added filter modules.

avr/modules/f_keepup/0BUILD

@@ -0,0 +1,11 @@
+<?xml?>
+
+<gwbuild>
+
+  <extradist>
+    main.asm
+  </extradist>
+
+</gwbuild>
+
+

avr/modules/f_keepup/main.asm

@@ -0,0 +1,107 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+
+; ***************************************************************************
+; defines
+
+.equ FILTER_KEEPUP_OFFS_TIMER           = 0
+.equ FILTER_KEEPUP_OFFS_RESTARTVALUE    = 1
+.equ FILTER_KEEPUP_DATA_SIZE            = 2
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; @routine FilterKeepUp_Init @global
+;
+; @param Y  pointer to filter data
+; @clobbers r16
+
+FilterKeepUp_Init:
+  clr r16
+  std Y+FILTER_KEEPUP_OFFS_TIMER, r16
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine FilterKeepUp_Fini @global
+;
+; @param Y  pointer to filter data
+
+FilterKeepUp_Fini:
+  ; nothing to do
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine FilterKeepUp_GetValue @global
+;
+; @param Y  pointer to filter data
+; @return R16 value
+; @clobbers none
+
+FilterKeepUp_GetValue:
+  ldd r16, Y+FILTER_KEEPUP_OFFS_TIMER
+  tst r16
+  breq FilterKeepUp_GetValue_end
+  ldi r16, 1
+FilterKeepUp_GetValue_end:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine FilterKeepUp_SetValue @global
+;
+; @param Y  pointer to filter data
+; @param R16 value
+; @clobbers r17
+
+FilterKeepUp_SetValue:
+  tst r16
+  breq FilterKeepUp_SetValue_end
+  ldd r17, Y+FILTER_KEEPUP_OFFS_RESTARTVALUE
+  std Y+FILTER_KEEPUP_OFFS_TIMER, r17
+FilterKeepUp_SetValue_end:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine FilterKeepUp_Every100ms @global
+;
+; @param Y  pointer to filter data
+; @clobbers r16
+
+FilterKeepUp_Every100ms:
+  ldd r16, Y+FILTER_KEEPUP_OFFS_TIMER
+  tst r16
+  breq FilterKeepUp_Every100ms_end
+  dec r16
+  std Y+FILTER_KEEPUP_OFFS_TIMER, r16
+FilterKeepUp_Every100ms_end:
+  ret
+; @end
+
+
+
+