._message.arg2 = TxThread._doubleToS1516(4.0)
# Loop through target spike source's sub vertices
for subvertex in self._target_spike_source.vertex.subvertices:
# Get sub-vertex's placement and set as message destination
(x, y, p) = subvertex.placement.processor.get_coordinates()
self._message.dst_cpu = p
self._message.dst_x = x
self._message.dst_y = y
print("Sending command to %u %u %u" % (x, y, p))
# Send message
self._connection.send(self._message)
@staticmethod
def _doubleToS1516(double):
"""
Reformat a double into a 32-bit integer representing s1615 format
(i.e. signed 16.15).
Raise an exception if the value cannot be represented in this way.
"""
if (double < -65536) or (double > (65536.0-1/32768.0)):
raise Exception("ERROR: DSG - double cannot be recast as a s1615. Exiting.")
# Shift up by 15 bits:
scaledMyDouble = double * 32768.0
# Round to an integer:
# **THINK** should we actually round here?
myS1615 = int(scaledMyDouble)
return myS1615
