avr: split code in multiple files and routines.

avr/modules/flash/hdl_flash_start.asm

@@ -0,0 +1,58 @@
+; ***************************************************************************
+; 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
+
+
+
+
+; ---------------------------------------------------------------------------
+; Handle FLASH START packet.
+;
+; IN:
+; - X  : buffer containing the message
+; OUT:
+; - CFLAG: set if message is for us, cleared otherwise
+; REGS: r16, r18. r19. r20, r21, X (R15, R17, R22)
+
+flashHandleFlashStart:
+  lds r18, flashUid
+  lds r19, flashUid+1
+  lds r20, flashUid+2
+  lds r21, flashUid+3
+  adiw xh:xl, FLASH_PACKET_START_OFFS_UID
+  ld r16, X+
+  cp r16, r18
+  brne flashHandleFlashStart_notMe
+  ld r16, X+
+  cp r16, r19
+  brne flashHandleFlashStart_notMe
+  ld r16, X+
+  cp r16, r20
+  brne flashHandleFlashStart_notMe
+  ld r16, X
+  cp r16, r21
+  brne flashHandleFlashStart_notMe
+  ; okay, flash start message is for us
+  rcall flashWaitFor100ms
+  rcall flashSendFlashResponse             ; (R15, R16, R17, R18, R19, R20, R21, R22, X)
+  sec
+  ret
+flashHandleFlashStart_notMe:
+  clc
+  ret
+
+
+