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from libAnt.constants import * |
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class Message: |
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def __init__(self, type: int, content: bytes): |
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self._type = type |
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self._content = content |
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def __len__(self): |
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return len(self._content) |
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def __iter__(self): |
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return self._content |
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def __str__(self): |
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return '({:02X}): '.format(self._type) + ' '.join('{:02X}'.format(x) for x in self._content) |
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def checksum(self) -> int: |
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chk = MESSAGE_TX_SYNC ^ len(self) ^ self._type |
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for b in self._content: |
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chk ^= b |
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return chk |
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def encode(self) -> bytes: |
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b = bytearray([MESSAGE_TX_SYNC, len(self), self._type]) |
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b.extend(self._content) |
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b.append(self.checksum()) |
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return bytes(b) |
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@property |
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def type(self) -> int: |
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return self._type |
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@property |
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def content(self) -> bytes: |
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return self._content |
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class BroadcastMessage(Message): |
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def __init__(self, type: int, content: bytes): |
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self.flag = None |
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self.deviceNumber = self.deviceType = self.transType = None |
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self.rssiMeasurementType = self.rssi = self._rssiThreshold = None |
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self.rssi = None |
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self.rssiThreshold = None |
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self.rxTimestamp = None |
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self.channel = None |
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self.extendedContent = None |
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super().__init__(type, content) |
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def build(self, raw: bytes): |
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self._type = MESSAGE_CHANNEL_BROADCAST_DATA |
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self.channel = raw[0] |
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self._content = raw[1:9] |
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if len(raw) > 9: # Extended message |
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self.flag = raw[9] |
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self.extendedContent = raw[10:] |
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offset = 0 |
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if self.flag & EXT_FLAG_CHANNEL_ID: |
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self.deviceNumber = int.from_bytes(self.extendedContent[:2], byteorder='little', signed=False) |
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self.deviceType = self.extendedContent[2] |
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self.transType = self.extendedContent[3] |
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offset += 4 |
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if self.flag & EXT_FLAG_RSSI: |
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rssi = self.extendedContent[offset:(offset + 3)] |
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self.rssiMeasurementType = rssi[0] |
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self.rssi = rssi[1] |
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self.rssiThreshold = rssi[2] |
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offset += 3 |
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if self.flag & EXT_FLAG_TIMESTAMP: |
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self.rxTimestamp = int.from_bytes(self.extendedContent[offset:], |
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byteorder='little', signed=False) |
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return self |
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def checksum(self) -> int: |
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pass |
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def encode(self) -> bytes: |
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pass |
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class SystemResetMessage(Message): |
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def __init__(self): |
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super().__init__(MESSAGE_SYSTEM_RESET, b'0') |
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class SetNetworkKeyMessage(Message): |
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def __init__(self, channel: int, key: bytes = ANTPLUS_NETWORK_KEY): |
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content = bytearray([channel]) |
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content.extend(key) |
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super().__init__(MESSAGE_NETWORK_KEY, bytes(content)) |
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class AssignChannelMessage(Message): |
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def __init__(self, channel: int, type: int, network: int = 0, extended: int = None): |
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content = bytearray([channel, type, network]) |
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if extended is not None: |
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content.append(extended) |
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super().__init__(MESSAGE_CHANNEL_ASSIGN, bytes(content)) |
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class SetChannelIdMessage(Message): |
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def __init__(self, channel: int, deviceNumber: int = 0, deviceType: int = 0, transType: int = 0): |
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content = bytearray([channel]) |
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content.extend(deviceNumber.to_bytes(2, byteorder='big')) |
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content.append(deviceType) |
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content.append(transType) |
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super().__init__(MESSAGE_CHANNEL_ID, bytes(content)) |
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111
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112
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class SetChannelRfFrequencyMessage(Message): |
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def __init__(self, channel: int, frequency: int = 2457): |
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content = bytes([channel, frequency - 2400]) |
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super().__init__(MESSAGE_CHANNEL_FREQUENCY, content) |
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class OpenRxScanModeMessage(Message): |
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def __init__(self): |
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super().__init__(OPEN_RX_SCAN_MODE, bytes([0])) |
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122
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123
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class EnableExtendedMessagesMessage(Message): |
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def __init__(self, enable: bool = True): |
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content = bytes([0, int(enable)]) |
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super().__init__(MESSAGE_ENABLE_EXT_RX_MESSAGES, content) |
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127
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128
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129
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class LibConfigMessage(Message): |
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def __init__(self, rxTimestamp: bool = True, rssi: bool = True, channelId: bool = True): |
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config = 0 |
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if rxTimestamp: |
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config |= EXT_FLAG_TIMESTAMP |
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if rssi: |
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config |= EXT_FLAG_RSSI |
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if channelId: |
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config |= EXT_FLAG_CHANNEL_ID |
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super().__init__(MESSAGE_LIB_CONFIG, bytes([0, config])) |
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half2me /
libant
