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622 lines
27 KiB
Python
622 lines
27 KiB
Python
# This file is part of the OpenMV project.
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#
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# Copyright (c) 2013-2020 Ibrahim Abdelkader <iabdalkader@openmv.io>
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# Copyright (c) 2013-2020 Kwabena W. Agyeman <kwagyeman@openmv.io>
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#
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# This work is licensed under the MIT license, see the file LICENSE for details.
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import gc, serial, socket, struct, time
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class rpc:
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_COMMAND_HEADER_PACKET_MAGIC = 0x1209
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_COMMAND_DATA_PACKET_MAGIC = 0xABD1
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_RESULT_HEADER_PACKET_MAGIC = 0x9021
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_RESULT_DATA_PACKET_MAGIC = 0x1DBA
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def __def_crc_16(self, data, size): # private
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crc = 0xFFFF
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for i in range(size):
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crc ^= data[i] << 8
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for j in range(8): crc = (crc << 1) ^ (0x1021 if crc & 0x8000 else 0)
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return crc & 0xFFFF
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def _zero(self, buff, size): # private
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for i in range(size): buff[i] = 0
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def _same(self, data, size): # private
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if not size: return False
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old = data[0]
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for i in range(1, size):
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new = data[i]
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if new != old: return False
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old = new
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return True
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# djb2 algorithm; see http://www.cse.yorku.ca/~oz/hash.html
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def _hash(self, data, size): # private
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h = 5381
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for i in range(size):
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h = ((h << 5) + h) ^ ord(data[i])
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return h & 0xFFFFFFFF
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def __init__(self): # private
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self.__crc_16 = self.__def_crc_16
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self._stream_writer_queue_depth_max = 255
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def _get_packet_pre_alloc(self, payload_len=0):
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buff = bytearray(payload_len + 4)
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return (buff, memoryview(buff)[2:-2])
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def _get_packet(self, magic_value, payload_buf_tuple, timeout): # private
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packet = self.get_bytes(payload_buf_tuple[0], timeout)
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if packet is not None:
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magic = packet[0] | (packet[1] << 8)
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crc = packet[-2] | (packet[-1] << 8)
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if magic == magic_value and crc == self.__crc_16(packet, len(packet) - 2):
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return payload_buf_tuple[1]
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return None
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def _set_packet(self, magic_value, payload=bytes()): # private
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new_payload = bytearray(len(payload) + 4)
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new_payload[:2] = struct.pack("<H", magic_value)
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# Fix Python 3.x.
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try: new_payload[2:-2] = payload
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except TypeError: new_payload[2:-2] = payload.encode()
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new_payload[-2:] = struct.pack("<H", self.__crc_16(new_payload, len(payload) + 2))
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return new_payload
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def _flush(self): # protected
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pass
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def get_bytes(self, buff, timeout_ms): # protected
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return bytes()
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def put_bytes(self, data, timeout_ms): # protected
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pass
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def stream_reader(self, call_back, queue_depth=1, read_timeout_ms=5000): # public
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try: self._stream_put_bytes(self._set_packet(0xEDF6, struct.pack("<I", queue_depth)), 1000)
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except OSError: return
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tx_lfsr = 255
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while True:
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packet = self._stream_get_bytes(bytearray(8), 1000)
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if packet is None: return
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magic = packet[0] | (packet[1] << 8)
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crc = packet[-2] | (packet[-1] << 8)
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if magic != 0x542E and crc != self.__crc_16(packet, len(packet) - 2): return
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data = self._stream_get_bytes(bytearray(struct.unpack("<I", packet[2:-2])[0]), read_timeout_ms)
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if data is None: return
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call_back(data)
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try: self._stream_put_bytes(struct.pack("<B", tx_lfsr), 1000)
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except OSError: return
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tx_lfsr = (tx_lfsr >> 1) ^ (0xB8 if tx_lfsr & 1 else 0x00)
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def stream_writer(self, call_back, write_timeout_ms=5000): # public
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packet = self._stream_get_bytes(bytearray(8), 1000)
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if packet is None: return
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magic = packet[0] | (packet[1] << 8)
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crc = packet[-2] | (packet[-1] << 8)
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if magic != 0xEDF6 and crc != self.__crc_16(packet, len(packet) - 2): return
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queue_depth = max(min(struct.unpack("<I", packet[2:-2])[0], self._stream_writer_queue_depth_max), 1)
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rx_lfsr = 255
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credits = queue_depth
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while True:
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if credits <= (queue_depth // 2):
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data = self._stream_get_bytes(bytearray(1), 1000)
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if data is None or data[0] != rx_lfsr: return
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rx_lfsr = (rx_lfsr >> 1) ^ (0xB8 if rx_lfsr & 1 else 0x00)
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credits += 1
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if credits > 0:
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data = call_back()
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try: self._stream_put_bytes(self._set_packet(0x542E, struct.pack("<I", len(data))), 1000)
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except OSError: return
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try: self._stream_put_bytes(data, write_timeout_ms)
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except OSError: return
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credits -= 1
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def _stream_get_bytes(self, buff, timeout_ms): # protected
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return self.get_bytes(buff, timeout_ms)
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def _stream_put_bytes(self, data, timeout_ms): # protected
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self.put_bytes(data, timeout_ms)
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class rpc_master(rpc):
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def __init__(self): # private
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rpc.__init__(self)
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self.__in_command_header_buf = self._get_packet_pre_alloc()
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self.__in_command_data_buf = self._get_packet_pre_alloc()
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self.__out_result_header_ack = self._set_packet(self._RESULT_HEADER_PACKET_MAGIC)
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self.__in_result_header_buf = self._get_packet_pre_alloc(4)
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self.__out_result_data_ack = self._set_packet(self._RESULT_DATA_PACKET_MAGIC)
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self._put_short_timeout_reset = 3
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self._get_short_timeout_reset = 3
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self._put_long_timeout = 5000
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self._get_long_timeout = 5000
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def __put_command(self, command, data, timeout): # private
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self._put_short_timeout = self._put_short_timeout_reset
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self._get_short_timeout = self._get_short_timeout_reset
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out_header = self._set_packet(self._COMMAND_HEADER_PACKET_MAGIC, struct.pack("<II", command, len(data)))
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out_data = self._set_packet(self._COMMAND_DATA_PACKET_MAGIC, data)
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start = int(time.time() * 1000)
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while (int(time.time() * 1000) - start) < timeout:
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gc.collect() # Avoid collection during the transfer.
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self._zero(self.__in_command_header_buf[0], len(self.__in_command_header_buf[0]))
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self._zero(self.__in_command_data_buf[0], len(self.__in_command_data_buf[0]))
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self._flush()
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self.put_bytes(out_header, self._put_short_timeout)
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if self._get_packet(self._COMMAND_HEADER_PACKET_MAGIC, self.__in_command_header_buf, self._get_short_timeout) is not None:
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self.put_bytes(out_data, self._put_long_timeout)
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if self._get_packet(self._COMMAND_DATA_PACKET_MAGIC, self.__in_command_data_buf, self._get_short_timeout) is not None:
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return True
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# Avoid timeout livelocking.
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self._put_short_timeout = min((self._put_short_timeout * 4) // 3, timeout)
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self._get_short_timeout = min((self._get_short_timeout * 4) // 3, timeout)
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return False
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def __get_result(self, timeout): # private
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self._put_short_timeout = self._put_short_timeout_reset
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self._get_short_timeout = self._get_short_timeout_reset
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start = int(time.time() * 1000)
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while (int(time.time() * 1000) - start) < timeout:
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gc.collect() # Avoid collection during the transfer.
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self._zero(self.__in_result_header_buf[0], len(self.__in_result_header_buf[0]))
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self._flush()
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self.put_bytes(self.__out_result_header_ack, self._put_short_timeout)
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packet = self._get_packet(self._RESULT_HEADER_PACKET_MAGIC, self.__in_result_header_buf, self._get_short_timeout)
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if packet is not None:
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in_result_data_buf = self._get_packet_pre_alloc(struct.unpack("<I", packet)[0])
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self.put_bytes(self.__out_result_data_ack, self._put_short_timeout)
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dat_packet = self._get_packet(self._RESULT_DATA_PACKET_MAGIC, in_result_data_buf, self._get_long_timeout)
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if dat_packet is not None:
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return dat_packet
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# Avoid timeout livelocking.
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self._put_short_timeout = min((self._put_short_timeout * 4) // 3, timeout)
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self._get_short_timeout = min((self._get_short_timeout * 4) // 3, timeout)
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return None
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def call(self, name, data=bytes(), send_timeout=1000, recv_timeout=1000): # public
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return self.__get_result(recv_timeout) if self.__put_command(self._hash(name, len(name)), data, send_timeout) else None
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class rpc_slave(rpc):
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def __init__(self): # private
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self.__dict = {}
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self.__schedule_cb = None
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self.__loop_cb = None
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rpc.__init__(self)
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self.__in_command_header_buf = self._get_packet_pre_alloc(8)
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self.__out_command_header_ack = self._set_packet(self._COMMAND_HEADER_PACKET_MAGIC)
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self.__out_command_data_ack = self._set_packet(self._COMMAND_DATA_PACKET_MAGIC)
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self.__in_response_header_buf = self._get_packet_pre_alloc()
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self.__in_response_data_buf = self._get_packet_pre_alloc()
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self._put_short_timeout_reset = 2
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self._get_short_timeout_reset = 2
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self._put_long_timeout = 5000
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self._get_long_timeout = 5000
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def __get_command(self, timeout): # private
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self._put_short_timeout = self._put_short_timeout_reset
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self._get_short_timeout = self._get_short_timeout_reset
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start = int(time.time() * 1000)
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while (int(time.time() * 1000) - start) < timeout:
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gc.collect() # Avoid collection during the transfer.
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self._zero(self.__in_command_header_buf[0], len(self.__in_command_header_buf[0]))
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self._flush()
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packet = self._get_packet(self._COMMAND_HEADER_PACKET_MAGIC, self.__in_command_header_buf, self._get_short_timeout)
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if packet is not None:
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command, datalen = struct.unpack("<II", packet)
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in_command_data_buf = self._get_packet_pre_alloc(datalen)
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self.put_bytes(self.__out_command_header_ack, self._put_short_timeout)
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dat_packet = self._get_packet(self._COMMAND_DATA_PACKET_MAGIC, in_command_data_buf, self._get_long_timeout)
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if dat_packet is not None:
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self.put_bytes(self.__out_command_data_ack, self._put_short_timeout)
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return (command, dat_packet)
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# Avoid timeout livelocking.
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self._put_short_timeout = min(self._put_short_timeout + 1, timeout)
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self._get_short_timeout = min(self._get_short_timeout + 1, timeout)
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return (None, None)
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def __put_result(self, data, timeout): # private
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self._put_short_timeout = self._put_short_timeout_reset
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self._get_short_timeout = self._get_short_timeout_reset
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out_header = self._set_packet(self._RESULT_HEADER_PACKET_MAGIC, struct.pack("<I", len(data)))
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out_data = self._set_packet(self._RESULT_DATA_PACKET_MAGIC, data)
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start = int(time.time() * 1000)
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while (int(time.time() * 1000) - start) < timeout:
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gc.collect() # Avoid collection during the transfer.
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self._zero(self.__in_response_header_buf[0], len(self.__in_response_header_buf[0]))
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self._zero(self.__in_response_data_buf[0], len(self.__in_response_data_buf[0]))
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self._flush()
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if self._get_packet(self._RESULT_HEADER_PACKET_MAGIC, self.__in_response_header_buf, self._get_short_timeout) is not None:
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self.put_bytes(out_header, self._put_short_timeout)
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if self._get_packet(self._RESULT_DATA_PACKET_MAGIC, self.__in_response_data_buf, self._get_short_timeout) is not None:
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self.put_bytes(out_data, self._put_long_timeout)
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return True
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# Avoid timeout livelocking.
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self._put_short_timeout = min(self._put_short_timeout + 1, timeout)
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self._get_short_timeout = min(self._get_short_timeout + 1, timeout)
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return False
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def register_callback(self, cb): # public
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self.__dict[self._hash(cb.__name__, len(cb.__name__))] = cb
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def schedule_callback(self, cb): # public
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self.__schedule_cb = cb
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def setup_loop_callback(self, cb): # public
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self.__loop_cb = cb
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def loop(self, recv_timeout=1000, send_timeout=1000): # public
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while True:
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command, data = self.__get_command(recv_timeout)
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if command is not None:
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cb = self.__dict.get(command)
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if self.__put_result(cb(data) if cb is not None else bytes(), send_timeout) and self.__schedule_cb is not None:
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self.__schedule_cb()
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self.__schedule_cb = None
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if self.__loop_cb is not None: self.__loop_cb()
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class rpc_usb_vcp_master(rpc_master):
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# We need to do reads this way so that we get a short timeout while waiting for data and then
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# no timeout while data is coming in. pyserial inter_byte_timeout does not work.
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def __get_bytes(self, buff):
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i = 0
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l = len(buff)
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while l:
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data = self.__ser.read(min(l, 1024)) # Starts a new timeout per call.
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data_len = len(data)
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if not data_len: return None
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buff[i:i+data_len] = data
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i += data_len
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l -= data_len
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return buff
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def __init__(self, port): # private
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self.__ser = serial.Serial(port, baudrate=115200, timeout=0.01)
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rpc_master.__init__(self)
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def _flush(self): # protected
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self.__ser.reset_input_buffer()
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def get_bytes(self, buff, timeout_ms): # protected
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if int(self.__ser.timeout * 100) != 1: self.__ser.timeout = 0.01 # Changing this causes control transfers.
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result = self.__get_bytes(buff)
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if result is None: time.sleep(timeout_ms * 0.001)
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return result
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def put_bytes(self, data, timeout_ms): # protected
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self.__ser.write(data)
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def _stream_get_bytes(self, buff, timeout_ms): # protected
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if int(self.__ser.timeout) != 1: self.__ser.timeout = 1 # Changing this causes control transfers.
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return self.__get_bytes(buff)
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class rpc_usb_vcp_slave(rpc_slave):
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# We need to do reads this way so that we get a short timeout while waiting for data and then
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# no timeout while data is coming in. pyserial inter_byte_timeout does not work.
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def __get_bytes(self, buff):
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i = 0
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l = len(buff)
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while l:
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data = self.__ser.read(min(l, 1024)) # Starts a new timeout per call.
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data_len = len(data)
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if not data_len: return None
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buff[i:i+data_len] = data
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i += data_len
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l -= data_len
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return buff
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def __init__(self, port): # private
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self.__ser = serial.Serial(port, baudrate=115200, timeout=0.01)
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rpc_slave.__init__(self)
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def _flush(self): # protected
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self.__ser.reset_input_buffer()
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def get_bytes(self, buff, timeout_ms): # protected
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if int(self.__ser.timeout * 100) != 1: self.__ser.timeout = 0.01 # Changing this causes control transfers.
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return self.__get_bytes(buff)
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def put_bytes(self, data, timeout_ms): # protected
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self.__ser.write(data)
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def _stream_get_bytes(self, buff, timeout_ms): # protected
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if int(self.__ser.timeout) != 1: self.__ser.timeout = 1 # Changing this causes control transfers.
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return self.__get_bytes(buff)
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class rpc_wifi_or_ethernet_master(rpc_master):
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def __valid_tcp_socket(self): # private
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if self.__tcp__socket is None:
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try:
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(self.__myaddr)
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s.listen(0)
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s.settimeout(1)
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self.__tcp__socket, addr = s.accept()
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s.close()
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except (socket.timeout, socket.error): self.__tcp__socket = None
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return self.__tcp__socket is not None
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def __close_tcp_socket(self): # private
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self.__tcp__socket.close()
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self.__tcp__socket = None
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def __valid_udp_socket(self): # private
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if self.__udp__socket is None:
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try:
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self.__udp__socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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self.__udp__socket.bind(self.__myaddr)
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except (socket.timeout, socket.error): self.__udp__socket = None
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return self.__udp__socket is not None
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def __close_udp_socket(self): # private
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self.__udp__socket.close()
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self.__udp__socket = None
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def __init__(self, slave_ip, my_ip="", port=0x1DBA): # private
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self._udp_limit = 1400
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self._timeout_scale = 10
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self.__myip = my_ip
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self.__myaddr = (self.__myip, port)
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self.__slave_addr = (slave_ip, port)
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self.__tcp__socket = None
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self.__udp__socket = None
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print("IP Address:Port %s:%d\nRunning..." % self.__myaddr)
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rpc_master.__init__(self)
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def _flush(self): # protected
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if self.__valid_udp_socket():
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try:
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self.__udp__socket.settimeout(0.001)
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while(True):
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data, addr = self.__udp__socket.recvfrom(1400)
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if not len(data): break
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except socket.timeout: pass
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except socket.error as err: self.__close_udp_socket()
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if self.__tcp__socket is not None:
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try:
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self.__tcp__socket.settimeout(0.001)
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while(True):
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data = self.__tcp__socket.recvfrom(1400)
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if not len(data): break
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except socket.timeout: pass
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except socket.error as err: self.__close_tcp_socket()
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def get_bytes(self, buff, timeout_ms): # protected
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i = 0
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l = len(buff)
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if l <= self._udp_limit:
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if self.__valid_udp_socket():
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try:
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self.__udp__socket.settimeout(self._get_short_timeout * 0.001 * self._timeout_scale)
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while l:
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data, addr = self.__udp__socket.recvfrom(min(l, 1400))
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data_len = len(data)
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if not data_len: break
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buff[i:i+data_len] = data
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i += data_len
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l -= data_len
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# We don't need to close the socket on error since it's connectionless.
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except socket.timeout: pass
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except socket.error: self.__close_udp_socket()
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elif self.__valid_tcp_socket():
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try:
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self.__tcp__socket.settimeout(100)
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while l:
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data = self.__tcp__socket.recv(min(l, 1400))
|
|
data_len = len(data)
|
|
if not data_len: break
|
|
buff[i:i+data_len] = data
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
return buff if not l else None
|
|
|
|
def put_bytes(self, data, timeout_ms): # protected
|
|
i = 0
|
|
l = len(data)
|
|
if l <= self._udp_limit:
|
|
if self.__valid_udp_socket():
|
|
try:
|
|
self.__udp__socket.settimeout(self._put_short_timeout * 0.001 * self._timeout_scale)
|
|
while l:
|
|
data_len = self.__udp__socket.sendto(data[i:i+min(l, 1400)], self.__slave_addr)
|
|
if not data_len: break
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_udp_socket()
|
|
except (socket.timeout, socket.error): self.__close_udp_socket()
|
|
elif self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(100)
|
|
while l:
|
|
data_len = self.__tcp_socket.send(data[i:i+min(l, 1400)])
|
|
if not data_len: break
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
|
|
def _stream_get_bytes(self, buff, timeout_ms): # protected
|
|
i = 0
|
|
l = len(buff)
|
|
if self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(timeout_ms * 0.001)
|
|
while l:
|
|
data = self.__tcp__socket.recv(min(l, 1400))
|
|
data_len = len(data)
|
|
if not data_len: break
|
|
buff[i:i+data_len] = data
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
return buff if not l else None
|
|
|
|
def _stream_put_bytes(self, data, timeout_ms): # protected
|
|
i = 0
|
|
l = len(data)
|
|
if self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(timeout_ms * 0.001)
|
|
while l:
|
|
data_len = self.__tcp__socket.send(data[i:i+min(l, 1400)])
|
|
if not data_len: break
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
if l: raise OSError # Stop Stream.
|
|
|
|
class rpc_wifi_or_ethernet_slave(rpc_slave):
|
|
|
|
def __valid_tcp_socket(self): # private
|
|
if self.__tcp__socket is None:
|
|
try:
|
|
self.__tcp__socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
|
self.__tcp__socket.connect(self.__master_addr)
|
|
except (socket.timeout, socket.error): self.__tcp__socket = None
|
|
return self.__tcp__socket is not None
|
|
|
|
def __close_tcp_socket(self): # private
|
|
self.__tcp__socket.close()
|
|
self.__tcp__socket = None
|
|
|
|
def __valid_udp_socket(self): # private
|
|
if self.__udp__socket is None:
|
|
try:
|
|
self.__udp__socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
self.__udp__socket.bind(self.__myaddr)
|
|
except (socket.timeout, socket.error): self.__udp__socket = None
|
|
return self.__udp__socket is not None
|
|
|
|
def __close_udp_socket(self): # private
|
|
self.__udp__socket.close()
|
|
self.__udp__socket = None
|
|
|
|
def __init__(self, my_ip="", port=0x1DBA): # private
|
|
self._udp_limit = 1400
|
|
self._timeout_scale = 10
|
|
self.__myip = my_ip
|
|
self.__myaddr = (self.__myip, port)
|
|
self.__master_addr = None
|
|
self.__tcp__socket = None
|
|
self.__udp__socket = None
|
|
print("IP Address:Port %s:%d\nRunning..." % self.__myaddr)
|
|
rpc_slave.__init__(self)
|
|
|
|
def _flush(self): # protected
|
|
if self.__valid_udp_socket():
|
|
try:
|
|
self.__udp__socket.settimeout(0.001)
|
|
while(True):
|
|
data, addr = self.__udp__socket.recvfrom(1400)
|
|
if not len(data): break
|
|
except socket.timeout: pass
|
|
except socket.error: self.__close_udp_socket()
|
|
if self.__tcp__socket is not None:
|
|
try:
|
|
self.__tcp__socket.settimeout(0.001)
|
|
while(True):
|
|
data = self.__tcp__socket.recvfrom(1400)
|
|
if not len(data): break
|
|
except socket.timeout: pass
|
|
except socket.error: self.__close_tcp_socket()
|
|
|
|
def get_bytes(self, buff, timeout_ms): # protected
|
|
i = 0
|
|
l = len(buff)
|
|
if l <= self._udp_limit:
|
|
if self.__valid_udp_socket():
|
|
try:
|
|
self.__udp__socket.settimeout(self._get_short_timeout * 0.001 * self._timeout_scale)
|
|
while l:
|
|
data, addr = self.__udp__socket.recvfrom(min(l, 1400))
|
|
data_len = len(data)
|
|
if not data_len: break
|
|
buff[i:i+data_len] = data
|
|
self.__master_addr = addr
|
|
i += data_len
|
|
l -= data_len
|
|
# We don't need to close the socket on error since it's connectionless.
|
|
except socket.timeout: pass
|
|
except socket.error: self.__close_udp_socket()
|
|
elif self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(100)
|
|
while l:
|
|
data = self.__tcp__socket.recv(min(l, 1400))
|
|
data_len = len(data)
|
|
if not data_len: break
|
|
buff[i:i+data_len] = data
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
return buff if not l else None
|
|
|
|
def put_bytes(self, data, timeout_ms): # protected
|
|
i = 0
|
|
l = len(data)
|
|
if l <= self._udp_limit:
|
|
if self.__valid_udp_socket():
|
|
try:
|
|
self.__udp__socket.settimeout(self._put_short_timeout * 0.001 * self._timeout_scale)
|
|
while l:
|
|
data_len = self.__udp__socket.sendto(data[i:i+min(l, 1400)], self.__master_addr)
|
|
if not data_len: break
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_udp_socket()
|
|
except (socket.timeout, socket.error): self.__close_udp_socket()
|
|
elif self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(100)
|
|
while l:
|
|
data_len = self.__tcp__socket.send(data[i:i+min(l, 1400)])
|
|
if not data_len: break
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
|
|
def _stream_get_bytes(self, buff, timeout_ms): # protected
|
|
i = 0
|
|
l = len(buff)
|
|
if self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(timeout_ms * 0.001)
|
|
while l:
|
|
data = self.__tcp__socket.recv(min(l, 1400))
|
|
data_len = len(data)
|
|
if not data_len: break
|
|
buff[i:i+data_len] = data
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
return buff if not l else None
|
|
|
|
def _stream_put_bytes(self, data, timeout_ms): # protected
|
|
i = 0
|
|
l = len(data)
|
|
if self.__valid_tcp_socket():
|
|
try:
|
|
self.__tcp__socket.settimeout(timeout_ms * 0.001)
|
|
while l:
|
|
data_len = self.__tcp__socket.send(data[i:i+min(l, 1400)])
|
|
if not data_len: break
|
|
i += data_len
|
|
l -= data_len
|
|
if l: self.__close_tcp_socket()
|
|
except (socket.timeout, socket.error): self.__close_tcp_socket()
|
|
if l: raise OSError # Stop Stream.
|