Changed socket.__exit__() to use hardware interrupt register.

Author: BiffoBear

adafruit_wiznet5k/adafruit_wiznet5k.py

@@ -105,9 +105,9 @@
 
 # Socket n Interrupt Register
 _SNIR_SEND_OK = const(0x10)
-_SNIR_TIMEOUT = const(0x08)
+SNIR_TIMEOUT = const(0x08)
 _SNIR_RECV = const(0x04)
-_SNIR_DISCON = const(0x02)
+SNIR_DISCON = const(0x02)
 _SNIR_CON = const(0x01)
 
 _CH_SIZE = const(0x100)
@@ -837,7 +837,7 @@ def socket_open(self, socket_num: int, conn_mode: int = _SNMR_TCP) -> int:
             time.sleep(0.00025)
 
             self._write_snmr(socket_num, conn_mode)
-            self._write_snir(socket_num, 0xFF)
+            self.write_snir(socket_num, 0xFF)
 
             if self.src_port > 0:
                 # write to socket source port
@@ -1058,7 +1058,7 @@ def socket_write(
                 return 0
             time.sleep(0.01)
 
-        self._write_snir(socket_num, _SNIR_SEND_OK)
+        self.write_snir(socket_num, _SNIR_SEND_OK)
         return ret
 
     # Socket-Register Methods
@@ -1124,11 +1124,15 @@ def _read_snsr(self, sock: int) -> Optional[bytearray]:
         """Read Socket n Status Register."""
         return self._read_socket(sock, _REG_SNSR)
 
+    def read_snir(self, sock: int) -> Optional[bytearray]:
+        """Read Socket n Status Register."""
+        return self._read_socket(sock, _REG_SNIR)
+
     def _write_snmr(self, sock: int, protocol: int) -> None:
         """Write to Socket n Mode Register."""
         self._write_socket(sock, _REG_SNMR, protocol)
 
-    def _write_snir(self, sock: int, data: int) -> None:
+    def write_snir(self, sock: int, data: int) -> None:
         """Write to Socket n Interrupt Register."""
         self._write_socket(sock, _REG_SNIR, data)
 

adafruit_wiznet5k/adafruit_wiznet5k_socket.py

@@ -240,16 +240,25 @@ def __enter__(self):
 
     def __exit__(self, exc_type, exc_val, exc_tb) -> None:
         if self._sock_type == SOCK_STREAM:
-            self._disconnect()
-            stamp = time.monotonic()
-            while self._status == wiznet5k.adafruit_wiznet5k.SNSR_SOCK_FIN_WAIT:
-                if time.monotonic() - stamp > 19:  # Hardware default timeout.
-                    raise RuntimeError("Failed to disconnect socket")
-        self.close()
-        stamp = time.monotonic()
-        while self._status != wiznet5k.adafruit_wiznet5k.SNSR_SOCK_CLOSED:
-            if time.monotonic() - stamp > 19:  # Hardware default timeout.
-                raise RuntimeError("Failed to close socket")
+            _the_interface.write_snir(
+                self._socknum, 0xFF
+            )  # Reset socket interrupt register.
+            _the_interface.socket_disconnect(self._socknum)
+            mask = (
+                wiznet5k.adafruit_wiznet5k.SNIR_TIMEOUT
+                | wiznet5k.adafruit_wiznet5k.SNIR_DISCON
+            )
+            while not _the_interface.read_snir(self._socknum)[0] & mask:
+                pass
+        _the_interface.write_snir(
+            self._socknum, 0xFF
+        )  # Reset socket interrupt register.
+        _the_interface.socket_close(self._socknum)
+        while (
+            not _the_interface.socket_status(self._socknum)[0]
+            & wiznet5k.adafruit_wiznet5k.SNSR_SOCK_CLOSED
+        ):
+            pass
 
     @property
     def _status(self) -> int: