59 lines
1.4 KiB
NASM
59 lines
1.4 KiB
NASM
; ***************************************************************************
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; copyright : (C) 2023 by Martin Preuss
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; email : martin@libchipcard.de
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;
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; ***************************************************************************
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; * This file is part of the project "AqHome". *
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; * Please see toplevel file COPYING of that project for license details. *
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; ***************************************************************************
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; ***************************************************************************
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; code
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.cseg
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; ---------------------------------------------------------------------------
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; Handle FLASH START packet.
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;
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; IN:
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; - X : buffer containing the message
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; OUT:
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; - CFLAG: set if message is for us, cleared otherwise
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; REGS: r16, r18. r19. r20, r21, X (R15, R17, R22)
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flashHandleFlashStart:
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lds r18, flashUid
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lds r19, flashUid+1
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lds r20, flashUid+2
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lds r21, flashUid+3
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adiw xh:xl, FLASH_PACKET_START_OFFS_UID
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ld r16, X+
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cp r16, r18
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brne flashHandleFlashStart_notMe
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ld r16, X+
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cp r16, r19
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brne flashHandleFlashStart_notMe
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ld r16, X+
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cp r16, r20
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brne flashHandleFlashStart_notMe
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ld r16, X
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cp r16, r21
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brne flashHandleFlashStart_notMe
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; okay, flash start message is for us
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rcall flashWaitFor100ms
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rcall flashSendFlashResponse ; (R15, R16, R17, R18, R19, R20, R21, R22, X)
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sec
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ret
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flashHandleFlashStart_notMe:
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clc
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ret
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