66 lines
1.6 KiB
NASM
66 lines
1.6 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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; wait indefinately until ATTN line is high, send packet over wire, retry until successfull
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;
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; IN:
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; - x : ptr to buffer to send
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; OUT:
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; - nothing
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; REGS: (R16, R17, R18, R21, R22, R24, R25, X)
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flashSendPacketUntilSuccess:
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push xl
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push xh
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rcall uartBitbang_SendPacket ; (R16, R17, R21, R22, X)
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pop xh
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pop xl
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brcc flashSendPacket_error
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ret
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flashSendPacket_error:
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ldi r16, 3
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rcall flashWaitForMulti100ms
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rcall flashWaitForAttnHigh ; (R16, R17, R18, R22, R24, R25)
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rjmp flashSendPacketUntilSuccess
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; ---------------------------------------------------------------------------
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; wait indefinately for free ATTN line
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;
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; IN:
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; - nothing
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; OUT:
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; - nothing
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; REGS: (R16, R17, R18, R22, R24, R25)
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flashWaitForAttnHigh:
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rcall uartBitbang_WaitForAttnHigh ; (r17, r22)
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brcc flashWaitForAttnHigh_stillLow
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ret
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flashWaitForAttnHigh_stillLow:
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rcall flashWaitDependingOnUid ; (R16, R18, R22, R24, R25)
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rjmp flashWaitForAttnHigh
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