58 lines
1.6 KiB
NASM
58 lines
1.6 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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; code
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.cseg
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; ---------------------------------------------------------------------------
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; @routine ioWaitForGivenMsg
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; Wait for incoming msg with given command
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;
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; @return CFLAG set if okay (packet received), cleared on error
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; @return r16 code of received msg
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; @param r16 command to wait for
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; @clobbers: r16, r17, r20, X (r18, r19, r22)
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ioWaitForGivenMsg:
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ldi r20, 10 ; number of tries
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ioWaitForGivenMsg_loop:
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push r16
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rcall ioRawWaitForValidMsg ; (r16, r17, r18, r19, r22, X)
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pop r17 ; pop into r17 (from r16)
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brcc ioWaitForGivenMsg_end
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ldi xl, LOW(flashRecvBuffer)
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ldi xh, HIGH(flashRecvBuffer)
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adiw xh:xl, COM2_MSG_OFFS_CMD
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ld r16, X
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sbiw xh:xl, COM2_MSG_OFFS_CMD
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cp r16, r17
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breq ioWaitForGivenMsg_gotIt
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cpi r16, CPRO_CMD_FLASH_END
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breq ioWaitForGivenMsg_gotIt
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mov r16, r17 ; put expected msg code back into r16 for next loop
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dec r20
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brne ioWaitForGivenMsg_loop
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clc
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ret
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ioWaitForGivenMsg_gotIt:
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sec
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ioWaitForGivenMsg_end:
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ret
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; @end
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