Source code for spinnman.processes.read_memory_process
import functools
from spinnman.messages.scp.impl \
import ReadLink, ReadMemory
from .abstract_multi_connection_process import AbstractMultiConnectionProcess
from spinnman.constants import UDP_MESSAGE_MAX_SIZE
[docs]class ReadMemoryProcess(AbstractMultiConnectionProcess):
""" A process for reading memory
"""
def __init__(self, connection_selector):
AbstractMultiConnectionProcess.__init__(self, connection_selector)
self._view = None
[docs] def handle_response(self, offset, response):
self._view[offset:offset + response.length] = response.data[
response.offset:response.offset + response.length]
[docs] def read_memory(self, x, y, p, base_address, length):
return self._read_memory(
base_address, length,
functools.partial(ReadMemory, x=x, y=y, cpu=p))
[docs] def read_link_memory(self, x, y, p, link, base_address, length):
return self._read_memory(
base_address, length,
functools.partial(ReadLink, x=x, y=y, cpu=p, link=link))
def _read_memory(self, base_address, length, packet_class):
data = bytearray(length)
self._view = memoryview(data)
n_bytes = length
offset = 0
while n_bytes > 0:
bytes_to_get = min((n_bytes, UDP_MESSAGE_MAX_SIZE))
response_handler = functools.partial(self.handle_response, offset)
self._send_request(
packet_class(base_address=base_address + offset,
size=bytes_to_get),
response_handler)
n_bytes -= bytes_to_get
offset += bytes_to_get
self._finish()
self.check_for_error()
return data