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https://github.com/m-labs/artiq.git
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coredevice/comm: split protocol to allow reuse for Ethernet
This commit is contained in:
parent
44304a33b2
commit
cb2596bd81
202
artiq/coredevice/comm_generic.py
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202
artiq/coredevice/comm_generic.py
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@ -0,0 +1,202 @@
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import struct
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import zlib
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import logging
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from enum import Enum
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from fractions import Fraction
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from artiq.language import units
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from artiq.coredevice.runtime import Environment
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from artiq.coredevice import runtime_exceptions
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from artiq.language import core as core_language
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from artiq.coredevice.rpc_wrapper import RPCWrapper
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logger = logging.getLogger(__name__)
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class _H2DMsgType(Enum):
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LINK_MESSAGE = 1
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REQUEST_IDENT = 2
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SWITCH_CLOCK = 3
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LOAD_OBJECT = 4
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RUN_KERNEL = 5
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class _D2HMsgType(Enum):
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MESSAGE_UNRECOGNIZED = 1
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LOG = 2
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IDENT = 3
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CLOCK_SWITCH_COMPLETED = 4
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CLOCK_SWITCH_FAILED = 5
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OBJECT_LOADED = 6
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OBJECT_INCORRECT_LENGTH = 7
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OBJECT_CRC_FAILED = 8
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OBJECT_UNRECOGNIZED = 9
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KERNEL_FINISHED = 10
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KERNEL_STARTUP_FAILED = 11
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KERNEL_EXCEPTION = 12
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RPC_REQUEST = 13
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class UnsupportedDevice(Exception):
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pass
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class CommGeneric:
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# methods for derived classes to implement
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def open(self):
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"""Opens the communication channel.
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Must do nothing if already opened."""
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raise NotImplementedError
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def close(self):
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"""Closes the communication channel.
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Must do nothing if already closed."""
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raise NotImplementedError
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def read(self, length):
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"""Reads exactly length bytes from the communication channel.
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The channel is assumed to be opened."""
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raise NotImplementedError
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def write(self, data):
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"""Writes exactly length bytes to the communication channel.
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The channel is assumed to be opened."""
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raise NotImplementedError
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#
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def _read(self, length):
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self.open()
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return self.read(length)
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def _write(self, data):
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self.open()
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self.write(data)
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def _get_device_msg(self):
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while True:
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(reply, ) = struct.unpack("B", self._read(1))
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msg = _D2HMsgType(reply)
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if msg == _D2HMsgType.LOG:
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(length, ) = struct.unpack(">h", self._read(2))
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log_message = ""
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for i in range(length):
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(c, ) = struct.unpack("B", self._read(1))
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log_message += chr(c)
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logger.info("DEVICE LOG: %s", log_message)
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else:
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logger.debug("message received: %r", msg)
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return msg
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def get_runtime_env(self):
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self._write(struct.pack(">lb", 0x5a5a5a5a,
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_H2DMsgType.REQUEST_IDENT.value))
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msg = self._get_device_msg()
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if msg != _D2HMsgType.IDENT:
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raise IOError("Incorrect reply from device: {}".format(msg))
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(reply, ) = struct.unpack("B", self._read(1))
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runtime_id = chr(reply)
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for i in range(3):
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(reply, ) = struct.unpack("B", self._read(1))
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runtime_id += chr(reply)
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if runtime_id != "AROR":
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raise UnsupportedDevice("Unsupported runtime ID: {}"
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.format(runtime_id))
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ref_freq_i, ref_freq_fn, ref_freq_fd = struct.unpack(
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">lBB", self._read(6))
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ref_freq = (ref_freq_i + Fraction(ref_freq_fn, ref_freq_fd))*units.Hz
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ref_period = 1/ref_freq
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logger.debug("environment ref_period: %s", ref_period)
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return Environment(ref_period)
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def switch_clock(self, external):
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self._write(struct.pack(
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">lbb", 0x5a5a5a5a, _H2DMsgType.SWITCH_CLOCK.value,
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int(external)))
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msg = self._get_device_msg()
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if msg != _D2HMsgType.CLOCK_SWITCH_COMPLETED:
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raise IOError("Incorrect reply from device: {}".format(msg))
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def load(self, kcode):
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self._write(struct.pack(
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">lblL",
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0x5a5a5a5a, _H2DMsgType.LOAD_OBJECT.value,
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len(kcode), zlib.crc32(kcode)))
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self._write(kcode)
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msg = self._get_device_msg()
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if msg != _D2HMsgType.OBJECT_LOADED:
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raise IOError("Incorrect reply from device: "+str(msg))
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def run(self, kname):
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self._write(struct.pack(
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">lbl", 0x5a5a5a5a, _H2DMsgType.RUN_KERNEL.value, len(kname)))
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for c in kname:
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self._write(struct.pack(">B", ord(c)))
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logger.debug("running kernel: %s", kname)
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def _receive_rpc_values(self):
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r = []
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while True:
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type_tag = chr(struct.unpack(">B", self._read(1))[0])
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if type_tag == "\x00":
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return r
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if type_tag == "n":
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r.append(None)
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if type_tag == "b":
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r.append(bool(struct.unpack(">B", self._read(1))[0]))
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if type_tag == "i":
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r.append(struct.unpack(">l", self._read(4))[0])
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if type_tag == "I":
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r.append(struct.unpack(">q", self._read(8))[0])
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if type_tag == "f":
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r.append(struct.unpack(">d", self._read(8))[0])
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if type_tag == "F":
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n, d = struct.unpack(">qq", self._read(16))
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r.append(Fraction(n, d))
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if type_tag == "l":
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r.append(self._receive_rpc_values())
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def _serve_rpc(self, rpc_wrapper, rpc_map, user_exception_map):
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rpc_num = struct.unpack(">h", self._read(2))[0]
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args = self._receive_rpc_values()
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logger.debug("rpc service: %d %r", rpc_num, args)
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eid, r = rpc_wrapper.run_rpc(
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user_exception_map, rpc_map[rpc_num], args)
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self._write(struct.pack(">ll", eid, r))
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logger.debug("rpc service: %d %r == %r", rpc_num, args, r)
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def _serve_exception(self, rpc_wrapper, user_exception_map):
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eid, p0, p1, p2 = struct.unpack(">lqqq", self._read(4+3*8))
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rpc_wrapper.filter_rpc_exception(eid)
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if eid < core_language.first_user_eid:
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exception = runtime_exceptions.exception_map[eid]
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raise exception(self.core, p0, p1, p2)
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else:
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exception = user_exception_map[eid]
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raise exception
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def serve(self, rpc_map, user_exception_map):
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rpc_wrapper = RPCWrapper()
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while True:
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msg = self._get_device_msg()
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if msg == _D2HMsgType.RPC_REQUEST:
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self._serve_rpc(rpc_wrapper, rpc_map, user_exception_map)
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elif msg == _D2HMsgType.KERNEL_EXCEPTION:
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self._serve_exception(rpc_wrapper, user_exception_map)
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elif msg == _D2HMsgType.KERNEL_FINISHED:
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return
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else:
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raise IOError("Incorrect request from device: "+str(msg))
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def send_link_message(self, data):
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self._write(struct.pack(
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">lb", 0x5a5a5a5a, _H2DMsgType.LINK_MESSAGE.value))
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self._write(data)
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@ -1,89 +1,59 @@
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import logging
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import serial
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import struct
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import zlib
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from enum import Enum
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from fractions import Fraction
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import logging
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from artiq.language import core as core_language
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from artiq.language import units
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from artiq.coredevice.comm_generic import CommGeneric
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from artiq.language.db import *
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from artiq.coredevice.runtime import Environment
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from artiq.coredevice import runtime_exceptions
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from artiq.coredevice.rpc_wrapper import RPCWrapper
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logger = logging.getLogger(__name__)
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class UnsupportedDevice(Exception):
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pass
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class _H2DMsgType(Enum):
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REQUEST_IDENT = 1
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LOAD_OBJECT = 2
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RUN_KERNEL = 3
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SET_BAUD_RATE = 4
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SWITCH_CLOCK = 5
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class _D2HMsgType(Enum):
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LOG = 1
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MESSAGE_UNRECOGNIZED = 2
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IDENT = 3
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OBJECT_LOADED = 4
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INCORRECT_LENGTH = 5
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CRC_FAILED = 6
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OBJECT_UNRECOGNIZED = 7
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KERNEL_FINISHED = 8
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KERNEL_EXCEPTION = 9
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KERNEL_STARTUP_FAILED = 10
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RPC_REQUEST = 11
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CLOCK_SWITCH_COMPLETED = 12
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CLOCK_SWITCH_FAILED = 13
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def _write_exactly(f, data):
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remaining = len(data)
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pos = 0
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while remaining:
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written = f.write(data[pos:])
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remaining -= written
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pos += written
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def _read_exactly(f, n):
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r = bytes()
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while(len(r) < n):
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r += f.read(n - len(r))
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return r
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class Comm(AutoDB):
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class Comm(CommGeneric, AutoDB):
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class DBKeys:
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serial_dev = Parameter("/dev/ttyUSB1")
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serial_dev = Parameter()
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baud_rate = Parameter(115200)
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def build(self):
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def open(self):
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if hasattr(self, "port"):
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return
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self.port = serial.serial_for_url(self.serial_dev, baudrate=115200)
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self.port.flush()
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self.set_remote_baud(self.baud_rate)
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self.set_baud(self.baud_rate)
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self.rpc_wrapper = RPCWrapper()
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def close(self):
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if not hasattr(self, "port"):
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return
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self.set_remote_baud(115200)
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self.port.close()
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del self.port
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def read(self, length):
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r = bytes()
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while(len(r) < length):
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r += self.port.read(length - len(r))
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return r
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def write(self, data):
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remaining = len(data)
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pos = 0
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while remaining:
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written = self.port.write(data[pos:])
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remaining -= written
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pos += written
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def set_baud(self, baud):
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self.port.baudrate = baud
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self.port.flush()
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logger.debug("baud rate set to %d", baud)
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logger.debug("local baud rate set to %d", baud)
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def set_remote_baud(self, baud):
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_write_exactly(self.port, struct.pack(
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">lbl", 0x5a5a5a5a, _H2DMsgType.SET_BAUD_RATE.value, baud))
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self.send_link_message(struct.pack(">l", baud))
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handshake = 0
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fails = 0
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while handshake < 4:
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(recv, ) = struct.unpack("B", _read_exactly(self.port, 1))
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(recv, ) = struct.unpack("B", self.read(1))
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if recv == 0x5a:
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handshake += 1
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else:
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@ -95,124 +65,4 @@ class Comm(AutoDB):
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fails += 1
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if fails > 3:
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raise IOError("Baudrate ack failed")
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self.set_baud(baud)
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logger.debug("synchronized")
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def close(self):
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self.set_remote_baud(115200)
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self.port.close()
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def _get_device_msg(self):
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while True:
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(reply, ) = struct.unpack("B", _read_exactly(self.port, 1))
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msg = _D2HMsgType(reply)
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if msg == _D2HMsgType.LOG:
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(length, ) = struct.unpack(">h", _read_exactly(self.port, 2))
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log_message = ""
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for i in range(length):
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(c, ) = struct.unpack("B", _read_exactly(self.port, 1))
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log_message += chr(c)
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logger.info("DEVICE LOG: %s", log_message)
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else:
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logger.debug("message received: %r", msg)
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return msg
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def get_runtime_env(self):
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_write_exactly(self.port, struct.pack(
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">lb", 0x5a5a5a5a, _H2DMsgType.REQUEST_IDENT.value))
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msg = self._get_device_msg()
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if msg != _D2HMsgType.IDENT:
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raise IOError("Incorrect reply from device: "+str(msg))
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(reply, ) = struct.unpack("B", _read_exactly(self.port, 1))
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runtime_id = chr(reply)
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for i in range(3):
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(reply, ) = struct.unpack("B", _read_exactly(self.port, 1))
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runtime_id += chr(reply)
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if runtime_id != "AROR":
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raise UnsupportedDevice("Unsupported runtime ID: "+runtime_id)
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ref_freq_i, ref_freq_fn, ref_freq_fd = struct.unpack(
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">lBB", _read_exactly(self.port, 6))
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ref_freq = (ref_freq_i + Fraction(ref_freq_fn, ref_freq_fd))*units.Hz
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ref_period = 1/ref_freq
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logger.debug("environment ref_period: %s", ref_period)
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return Environment(ref_period)
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def switch_clock(self, external):
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_write_exactly(self.port, struct.pack(
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">lbb", 0x5a5a5a5a, _H2DMsgType.SWITCH_CLOCK.value,
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int(external)))
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msg = self._get_device_msg()
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if msg != _D2HMsgType.CLOCK_SWITCH_COMPLETED:
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raise IOError("Incorrect reply from device: "+str(msg))
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def load(self, kcode):
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_write_exactly(self.port, struct.pack(
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">lblL",
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0x5a5a5a5a, _H2DMsgType.LOAD_OBJECT.value,
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len(kcode), zlib.crc32(kcode)))
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_write_exactly(self.port, kcode)
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msg = self._get_device_msg()
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if msg != _D2HMsgType.OBJECT_LOADED:
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raise IOError("Incorrect reply from device: "+str(msg))
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def run(self, kname):
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_write_exactly(self.port, struct.pack(
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">lbl", 0x5a5a5a5a, _H2DMsgType.RUN_KERNEL.value, len(kname)))
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for c in kname:
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_write_exactly(self.port, struct.pack(">B", ord(c)))
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logger.debug("running kernel: %s", kname)
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def _receive_rpc_values(self):
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r = []
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while True:
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type_tag = chr(struct.unpack(">B", _read_exactly(self.port, 1))[0])
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if type_tag == "\x00":
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return r
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if type_tag == "n":
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r.append(None)
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if type_tag == "b":
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r.append(bool(struct.unpack(">B",
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_read_exactly(self.port, 1))[0]))
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if type_tag == "i":
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r.append(struct.unpack(">l", _read_exactly(self.port, 4))[0])
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if type_tag == "I":
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r.append(struct.unpack(">q", _read_exactly(self.port, 8))[0])
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if type_tag == "f":
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r.append(struct.unpack(">d", _read_exactly(self.port, 8))[0])
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if type_tag == "F":
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n, d = struct.unpack(">qq", _read_exactly(self.port, 16))
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r.append(Fraction(n, d))
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if type_tag == "l":
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r.append(self._receive_rpc_values())
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def _serve_rpc(self, rpc_map, user_exception_map):
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rpc_num = struct.unpack(">h", _read_exactly(self.port, 2))[0]
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args = self._receive_rpc_values()
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logger.debug("rpc service: %d %r", rpc_num, args)
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eid, r = self.rpc_wrapper.run_rpc(
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user_exception_map, rpc_map[rpc_num], args)
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_write_exactly(self.port, struct.pack(">ll", eid, r))
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logger.debug("rpc service: %d %r == %r", rpc_num, args, r)
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def _serve_exception(self, user_exception_map):
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eid, p0, p1, p2 = struct.unpack(">lqqq",
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_read_exactly(self.port, 4+3*8))
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self.rpc_wrapper.filter_rpc_exception(eid)
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if eid < core_language.first_user_eid:
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exception = runtime_exceptions.exception_map[eid]
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raise exception(self.core, p0, p1, p2)
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else:
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exception = user_exception_map[eid]
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raise exception
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def serve(self, rpc_map, user_exception_map):
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while True:
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msg = self._get_device_msg()
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if msg == _D2HMsgType.RPC_REQUEST:
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self._serve_rpc(rpc_map, user_exception_map)
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elif msg == _D2HMsgType.KERNEL_EXCEPTION:
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self._serve_exception(user_exception_map)
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elif msg == _D2HMsgType.KERNEL_FINISHED:
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return
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else:
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raise IOError("Incorrect request from device: "+str(msg))
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logger.debug("remote baud rate set to %d", baud)
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@ -12,33 +12,34 @@
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||||
|
||||
/* host to device */
|
||||
enum {
|
||||
MSGTYPE_REQUEST_IDENT = 1,
|
||||
MSGTYPE_SET_BAUD_RATE = 1,
|
||||
|
||||
MSGTYPE_REQUEST_IDENT,
|
||||
MSGTYPE_SWITCH_CLOCK,
|
||||
|
||||
MSGTYPE_LOAD_OBJECT,
|
||||
MSGTYPE_RUN_KERNEL,
|
||||
MSGTYPE_SET_BAUD_RATE,
|
||||
MSGTYPE_SWITCH_CLOCK,
|
||||
};
|
||||
|
||||
/* device to host */
|
||||
enum {
|
||||
MSGTYPE_LOG = 1,
|
||||
MSGTYPE_MESSAGE_UNRECOGNIZED,
|
||||
MSGTYPE_MESSAGE_UNRECOGNIZED = 1,
|
||||
MSGTYPE_LOG,
|
||||
|
||||
MSGTYPE_IDENT,
|
||||
MSGTYPE_CLOCK_SWITCH_COMPLETED,
|
||||
MSGTYPE_CLOCK_SWITCH_FAILED,
|
||||
|
||||
MSGTYPE_OBJECT_LOADED,
|
||||
MSGTYPE_INCORRECT_LENGTH,
|
||||
MSGTYPE_CRC_FAILED,
|
||||
MSGTYPE_OBJECT_INCORRECT_LENGTH,
|
||||
MSGTYPE_OBJECT_CRC_FAILED,
|
||||
MSGTYPE_OBJECT_UNRECOGNIZED,
|
||||
|
||||
MSGTYPE_KERNEL_FINISHED,
|
||||
MSGTYPE_KERNEL_EXCEPTION,
|
||||
MSGTYPE_KERNEL_STARTUP_FAILED,
|
||||
MSGTYPE_KERNEL_EXCEPTION,
|
||||
|
||||
MSGTYPE_RPC_REQUEST,
|
||||
|
||||
MSGTYPE_CLOCK_SWITCH_COMPLETED,
|
||||
MSGTYPE_CLOCK_SWITCH_FAILED,
|
||||
};
|
||||
|
||||
static int receive_int(void)
|
||||
@ -114,14 +115,14 @@ static void receive_and_load_object(object_loader load_object)
|
||||
|
||||
length = receive_int();
|
||||
if(length > sizeof(buffer)) {
|
||||
send_char(MSGTYPE_INCORRECT_LENGTH);
|
||||
send_char(MSGTYPE_OBJECT_INCORRECT_LENGTH);
|
||||
return;
|
||||
}
|
||||
crc = receive_int();
|
||||
for(i=0;i<length;i++)
|
||||
buffer[i] = receive_char();
|
||||
if(crc32(buffer, length) != crc) {
|
||||
send_char(MSGTYPE_CRC_FAILED);
|
||||
send_char(MSGTYPE_OBJECT_CRC_FAILED);
|
||||
return;
|
||||
}
|
||||
if(load_object(buffer, length))
|
||||
@ -140,7 +141,7 @@ static void receive_and_run_kernel(kernel_runner run_kernel)
|
||||
|
||||
length = receive_int();
|
||||
if(length > (sizeof(kernel_name)-1)) {
|
||||
send_char(MSGTYPE_INCORRECT_LENGTH);
|
||||
send_char(MSGTYPE_OBJECT_INCORRECT_LENGTH);
|
||||
return;
|
||||
}
|
||||
for(i=0;i<length;i++)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user