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/>.

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


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 str 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().__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)])]