Source code for spynnaker.pyNN.external_devices_models.external_spinnaker_link_fpga_retina_device
# Copyright (c) 2017-2019 The University of Manchester
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
from spinn_utilities.overrides import overrides
from pacman.model.constraints.key_allocator_constraints import (
FixedKeyAndMaskConstraint)
from pacman.model.graphs.application import ApplicationSpiNNakerLinkVertex
from pacman.model.routing_info import BaseKeyAndMask
from spinn_front_end_common.abstract_models import (
AbstractProvidesOutgoingPartitionConstraints)
from spinn_front_end_common.abstract_models import (
AbstractSendMeMulticastCommandsVertex)
from spinn_front_end_common.abstract_models.impl import (
ProvidesKeyToAtomMappingImpl)
from spinn_front_end_common.utility_models import MultiCastCommand
from spynnaker.pyNN.exceptions import SpynnakerException
logger = logging.getLogger(__name__)
def get_y_from_fpga_retina(key, mode):
if mode == 128:
return key & 0x7f
elif mode == 64:
return key & 0x3f
elif mode == 32:
return key & 0x1f
elif mode == 16:
return key & 0xf
return None
def get_x_from_fpga_retina(key, mode):
if mode == 128:
return (key >> 7) & 0x7f
elif mode == 64:
return (key >> 6) & 0x3f
elif mode == 32:
return (key >> 5) & 0x1f
elif mode == 16:
return (key >> 4) & 0xf
return None
def get_spike_value_from_fpga_retina(key, mode):
if mode == 128:
return (key >> 14) & 0x1
elif mode == 64:
return (key >> 14) & 0x1
elif mode == 32:
return (key >> 14) & 0x1
elif mode == 16:
return (key >> 14) & 0x1
return None
[docs]class ExternalFPGARetinaDevice(
ApplicationSpiNNakerLinkVertex, AbstractSendMeMulticastCommandsVertex,
AbstractProvidesOutgoingPartitionConstraints,
ProvidesKeyToAtomMappingImpl):
__slots__ = [
"__fixed_key",
"__fixed_mask",
"__polarity"]
MODE_128 = "128"
MODE_64 = "64"
MODE_32 = "32"
MODE_16 = "16"
UP_POLARITY = "UP"
DOWN_POLARITY = "DOWN"
MERGED_POLARITY = "MERGED"
def __init__(
self, mode, retina_key, spinnaker_link_id, polarity,
label=None, board_address=None):
"""
:param str mode: The retina "mode"
:param int retina_key: The value of the top 16-bits of the key
:param int spinnaker_link_id:
The SpiNNaker link to which the retina is connected
:param str polarity: The "polarity" of the retina data
:param str label:
:param sr board_address:
"""
# pylint: disable=too-many-arguments
self.__polarity = polarity
self.__fixed_key = (retina_key & 0xFFFF) << 16
self.__fixed_mask = 0xFFFF8000
if polarity == self.UP_POLARITY:
self.__fixed_key |= 0x4000
fixed_n_neurons = self.get_n_neurons(mode, polarity)
self.__fixed_mask = self._get_mask(mode)
super(ExternalFPGARetinaDevice, self).__init__(
n_atoms=fixed_n_neurons, spinnaker_link_id=spinnaker_link_id,
label=label, max_atoms_per_core=fixed_n_neurons,
board_address=board_address)
def _get_mask(self, mode):
if mode == ExternalFPGARetinaDevice.MODE_128:
return 0xFFFFC000
elif mode == ExternalFPGARetinaDevice.MODE_64:
return 0xFFFFF000
elif mode == ExternalFPGARetinaDevice.MODE_32:
return 0xFFFFFC00
elif mode == ExternalFPGARetinaDevice.MODE_16:
return 0xFFFFFF00
raise SpynnakerException(
"the FPGA retina does not recognise this mode")
[docs] @staticmethod
def get_n_neurons(mode, polarity):
if mode == ExternalFPGARetinaDevice.MODE_128:
if (polarity == ExternalFPGARetinaDevice.UP_POLARITY or
polarity == ExternalFPGARetinaDevice.DOWN_POLARITY):
return 128 * 128
return 128 * 128 * 2
elif mode == ExternalFPGARetinaDevice.MODE_64:
if (polarity == ExternalFPGARetinaDevice.UP_POLARITY or
polarity == ExternalFPGARetinaDevice.DOWN_POLARITY):
return 64 * 64
return 64 * 64 * 2
elif mode == ExternalFPGARetinaDevice.MODE_32:
if (polarity == ExternalFPGARetinaDevice.UP_POLARITY or
polarity == ExternalFPGARetinaDevice.DOWN_POLARITY):
return 32 * 32
return 32 * 32 * 2
elif mode == ExternalFPGARetinaDevice.MODE_16:
if (polarity == ExternalFPGARetinaDevice.UP_POLARITY or
polarity == ExternalFPGARetinaDevice.DOWN_POLARITY):
return 16 * 16
return 16 * 16 * 2
raise SpynnakerException(
"the FPGA retina does not recognise this mode")
@property
@overrides(AbstractSendMeMulticastCommandsVertex.start_resume_commands)
def start_resume_commands(self):
return [MultiCastCommand(
key=0x0000FFFF, payload=1, repeat=5, delay_between_repeats=100)]
@property
@overrides(AbstractSendMeMulticastCommandsVertex.pause_stop_commands)
def pause_stop_commands(self):
return [MultiCastCommand(
key=0x0000FFFE, payload=0, repeat=5, delay_between_repeats=100)]
@property
@overrides(AbstractSendMeMulticastCommandsVertex.timed_commands)
def timed_commands(self):
return []
[docs] def get_outgoing_partition_constraints(self, partition):
return [FixedKeyAndMaskConstraint([
BaseKeyAndMask(self.__fixed_key, self.__fixed_mask)])]