86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
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"""
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模拟L1发送UDP报文的测试脚本
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用法: python tests/test_udp_sender.py
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"""
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import socket
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import struct
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import time
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HOST = "127.0.0.1"
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PORT = 9000
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MAGIC = b'\xAA\xBB'
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def checksum(body: bytes) -> int:
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return sum(body) & 0xFFFF
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def build_frame(msg_type: str, body_str: str, seq: int) -> bytes:
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body = body_str.encode("gbk")
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hdr = MAGIC
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hdr += msg_type.encode("ascii").ljust(4)[:4]
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hdr += struct.pack(">H", seq)
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hdr += struct.pack(">H", len(body))
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hdr += struct.pack(">H", checksum(body))
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return hdr + body
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def send(sock: socket.socket, frame: bytes):
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sock.sendto(frame, (HOST, PORT))
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try:
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sock.settimeout(2)
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ack, addr = sock.recvfrom(64)
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print(f" ACK收到: {ack[:12].hex()}")
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except socket.timeout:
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print(" 未收到ACK（超时）")
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if __name__ == "__main__":
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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# PC20 心跳
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print("发送 PC20 心跳...")
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send(sock, build_frame("PC20", "20240101120000", seq=1))
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time.sleep(0.2)
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# PC01 卷材入口
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print("发送 PC01 卷材入口...")
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body = (
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"HA123456789012345678" # 卷号 20B
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"SPHC " # 钢种 10B
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" 2.500" # 厚度 6B
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"1250.0" # 宽度 6B
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" 18500.0" # 重量 8B
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"甲" # 班次 2B
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)
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send(sock, build_frame("PC01", body, seq=2))
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time.sleep(0.2)
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# PC03 过程数据
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print("发送 PC03 过程数据...")
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body = (
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"HA123456789012345678" # 卷号 20B
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"酸洗槽1 " # 位置 10B
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" 80.5" # 速度 6B
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" 5200.0" # 入口张力 8B
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" 4800.0" # 出口张力 8B
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" 62.3" # 酸液温度 6B
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)
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send(sock, build_frame("PC03", body, seq=3))
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time.sleep(0.2)
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# PC02 卷材出口
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print("发送 PC02 卷材出口...")
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body = (
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"HA123456789012345678" # 卷号 20B
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" 2.498" # 实测厚度 6B
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"1249.5" # 实测宽度 6B
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" 1850.00" # 处理长度 8B
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" 78.3" # 平均速度 6B
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"A1" # 质量等级 2B
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)
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send(sock, build_frame("PC02", body, seq=4))
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sock.close()
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print("测试完成")
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