from spinnman.messages.scp.impl \
import WriteLink, WriteMemory
from .abstract_multi_connection_process import AbstractMultiConnectionProcess
from spinnman.constants import UDP_MESSAGE_MAX_SIZE
import functools
[docs]class WriteMemoryProcess(AbstractMultiConnectionProcess):
""" A process for writing memory
"""
def __init__(self, connection_selector):
AbstractMultiConnectionProcess.__init__(
self, connection_selector,
n_channels=1, intermediate_channel_waits=0)
[docs] def write_memory_from_bytearray(
self, x, y, p, base_address, data, offset, n_bytes):
"""
writes memory onto a spinnaker chip from a bytearray
:param x: the x coord of the chip in question
:param y: the y coord of the chip in question
:param p: the p coord of the chip in question
:param base_address: the address in sdram to start writing
:param data: the data to write
:param offset: where in the data to start writing from
:param n_bytes: how much data to write
:rtype: None
"""
self._write_memory_from_bytearray(
base_address, data, offset, n_bytes,
functools.partial(WriteMemory, x=x, y=y, cpu=p))
[docs] def write_link_memory_from_bytearray(self, x, y, p, link, base_address,
data, offset, n_bytes):
self._write_memory_from_bytearray(
base_address, data, offset, n_bytes,
functools.partial(WriteLink, x=x, y=y, cpu=p, link=link))
[docs] def write_memory_from_reader(self, x, y, p, base_address, data, n_bytes):
self._write_memory_from_reader(
base_address, data, n_bytes,
functools.partial(WriteMemory, x=x, y=y, cpu=p))
[docs] def write_link_memory_from_reader(self, x, y, p, link, base_address, data,
n_bytes):
self._write_memory_from_reader(
base_address, data, n_bytes,
functools.partial(WriteLink, x=x, y=y, cpu=p, link=link))
def _write_memory_from_bytearray(self, base_address, data, offset,
n_bytes, packet_class):
data_offset = offset
offset = base_address
n_bytes_to_write = int(n_bytes)
while n_bytes_to_write > 0:
bytes_to_send = min((n_bytes_to_write, UDP_MESSAGE_MAX_SIZE))
request = packet_class(
base_address=offset,
data=data[data_offset:data_offset + bytes_to_send])
self._send_request(request)
n_bytes_to_write -= bytes_to_send
offset += bytes_to_send
data_offset += bytes_to_send
self._finish()
self.check_for_error()
def _write_memory_from_reader(self, base_address, data, n_bytes,
packet_class):
offset = base_address
n_bytes_to_write = int(n_bytes)
while n_bytes_to_write > 0:
bytes_to_send = n_bytes_to_write
if bytes_to_send > UDP_MESSAGE_MAX_SIZE:
bytes_to_send = UDP_MESSAGE_MAX_SIZE
data_array = data.read(bytes_to_send)
data_length = len(data_array)
request = packet_class(base_address=offset, data=data_array)
self._send_request(request)
n_bytes_to_write -= data_length
offset += data_length
self._finish()
self.check_for_error()