42 lines
1.2 KiB
NASM
42 lines
1.2 KiB
NASM
; ***************************************************************************
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; copyright : (C) 2025 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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; @routine Utils_InitialWait
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;
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; Initial wait to desync nodes.
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;
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; This routine waits for between 10 to 2560 milliseconds (derived from UID)
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;
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; @clobbers r16, r17, r18, r19, r20, r21, r22, X
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Utils_InitialWait:
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; setup initial wait loop
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rcall Utils_ReadUid ; (R16, X)
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clr r16
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eor r16, r18
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eor r16, r19
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eor r16, r20
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eor r16, r21
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Utils_InitialWait_l1: ; wait R16 x 10 milliseconds
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ldi r17, 200
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Utils_InitialWait_l2: ; wait for 10ms
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rcall Utils_WaitFor50MicroSecs ; (R22)
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dec r17
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brne Utils_InitialWait_l2
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dec r16
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brne Utils_InitialWait_l1
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ret
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; @end
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