首次提交完整的python工程代码

protocol/a_frame.py

@@ -0,0 +1,35 @@
+import struct
+
+class AFrame:
+    def __init__(self, data: bytes):
+        self.valid = False
+        self.data_id = 0
+        self.payload = b""
+        self.values = []
+
+        if len(data) < 24 + 8 + 2:
+            return
+
+        try:
+            magic, dlen, dir_, data_id, ptype, sat = struct.unpack('>IIIIII', data[:24])
+            payload = data[24:-2]
+            tail = data[-2:]
+
+            if magic != 0xEB90EB90 or tail != b'\x4C\x3A':
+                return
+
+            self.valid = True
+            self.data_id = data_id
+            self.payload = payload
+
+            # 按8字节切分double
+            vs = []
+            buf = payload
+            while len(buf) >= 8:
+                v = struct.unpack('>d', buf[:8])[0]
+                vs.append(v)
+                buf = buf[8:]
+            self.values = vs
+
+        except:
+            pass