From f6e852be74545a8bc1cf6f05fc4ee9fa2d73b973 Mon Sep 17 00:00:00 2001
From: Martin Preuss <martin@aquamaniac.de>
Date: Mon, 17 Nov 2025 23:03:56 +0100
Subject: [PATCH] started working on static gui

---
 avr/modules/lcd2/staticgui/0BUILD          |  16 +
 avr/modules/lcd2/staticgui/TODO            |  13 +
 avr/modules/lcd2/staticgui/defs.asm        |  65 +++
 avr/modules/lcd2/staticgui/dialog.asm      | 288 ++++++++++++
 avr/modules/lcd2/staticgui/main.asm        |  27 ++
 avr/modules/lcd2/staticgui/style.asm       |  24 +
 avr/modules/lcd2/staticgui/titlewindow.asm | 158 +++++++
 avr/modules/lcd2/staticgui/window.asm      | 512 +++++++++++++++++++++
 8 files changed, 1103 insertions(+)
 create mode 100644 avr/modules/lcd2/staticgui/0BUILD
 create mode 100644 avr/modules/lcd2/staticgui/TODO
 create mode 100644 avr/modules/lcd2/staticgui/defs.asm
 create mode 100644 avr/modules/lcd2/staticgui/dialog.asm
 create mode 100644 avr/modules/lcd2/staticgui/main.asm
 create mode 100644 avr/modules/lcd2/staticgui/style.asm
 create mode 100644 avr/modules/lcd2/staticgui/titlewindow.asm
 create mode 100644 avr/modules/lcd2/staticgui/window.asm

diff --git a/avr/modules/lcd2/staticgui/0BUILD b/avr/modules/lcd2/staticgui/0BUILD
new file mode 100644
index 0000000..7ad68a8
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/0BUILD
@@ -0,0 +1,16 @@
+<?xml?>
+
+<gwbuild>
+
+  <extradist>
+    defs.asm
+    dialog.asm
+    main.asm
+    style.asm
+    titlewindow.asm
+    window.asm
+  </extradist>
+
+</gwbuild>
+
+
diff --git a/avr/modules/lcd2/staticgui/TODO b/avr/modules/lcd2/staticgui/TODO
new file mode 100644
index 0000000..898a149
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/TODO
@@ -0,0 +1,13 @@
+
+
+- Screen
+  - functions:
+    - show
+    - unshow
+    - touch
+    - key
+  - activeAreas:
+    - x, y, w, h (in FLASH)
+  - only small variable data in SRAM, no need for heap!
+
+
diff --git a/avr/modules/lcd2/staticgui/defs.asm b/avr/modules/lcd2/staticgui/defs.asm
new file mode 100644
index 0000000..0ea9fcd
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/defs.asm
@@ -0,0 +1,65 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_STATICGUI_DEFS_ASM
+#define AQH_AVR_STATICGUI_DEFS_ASM
+
+
+; all offsets in byte size (to be used with LPM)
+.equ WIN_F_OFFS_X_LO       =  0
+.equ WIN_F_OFFS_X_HI       =  1
+.equ WIN_F_OFFS_Y_LO       =  2
+.equ WIN_F_OFFS_Y_HI       =  3
+.equ WIN_F_OFFS_WIDTH_LO   =  4
+.equ WIN_F_OFFS_WIDTH_HI   =  5
+.equ WIN_F_OFFS_HEIGHT_LO  =  6
+.equ WIN_F_OFFS_HEIGHT_HI  =  7
+.equ WIN_F_SIZE            =  8
+
+.equ COLORWIN_F_OFFS_WIN         = WIN_F_SIZE
+.equ COLORWIN_F_OFFS_BG_COLOR_LO = WIN_F_SIZE
+.equ COLORWIN_F_OFFS_BG_COLOR_HI = WIN_F_SIZE+1
+.equ COLORWIN_F_OFFS_FG_COLOR_LO = WIN_F_SIZE+2
+.equ COLORWIN_F_OFFS_FG_COLOR_HI = WIN_F_SIZE+3
+.equ COLORWIN_F_SIZE             = WIN_F_SIZE+4
+
+.equ TEXTWIN_F_OFFS_WIN         = COLORWIN_F_SIZE
+.equ TEXTWIN_F_OFFS_FONT_LO     = COLORWIN_F_SIZE
+.equ TEXTWIN_F_OFFS_FONT_HI     = COLORWIN_F_SIZE+1
+.equ TEXTWIN_F_SIZE             = COLORWIN_F_SIZE+2
+
+
+
+.equ WIN_OFFS_X_LO       =  0
+.equ WIN_OFFS_X_HI       =  1
+.equ WIN_OFFS_Y_LO       =  2
+.equ WIN_OFFS_Y_HI       =  3
+.equ WIN_OFFS_WIDTH_LO   =  4
+.equ WIN_OFFS_WIDTH_HI   =  5
+.equ WIN_OFFS_HEIGHT_LO  =  6
+.equ WIN_OFFS_HEIGHT_HI  =  7
+.equ WIN_OFFS_BG_COL_LO  =  8
+.equ WIN_OFFS_BG_COL_HI  =  9
+.equ WIN_OFFS_FG_COL_LO  = 10
+.equ WIN_OFFS_FG_COL_HI  = 11
+.equ WIN_OFFS_FONT_LO    = 12  ;byte address!
+.equ WIN_OFFS_FONT_HI    = 13
+.equ WIN_SIZE            = 14
+
+
+
+.equ WIN_EVENT_DESTROY   = 1
+.equ WIN_EVENT_SHOW      = 2
+.equ WIN_EVENT_HIDE      = 3
+.equ WIN_EVENT_DRAW      = 4
+.equ WIN_EVENT_TIMER     = 5
+
+
+#endif ; AQH_AVR_STATICGUI_DEFS_ASM
+
diff --git a/avr/modules/lcd2/staticgui/dialog.asm b/avr/modules/lcd2/staticgui/dialog.asm
new file mode 100644
index 0000000..a865699
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/dialog.asm
@@ -0,0 +1,288 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+#ifndef AQHOME_AVR_MODS_STATICGUI_DIALOG_ASM
+#define AQHOME_AVR_MODS_STATICGUI_DIALOG_ASM
+
+
+
+; ***************************************************************************
+; defines
+
+.equ DIALOG_MAX_ACTIVE      = 8
+
+.equ DIALOG_OFFS_HANDLER_LO = 0
+.equ DIALOG_OFFS_HANDLER_HI = 1
+.equ DIALOG_OFFS_OPTIONS    = 2
+.equ DIALOG_OFFS_COUNTER    = 3
+.equ DIALOG_SIZE            = 4
+
+
+.equ DIALOG_OPT_ACTIVE_BIT  = 7
+
+
+.equ DIALOG_FN_INIT  = 0
+.equ DIALOG_FN_FINI  = 1
+.equ DIALOG_FN_SHOW  = 2
+.equ DIALOG_FN_HIDE  = 3
+.equ DIALOG_FN_DRAW  = 4
+.equ DIALOG_FN_TOUCH = 5
+.equ DIALOG_FN_TIMER = 6
+
+
+
+; ***************************************************************************
+; data
+
+.dseg
+
+dialogCurrent:  .byte 2
+dialogStack:    .byte DIALOG_MAX_ACTIVE*2
+dialogStackPos: .byte 1
+
+dialogWindow:   .byte WIN_SIZE
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+; ---------------------------------------------------------------------------
+; @routine GraphApp_Init @global
+;
+
+DialogMgr_Init:
+  clr r16
+  sts dialogStackPos, r16
+  sts dialogCurrent, r16
+  sts dialogCurrent+1, r16
+  
+  ldi yl, LOW(dialogWindow)
+  ldi yh, HIGH(dialogWindow)
+  bigcall TitleWindow_Init
+
+  ldi zl, LOW(ili9341Font12x20_1*2)
+  ldi zh, HIGH(ili9341Font12x20_1*2)
+  std Y+WIN_OFFS_FONT_LO, zl
+  std Y+WIN_OFFS_FONT_HI, zh
+  
+  bigcall TitleWindow_SetFullSize  
+  bigcall TitleWindow_SetStyleColors
+
+  bigcall Window_Clear
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine DialogMgr_Every100ms @global
+;
+; Handle display touch events
+; Send timer event to every app in the stack (started with last added app).
+
+DialogMgr_Every100ms:
+  ; check for touch input changes
+  rcall Display_InputGetState    ; r16=flags, r5:r4=x, r7:r6=y
+  mov r17, r16
+  andi r17, (1<<DISPLAY_IFLAGS_CHGCOORD_BIT) | (1<<DISPLAY_IFLAGS_CHGPRESS_BIT)
+  breq DialogMgr_Every100ms_sendTimer
+  ldi r23, DIALOG_FN_TOUCH
+  rcall DialogMgr_CallCurrentHandler
+DialogMgr_Every100ms_sendTimer:
+  ; send timer event to all dialogs in stack
+  ldi xl, LOW(dialogStack)
+  ldi xh, HIGH(dialogStack)
+
+  lds r16, dialogStackPos
+  mov r17, r16
+  add r16, r16
+  add xl, r16
+  adc xh, r16
+  sub xh, r16
+
+DialogMgr_Every100ms_loop:
+    tst r17
+    breq DialogMgr_Every100ms_ret
+    ld yh, -X
+    ld yl, -X
+    push xl
+      push xh
+        push r17
+          ldi r23, DIALOG_FN_TIMER
+          rcall DialogMgr_CallHandler
+        pop r17
+      pop xh
+    pop xl
+    dec r17
+  rjmp DialogMgr_Every100ms_loop
+DialogMgr_Every100ms_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine DialogMgr_CallHandler @global
+;
+; @param Y   pointer to app data
+; @param R23 number of function to call
+; @clobbers R16, R17, R22, X (any)
+
+DialogMgr_CallHandler:
+  ldi xl, LOW(dialogWindow)
+  ldi xh, HIGH(dialogWindow)
+  ldd r16, Y+DIALOG_OFFS_HANDLER_LO
+  ldd r17, Y+DIALOG_OFFS_HANDLER_HI
+  mov r22, r16
+  and r22, r17
+  breq DialogMgr_CallHandler_ret
+  push r16
+  push r17
+DialogMgr_CallHandler_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine DialogMgr_CallCurrentHandler @global
+;
+; @param X   pointer to window
+; @param R23 number of function to call
+; @clobbers R22 (any)
+
+DialogMgr_CallCurrentHandler:
+  lds yl, dialogCurrent
+  lds yh, dialogCurrent+1
+  rjmp DialogMgr_CallHandler
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine DialogMgr_PushDialog @global
+;
+; @param Y   pointer to app data
+;
+DialogMgr_PushDialog:
+  lds r16, dialogStackPos
+  cpi r16, DIALOG_MAX_ACTIVE
+  brcc DialogMgr_PushDialog_ret
+  
+  tst r16
+  brne DialogMgr_PushDialog_push
+  ; deactivate previous app
+  push yl
+    push yh
+      lds yl, dialogCurrent
+      lds yh, dialogCurrent+1
+      ldi r23, DIALOG_FN_HIDE
+      rcall DialogMgr_CallHandler
+      ldd r17, Y+DIALOG_OFFS_OPTIONS
+      cbr r17, (1<<DIALOG_OPT_ACTIVE_BIT)
+      std Y+DIALOG_OFFS_OPTIONS, r17
+    pop yh
+  pop yl
+
+DialogMgr_PushDialog_push:
+  lds r16, dialogStackPos
+  add r17, r17 ; *2
+  push xl
+    push xh
+      ldi xl, LOW(dialogStack)
+      ldi xh, HIGH(dialogStack)
+      add xl, r17
+      adc xh, r17
+      sub xh, r17
+      st X+, yl
+      st X, yh
+    pop xh
+  pop xl
+  inc r16
+  sts dialogStackPos, r16
+  ; activate new app
+  ldd r17, Y+DIALOG_OFFS_OPTIONS
+  ori r17, (1<<DIALOG_OPT_ACTIVE_BIT)
+  std Y+DIALOG_OFFS_OPTIONS, r17
+  ldi r23, DIALOG_FN_SHOW
+  rcall DialogMgr_CallHandler
+  sec
+DialogMgr_PushDialog_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine DialogMgr_PopDialog @global
+;
+; @return CFLAG set if app popped from stack, cleared otherwise
+; @return Y app popped from stack (if CFLAG set)
+
+DialogMgr_PopDialog:
+  lds r16, dialogStackPos
+  tst r16
+  clc
+  brne DialogMgr_PopDialog_ret
+  ; deactivate previous app
+  push yl
+    push yh
+      lds yl, dialogCurrent
+      lds yh, dialogCurrent+1
+      ldi r23, DIALOG_FN_HIDE
+      rcall DialogMgr_CallHandler
+      ldd r17, Y+DIALOG_OFFS_OPTIONS
+      cbr r17, (1<<DIALOG_OPT_ACTIVE_BIT)
+      std Y+DIALOG_OFFS_OPTIONS, r17
+    pop yh
+  pop yl
+
+  lds r16, dialogStackPos
+  dec r16
+  sts dialogStackPos, r16
+  brne DialogMgr_PopDialog_pop
+  clr r16
+  sts dialogCurrent, r16
+  sts dialogCurrent+1, r16
+  sec
+  rjmp DialogMgr_PopDialog_ret
+DialogMgr_PopDialog_pop:
+  push xl
+    push xh
+      ldi xl, LOW(dialogStack)
+      ldi xh, HIGH(dialogStack)
+      add xl, r16
+      adc xh, r16
+      sub xh, r16
+      ld yl, X+
+      ld yh, X
+      sts dialogCurrent, yl
+      sts dialogCurrent+1, yh
+    pop xh
+  pop xl
+  ; activate new active app
+  ldd r17, Y+DIALOG_OFFS_OPTIONS
+  ori r17, (1<<DIALOG_OPT_ACTIVE_BIT)
+  std Y+DIALOG_OFFS_OPTIONS, r17
+  ldi r23, DIALOG_FN_SHOW
+  rcall DialogMgr_CallHandler
+  sec
+DialogMgr_PopDialog_ret:
+  ret
+; @end
+
+
+
+
+#endif ; AQHOME_AVR_MODS_STATICGUI_DIALOG_ASM
+
diff --git a/avr/modules/lcd2/staticgui/main.asm b/avr/modules/lcd2/staticgui/main.asm
new file mode 100644
index 0000000..e26cea6
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/main.asm
@@ -0,0 +1,27 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_STATICGUI_MAIN_ASM
+#define AQH_AVR_STATICGUI_MAIN_ASM
+
+
+GUI_Init:
+  sec
+  ret
+; @end
+
+
+
+GUI_Every100ms:
+  ret
+; @end
+
+
+
+#endif ; AQH_AVR_STATICGUI_MAIN_ASM
diff --git a/avr/modules/lcd2/staticgui/style.asm b/avr/modules/lcd2/staticgui/style.asm
new file mode 100644
index 0000000..f0a2016
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/style.asm
@@ -0,0 +1,24 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_STATICGUI_STYLE_ASM
+#define AQH_AVR_STATICGUI_STYLE_ASM
+
+
+.equ STYLE_WIN_TITLE_BACKGROUND = DISPLAY_COLOR_NAVY
+.equ STYLE_WIN_TITLE_FOREGROUND = DISPLAY_COLOR_WHITE
+.equ STYLE_WIN_BACKGROUND       = DISPLAY_COLOR_LIGHTGREY
+.equ STYLE_WIN_FOREGROUND       = DISPLAY_COLOR_BLACK
+.equ STYLE_WIN_FONT             = ili9341Font12x20_1
+
+.equ STYLE_WIN_TITLE_HEIGHT     = 24
+
+
+#endif ; AQH_AVR_STATICGUI_STYLE_ASM
+
diff --git a/avr/modules/lcd2/staticgui/titlewindow.asm b/avr/modules/lcd2/staticgui/titlewindow.asm
new file mode 100644
index 0000000..9aef9ec
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/titlewindow.asm
@@ -0,0 +1,158 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_STATICGUI_TITLEWINDOW_ASM
+#define AQH_AVR_STATICGUI_TITLEWINDOW_ASM
+
+
+.cseg
+
+
+; ---------------------------------------------------------------------------
+; @routine TitleWindow_Init @global
+;
+; @param Y pointer to titledwindow data (size=TITLEWINDOW_SIZE)
+
+TitleWindow_Init:
+  bigcall Window_Init
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine TitleWindow_SetFullSize @global
+;
+; @param Y pointer to screen object in SDRAM
+; @clobbers any, !Y
+
+TitleWindow_SetFullSize:
+  clr r16
+  std Y+WIN_OFFS_X_LO, r16
+  std Y+WIN_OFFS_X_HI, r16
+  std Y+WIN_OFFS_Y_LO, r16
+  std Y+WIN_OFFS_Y_HI, r16
+  
+  ldi r16, LOW(DISPLAY_WIDTH)
+  std Y+WIN_OFFS_WIDTH_LO, r16
+  ldi r16, HIGH(DISPLAY_WIDTH)
+  std Y+WIN_OFFS_WIDTH_HI, r16
+  
+  ldi r16, LOW(DISPLAY_HEIGHT)
+  std Y+WIN_OFFS_HEIGHT_LO, r16
+  ldi r16, HIGH(DISPLAY_HEIGHT)
+  std Y+WIN_OFFS_HEIGHT_HI, r16
+
+  ret
+; @enb
+
+
+
+; ---------------------------------------------------------------------------
+; @routine TitleWindow_SetStyleColors @global
+;
+; @param Y pointer to screen object in SDRAM
+; @clobbers any, !Y
+
+TitleWindow_SetStyleColors:
+  ldi r16, LOW(STYLE_WIN_BACKGROUND)
+  ldi r17, HIGH(STYLE_WIN_BACKGROUND)
+  std Y+WIN_OFFS_BG_COL_LO, r16
+  std Y+WIN_OFFS_BG_COL_HI, r17
+  ldi r16, LOW(STYLE_WIN_FOREGROUND)
+  ldi r17, HIGH(STYLE_WIN_FOREGROUND)
+  std Y+WIN_OFFS_FG_COL_LO, r16
+  std Y+WIN_OFFS_FG_COL_HI, r17
+
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine TitleWindow_DrawTitle @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param Z pointer to title
+; @clobbers any, !Y
+
+TitleWindow_DrawTitle:
+  ; fill background of title area
+  clr r4
+  clr r5
+  clr r6
+  clr r7
+  ldd r8, Y+WIN_OFFS_WIDTH_LO
+  ldd r9, Y+WIN_OFFS_WIDTH_HI
+  ldi r16, LOW(STYLE_WIN_TITLE_HEIGHT)
+  ldi r17, HIGH(STYLE_WIN_TITLE_HEIGHT)
+  mov r10, r16
+  mov r11, r17
+  ldi r16, LOW(STYLE_WIN_TITLE_BACKGROUND)
+  mov r2, r16
+  ldi r16, HIGH(STYLE_WIN_TITLE_BACKGROUND)
+  mov r3, r16
+  rcall Window_FillRect
+
+  ; draw title
+  ldi r16, 5     ; X
+  mov r4, r16
+  clr r5
+  ldi r16, 2     ; Y
+  mov r6, r16
+  clr r7
+  
+  ldi r16, LOW(STYLE_WIN_TITLE_BACKGROUND)
+  mov r0, r16
+  ldi r16, HIGH(STYLE_WIN_TITLE_BACKGROUND)
+  mov r1, r16
+
+  ldi r16, LOW(STYLE_WIN_TITLE_FOREGROUND)
+  mov r2, r16
+  ldi r16, HIGH(STYLE_WIN_TITLE_FOREGROUND)
+  mov r3, r16
+  bigcall Window_DrawColorTextFlash
+
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine TitleWindow_ClearContentArea @global
+;
+; @param Y pointer to screen object in SDRAM
+; @clobbers any, !Y
+
+TitleWindow_ClearContentArea:
+  clr r4
+  clr r5
+  ldi r16, LOW(STYLE_WIN_TITLE_HEIGHT)
+  mov r6, r16
+  ldi r16, HIGH(STYLE_WIN_TITLE_HEIGHT)
+  mov r7, r16
+  ldd r8, Y+WIN_OFFS_WIDTH_LO
+  ldd r9, Y+WIN_OFFS_WIDTH_HI
+  ldi r16, LOW(STYLE_WIN_TITLE_HEIGHT)
+  ldi r17, HIGH(STYLE_WIN_TITLE_HEIGHT)
+  ldd r10, Y+WIN_OFFS_HEIGHT_LO
+  ldd r11, Y+WIN_OFFS_HEIGHT_HI
+  sub r10, r16
+  sbc r11, r17
+  ldi r16, LOW(STYLE_WIN_BACKGROUND)
+  ldd r2, Y+WIN_OFFS_BG_COL_LO
+  ldd r3, Y+WIN_OFFS_BG_COL_HI
+  rcall Window_FillRect
+  ret
+; @end
+
+
+
+#endif ; AQH_AVR_STATICGUI_TITLEWINDOW2_ASM
+
diff --git a/avr/modules/lcd2/staticgui/window.asm b/avr/modules/lcd2/staticgui/window.asm
new file mode 100644
index 0000000..3e8fdc0
--- /dev/null
+++ b/avr/modules/lcd2/staticgui/window.asm
@@ -0,0 +1,512 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_STATICGUI_WINDOW_ASM
+#define AQH_AVR_STATICGUI_WINDOW_ASM
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_Init @global
+;
+; @param Y pointer to screen object in SDRAM
+; @clobbers R16, R17, X
+
+Window_Init:
+  mov xl, yl
+  mov xh, yh
+  ldi r17, WIN_SIZE
+  clr r16
+  bigcall Utils_FillSram      ; (R17, X)
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_Clear @global
+;
+; @param Y pointer to screen object in SDRAM
+; @clobbers any, !Y
+
+Window_Clear:
+  ldd r2, Y+WIN_OFFS_BG_COL_LO  ; background color low
+  ldd r3, Y+WIN_OFFS_BG_COL_HI  ; background color high
+  ldd r4, Y+WIN_OFFS_X_LO       ; X low
+  ldd r5, Y+WIN_OFFS_X_HI       ; X high
+  ldd r6, Y+WIN_OFFS_Y_LO       ; Y low
+  ldd r7, Y+WIN_OFFS_Y_HI       ; Y high
+  ldd r8, Y+WIN_OFFS_WIDTH_LO   ; width low
+  ldd r9, Y+WIN_OFFS_WIDTH_HI   ; width high
+  ldd r10, Y+WIN_OFFS_HEIGHT_LO ; height low
+  ldd r11, Y+WIN_OFFS_HEIGHT_HI ; height high
+  bigcall Display_FillRect
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_FillRect @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param r3:r2 color
+; @param r5:r4   X0
+; @param r7:r6   Y0
+; @param r9:r8   X1/W
+; @param r11:r10 Y1/H
+; @clobbers any, !Y
+
+Window_FillRect:
+  ldd r16, Y+WIN_OFFS_X_LO  ; make absolute coords
+  ldd r17, Y+WIN_OFFS_X_HI
+  add r4, r16
+  adc r5, r17
+  ldd r16, Y+WIN_OFFS_Y_LO
+  ldd r17, Y+WIN_OFFS_Y_HI
+  add r6, r16
+  adc r7, r17
+  bigcall Display_FillRect ; directly call graphics function
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_DrawTextFlash @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return R5:R4   X pos behind string
+
+; @clobbers any, !Y, !R6, !R7
+
+Window_DrawTextFlash:
+  ldd r0, Y+WIN_OFFS_BG_COL_LO
+  ldd r1, Y+WIN_OFFS_BG_COL_HI
+  ldd r2, Y+WIN_OFFS_FG_COL_LO
+  ldd r3, Y+WIN_OFFS_FG_COL_HI
+
+  rjmp Window_DrawColorTextFlash
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_DrawColorTextFlash @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R1:R0   background color
+; @param  R3:R2   foreground color
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return R5:R4   X pos behind string
+
+; @clobbers any, !Y, !R6, !R7
+
+Window_DrawColorTextFlash:
+  rcall winCalcAbsPosAndBorders       ; (R18, R19)
+Window_DrawColorTextFlash_loop:
+    lpm r16, Z
+    tst r16
+    breq Window_DrawColorTextFlash_loopEnd
+    rcall winDrawChar
+    brcc Window_DrawColorTextFlash_loopEnd
+    adiw zh:zl, 1                     ; next char
+  rjmp Window_DrawColorTextFlash_loop
+Window_DrawColorTextFlash_loopEnd:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_DrawCharAt @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R16     char to write
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return R5:R4   X pos behind char
+; @clobbers any, !Y
+
+Window_DrawCharAt:
+  rcall winCalcAbsPosAndBorders
+
+  ldd r0, Y+WIN_OFFS_BG_COL_LO
+  ldd r1, Y+WIN_OFFS_BG_COL_HI
+  ldd r2, Y+WIN_OFFS_FG_COL_LO
+  ldd r3, Y+WIN_OFFS_FG_COL_HI
+
+  rjmp winDrawChar
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine winCalcAbsPosAndBorders
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R5:R4   X relative to window
+; @param  R7:R6   Y relative to window
+; @return R9:R8   first X pos right of windows
+; @return R5:R4   X relative to screen
+; @return R7:R6   Y relative to screen
+; @return R9:R8   first X pos right of window (abs)
+; @return R11:R10 first Y pos below window (abs)
+; @clobbers r18, r19
+
+winCalcAbsPosAndBorders:
+  ; calc abs X pos
+  ldd r18, Y+WIN_OFFS_X_LO
+  ldd r19, Y+WIN_OFFS_X_HI
+  add r4, r18                  ; add X of window
+  adc r5, r19
+
+  ; calc first X pos behind window
+  ldd r8, Y+WIN_OFFS_WIDTH_LO
+  ldd r9, Y+WIN_OFFS_WIDTH_HI
+  add r8, r18
+  adc r9, r19
+
+  ; calc abs Y pos
+  ldd r18, Y+WIN_OFFS_Y_LO
+  ldd r19, Y+WIN_OFFS_Y_HI
+  add r6, r18                ; add Y of window
+  adc r7, r19
+  
+  ; calc first Y pos behind window
+  ldd r10, Y+WIN_OFFS_HEIGHT_LO
+  ldd r11, Y+WIN_OFFS_HEIGHT_HI
+  add r10, r18
+  adc r11, r19
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine winDrawChar
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R16     char to write
+; @param  R5:R4   absolute X on screen
+; @param  R7:R6   absolute Y on screen
+; @param  R9:R8   first X pos right of windows
+; @return R5:R4   X pos behind char
+; @clobbers any, !Y, !R6, !R7
+
+winDrawChar:
+  push zl
+    push zh
+      mov r12, r16
+      ldd zl, Y+WIN_OFFS_FONT_LO
+      ldd zh, Y+WIN_OFFS_FONT_HI
+
+      ; check whether the char fits inside window
+      bigcall FONT_GetCharWidth         ; r16=char width
+
+      clr r17
+      add r16, r4                       ; char width+X
+      adc r17, r5
+      sub r16, r8                       ; check against window width
+      sbc r17, r9
+      brcc winDrawChar_ret              ; not fit, jmp
+    
+      ; actually draw char
+      mov r16, r12
+      push r8
+        push r9
+          push r10
+            push r11
+              bigcall Display_DrawChar
+            pop r11
+          pop r10
+        pop r9
+      pop r8
+      clr r16
+      add r4, r18                       ; increment X
+      adc r5, r16
+      sec                               ; write succeeded
+winDrawChar_ret:
+    pop zh
+  pop zl
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_WriteHexWordAt @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R17:R16 word to write
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return R5:R4   X pos behind string
+; @clobbers any, !Y
+
+Window_WriteHexWordAt:
+  push r16
+    mov r16, r17
+    rcall Window_WriteHexByteAt
+  pop r16
+  rcall Window_WriteHexByteAt
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine Window_WriteHexByteAt @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R16     byte to write
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return R5:R4   X pos behind string
+; @clobbers any, !Y
+
+Window_WriteHexByteAt:
+  push r16
+    swap r16
+    rcall winWriteNibble
+  pop r16
+  rcall winWriteNibble
+  ret
+; @end
+
+
+
+winWriteNibble:
+  push r4
+    push r5
+      push r6
+        push r7
+          rcall winNibbleToAscii   ; write high nibble (r16, r17)
+          rcall Window_DrawCharAt  ; draw
+        pop r7
+      pop r6
+    pop r5
+  pop r4
+  clr r17
+  add r4, r18
+  adc r5, r17
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine winNibbleToAscii
+;
+; Convert a nibble to an ASCII char.
+; @return R16 ASCII representation of that nibble (e.g. '0' for 0)
+; @param  R16 byte (in bits 0-3)
+; @clobbers r16, r17
+
+winNibbleToAscii:
+  andi r16, 0xf
+  cpi r16, 10
+  brcs winNibbleToAscii_l1
+  ldi r17, 7
+  add r16, r17
+winNibbleToAscii_l1:
+  ldi r17, '0'
+  add r16, r17
+  ret
+; @end
+
+
+
+
+
+
+#if 0
+; ---------------------------------------------------------------------------
+; @routine Window_DrawTextFlash @global
+;
+; @param Y pointer to screen object in SDRAM
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return R5:R4   X pos behind string
+; @return R7:R6   Y pos behind string
+; @clobbers any, !Y
+
+Window_DrawTextFlash:
+  ; calc abs X pos
+  ldd r18, Y+WIN_OFFS_X_LO
+  ldd r19, Y+WIN_OFFS_X_HI
+  add r4, r18                  ; add X of window
+  adc r5, r19
+
+  ; calc first X pos behind window
+  ldd r8, Y+WIN_OFFS_WIDTH_LO
+  ldd r9, Y+WIN_OFFS_WIDTH_HI
+  add r8, r18
+  adc r9, r19
+
+  ; calc abs Y pos
+  ldd r18, Y+WIN_OFFS_Y_LO
+  ldd r19, Y+WIN_OFFS_Y_HI
+  add r6, r18                ; add Y of window
+  adc r7, r19
+  
+  ; calc first Y pos behind window
+  ldd r10, Y+WIN_OFFS_HEIGHT_LO
+  ldd r11, Y+WIN_OFFS_HEIGHT_HI
+  add r10, r18
+  adc r11, r19
+
+Window_DrawTextFlash_loop:
+    push zl
+      push zh
+        rcall winCalcLengthWordFlash
+      pop zh
+    pop zl
+    mov r18, r4
+    mov r19, r5
+    add r18, r12
+    adc r19, r13
+    sub r18, r8
+    sbc r19, r9
+    brcs Window_DrawTextFlash_xOkay
+    ; we need to go to the beginning of the next line
+    rcall Window_DrawTextFlash_nextLine
+    brcc Window_DrawTextFlash_loopEnd ; outside the window, jmp
+Window_DrawTextFlash_xOkay:
+    rcall winDrawWordFlash            ; Z points at blank/0 byte after call
+    lpm r16, Z+
+    tst r16                           ; end of string?
+    breq Window_DrawTextFlash_loopEnd
+    cpi r16, 13
+    breq Window_DrawTextFlash_handle13
+    ; insert other handled chars here
+    ; write blank char
+    push zl
+      push zh
+        ldd zl, Y+WIN_OFFS_FONT_LO
+        ldd zh, Y+WIN_OFFS_FONT_HI
+        ldi r16, 32                    ; space
+        bigcall Display_DrawChar
+      pop zh
+    pop zl
+    add r4, r8   ; increment X
+    adc r5, r9
+
+
+    rjmp Window_DrawTextFlash_loopNext
+Window_DrawTextFlash_handle13:
+  rcall Window_DrawTextFlash_nextLine
+Window_DrawTextFlash_loopNext:
+  rjmp Window_DrawTextFlash_loop
+Window_DrawTextFlash_nextLine:
+  push zl
+    push zh
+      ldd zl, Y+WIN_OFFS_FONT_LO
+      ldd zh, Y+WIN_OFFS_FONT_HI
+      bigcall FONT_GetCharWidth     ; r16=char width
+    pop zh
+  pop zl
+  ldd r4, Y+WIN_OFFS_X_LO           ; X=left border
+  ldd r5, Y+WIN_OFFS_X_HI
+  clr r17
+  add r6, r16                       ; increment Y by font height
+  adc r7, r17
+  mov r16, r6                       ; check against lower border of window
+  mov r17, r7
+  sub r16, r10
+  sbc r17, r11                      ; CF set if inside window, cleared otherwise
+  ret
+Window_DrawTextFlash_loopEnd:
+  ret
+; @end
+
+
+
+
+; ---------------------------------------------------------------------------
+; @routine winDrawWordFlash
+;
+; @param Y pointer to screen object in SDRAM
+; @param Z pointer to string in FLASH
+; @param  R1:R0   background color
+; @param  R3:R2   foreground color
+; @param  R5:R4   X (dest)
+; @param  R7:R6   Y (dest)
+; @return r5:r4 next X pos
+; @return Z pointer to next char behind current word
+; @clobbers any, !Y, !r1-r15
+
+winDrawWordFlash:
+winDrawWordFlash_loop:
+    lpm r16, Z
+    cpi r16, 33
+    brcs winDrawWordFlash_ret
+    push zl
+      push zh
+        ldd zl, Y+WIN_OFFS_FONT_LO
+        ldd zh, Y+WIN_OFFS_FONT_HI
+        bigcall Display_DrawChar
+      pop zh
+    pop zl
+    clr r16
+    add r4, r18   ; increment X
+    adc r5, r16
+    adiw zh:zl, 1
+  rjmp winDrawWordFlash_loop
+winDrawWordFlash_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine winCalcLengthWordFlash
+;
+; @param Y pointer to screen object in SDRAM
+; @param Z pointer to string in FLASH
+; @return r13:r12 width of next word in pixels
+; @return Z pointer to next char behind current word
+; @clobbers any, !Y, !r1-r11, !r14, !r15
+
+winCalcLengthWordFlash:
+  clr r12
+  clr r13
+winCalcLengthWordFlash_loop:
+    lpm r16, Z
+    cpi r16, 33
+    brcs winCalcLengthWordFlash_ret
+    push zl
+      push zh
+        ldd zl, Y+WIN_OFFS_FONT_LO
+        ldd zh, Y+WIN_OFFS_FONT_HI
+        bigcall FONT_GetCharWidth     ; r16=char width
+        clr r17
+        add r12, r16
+        adc r13, r17
+      pop zh
+    pop zl
+    brcs winCalcLengthWordFlash_error
+    adiw zh:zl, 1                     ; next char
+  rjmp winCalcLengthWordFlash_loop
+winCalcLengthWordFlash_error:
+  ldi r12, 0xff
+  ldi r13, 0xff
+winCalcLengthWordFlash_ret:
+  ret
+; @end
+
+#endif ; if 0
+
+
+
+#endif ; AQH_AVR_STATICGUI_WINDOW_ASM
+