Add DFU tool

pycoax/coax/serial_interface.py

@@ -76,6 +76,16 @@ class SerialInterface(Interface):
 
         return _unpack_receive_data(message[1:])
 
+    def enter_dfu_mode(self):
+        message = bytes([0xf2])
+
+        self._write_message(message)
+
+        message = self._read_message()
+
+        if message[0] != 0x01:
+            raise _convert_error(message)
+
     def _calculate_timeout_milliseconds(self, timeout):
         milliseconds = 0
 

pycoax/coax/tools/dfu.py

@@ -0,0 +1,21 @@
+import time
+import argparse
+from coax import open_serial_interface
+
+def main():
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument('serial_port', help='Serial port')
+
+    args = parser.parse_args()
+
+    with open_serial_interface(args.serial_port) as interface:
+        interface.enter_dfu_mode()
+
+        # Wait for the interface to restart in DFU mode.
+        time.sleep(3)
+
+        print('Interface should now be in DFU mode...')
+
+if __name__ == '__main__':
+    main()