53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
import time
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import struct
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import logging
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class Command04:
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def __init__(self):
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self.pile_id = b"\x00\x27\x02\x12\x34\x56\x12\x34" # 示例桩号
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def build_04h_disconnect(self, pile_id, reason=0x00):
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"""构建04H断开连接帧"""
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frame = bytearray([0x4A, 0x58]) # 帧头: "JX"
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frame.append(0x04) # 命令码: 04H
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frame.extend(pile_id) # 桩号 (8字节)
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frame.append(0x01) # 数据加密方式: 0x01 (不加密)
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frame.extend([0x00, 0x00]) # 数据域长度 (初始为0，后续更新)
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# 数据域
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data = bytearray()
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current_time = time.localtime()
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data.extend([
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current_time.tm_year - 2000, current_time.tm_mon, current_time.tm_mday,
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current_time.tm_hour, current_time.tm_min, current_time.tm_sec
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]) # 时间标识 (6字节)
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data.append(reason) # 断开原因 (0x00: 正常断开)
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frame.extend(data)
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struct.pack_into(">H", frame, 12, len(data)) # 更新数据域长度
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# 校验码
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checksum = 0
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for b in frame[2:-1]:
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checksum ^= b
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frame.append(checksum)
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return frame
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def process_04h(self, data):
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"""处理04H断开连接（由接收方调用）"""
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if data and len(data) >= 20 and data[2] == 0x04:
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pile_id = data[3:11]
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reason = data[20]
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logging.info(f"接收到断开请求，桩号: {pile_id.hex().upper()}，原因: {reason:02X}")
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return True
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logging.warning("无效的04H数据")
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return False
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if __name__ == "__main__":
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logging.basicConfig(level=logging.INFO)
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cmd = Command04()
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frame = cmd.build_04h_disconnect(b"\x00\x27\x02\x12\x34\x56\x12\x34")
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print(f"04H断开帧: {frame.hex().upper()}") |