73 lines
2.7 KiB
Python
73 lines
2.7 KiB
Python
# command_37_38.py
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import struct
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import logging
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import time
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class Command3738:
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def build_37h_request(self, pile_id, billing_template):
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"""
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下发计费模版请求
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:param pile_id: 8字节桩号
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:param billing_template: 计费模版列表，格式 [(time_minutes, price_per_minute, total_seconds, total_cost), ...]
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"""
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frame = bytearray([0x4A, 0x58, 0x37]) # 帧头 + 命令
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frame.extend(pile_id) # 桩号
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frame.append(0x01) # 数据加密方式（不加密）
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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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time_bytes = bytearray([
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current_time.tm_year - 2000,
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current_time.tm_mon,
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current_time.tm_mday,
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current_time.tm_hour,
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current_time.tm_min,
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current_time.tm_sec
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])
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data.extend(time_bytes)
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data.extend(b'\x1D\x00\x00\x00\x00\x00') # 未知字段，参考日志
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# 计费模版数据
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for entry in billing_template:
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time_minutes, price_per_minute, total_seconds, total_cost = entry
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data.extend(struct.pack('<H', time_minutes)) # 时间段（分钟）
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data.extend(struct.pack('<H', price_per_minute)) # 单价（分/分钟）
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data.extend(struct.pack('<I', total_seconds)) # 累计时间（秒）
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data.extend(struct.pack('<I', total_cost)) # 累计金额（分）
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frame.extend(struct.pack('<H', len(data))) # 数据域长度
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frame.extend(data)
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# 计算校验码
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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 parse_38h_response(self, data):
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if len(data) < 14:
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logging.warning("38H数据长度不足")
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return
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pile_id = data[3:11]
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data_start = 14
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data_len = struct.unpack('<H', data[12:14])[0]
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data_end = data_start + data_len
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if len(data) < data_end + 1:
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logging.warning("38H数据域长度不匹配")
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return
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timestamp = data[data_start:data_start + 6]
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unknown_field = data[data_start + 6:data_start + 8]
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result = struct.unpack('<H', data[data_start + 8:data_start + 10])[0]
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parsed_data = {
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"pile_id": pile_id.hex().upper(),
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"timestamp": f"20{timestamp[0]:02X}-{timestamp[1]:02X}-{timestamp[2]:02X} {timestamp[3]:02X}:{timestamp[4]:02X}:{timestamp[5]:02X}",
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"unknown_field": unknown_field.hex().upper(),
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"result": "Success" if result == 0x0100 else "Failed",
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"result_code": f"0x{result:04X}"
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}
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logging.info(f"38H计费模版下发结果: {parsed_data}") |