avr: cleanup structure of graphics apps and gui2.

avr/modules/lcd2/gui2/generic/rootwidget.asm

@@ -0,0 +1,56 @@
+; ***************************************************************************
+; copyright   : (C) 2026 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_GUI2_ROOTWIDGET_ASM
+#define AQH_AVR_GUI2_ROOTWIDGET_ASM
+
+
+; ***************************************************************************
+; defines
+
+; RootWidget in flash
+.equ ROOTWIDGET_OFFS_BEGIN      =  WIDGET_SIZE
+.equ ROOTWIDGET_OFFS_APP_LO     =  ROOTWIDGET_OFFS_BEGIN+0
+.equ ROOTWIDGET_OFFS_APP_HI     =  ROOTWIDGET_OFFS_BEGIN+1
+.equ ROOTWIDGET_SIZE            =  ROOTWIDGET_OFFS_BEGIN+2
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; @routine RootWidget_GetApp @global
+;
+; @param  Z       byte address of object (for LPM!)
+; @return R19:R18 byte address pointer to GuiApp
+; @clobbers none
+
+RootWidget_GetApp:
+  bigcall OBJ_IsObject              ; (none)
+  brcc RootWidget_GetApp_ret
+  adiw zh:zl, ROOTWIDGET_OFFS_APP_LO
+  lpm r18, Z+
+  lpm r19, Z
+  sbiw zh:zl, ROOTWIDGET_OFFS_APP_LO+1
+  sec
+RootWidget_GetApp_ret:
+  ret
+; @end
+
+
+
+#endif
+
+
+