首次提交完整的python工程代码

structure/a_frame.py

@@ -0,0 +1,37 @@
+import struct
+
+class AFrame:
+    def __init__(self, data: bytes):
+        self.valid = False
+        self.data_id = 0
+        self.data_len = 0
+        self.payload = b""
+
+        # A帧最小长度: 4+4+4+4+4+4 + 8 + 2 = 34
+        if len(data) < 34:
+            return
+
+        try:
+            # 大端解包
+            magic, dlen, dir_, data_id, ptype, sat = struct.unpack('>IIIIII', data[:24])
+            payload = data[24:-2]
+            tail = data[-2:]
+
+            if magic != 0xEB90EB90 or tail != 0x4C3A.to_bytes(2, 'big'):
+                return
+
+            self.valid = True
+            self.data_id = data_id
+            self.data_len = dlen
+            self.payload = payload
+        except:
+            pass
+
+    def get_doubles(self):
+        doubles = []
+        buf = self.payload
+        while len(buf) >= 8:
+            d = struct.unpack('>d', buf[:8])[0]
+            doubles.append(d)
+            buf = buf[8:]
+        return doubles