avr: bootloader works with new com2w code.

avr/modules/flash/io_stub.asm

@@ -0,0 +1,60 @@
+; ***************************************************************************
+; copyright   : (C) 2025 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ioRawInit
+;
+; Init raw message subsystem.
+;
+
+ioRawInit:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ioRawSendMsg
+;
+; Send a message
+;
+
+ioRawSendMsg:
+  ret
+; @end
+
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ioRawWaitForValidMsg
+;
+; Wait for valid incoming msg
+;
+; @return CFLAG set if okay (packet received), cleared on error
+
+ioRawWaitForValidMsg:
+  ret
+; @end
+
+
+
+
+
+
+