avr: added common code.

avr/common/utils_copy_from_flash.asm

@@ -0,0 +1,35 @@
+; ***************************************************************************
+; copyright   : (C) 2023 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
+
+; ---------------------------------------------------------------------------
+; Utils_CopyFromFlash
+;
+; IN:
+; - X: dest in RAM
+; - Z: src in FLASH
+; - R18: number of bytes to copy
+; OUT:
+; - nothing
+; USED: R17, R18, X, Z
+
+Utils_CopyFromFlash:
+    lpm r16, Z+
+    st X+, r16
+    dec r18
+  brne Utils_CopyFromFlash
+  ret
+
+

avr/common/utils_copy_sdram.asm

@@ -0,0 +1,34 @@
+; ***************************************************************************
+; copyright   : (C) 2023 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
+
+; ---------------------------------------------------------------------------
+; Utils_Copy_SDRAM
+;
+; IN:
+; - X: dest in RAM
+; - Y: src in RAM
+; - R18: number of bytes to copy
+; OUT:
+; - nothing
+; USED: R17, R18, X, Y
+Utils_Copy_SDRAM:
+    ld r17, Y+
+    st X+, r17
+    dec r18
+  brne Utils_Copy_SDRAM
+  ret
+
+