45 lines
1.6 KiB
NASM
45 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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; @routine NETMSG_Range_Write
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;
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; @param Y pointer to device to write msg for
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; @param X pointer to buffer to write to
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; @param R18 command
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; @param R20 range begin
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; @param R21 range end
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; @clobbers R16, R18 (R17, R19, R20, R21, Z)
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NETMSG_Range_Write:
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ldi r16, 0xff
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st X+, r16 ; dest address
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ldi r16, 8 ; msg code+src address+6 payload bytes
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st X+, r16 ; msg len
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st X+, r18 ; msg code
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ldd r16, Y+NET_IFACE_OFFS_ADDRESS
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st X+, r16 ; src address
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push r20
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push r21
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rcall NETMSG_Common_AddUidToBuffer ; (R16, R18, R19, R20, R21)
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pop r21
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pop r20
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st X+, r20 ; range begin
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st X+, r21 ; range end
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sbiw xh:xl, 10 ; go back to beginning of message (1 byte dst addr, 1 byte length, 8 bytes payload)
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rcall NETMSG_CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
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sbiw xh:xl, 11 ; go back to beginning of message (1 byte dst addr, 1 byte length, 8 bytes payload, 1 byte crc)
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ret
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; @end
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