358 lines
9.7 KiB
NASM
358 lines
9.7 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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; defines
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.equ CPRO_CMD_PING = 10
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.equ CPRO_CMD_PONG = 11
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.equ CPRO_CMD_COMSENDSTATS = 20
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.equ CPRO_CMD_COMRECVSTATS = 21
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.equ CPRO_CMD_TWIBUSMEMBER = 30
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.equ CPRO_CMD_DEBUG = 40
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.equ CPRO_CMD_VALUE = 51 ; was 50 when sending timestamp instead of uid
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.equ CPRO_CMD_NEED_ADDRESS = 60
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.equ CPRO_CMD_HAVE_ADDRESS = 61
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.equ CPRO_CMD_CLAIM_ADDRESS = 62
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.equ CPRO_CMD_DENY_ADDRESS = 63
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.equ CPRO_CMD_ADDRESS_RANGE = 64
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.equ CPRO_CMD_FLASH_START = 70
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.equ CPRO_CMD_FLASH_END = 71
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.equ CPRO_CMD_FLASH_ADDR = 72
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.equ CPRO_CMD_FLASH_DATA = 73
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.equ CPRO_CMD_FLASH_RSP = 74
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.equ CPRO_CMD_DEVICE = 80
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.equ CPRO_CMD_MEMSTATS = 81
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; flags for variable payload enqueue function
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.equ CPRO_PAYLOAD_FLAGS_SECONDS = 0x01
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.equ CPRO_PAYLOAD_FLAGS_UID = 0x02
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.equ CPRO_PAYLOAD_FLAGS_RESERVED1 = 0x04
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.equ CPRO_PAYLOAD_FLAGS_NUM0 = 0x08
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.equ CPRO_PAYLOAD_FLAGS_NUM1 = 0x10
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.equ CPRO_PAYLOAD_FLAGS_NUM2 = 0x20
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.equ CPRO_PAYLOAD_FLAGS_NUM3 = 0x40
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.equ CPRO_PAYLOAD_FLAGS_NUM4 = 0x80
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.equ CPRO_PAYLOAD_FLAGS_SHIFT_NUM = 3
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.equ CPRO_PACKET_HAVEADDR_OFFS_ADDRESS = COM_MSG_OFFS_PAYLOAD+4
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.equ CPRO_PACKET_CLAIMADDR_OFFS_ADDRESS = COM_MSG_OFFS_PAYLOAD+4
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.equ CPRO_PACKET_DENYADDR_OFFS_ADDRESS = COM_MSG_OFFS_PAYLOAD+4
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.equ CPRO_WAITTIME_GETADDR = 130
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.equ CPRO_WAITTIME_CLAIMADDR = 17
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.equ CPRO_WAITTIME_RECLAIMADDR = 10
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; current mode of operation
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.equ CPRO_MODE_NORMAL = 0 ; normal operation
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.equ CPRO_MODE_GETADDRSTARTED = 10 ; waiting for HAVE_ADDRESS and ADDRESS_RANGE packets to arrive
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.equ CPRO_MODE_CLAIMING_ADDR1 = 20 ; CLAIM_ADDRESS sent, waiting for HAVE_ADDRESS packet to reject the claim
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.equ CPRO_MODE_CLAIMING_ADDR2 = 21 ; CLAIM_ADDRESS sent, 2nd try
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.equ CPRO_MODE_CLAIMING_ADDR3 = 22 ; CLAIM_ADDRESS sent, 3rd try
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.equ CPRO_MODE_SENDING_HAVE_ADDRESS = 30 ; waiting for our turn to send HAVE_ADDRESS packet
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.equ CPRO_MODE_RECLAIMING_ADDR = 40 ; CLAIM_ADDRESS with the previously used address sent after bootup
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; ***************************************************************************
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; data
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.dseg
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cproDataBegin:
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#ifndef BASE_SYSTEM
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cproMode: .byte 1 ; "normal", "waitForHaveAddress", "samplingAddresses", "claimAddress"
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cproAddrRangeBegin: .byte 1
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cproAddrRangeEnd: .byte 1
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cproAddressWaitCounter: .byte 1 ; counter for seconds to wait for all nodes to respond
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cproUsedAddresses: .byte 16 ; one bit per address known to b in use
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#endif
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cproDataEnd:
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; ***************************************************************************
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; code
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.cseg
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CPRO_BEGIN:
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CPRO_Init:
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; preset SRAM data area
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ldi xh, HIGH(cproDataBegin)
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ldi xl, LOW(cproDataBegin)
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clr r16
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ldi r17, (cproDataEnd-cproDataBegin)
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rcall Utils_FillSram
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sec
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ret
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CPRO_OnEverySecond:
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#ifndef BASE_SYSTEM
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lds r17, cproMode
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cpi r17, CPRO_MODE_NORMAL
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breq CPRO_OnEverySecond_done
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CPRO_OnEverySecond_l1:
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cpi r17, CPRO_MODE_GETADDRSTARTED
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brne CPRO_OnEverySecond_l2
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rjmp cproHandle1sGetAddrStarted
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CPRO_OnEverySecond_l2:
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cpi r17, CPRO_MODE_SENDING_HAVE_ADDRESS
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brne CPRO_OnEverySecond_l3
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rjmp cproHandle1sSendingHaveAddress
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CPRO_OnEverySecond_l3:
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cpi r17, CPRO_MODE_CLAIMING_ADDR1
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brne CPRO_OnEverySecond_l4
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rjmp cproHandle1sClaimingAddr12
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CPRO_OnEverySecond_l4:
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cpi r17, CPRO_MODE_CLAIMING_ADDR2
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brne CPRO_OnEverySecond_l5
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rjmp cproHandle1sClaimingAddr12
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CPRO_OnEverySecond_l5:
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cpi r17, CPRO_MODE_CLAIMING_ADDR3
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brne CPRO_OnEverySecond_l6
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rjmp cproHandle1sClaimingAddr3
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CPRO_OnEverySecond_l6:
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cpi r17, CPRO_MODE_RECLAIMING_ADDR
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brne CPRO_OnEverySecond_done
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rjmp cproHandle1sReclaimingAddr
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CPRO_OnEverySecond_done:
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#endif
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ret
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; ---------------------------------------------------------------------------
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; CPRO_OnPacketReceived:
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;
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; Try to handle the given packet.
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;
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; IN:
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; - Y : pointer to received buffer
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; OUT:
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; - CFLAG: set if handled, cleared otherwise
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; USED: depending on called routines
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CPRO_OnPacketReceived:
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ldd r16, y+(COM_BUFFER_OFFS_DATA+COM_MSG_OFFS_CMD)
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cpi r16, CPRO_CMD_PING
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brne CPRO_OnPacketReceived_l1
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rjmp cproHandlePing
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CPRO_OnPacketReceived_l1:
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#ifndef BASE_SYSTEM
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cpi r16, CPRO_CMD_NEED_ADDRESS
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brne CPRO_OnPacketReceived_l2
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rjmp cproHandlePckNeedAddr
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CPRO_OnPacketReceived_l2:
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cpi r16, CPRO_CMD_HAVE_ADDRESS
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brne CPRO_OnPacketReceived_l3
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rjmp cproHandlePckHaveAddr
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CPRO_OnPacketReceived_l3:
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cpi r16, CPRO_CMD_ADDRESS_RANGE
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brne CPRO_OnPacketReceived_l4
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rjmp cproHandleAddrRange
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CPRO_OnPacketReceived_l4:
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cpi r16, CPRO_CMD_DENY_ADDRESS
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brne CPRO_OnPacketReceived_l5
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rjmp cproHandleDenyAddr
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CPRO_OnPacketReceived_l5:
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cpi r16, CPRO_CMD_CLAIM_ADDRESS
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brne CPRO_OnPacketReceived_l6
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rjmp cproHandlePckClaimAddr
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CPRO_OnPacketReceived_l6:
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#endif
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clc
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ret
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cproHandlePing:
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ldd r16, y+(COM_BUFFER_OFFS_DATA+COM_MSG_OFFS_SRCADDR)
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tst r16
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breq cproHandlePing_notHandled
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rcall CPRO_EnqueuePong
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ret ; use carry flag from previous call
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cproHandlePing_notHandled:
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clc
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ret
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; ---------------------------------------------------------------------------
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; Enqueue a PING packet.
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;
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; IN:
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; - R16: destination address
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; OUT:
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; - CFLAG: set if okay, clear otherwise
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; MODIFIED REGS: R18, R20 (R15, R16, R17, X, Y)
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CPRO_EnqueuePing:
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ldi r18, CPRO_CMD_PING
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ldi r20, COM_BUFFER_PRIO_INFO
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rjmp cproEnqueueMsgWithCmdAndSrcAddr
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; ---------------------------------------------------------------------------
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; Enqueue a PONG packet.
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;
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; IN:
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; - R16: destination address
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; OUT:
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; - CFLAG: set if okay, clear otherwise
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; MODIFIED REGS: R18, R20 (R15, R16, R17, X, Y)
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CPRO_EnqueuePong:
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ldi r18, CPRO_CMD_PONG
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ldi r20, COM_BUFFER_PRIO_INFO
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rjmp cproEnqueueMsgWithCmdAndSrcAddr
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; ---------------------------------------------------------------------------
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; Enqueue a simple packet with payload only CMD and source address.
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;
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; IN:
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; - R16: destination address
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; - R18: command (e.g. CPRO_CMD_PING or CPRO_CMD_PONG)
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; - R20: priority of the message
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; OUT:
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; - CFLAG: set if okay, clear otherwise
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; MODIFIED REGS: R16, R17, X, Y (R3, R4, R15, R16, R17, R18, R19, R20, R21)
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cproEnqueueMsgWithCmdAndSrcAddr:
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push r16
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rcall COM_AllocBufferAndGetXY ; (r16, r17, r21)
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pop r16
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brcc cproEnqueueMsgWithCmdAndSrcAddr_error
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ldi r17, CPRO_PAYLOAD_FLAGS_SECONDS
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push xh
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push xl
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push r20
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rcall cproBeginMsgWithVariablePayload ; (R3, R4, R16, R17, R18, R19, R20, R21, X)
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pop r20
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pop xl
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pop xh
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rcall comCalcAndAddChecksumByte ; (R16, R17, R18, R19, X)
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; mark buffer as enqueued with PRIO given in R20
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rcall COM_EnqueuePacket ; (R15, R16)
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brcc cproEnqueueMsgWithCmdAndSrcAddr_error
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sec
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ret
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cproEnqueueMsgWithCmdAndSrcAddr_error:
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clc
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ret
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; ---------------------------------------------------------------------------
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; begin packet with variable payload.
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;
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; IN:
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; - R16: destination address
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; - R17: flags
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; - R18: command (e.g. CPRO_CMD_PING)
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; - X : pointer to packet buffer
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; OUT:
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; - X : points to end of packet as it was written so far
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; MODIFIED REGS: R3, R16, R17, R18, R19, R20, R21, X (R4)
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cproBeginMsgWithVariablePayload:
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; write header (dest address, msg length)
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st X+, r16 ; destination address
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mov r16, r17 ; calculate payload size
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mov r3, r17
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rcall cproCalcPayloadSize ; (R4, R16, R17)
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inc r16 ; add CMD byte
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inc r16 ; add source address byte
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st X+, r16
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; write payload
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st X+, r18 ; 0: CMD
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lds r16, comAddress ; 1: source address
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st X+, r16
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lsr r3 ; shift out CPRO_PAYLOAD_FLAGS_SECONDS
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brcc cproBeginMsgWithVariablePayload_l1
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lds r16, timerModuleCounterSecs ; adding of current seconds counter requested
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st X+, r16
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lds r16, timerModuleCounterSecs+1
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st X+, r16
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lds r16, timerModuleCounterSecs+2
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st X+, r16
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lds r16, timerModuleCounterSecs+3
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st X+, r16
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cproBeginMsgWithVariablePayload_l1:
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lsr r3 ; shift out shift out CPRO_PAYLOAD_FLAGS_UID
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brcc cproBeginMsgWithVariablePayload_l2
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push xh
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push xl
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rcall Utils_ReadUid ; (R16, X)
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pop xl
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pop xh
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st X+, r18
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st X+, r19
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st X+, r20
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st X+, r21
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cproBeginMsgWithVariablePayload_l2:
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ret
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; ---------------------------------------------------------------------------
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; cproCalcPayloadSize
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;
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; Calculate payload size from given flags
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;
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; IN:
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; - R16: flags
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; OUT:
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; - R16: payload size
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; MODIFIED REGS: R4, R16, R17
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cproCalcPayloadSize:
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clr r4
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ldi r17, 4
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lsr r16 ; shift out CPRO_PAYLOAD_FLAGS_SECONDS
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brcc cproCalcPayloadSize_l1
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add r4, r17 ; add 4 bytes
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cproCalcPayloadSize_l1:
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lsr r16 ; shift out CPRO_PAYLOAD_FLAGS_UID
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brcc cproCalcPayloadSize_l2
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add r4, r17 ; add 4 bytes
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cproCalcPayloadSize_l2:
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lsr r16 ; shift out reserved1, after this R16 contains CPRO_PAYLOAD_FLAGS_NUM0-4
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add r16, r4 ; add previous bytes to R16
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ret
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CPRO_END:
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.equ MODULE_SIZE_CPRO = CPRO_END-CPRO_BEGIN
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