247 lines
7.2 KiB
NASM
247 lines
7.2 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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; @routine CPRO_WriteReportValue @global
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; Write a REPORT_VALUE packet.
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;
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; @return nothing
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; @param R16 destination address
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; @param R17 value id
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; @param R19:R18 value
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; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100)
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; @param R22 value type
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; @param X buffer to write to
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; @clobbers R16 (R17, R18, R19, R20, R21)
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CPRO_WriteReportValue:
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rcall CPRO_PrepareReportValue ; (R16, R17, R18, R19, R20, R21)
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; set msg id
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adiw xh:xl, CPRO_PACKET_VALUE_OFFS_MSGID
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ldi r18, 1
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lds r16, com2LastMsgId
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lds r17, com2LastMsgId+1
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add r16, r18
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dec r18
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adc r17, r18
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sts com2LastMsgId, r16
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sts com2LastMsgId+1, r17
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st X+, r16
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st X+, r17
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sbiw xh:xl, CPRO_PACKET_VALUE_OFFS_MSGID+2 ; go back to begin of msg
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; calc and add checksum
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rcall com2CalcAndAddChecksumByte ; (R16, R17, R18, R19, X)
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sbiw xh:xl, 17 ; go back to beginning of message
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine CPRO_PrepareReportValue @global
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; Write a REPORT_VALUE packet (except the checksum byte).
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;
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; @return nothing
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; @param R16 destination address
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; @param R17 value id
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; @param R19:R18 value
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; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100)
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; @param R22 value type
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; @param X buffer to write to
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; @clobbers R16 (R17, R18, R19, R20, R21)
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CPRO_PrepareReportValue:
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st X+, r16 ; dest address
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ldi r16, 14 ; msg code+src address+12 payload bytes
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st X+, r16 ; msg len
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ldi r16, CPRO_CMD_VALUE_REPORT
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st X+, r16 ; msg code
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lds r16, com2Address
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st X+, r16 ; src address
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adiw xh:xl, 6 ; skip uid (4 bytes), msg/ref id (2 bytes)
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st X+, r17 ; value id
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st X+, r22 ; value type
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st X+, r18 ; value (low)
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st X+, r19 ; value (high)
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st X+, r20 ; denom (low)
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st X+, r21 ; denom (high)
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sbiw xh:xl, 12 ; go back to UID (12=16 back, 4 forward)
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rcall COM2_AddUidToBuffer ; (r16, r18, r19, r20, r21)
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clr r16
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st X+, r16 ; msg id (low)
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st X+, r16 ; msg id (high)
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sbiw xh:xl, 10 ; go back to beginning of message
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine CPRO_WriteSetValueResponse @global
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; Write response to a SET_VALUE request.
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;
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; @return nothing
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; @param R16 message code (CPRO_CMD_VALUE_SET_ACK or CPRO_CMD_VALUE_SET_NACK)
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; @param X buffer to write to
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; @param Y buffer with received setValueRequest message
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; @clobbers R16, R17, R18, R19, (Y)
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CPRO_WriteSetValueResponse:
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rcall cproInvertValueMsg ; (R16, R17, R18, R19, Y)
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; add checksum byte
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rcall com2CalcAndAddChecksumByte ; (R16, R17, R18, R19, X)
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sbiw xh:xl, 16 ; go back to beginning of message
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine CPRO_WriteGetValueResponse @global
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; Write response to a SET_VALUE request.
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;
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; @return nothing
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; @param R16 message code (CPRO_CMD_VALUE_SET_ACK or CPRO_CMD_VALUE_SET_NACK)
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; @param R19:R18 value
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; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100, 0=don't change)
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; @param X buffer to write to
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; @param Y buffer with received setValueRequest message
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; @clobbers R16, R17, R18, R19, (R20, R21, Y)
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CPRO_WriteGetValueResponse:
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push r18
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push r19
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rcall cproInvertValueMsg ; (R16, R17, R18, R19, Y)
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pop r19
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pop r18
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; replace values
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adiw xh:xl, CPRO_PACKET_VALUE_OFFS_VALUE
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st X+, r18 ; value (low)
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st X+, r19 ; value (high)
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st X+, r20 ; denom (low)
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st X+, r21 ; denom (high)
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sbiw xh:xl, CPRO_PACKET_VALUE_OFFS_VALUE+4
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; add checksum byte
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rcall com2CalcAndAddChecksumByte ; (R16, R17, R18, R19, X)
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sbiw xh:xl, 13 ; go back to beginning of message
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine cproInvertValueMsg
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; Write response to a SET_VALUE request.
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;
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; @return nothing
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; @param R16 message code (CPRO_CMD_VALUE_SET_ACK or CPRO_CMD_VALUE_SET_NACK)
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; @param X buffer to write to
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; @param Y buffer with received setValueRequest message
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; @clobbers R16, R17, R18, R19, (Y)
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cproInvertValueMsg:
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; copy received message into new message
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mov r19, r16
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ldi r18, 16 ; message size without checksum byte
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rcall Utils_Copy_SDRAM ; (R17, R18, X, Y)
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sbiw xh:xl, 16 ; go back to beginning of message
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; exchange src and dest address
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adiw xh:xl, 3 ; src address
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ld r16, X
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lds r17, com2Address
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st X, r17 ; set our src address
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sbiw xh:xl, 3
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st X, r16 ; set old src address as destination address
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; replace msg code
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adiw xh:xl, 2 ; msg code
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st X, r19
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sbiw xh:xl, 2
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; replace UID
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adiw xh:xl, CPRO_PACKET_VALUE_OFFS_UID
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rcall COM2_AddUidToBuffer ; (r16, r18, r19, r20, r21)
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sbiw xh:xl, CPRO_PACKET_VALUE_OFFS_UID+4 ; go back to beginning of message
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine CPRO_SendSetValueResponse @global
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; Write response to a SET_VALUE request.
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;
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; @return CFLAG set if okay, cleared on error
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; @param R16 message code (CPRO_CMD_VALUE_SET_ACK or CPRO_CMD_VALUE_SET_NACK)
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; @param X buffer to write to
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; @param Y buffer with received setValueRequest message
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; @clobbers Y, (R16, R17, R18, R19, R22)
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CPRO_SendSetValueResponse:
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push xh
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push xl
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mov yh, xh
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mov yl, xl
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ldi xl, LOW(com2SendBuffer)
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ldi xh, HIGH(com2SendBuffer)
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rcall CPRO_WriteSetValueResponse ; (R16, R17, R18, R19, Y)
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rcall COM2_SendPacket ; (r18, r19, r22, X)
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pop xl
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pop xh
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine CPRO_SendGetValueResponse @global
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; Write response to a GET_VALUE request.
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;
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; @return CFLAG set if okay, cleared on error
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; @param R16 message code (CPRO_CMD_VALUE_SET_ACK or CPRO_CMD_VALUE_SET_NACK)
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; @param R19:R18 value
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; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100, 0=don't change)
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; @param X buffer to write to
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; @param Y buffer with received getValueRequest message
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; @clobbers Y, (R16, R17, R18, R19, R22)
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CPRO_SendGetValueResponse:
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push xh
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push xl
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mov yh, xh
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mov yl, xl
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ldi xl, LOW(com2SendBuffer)
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ldi xh, HIGH(com2SendBuffer)
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rcall CPRO_WriteGetValueResponse ; (R16, R17, R18, R19, Y)
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rcall COM2_SendPacket ; (r18, r19, r22, X)
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pop xl
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pop xh
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ret
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; @end
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