first commit

报文模拟解析/test1.py

@@ -0,0 +1,52 @@
+import struct
+
+def create_demod_info_packet():
+    """创建解调信息报文(类型12)的内容"""
+    # 模拟解调信息数据
+    message_type = 12             # 消息类型 (1字节)
+    satellite_id = 1               # 卫星ID (1字节)
+    demodulator_id = 0             # 解调器编号 (1字节)
+    demod_slot = 1234              # 解调时隙 (2字节)
+    receive_delay = 5678           # 接收延迟 (2字节，单位us)
+    snr = 25.75                    # 信噪比 (2字节，dB)
+    
+    # 处理信噪比 (高8位整数部分，低8位小数部分)
+    snr_int = int(snr)
+    snr_frac = int((snr - snr_int) * 100)  # 转换为0-99的小数部分
+    snr_packed = (snr_int & 0xFF) << 8 | (snr_frac & 0xFF)
+    
+    # 打包为二进制 (大端字节序)
+    content = struct.pack(
+        '>BBBHHH',  # 格式: B(1),B(1),B(1),H(2),H(2),h(2)
+        message_type,
+        satellite_id,
+        demodulator_id,
+        demod_slot,
+        receive_delay,
+        snr_packed
+    )
+    return content
+
+def create_tcp_packet(packet_type, content):
+    """创建符合VDES TCP协议的报文"""
+    # 报文帧头 (4字节)
+    header = b'####'
+    
+    # 报文类型 (4字节，大端)
+    type_field = struct.pack('>I', packet_type)
+    
+    # 报文长度 (4字节，大端，内容长度)
+    length = len(content)
+    length_field = struct.pack('>I', length)
+    
+    # 构建完整报文
+    packet = header + type_field + length_field + content
+    return packet
+
+
+
+# 使用示例
+demod_info_content = create_demod_info_packet()
+demod_info_packet = create_tcp_packet(12, demod_info_content)
+
+# 打印结果