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-------------------------------------------------------------------------------
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-- Politecnico di Torino
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-- Dipartimento di Automatica e Informatica
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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-- Title : EPC Class1 Gen2 RFID Tag - Tag main FSM
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--
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-- File name : TagFSM.vhd
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--
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-- Description : Tag finite state machine (Mealy).
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--
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3 |
erwing |
-- Authors : Erwing R. Sanchez <erwing.sanchez@polito.it>
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2 |
erwing |
--
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- Tag Finite State Machine based on EPC Class 1 Gen 2 Air interface
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--
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-- The following requirements of the EPC document are not fully implemented.
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-- -In the "Select" command, the comparison between the mask and any
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-- portion of the memory does not work with bit precision. According
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-- to the EPC document, the comparison may start at any bit of any
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-- portion of the memory. In this implementation, the comparison starts
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-- with a word. It may, however, be of any length.
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-- -In the "Select" command, the truncate bit is not currently
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-- implemented and does not cause any effect.
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-- -Kill and Access passwords are not implemented. So, the tag behaves
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-- as though it had zero-valued passwords.
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-- -Access command is not implemented.
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-- -Kill and Lock commands are currently unavailable.
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--
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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library IEEE;
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use IEEE.STD_LOGIC_1164.all;
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use IEEE.std_logic_unsigned.all;
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use IEEE.STD_LOGIC_ARITH.all;
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library work;
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use work.epc_tag.all;
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entity TagFSM is
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generic(
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WordsRSV : integer := 8;
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WordsEPC : integer := 16;
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WordsTID : integer := 8;
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WordsUSR : integer := 256;
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AddrUSR : integer := 5; -- 1/2 memory address pins (maximum)
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Data : integer := 16); -- memory data width
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port (
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clk : in std_logic;
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rst_n : in std_logic;
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-- Receiver
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CommDone : in CommandInternalCode_t;
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Data_r : in std_logic_vector(31 downto 0);
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Pointer_r : in std_logic_vector(15 downto 0);
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RN16_r : in std_logic_vector(15 downto 0);
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Length_r : in std_logic_vector(7 downto 0);
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Mask_r : in std_logic_vector(MASKLENGTH-1 downto 0);
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-- -- MCU
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-- MCUComm : out CommandMCU_t;
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-- MCUCommVal : out std_logic;
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-- MCURdy : in std_logic;
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-- Inventoried and Select flags
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SInvD : out std_logic_vector(3 downto 0); -- Flag input
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SelD : out std_logic;
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SInvQ : in std_logic_vector(3 downto 0); -- Flag output
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SelQ : in std_logic;
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SInvCE : out std_logic_vector(3 downto 0); -- Flag enable
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SelCE : out std_logic;
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-- Random Number Generator
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rng_init : out std_logic;
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rng_cin : out std_logic_vector(30 downto 0);
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rng_ce : out std_logic;
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rng_cout : in std_logic_vector(30 downto 0);
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-- Memory
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mem_WR : out std_logic;
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mem_RD : out std_logic;
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mem_RB : in std_logic;
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mem_BANK : out std_logic_vector(1 downto 0);
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mem_ADR : out std_logic_vector((2*AddrUSR)-1 downto 0);
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mem_DTI : out std_logic_vector(Data-1 downto 0);
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mem_DTO : in std_logic_vector(Data-1 downto 0);
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-- Interrogator Response Timer Flag (T2) - see EPC Standard 1.09 p.34
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T2ExpFlag : in std_logic;
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-- Transmitter Command and Output buffer
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trm_cmd : out std_logic_vector(2 downto 0);
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trm_buf : out std_logic_vector(15 downto 0)
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);
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end TagFSM;
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architecture TagFSM1 of TagFSM is
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-------------------------------------------------------------------------------
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-- DATA_r values according to received command
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-------------------------------------------------------------------------------
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-- QUERY
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-- ___________________________________________________________
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-- |__DR__|__M__|__TRext__|__Sel__|__Session__|__Target__|__Q__|
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-- 12 11 9 8 6 4 3 0
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-- QUERYREP
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-- ___________
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-- |__Session__|
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-- 1 0
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-- QUERYADJUST
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-- ____________________
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-- |__Session__|__UpDn__|
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-- 4 2 0
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-- SELECT
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-- ______________________________________________
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-- |__Target__|__Action__|__MemBank__|__Truncate__|
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-- 8 5 2 0
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-- READ
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-- ___________
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-- |__MemBank__|
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-- 1 0
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-- WRITE
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-- _____________________________
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-- |__MemBank__|__Data xor RN16__|
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-- 17 15 0
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-------------------------------------------------------------------------------
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-- Signals
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-------------------------------------------------------------------------------
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-- Kill Flag & RNG initialization address (MSB)
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-- (LSB = MEMORY_KILL_RNG_ADDRESS_MSB + 1)
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constant MEMORY_KILL_RNG_ADDRESS_MSB : std_logic_vector((2*AddrUSR)-1 downto 0) := (others => '0');
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constant RESERVED_MEMORY_BANK : std_logic_vector(1 downto 0) := "00";
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constant EPC_MEMORY_BANK : std_logic_vector(1 downto 0) := "01";
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constant MEMORY_PC_ADDRESS_16b : std_logic_vector(15 downto 0) := conv_std_logic_vector(1, 16);
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constant MEMORY_CRC16_ADDRESS : std_logic_vector((2 * AddrUSR)-1 downto 0) := (others => '0');
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-- Error Codes
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constant NON_SPECIFIC_ERROR : std_logic_vector(15 downto 0) := X"00F0";
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-- Finite State Machine. [ st_STATE_COMMAND_DESCRIPTION ]
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type TagFSM_t is (st_PowerUp, st_PowerUp_GetFlagMSB, st_PowerUp_GetFlagLSB, st_PowerUp_LoadRNG,
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-- Ready
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st_Ready, st_Ready_QRY_LoadSlot_AND_SaveRN, st_Ready_QRY_CheckSlot_AND_SaveRN,
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st_Ready_QRY_LoadRN16Handler_AND_SaveRN, st_Ready_QRY_BackscatterRN16_AND_SaveRN,
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st_Ready_SEL_GetWord, st_Ready_SEL_NonMatchingTag, st_Ready_SEL_CompareWords,
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st_Ready_SEL_CompareBits, st_Ready_SEL_PrepareComparison, st_Ready_SEL_MatchingTag,
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-- Arbitrate
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st_Arbitrate, st_Arbitrate_QRYQRA_LoadSlot_AND_SaveRN, st_Arbitrate_QRR_CheckSlot,
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st_Arbitrate_QRYQRA_CheckSlot_AND_SaveRN,
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-- Reply
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st_Reply, st_Reply_ACK_SendPC_AND_DecodeEPCLength, st_Reply_ACK_GetPC,
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st_Reply_ACK_GetAndSendEPC, st_Reply_ACK_GetAndSendCRC16,
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-- Acknoledged
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st_Acknowledged, st_Acknowledged_QRY_CheckFlags, st_Acknowledged_RRN_LoadHandler_AND_SaveRN,
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st_Acknowledged_RRN_BackscatterHandler_AND_SaveRN,
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-- Open
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st_Open, st_Open_ACK_GetPC, st_Open_ACK_SendPC_AND_DecodeEPCLength,
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st_Open_ACK_GetAndSendEPC, st_Open_ACK_GetAndSendCRC16,
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st_Open_RRN_LoadHandler_AND_SaveRN, st_Open_RRN_BackscatterHandler_AND_SaveRN,
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-- Secured
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st_Secured, st_Secured_ACK_GetPC, st_Secured_ACK_SendPC_AND_DecodeEPCLength,
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st_Secured_ACK_GetAndSendEPC, st_Secured_ACK_GetAndSendCRC16,
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st_Secured_RRN_LoadHandler_AND_SaveRN, st_Secured_RRN_BackscatterHandler_AND_SaveRN,
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st_Secured_WR_CheckMemoryBounds, st_Secured_WR_WriteWord, st_Secured_WR_WriteIsDone,
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st_Secured_RD_CheckMemoryBounds, st_Secured_RD_ReadMemory, st_Secured_RD_Read_AND_Send,
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st_Secured_RD_SendLast, st_Secured_RD_SendHandle,
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-- Killed
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st_Killed);
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signal StTag, NextStTag : TagFSM_t;
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signal KillFlag, SlotIsZero : std_logic;
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signal Query_InventoryFlag_Match : std_logic;
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signal Query_SelectFlag_Match : std_logic;
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signal Slot, Slot_i : std_logic_vector(15 downto 0);
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signal GPR, GPR_i : std_logic_vector(31 downto 0); -- general purpose register
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signal RN16Handler, RN16Handler_i : std_logic_vector(15 downto 0);
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signal CurrSession, CurrSession_i : std_logic_vector(1 downto 0);
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signal CurrQ, CurrQ_i : std_logic_vector(3 downto 0);
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signal Select_Address_Pointer_Length_OK : std_logic;
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signal Select_Address_Bounds_OK : std_logic;
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signal Write_Address_Pointer_Length_OK : std_logic;
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signal Write_Address_Bounds_OK : std_logic;
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signal Read_Address_Pointer_Length_OK : std_logic;
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signal Read_Address_Bounds_OK : std_logic;
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signal GCounter, GCounter_i : std_logic_vector(7 downto 0);
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signal GCounter2, Gcounter2_i : std_logic_vector(7 downto 0);
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signal FirstCompWord, FirstCompWord_i : std_logic;
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signal ComparisonReg, ComparisonReg_i : std_logic_vector(Data-1 downto 0);
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signal ADRint, ADRint_i : std_logic_vector(15 downto 0);
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signal GPR_AFTER_COMPARISON_MUX : std_logic_vector(15 downto 0);
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signal MASK_AFTER_COMPARISON_BIT_MUX : std_logic_vector(15 downto 0);
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signal MASK_AFTER_FIRSTCOMPARISON_MUX : std_logic_vector(15 downto 0);
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signal SLOT_VALUE : std_logic_vector(15 downto 0);
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signal SelD_i, SelCE_i : std_logic;
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signal SInvD_i, SInvCE_i : std_logic_vector(3 downto 0);
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signal trm_cmd_i : std_logic_vector(2 downto 0);
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signal trm_buf_i : std_logic_vector(15 downto 0);
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-- Memory Signals
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signal mem_WR_i, mem_RD_i : std_logic;
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signal mem_ADR_i : std_logic_vector((2*AddrUSR)-1 downto 0);
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signal mem_DTI_i : std_logic_vector(Data-1 downto 0);
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signal mem_BANK_i : std_logic_vector(1 downto 0);
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-- RNG signals
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signal rng_cin_i : std_logic_vector(30 downto 0);
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signal rng_init_i, rng_ce_i : std_logic;
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begin -- TagFSM1
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SYNCRO : process (clk, rst_n)
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begin -- process SYNCRO
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if rst_n = '0' then -- asynchronous reset (active low)
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-- FSM
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StTag <= st_PowerUp;
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-- General Purpose Register
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GPR <= (others => '0');
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-- Slot Register
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Slot <= (others => '1');
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-- RN16 & Handler Register
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RN16Handler <= (others => '0');
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-- Memory signals
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mem_WR <= '0';
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mem_RD <= '0';
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mem_ADR <= (others => '0');
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mem_DTI <= (others => '0');
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mem_BANK <= (others => '0');
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ADRint <= (others => '0');
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-- RNG signals
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rng_cin <= (others => '0');
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rng_init <= '0';
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rng_ce <= '0';
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-- Internal signals and Flags
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CurrSession <= "00";
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CurrQ <= (others => '0');
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FirstCompWord <= '0';
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ComparisonReg <= (others => '0');
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-- Counters
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GCounter <= (others => '0');
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GCounter2 <= (others => '0');
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-- Transmitter
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trm_cmd <= trmcmd_Null;
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trm_buf <= (others => '0');
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elsif clk'event and clk = '1' then -- rising clock edge
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-- FSM
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StTag <= NextStTag;
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-- General Purpose Register
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GPR <= GPR_i;
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-- Slot Register
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Slot <= Slot_i;
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-- RN16 & Handler Register
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RN16Handler <= RN16Handler_i;
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-- Memory signals
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mem_WR <= mem_WR_i;
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mem_RD <= mem_RD_i;
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mem_ADR <= mem_ADR_i;
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mem_DTI <= mem_DTI_i;
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mem_BANK <= mem_BANK_i;
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ADRint <= ADRint_i;
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-- RNG signals
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rng_init <= rng_init_i;
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rng_cin <= rng_cin_i;
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rng_ce <= rng_ce_i;
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-- Internal signals and Flags
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CurrSession <= CurrSession_i;
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CurrQ <= CurrQ_i;
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FirstCompWord <= FirstCompWord_i;
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ComparisonReg <= ComparisonReg_i;
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-- Counters
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GCounter <= GCounter_i;
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GCounter2 <= GCounter2_i;
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-- Transmitter
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trm_cmd <= trm_cmd_i;
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trm_buf <= trm_buf_i;
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end if;
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end process SYNCRO;
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-------------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- NEXT STATE PROCESS
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-----------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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NEXT_ST : process (StTag, CommDone, mem_RB, mem_DTO, Query_SelectFlag_Match, Query_InventoryFlag_Match, SlotIsZero,
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Select_Address_Pointer_Length_OK, GPR, T2ExpFlag, RN16Handler, Write_Address_Pointer_Length_OK,
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Read_Address_Pointer_Length_OK, GCounter, MASK_AFTER_FIRSTCOMPARISON_MUX, MASK_AFTER_COMPARISON_BIT_MUX,
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GPR_AFTER_COMPARISON_MUX, CurrSession, Data_r, RN16_r)
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begin -- process NEXT_ST
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NextStTag <= StTag;
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case StTag is
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-------------------------------------------------------------------------
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-- POWERUP (in next state process)
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-------------------------------------------------------------------------
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when st_PowerUp =>
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if mem_RB = '1' then
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NextStTag <= st_PowerUp_GetFlagMSB;
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end if;
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when st_PowerUp_GetFlagMSB =>
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if mem_RB = '1' then
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if mem_DTO(15) = '1' then -- KILL flag!
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NextStTag <= st_Killed;
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else
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NextStTag <= st_PowerUp_GetFlagLSB;
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end if;
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end if;
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when st_PowerUp_GetFlagLSB =>
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if mem_RB = '1' then
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NextStTag <= st_PowerUp_LoadRNG;
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end if;
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318 |
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when st_PowerUp_LoadRNG =>
|
319 |
|
|
NextStTag <= st_Ready;
|
320 |
|
|
-----------------------------------------------------------------------
|
321 |
|
|
-- READY (in next state process)
|
322 |
|
|
-----------------------------------------------------------------------
|
323 |
|
|
when st_Ready =>
|
324 |
|
|
if CommDone = cmd_Query then
|
325 |
|
|
-- Check for matching Inventoried and SL flags
|
326 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1'then
|
327 |
|
|
NextStTag <= st_Ready_QRY_LoadSlot_AND_SaveRN;
|
328 |
|
|
end if;
|
329 |
|
|
elsif CommDone = cmd_Select then
|
330 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
331 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
332 |
|
|
else
|
333 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
334 |
|
|
end if;
|
335 |
|
|
end if;
|
336 |
|
|
|
337 |
|
|
when st_Ready_QRY_LoadSlot_AND_SaveRN =>
|
338 |
|
|
if mem_RB = '1' then
|
339 |
|
|
NextStTag <= st_Ready_QRY_CheckSlot_AND_SaveRN;
|
340 |
|
|
end if;
|
341 |
|
|
|
342 |
|
|
when st_Ready_QRY_CheckSlot_AND_SaveRN =>
|
343 |
|
|
if mem_RB = '1' then
|
344 |
|
|
if SlotIsZero = '1' then
|
345 |
|
|
NextStTag <= st_Ready_QRY_LoadRN16Handler_AND_SaveRN;
|
346 |
|
|
else
|
347 |
|
|
NextStTag <= st_Arbitrate;
|
348 |
|
|
end if;
|
349 |
|
|
end if;
|
350 |
|
|
|
351 |
|
|
when st_Ready_QRY_LoadRN16Handler_AND_SaveRN =>
|
352 |
|
|
if mem_RB = '1' then
|
353 |
|
|
NextStTag <= st_Ready_QRY_BackscatterRN16_AND_SaveRN;
|
354 |
|
|
end if;
|
355 |
|
|
|
356 |
|
|
when st_Ready_QRY_BackscatterRN16_AND_SaveRN =>
|
357 |
|
|
if mem_RB = '1' then
|
358 |
|
|
NextStTag <= st_Reply;
|
359 |
|
|
end if;
|
360 |
|
|
|
361 |
|
|
-- NOTE: Select command does not support
|
362 |
|
|
-- "bit" comparison. Comparison starts at
|
363 |
|
|
-- the beginning of a Word!!
|
364 |
|
|
when st_Ready_SEL_GetWord =>
|
365 |
|
|
if mem_RB = '1' then
|
366 |
|
|
NextStTag <= st_Ready_SEL_CompareWords;
|
367 |
|
|
end if;
|
368 |
|
|
|
369 |
|
|
when st_Ready_SEL_PrepareComparison =>
|
370 |
|
|
if mem_RB = '1' then
|
371 |
|
|
if unsigned(GCounter) < Data then
|
372 |
|
|
NextStTag <= st_Ready_SEL_CompareBits;
|
373 |
|
|
else
|
374 |
|
|
NextStTag <= st_Ready_SEL_CompareWords;
|
375 |
|
|
end if;
|
376 |
|
|
end if;
|
377 |
|
|
|
378 |
|
|
when st_Ready_SEL_CompareWords =>
|
379 |
|
|
--if Mask_r((GCounter2)+15 downto conv_integer(unsigned(GCounter2))) = GPR(15 downto 0) then
|
380 |
|
|
if MASK_AFTER_FIRSTCOMPARISON_MUX = GPR(15 downto 0) then
|
381 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
382 |
|
|
else
|
383 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
384 |
|
|
end if;
|
385 |
|
|
|
386 |
|
|
when st_Ready_SEL_CompareBits =>
|
387 |
|
|
-- if Mask_r(conv_integer(unsigned(GCounter2))+conv_integer(unsigned(GCounter))-1 downto conv_integer(unsigned(GCounter2))) = GPR(conv_integer(unsigned(GCounter))-1 downto 0) then
|
388 |
|
|
if MASK_AFTER_COMPARISON_BIT_MUX = GPR_AFTER_COMPARISON_MUX then
|
389 |
|
|
NextStTag <= st_Ready_SEL_MatchingTag;
|
390 |
|
|
else
|
391 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
392 |
|
|
end if;
|
393 |
|
|
|
394 |
|
|
when st_Ready_SEL_NonMatchingTag =>
|
395 |
|
|
NextStTag <= st_Ready;
|
396 |
|
|
|
397 |
|
|
when st_Ready_SEL_MatchingTag =>
|
398 |
|
|
NextStTag <= st_Ready;
|
399 |
|
|
|
400 |
|
|
-----------------------------------------------------------------------
|
401 |
|
|
-- ARBITRATE (in next state process)
|
402 |
|
|
-----------------------------------------------------------------------
|
403 |
|
|
when st_Arbitrate =>
|
404 |
|
|
-- Query command, in the Arbitrate state, behaves as in the Ready state
|
405 |
|
|
if CommDone = cmd_Query then
|
406 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1'then
|
407 |
|
|
NextStTag <= st_Ready_QRY_LoadSlot_AND_SaveRN;
|
408 |
|
|
else
|
409 |
|
|
NextStTag <= st_Ready;
|
410 |
|
|
end if;
|
411 |
|
|
elsif CommDone = cmd_QueryRep then
|
412 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
413 |
|
|
NextStTag <= st_Arbitrate_QRR_CheckSlot;
|
414 |
|
|
end if;
|
415 |
|
|
-- After Adjusting Q, the behavior of a QueryAdjust command
|
416 |
|
|
-- is the same as the Query Command.
|
417 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
418 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
419 |
|
|
if Data_r(2 downto 0) = "000" or Data_r(2 downto 0) = "110" or Data_r(2 downto 0) = "011" then
|
420 |
|
|
NextStTag <= st_Ready_QRY_LoadSlot_AND_SaveRN;
|
421 |
|
|
end if;
|
422 |
|
|
end if;
|
423 |
|
|
-- Select Command behaves always as in the Ready state!
|
424 |
|
|
elsif CommDone = cmd_Select then
|
425 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
426 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
427 |
|
|
else
|
428 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
429 |
|
|
end if;
|
430 |
|
|
end if;
|
431 |
|
|
|
432 |
|
|
when st_Arbitrate_QRR_CheckSlot =>
|
433 |
|
|
if SlotIsZero = '1' then
|
434 |
|
|
NextStTag <= st_Ready_QRY_LoadRN16Handler_AND_SaveRN;
|
435 |
|
|
else
|
436 |
|
|
NextStTag <= st_Arbitrate;
|
437 |
|
|
end if;
|
438 |
|
|
|
439 |
|
|
-----------------------------------------------------------------------
|
440 |
|
|
-- REPLY (in next state process)
|
441 |
|
|
-----------------------------------------------------------------------
|
442 |
|
|
when st_Reply =>
|
443 |
|
|
-- If interrogator reponse time expires, tag exits the Reply state
|
444 |
|
|
if T2ExpFlag = '1' then
|
445 |
|
|
NextStTag <= st_Arbitrate;
|
446 |
|
|
end if;
|
447 |
|
|
-- Query command, in the Reply state, behaves as in the Ready state
|
448 |
|
|
if CommDone = cmd_Query then
|
449 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1'then
|
450 |
|
|
NextStTag <= st_Ready_QRY_LoadSlot_AND_SaveRN;
|
451 |
|
|
else
|
452 |
|
|
NextStTag <= st_Ready;
|
453 |
|
|
end if;
|
454 |
|
|
-- QueryRep behaves as in the Arbitrate state
|
455 |
|
|
elsif CommDone = cmd_QueryRep then
|
456 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
457 |
|
|
NextStTag <= st_Arbitrate_QRR_CheckSlot;
|
458 |
|
|
end if;
|
459 |
|
|
-- After Adjusting Q, the behavior of a QueryAdjust command
|
460 |
|
|
-- is the same as the Query Command.
|
461 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
462 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
463 |
|
|
if Data_r(2 downto 0) = "000" or Data_r(2 downto 0) = "110" or Data_r(2 downto 0) = "011" then
|
464 |
|
|
NextStTag <= st_Ready_QRY_LoadSlot_AND_SaveRN;
|
465 |
|
|
end if;
|
466 |
|
|
end if;
|
467 |
|
|
elsif CommDone = cmd_Ack then
|
468 |
|
|
if RN16_r = RN16Handler then
|
469 |
|
|
NextStTag <= st_Reply_ACK_GetPC;
|
470 |
|
|
else
|
471 |
|
|
NextStTag <= st_Arbitrate;
|
472 |
|
|
end if;
|
473 |
|
|
elsif CommDone = cmd_Nak then
|
474 |
|
|
NextStTag <= st_Arbitrate;
|
475 |
|
|
-- Select Command behaves always as in the Ready state!
|
476 |
|
|
elsif CommDone = cmd_Select then
|
477 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
478 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
479 |
|
|
else
|
480 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
481 |
|
|
end if;
|
482 |
|
|
elsif (CommDone = cmd_Invalid) or (CommDone = cmd_NULL) then
|
483 |
|
|
NextStTag <= st_Reply;
|
484 |
|
|
else
|
485 |
|
|
NextStTag <= st_Arbitrate;
|
486 |
|
|
end if;
|
487 |
|
|
|
488 |
|
|
when st_Reply_ACK_GetPC =>
|
489 |
|
|
if mem_RB = '1' then
|
490 |
|
|
NextStTag <= st_Reply_ACK_SendPC_AND_DecodeEPCLength;
|
491 |
|
|
end if;
|
492 |
|
|
|
493 |
|
|
when st_Reply_ACK_SendPC_AND_DecodeEPCLength =>
|
494 |
|
|
if mem_RB = '1' then
|
495 |
|
|
NextStTag <= st_Reply_ACK_GetAndSendEPC;
|
496 |
|
|
end if;
|
497 |
|
|
|
498 |
|
|
when st_Reply_ACK_GetAndSendEPC =>
|
499 |
|
|
if mem_RB = '1' then
|
500 |
|
|
if unsigned(GPR) /= 0 then
|
501 |
|
|
NextStTag <= st_Reply_ACK_GetAndSendEPC;
|
502 |
|
|
else
|
503 |
|
|
NextStTag <= st_Reply_ACK_GetAndSendCRC16;
|
504 |
|
|
end if;
|
505 |
|
|
end if;
|
506 |
|
|
|
507 |
|
|
when st_Reply_ACK_GetAndSendCRC16 =>
|
508 |
|
|
if mem_RB = '1' then
|
509 |
|
|
NextStTag <= st_Acknowledged;
|
510 |
|
|
end if;
|
511 |
|
|
|
512 |
|
|
-----------------------------------------------------------------------
|
513 |
|
|
-- ACKNOWLEDGED (in next state process)
|
514 |
|
|
-----------------------------------------------------------------------
|
515 |
|
|
when st_Acknowledged =>
|
516 |
|
|
-- If interrogator reponse time expires, tag exits the Acknowledged state
|
517 |
|
|
if T2ExpFlag = '1' then
|
518 |
|
|
NextStTag <= st_Arbitrate;
|
519 |
|
|
end if;
|
520 |
|
|
if CommDone = cmd_Query then
|
521 |
|
|
NextStTag <= st_Acknowledged_QRY_CheckFlags;
|
522 |
|
|
elsif CommDone = cmd_QueryRep then
|
523 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
524 |
|
|
NextStTag <= st_Ready;
|
525 |
|
|
end if;
|
526 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
527 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
528 |
|
|
NextStTag <= st_Ready;
|
529 |
|
|
end if;
|
530 |
|
|
-- Ack Command is the same as in the Reply state.
|
531 |
|
|
elsif CommDone = cmd_Ack then
|
532 |
|
|
if RN16_r = RN16Handler then
|
533 |
|
|
NextStTag <= st_Reply_ACK_GetPC;
|
534 |
|
|
else
|
535 |
|
|
NextStTag <= st_Arbitrate;
|
536 |
|
|
end if;
|
537 |
|
|
elsif CommDone = cmd_Nak then
|
538 |
|
|
NextStTag <= st_Arbitrate;
|
539 |
|
|
elsif CommDone = cmd_ReqRN then
|
540 |
|
|
if RN16_r = RN16Handler then
|
541 |
|
|
NextStTag <= st_Acknowledged_RRN_LoadHandler_AND_SaveRN;
|
542 |
|
|
end if;
|
543 |
|
|
-- Select Command behaves always as in the Ready state!
|
544 |
|
|
elsif CommDone = cmd_Select then
|
545 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
546 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
547 |
|
|
else
|
548 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
549 |
|
|
end if;
|
550 |
|
|
elsif (CommDone = cmd_Invalid) or (CommDone = cmd_NULL) then
|
551 |
|
|
NextStTag <= st_Acknowledged;
|
552 |
|
|
else
|
553 |
|
|
NextStTag <= st_Arbitrate;
|
554 |
|
|
end if;
|
555 |
|
|
|
556 |
|
|
when st_Acknowledged_QRY_CheckFlags =>
|
557 |
|
|
-- Query Command in the Acknowledged state is almost the same as in the
|
558 |
|
|
-- Ready state. The difference is that the inventoried flags may change
|
559 |
|
|
-- (if the session is the same) before evaluating the Query condition.
|
560 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1'then
|
561 |
|
|
NextStTag <= st_Ready_QRY_LoadSlot_AND_SaveRN;
|
562 |
|
|
else
|
563 |
|
|
NextStTag <= st_Ready;
|
564 |
|
|
end if;
|
565 |
|
|
|
566 |
|
|
when st_Acknowledged_RRN_LoadHandler_AND_SaveRN =>
|
567 |
|
|
if mem_RB = '1' then
|
568 |
|
|
NextStTag <= st_Acknowledged_RRN_BackscatterHandler_AND_SaveRN;
|
569 |
|
|
end if;
|
570 |
|
|
|
571 |
|
|
when st_Acknowledged_RRN_BackscatterHandler_AND_SaveRN =>
|
572 |
|
|
if mem_RB = '1' then
|
573 |
|
|
NextStTag <= st_Secured;
|
574 |
|
|
end if;
|
575 |
|
|
|
576 |
|
|
-----------------------------------------------------------------------
|
577 |
|
|
-- OPEN (in next state process)
|
578 |
|
|
-----------------------------------------------------------------------
|
579 |
|
|
when st_Open =>
|
580 |
|
|
-- Query in Open = Query in Acknowledged
|
581 |
|
|
if CommDone = cmd_Query then
|
582 |
|
|
NextStTag <= st_Acknowledged_QRY_CheckFlags;
|
583 |
|
|
elsif CommDone = cmd_QueryRep then
|
584 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
585 |
|
|
NextStTag <= st_Ready;
|
586 |
|
|
end if;
|
587 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
588 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
589 |
|
|
NextStTag <= st_Ready;
|
590 |
|
|
end if;
|
591 |
|
|
elsif CommDone = cmd_Ack then
|
592 |
|
|
if RN16_r = RN16Handler then
|
593 |
|
|
NextStTag <= st_Open_ACK_GetPC;
|
594 |
|
|
else
|
595 |
|
|
NextStTag <= st_Arbitrate;
|
596 |
|
|
end if;
|
597 |
|
|
elsif CommDone = cmd_Nak then
|
598 |
|
|
NextStTag <= st_Arbitrate;
|
599 |
|
|
elsif CommDone = cmd_ReqRN then
|
600 |
|
|
if RN16_r = RN16Handler then
|
601 |
|
|
NextStTag <= st_Open_RRN_LoadHandler_AND_SaveRN;
|
602 |
|
|
end if;
|
603 |
|
|
-- Select Command behaves always as in the Ready state!
|
604 |
|
|
elsif CommDone = cmd_Select then
|
605 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
606 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
607 |
|
|
else
|
608 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
609 |
|
|
end if;
|
610 |
|
|
-- elsif CommDone = cmd_Kill then -- See kill flowchart pg.60 (EPC Standard)
|
611 |
|
|
-- if "Valid handle" then
|
612 |
|
|
-- if "Kill Password != 0" then
|
613 |
|
|
-- if "Valid Kill Password" then
|
614 |
|
|
-- NextStTag <= st_Killed;
|
615 |
|
|
-- else
|
616 |
|
|
-- NextStTag <= st_Arbitrate;
|
617 |
|
|
-- end if;
|
618 |
|
|
-- end if;
|
619 |
|
|
-- end if;
|
620 |
|
|
-- elsif CommDone = cmd_Access then -- See Access flowchart pg.63 (EPC Standard)
|
621 |
|
|
-- if "Valid Handle" then
|
622 |
|
|
-- if "Valid Access Password" then
|
623 |
|
|
-- NextStTag <= st_Secured;
|
624 |
|
|
-- else
|
625 |
|
|
-- NextStTag <= st_Arbitrate;
|
626 |
|
|
-- end if;
|
627 |
|
|
-- end if;
|
628 |
|
|
elsif CommDone = cmd_Invalid then -- See state & note pg.73
|
629 |
|
|
NextStTag <= st_Arbitrate;
|
630 |
|
|
end if;
|
631 |
|
|
|
632 |
|
|
when st_Open_RRN_LoadHandler_AND_SaveRN =>
|
633 |
|
|
if mem_RB = '1' then
|
634 |
|
|
NextStTag <= st_Open_RRN_BackscatterHandler_AND_SaveRN;
|
635 |
|
|
end if;
|
636 |
|
|
|
637 |
|
|
when st_Open_RRN_BackscatterHandler_AND_SaveRN =>
|
638 |
|
|
if mem_RB = '1' then
|
639 |
|
|
NextStTag <= st_Open;
|
640 |
|
|
end if;
|
641 |
|
|
|
642 |
|
|
when st_Open_ACK_GetPC =>
|
643 |
|
|
if mem_RB = '1' then
|
644 |
|
|
NextStTag <= st_Open_ACK_SendPC_AND_DecodeEPCLength;
|
645 |
|
|
end if;
|
646 |
|
|
|
647 |
|
|
when st_Open_ACK_SendPC_AND_DecodeEPCLength =>
|
648 |
|
|
if mem_RB = '1' then
|
649 |
|
|
NextStTag <= st_Open_ACK_GetAndSendEPC;
|
650 |
|
|
end if;
|
651 |
|
|
|
652 |
|
|
when st_Open_ACK_GetAndSendEPC =>
|
653 |
|
|
if mem_RB = '1' then
|
654 |
|
|
if unsigned(GPR) /= 0 then
|
655 |
|
|
NextStTag <= st_Open_ACK_GetAndSendEPC;
|
656 |
|
|
else
|
657 |
|
|
NextStTag <= st_Open_ACK_GetAndSendCRC16;
|
658 |
|
|
end if;
|
659 |
|
|
end if;
|
660 |
|
|
|
661 |
|
|
when st_Open_ACK_GetAndSendCRC16 =>
|
662 |
|
|
if mem_RB = '1' then
|
663 |
|
|
NextStTag <= st_Open;
|
664 |
|
|
end if;
|
665 |
|
|
|
666 |
|
|
-----------------------------------------------------------------------
|
667 |
|
|
-- SECURED (in next state process)
|
668 |
|
|
-----------------------------------------------------------------------
|
669 |
|
|
when st_Secured =>
|
670 |
|
|
-- Query in Secured = Query in Acknowledged
|
671 |
|
|
if CommDone = cmd_Query then
|
672 |
|
|
NextStTag <= st_Acknowledged_QRY_CheckFlags;
|
673 |
|
|
elsif CommDone = cmd_QueryRep then
|
674 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
675 |
|
|
NextStTag <= st_Ready;
|
676 |
|
|
end if;
|
677 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
678 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
679 |
|
|
NextStTag <= st_Ready;
|
680 |
|
|
end if;
|
681 |
|
|
elsif CommDone = cmd_Ack then
|
682 |
|
|
if RN16_r = RN16Handler then
|
683 |
|
|
NextStTag <= st_Secured_ACK_GetPC;
|
684 |
|
|
else
|
685 |
|
|
NextStTag <= st_Arbitrate;
|
686 |
|
|
end if;
|
687 |
|
|
elsif CommDone = cmd_Nak then
|
688 |
|
|
NextStTag <= st_Arbitrate;
|
689 |
|
|
elsif CommDone = cmd_ReqRN then
|
690 |
|
|
if RN16_r = RN16Handler then
|
691 |
|
|
NextStTag <= st_Secured_RRN_LoadHandler_AND_SaveRN;
|
692 |
|
|
end if;
|
693 |
|
|
-- Select Command behaves always as in the Ready state!
|
694 |
|
|
elsif CommDone = cmd_Select then
|
695 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
696 |
|
|
NextStTag <= st_Ready_SEL_GetWord;
|
697 |
|
|
else
|
698 |
|
|
NextStTag <= st_Ready_SEL_NonMatchingTag;
|
699 |
|
|
end if;
|
700 |
|
|
elsif CommDone = cmd_Write then
|
701 |
|
|
if RN16_r = RN16Handler then
|
702 |
|
|
NextStTag <= st_Secured_WR_CheckMemoryBounds;
|
703 |
|
|
end if;
|
704 |
|
|
elsif CommDone = cmd_Read then
|
705 |
|
|
if RN16_r = RN16Handler then
|
706 |
|
|
NextStTag <= st_Secured_RD_CheckMemoryBounds;
|
707 |
|
|
end if;
|
708 |
|
|
-- elsif CommDone = cmd_Kill then -- See kill flowchart pg.60 (EPC Standard)
|
709 |
|
|
-- if "Valid handle" then
|
710 |
|
|
-- if "Kill Password != 0" then
|
711 |
|
|
-- if "Valid Kill Password" then
|
712 |
|
|
-- NextStTag <= st_Killed;
|
713 |
|
|
-- else
|
714 |
|
|
-- NextStTag <= st_Arbitrate;
|
715 |
|
|
-- end if;
|
716 |
|
|
-- end if;
|
717 |
|
|
-- end if;
|
718 |
|
|
-- elsif CommDone = cmd_Access then -- See Access flowchart pg.63 (EPC Standard)
|
719 |
|
|
-- if "Valid Handle" then
|
720 |
|
|
-- if "Valid Access Password" then
|
721 |
|
|
-- NextStTag <= st_Secured;
|
722 |
|
|
-- else
|
723 |
|
|
-- NextStTag <= st_Arbitrate;
|
724 |
|
|
-- end if;
|
725 |
|
|
-- end if;
|
726 |
|
|
elsif CommDone = cmd_Invalid then -- See state & note pg.74
|
727 |
|
|
NextStTag <= st_Arbitrate;
|
728 |
|
|
end if;
|
729 |
|
|
|
730 |
|
|
when st_Secured_RRN_LoadHandler_AND_SaveRN =>
|
731 |
|
|
if mem_RB = '1' then
|
732 |
|
|
NextStTag <= st_Secured_RRN_BackscatterHandler_AND_SaveRN;
|
733 |
|
|
end if;
|
734 |
|
|
|
735 |
|
|
when st_Secured_RRN_BackscatterHandler_AND_SaveRN =>
|
736 |
|
|
if mem_RB = '1' then
|
737 |
|
|
NextStTag <= st_Secured;
|
738 |
|
|
end if;
|
739 |
|
|
|
740 |
|
|
when st_Secured_ACK_GetPC =>
|
741 |
|
|
if mem_RB = '1' then
|
742 |
|
|
NextStTag <= st_Secured_ACK_SendPC_AND_DecodeEPCLength;
|
743 |
|
|
end if;
|
744 |
|
|
|
745 |
|
|
when st_Secured_ACK_SendPC_AND_DecodeEPCLength =>
|
746 |
|
|
if mem_RB = '1' then
|
747 |
|
|
NextStTag <= st_Secured_ACK_GetAndSendEPC;
|
748 |
|
|
end if;
|
749 |
|
|
|
750 |
|
|
when st_Secured_ACK_GetAndSendEPC =>
|
751 |
|
|
if mem_RB = '1' then
|
752 |
|
|
if unsigned(GPR) /= 0 then
|
753 |
|
|
NextStTag <= st_Secured_ACK_GetAndSendEPC;
|
754 |
|
|
else
|
755 |
|
|
NextStTag <= st_Secured_ACK_GetAndSendCRC16;
|
756 |
|
|
end if;
|
757 |
|
|
end if;
|
758 |
|
|
|
759 |
|
|
when st_Secured_ACK_GetAndSendCRC16 =>
|
760 |
|
|
if mem_RB = '1' then
|
761 |
|
|
NextStTag <= st_Secured;
|
762 |
|
|
end if;
|
763 |
|
|
|
764 |
|
|
when st_Secured_WR_CheckMemoryBounds =>
|
765 |
|
|
if Write_Address_Pointer_Length_OK = '1' then
|
766 |
|
|
NextStTag <= st_Secured_WR_WriteWord;
|
767 |
|
|
else
|
768 |
|
|
NextStTag <= st_Secured;
|
769 |
|
|
end if;
|
770 |
|
|
|
771 |
|
|
when st_Secured_WR_WriteWord =>
|
772 |
|
|
if mem_RB = '1' then
|
773 |
|
|
NextStTag <= st_Secured_WR_WriteIsDone;
|
774 |
|
|
end if;
|
775 |
|
|
|
776 |
|
|
when st_Secured_WR_WriteIsDone =>
|
777 |
|
|
if mem_RB = '1' then
|
778 |
|
|
NextStTag <= st_Secured;
|
779 |
|
|
end if;
|
780 |
|
|
|
781 |
|
|
when st_Secured_RD_CheckMemoryBounds =>
|
782 |
|
|
if Read_Address_Pointer_Length_OK = '1' then
|
783 |
|
|
NextStTag <= st_Secured_RD_ReadMemory;
|
784 |
|
|
else
|
785 |
|
|
NextStTag <= st_Secured;
|
786 |
|
|
end if;
|
787 |
|
|
|
788 |
|
|
when st_Secured_RD_ReadMemory =>
|
789 |
|
|
if mem_RB = '1' then
|
790 |
|
|
NextStTag <= st_Secured_RD_Read_AND_Send;
|
791 |
|
|
end if;
|
792 |
|
|
|
793 |
|
|
when st_Secured_RD_Read_AND_Send =>
|
794 |
|
|
if mem_RB = '1' then
|
795 |
|
|
if unsigned(GPR) /= 0 then
|
796 |
|
|
NextStTag <= st_Secured_RD_Read_AND_Send;
|
797 |
|
|
else
|
798 |
|
|
NextStTag <= st_Secured_RD_SendLast;
|
799 |
|
|
end if;
|
800 |
|
|
end if;
|
801 |
|
|
|
802 |
|
|
when st_Secured_RD_SendLast =>
|
803 |
|
|
if mem_RB = '1' then
|
804 |
|
|
NextStTag <= st_Secured_RD_SendHandle;
|
805 |
|
|
end if;
|
806 |
|
|
|
807 |
|
|
when st_Secured_RD_SendHandle =>
|
808 |
|
|
NextStTag <= st_Secured;
|
809 |
|
|
|
810 |
|
|
-----------------------------------------------------------------------
|
811 |
|
|
-- KILLED (in next state process)
|
812 |
|
|
-----------------------------------------------------------------------
|
813 |
|
|
when st_Killed =>
|
814 |
|
|
NextStTag <= st_Killed;
|
815 |
|
|
|
816 |
|
|
when others => null;
|
817 |
|
|
end case;
|
818 |
|
|
end process NEXT_ST;
|
819 |
|
|
|
820 |
|
|
|
821 |
|
|
-------------------------------------------------------------------------------
|
822 |
|
|
-------------------------------------------------------------------------------
|
823 |
|
|
-- OUTPUT DECODER PROCESS
|
824 |
|
|
-------------------------------------------------------------------------------
|
825 |
|
|
-------------------------------------------------------------------------------
|
826 |
|
|
OUTPUT_DEC : process (StTag, CommDone, mem_RB, RN16Handler, GPR, Slot, CurrSession, CurrQ, mem_DTO, Query_SelectFlag_Match,
|
827 |
|
|
Query_InventoryFlag_Match, Select_Address_Pointer_Length_OK, SlotIsZero, Write_Address_Pointer_Length_OK,
|
828 |
|
|
Read_Address_Pointer_Length_OK, Data_r, Pointer_r, Length_r, SLOT_VALUE, rng_cout, GCounter2, GCounter,
|
829 |
|
|
ADRint, SelQ, RN16_r, SInvQ)
|
830 |
|
|
begin -- process OUTPUT_DEC
|
831 |
|
|
RN16Handler_i <= RN16Handler;
|
832 |
|
|
GPR_i <= GPR;
|
833 |
|
|
Slot_i <= Slot;
|
834 |
|
|
mem_DTI_i <= (others => '0');
|
835 |
|
|
mem_WR_i <= '0';
|
836 |
|
|
mem_RD_i <= '0';
|
837 |
|
|
mem_ADR_i <= (others => '0');
|
838 |
|
|
mem_BANK_i <= (others => '0');
|
839 |
|
|
rng_cin_i <= (others => '0');
|
840 |
|
|
rng_init_i <= '0';
|
841 |
|
|
rng_ce_i <= '0';
|
842 |
|
|
CurrSession_i <= CurrSession;
|
843 |
|
|
CurrQ_i <= CurrQ;
|
844 |
|
|
FirstCompWord_i <= '0';
|
845 |
|
|
GCounter_i <= (others => '0');
|
846 |
|
|
GCounter2_i <= (others => '0');
|
847 |
|
|
ADRint_i <= (others => '0');
|
848 |
|
|
-- SEL & Inventory Flags
|
849 |
|
|
SelD <= '0';
|
850 |
|
|
SelCE <= '0';
|
851 |
|
|
SInvD <= (others => '0');
|
852 |
|
|
SInvCE <= (others => '0');
|
853 |
|
|
-- Transmitter
|
854 |
|
|
trm_cmd_i <= trmcmd_Null;
|
855 |
|
|
trm_buf_i <= (others => '0');
|
856 |
|
|
|
857 |
|
|
case StTag is
|
858 |
|
|
-----------------------------------------------------------------------
|
859 |
|
|
-- POWERUP (in output process)
|
860 |
|
|
-----------------------------------------------------------------------
|
861 |
|
|
when st_PowerUp =>
|
862 |
|
|
if mem_RB = '1' then
|
863 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB;
|
864 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
865 |
|
|
mem_RD_i <= '1';
|
866 |
|
|
end if;
|
867 |
|
|
|
868 |
|
|
when st_PowerUp_GetFlagMSB =>
|
869 |
|
|
if mem_RB = '1' then
|
870 |
|
|
GPR_i(31 downto 16) <= mem_DTO;
|
871 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB + '1';
|
872 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
873 |
|
|
mem_RD_i <= '1';
|
874 |
|
|
end if;
|
875 |
|
|
|
876 |
|
|
when st_PowerUp_GetFlagLSB =>
|
877 |
|
|
if mem_RB = '1' then
|
878 |
|
|
GPR_i(15 downto 0) <= mem_DTO;
|
879 |
|
|
end if;
|
880 |
|
|
|
881 |
|
|
when st_PowerUp_LoadRNG =>
|
882 |
|
|
rng_init_i <= '1';
|
883 |
|
|
rng_cin_i <= GPR(30 downto 0);
|
884 |
|
|
-----------------------------------------------------------------------
|
885 |
|
|
-- READY (in output process)
|
886 |
|
|
-----------------------------------------------------------------------
|
887 |
|
|
when st_Ready =>
|
888 |
|
|
if CommDone = cmd_Query then
|
889 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1' then
|
890 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
891 |
|
|
CurrSession_i <= Data_r(6 downto 5);
|
892 |
|
|
CurrQ_i <= Data_r(3 downto 0);
|
893 |
|
|
end if;
|
894 |
|
|
elsif CommDone = cmd_Select then
|
895 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
896 |
|
|
ADRint_i(11 downto 0) <= Pointer_r(15 downto 4);
|
897 |
|
|
-- CompLSBit_i <= Pointer_r(3 downto 0);
|
898 |
|
|
GCounter_i <= Length_r;
|
899 |
|
|
end if;
|
900 |
|
|
end if;
|
901 |
|
|
|
902 |
|
|
when st_Ready_QRY_LoadSlot_AND_SaveRN =>
|
903 |
|
|
if mem_RB = '1' then
|
904 |
|
|
Slot_i <= SLOT_VALUE;
|
905 |
|
|
mem_DTI_i <= rng_cout(15 downto 0);
|
906 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB + '1';
|
907 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
908 |
|
|
mem_WR_i <= '1';
|
909 |
|
|
end if;
|
910 |
|
|
|
911 |
|
|
when st_Ready_QRY_CheckSlot_AND_SaveRN =>
|
912 |
|
|
if mem_RB = '1' then
|
913 |
|
|
mem_DTI_i <= '0' & rng_cout(30 downto 16);
|
914 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB;
|
915 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
916 |
|
|
mem_WR_i <= '1';
|
917 |
|
|
if SlotIsZero = '1' then
|
918 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
919 |
|
|
end if;
|
920 |
|
|
end if;
|
921 |
|
|
|
922 |
|
|
when st_Ready_QRY_LoadRN16Handler_AND_SaveRN =>
|
923 |
|
|
if mem_RB = '1' then
|
924 |
|
|
RN16Handler_i <= rng_cout(15 downto 0);
|
925 |
|
|
mem_DTI_i <= rng_cout(15 downto 0);
|
926 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB + '1';
|
927 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
928 |
|
|
mem_WR_i <= '1';
|
929 |
|
|
end if;
|
930 |
|
|
|
931 |
|
|
when st_Ready_QRY_BackscatterRN16_AND_SaveRN =>
|
932 |
|
|
if mem_RB = '1' then
|
933 |
|
|
mem_DTI_i <= '0' & rng_cout(30 downto 16);
|
934 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB;
|
935 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
936 |
|
|
mem_WR_i <= '1';
|
937 |
|
|
-- Backscatter RN16
|
938 |
|
|
trm_cmd_i <= trmcmd_Send;
|
939 |
|
|
trm_buf_i <= RN16Handler;
|
940 |
|
|
end if;
|
941 |
|
|
|
942 |
|
|
-- NOTE: Select command does not support
|
943 |
|
|
-- "bit" comparison. Comparison starts at
|
944 |
|
|
-- the beginning of a Word!!
|
945 |
|
|
when st_Ready_SEL_GetWord =>
|
946 |
|
|
GCounter2_i <= GCounter2; -- Number of bits already compared
|
947 |
|
|
GCounter_i <= GCounter; -- Number of bits to compare
|
948 |
|
|
ADRint_i <= ADRint;
|
949 |
|
|
-- CompLSBit_i <= CompLSBit; -- Starting bits (unused within this version)
|
950 |
|
|
if mem_RB = '1' then
|
951 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
952 |
|
|
mem_BANK_i <= Data_r(2 downto 1);
|
953 |
|
|
mem_RD_i <= '1';
|
954 |
|
|
end if;
|
955 |
|
|
|
956 |
|
|
when st_Ready_SEL_PrepareComparison =>
|
957 |
|
|
GCounter2_i <= GCounter2; -- Number of bits already compared
|
958 |
|
|
GCounter_i <= GCounter; -- Number of bits to compare
|
959 |
|
|
ADRint_i <= ADRint;
|
960 |
|
|
if mem_RB = '1' then
|
961 |
|
|
ADRint_i <= ADRint + 1; -- prepare next word address
|
962 |
|
|
GPR_i(15 downto 0) <= mem_DTO;
|
963 |
|
|
end if;
|
964 |
|
|
|
965 |
|
|
when st_Ready_SEL_CompareWords =>
|
966 |
|
|
GCounter2_i <= GCounter2 + conv_std_logic_vector(16, 8); -- Number of bits already compared
|
967 |
|
|
GCounter_i <= GCounter - conv_std_logic_vector(16, 8); -- Number of Bits to compare
|
968 |
|
|
ADRint_i <= ADRint;
|
969 |
|
|
|
970 |
|
|
when st_Ready_SEL_CompareBits =>
|
971 |
|
|
GCounter2_i <= GCounter2 + conv_std_logic_vector(unsigned(GCounter), 8); -- Number of bits already compared
|
972 |
|
|
GCounter_i <= GCounter - conv_std_logic_vector(unsigned(GCounter), 8); -- Number of Bits to compare
|
973 |
|
|
ADRint_i <= ADRint;
|
974 |
|
|
|
975 |
|
|
when st_Ready_SEL_MatchingTag =>
|
976 |
|
|
case Data_r(5 downto 3) is -- Action
|
977 |
|
|
when "000" =>
|
978 |
|
|
if Data_r(8) = '1' then
|
979 |
|
|
if Data_r(7 downto 6) = "00" then
|
980 |
|
|
SelD <= '1';
|
981 |
|
|
SelCE <= '1';
|
982 |
|
|
end if;
|
983 |
|
|
else
|
984 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '0'; -- -> A
|
985 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
986 |
|
|
end if;
|
987 |
|
|
when "001" =>
|
988 |
|
|
if Data_r(8) = '1' then
|
989 |
|
|
if Data_r(7 downto 6) = "00" then
|
990 |
|
|
SelD <= '1';
|
991 |
|
|
SelCE <= '1';
|
992 |
|
|
end if;
|
993 |
|
|
else
|
994 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '0'; -- -> A
|
995 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
996 |
|
|
end if;
|
997 |
|
|
when "011" =>
|
998 |
|
|
if Data_r(8) = '1' then
|
999 |
|
|
if Data_r(7 downto 6) = "00" then
|
1000 |
|
|
SelD <= not(SelQ);
|
1001 |
|
|
SelCE <= '1';
|
1002 |
|
|
end if;
|
1003 |
|
|
else
|
1004 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= not(SInvQ(conv_integer(Data_r(7 downto 6)))); -- -> negate
|
1005 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1006 |
|
|
end if;
|
1007 |
|
|
when "100" =>
|
1008 |
|
|
if Data_r(8) = '1' then
|
1009 |
|
|
if Data_r(7 downto 6) = "00" then
|
1010 |
|
|
SelD <= '0';
|
1011 |
|
|
SelCE <= '1';
|
1012 |
|
|
end if;
|
1013 |
|
|
else
|
1014 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '1'; -- -> B
|
1015 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1016 |
|
|
end if;
|
1017 |
|
|
when "101" =>
|
1018 |
|
|
if Data_r(8) = '1' then
|
1019 |
|
|
if Data_r(7 downto 6) = "00" then
|
1020 |
|
|
SelD <= '0';
|
1021 |
|
|
SelCE <= '1';
|
1022 |
|
|
end if;
|
1023 |
|
|
else
|
1024 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '1'; -- -> B
|
1025 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1026 |
|
|
end if;
|
1027 |
|
|
when others => null;
|
1028 |
|
|
end case;
|
1029 |
|
|
|
1030 |
|
|
when st_Ready_SEL_NonMatchingTag =>
|
1031 |
|
|
case Data_r(5 downto 3) is -- Action
|
1032 |
|
|
when "000" =>
|
1033 |
|
|
if Data_r(8) = '1' then
|
1034 |
|
|
if Data_r(7 downto 6) = "00" then
|
1035 |
|
|
SelD <= '0';
|
1036 |
|
|
SelCE <= '1';
|
1037 |
|
|
end if;
|
1038 |
|
|
else
|
1039 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '1'; -- -> B
|
1040 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1041 |
|
|
end if;
|
1042 |
|
|
when "010" =>
|
1043 |
|
|
if Data_r(8) = '1' then
|
1044 |
|
|
if Data_r(7 downto 6) = "00" then
|
1045 |
|
|
SelD <= '0';
|
1046 |
|
|
SelCE <= '1';
|
1047 |
|
|
end if;
|
1048 |
|
|
else
|
1049 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '1'; -- -> B
|
1050 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1051 |
|
|
end if;
|
1052 |
|
|
when "100" =>
|
1053 |
|
|
if Data_r(8) = '1' then
|
1054 |
|
|
if Data_r(7 downto 6) = "00" then
|
1055 |
|
|
SelD <= '1';
|
1056 |
|
|
SelCE <= '1';
|
1057 |
|
|
end if;
|
1058 |
|
|
else
|
1059 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '0'; -- -> A
|
1060 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1061 |
|
|
end if;
|
1062 |
|
|
when "110" =>
|
1063 |
|
|
if Data_r(8) = '1' then
|
1064 |
|
|
if Data_r(7 downto 6) = "00" then
|
1065 |
|
|
SelD <= '1';
|
1066 |
|
|
SelCE <= '1';
|
1067 |
|
|
end if;
|
1068 |
|
|
else
|
1069 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= '0'; -- -> A
|
1070 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1071 |
|
|
end if;
|
1072 |
|
|
when "111" =>
|
1073 |
|
|
if Data_r(8) = '1' then
|
1074 |
|
|
if Data_r(7 downto 6) = "00" then
|
1075 |
|
|
SelD <= not(SelQ);
|
1076 |
|
|
SelCE <= '1';
|
1077 |
|
|
end if;
|
1078 |
|
|
else
|
1079 |
|
|
SInvD(conv_integer(Data_r(7 downto 6))) <= not(SInvQ(conv_integer(Data_r(7 downto 6)))); -- -> negate
|
1080 |
|
|
SInvCE(conv_integer(Data_r(7 downto 6))) <= '1';
|
1081 |
|
|
end if;
|
1082 |
|
|
when others => null;
|
1083 |
|
|
end case;
|
1084 |
|
|
-----------------------------------------------------------------------
|
1085 |
|
|
-- ARBITRATE (in output process)
|
1086 |
|
|
-----------------------------------------------------------------------
|
1087 |
|
|
when st_Arbitrate =>
|
1088 |
|
|
if CommDone = cmd_Query then
|
1089 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1' then
|
1090 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1091 |
|
|
CurrSession_i <= Data_r(6 downto 5);
|
1092 |
|
|
CurrQ_i <= Data_r(3 downto 0);
|
1093 |
|
|
end if;
|
1094 |
|
|
elsif CommDone = cmd_QueryRep then
|
1095 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
1096 |
|
|
Slot_i <= Slot - '1';
|
1097 |
|
|
end if;
|
1098 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
1099 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
1100 |
|
|
if Data_r(2 downto 0) = "000" then -- Q = Q
|
1101 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1102 |
|
|
elsif Data_r(2 downto 0) = "110"then -- Q = Q + 1
|
1103 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1104 |
|
|
if CurrQ /= "1111" then
|
1105 |
|
|
CurrQ_i <= CurrQ + '1';
|
1106 |
|
|
end if;
|
1107 |
|
|
elsif Data_r(2 downto 0) = "011" then -- Q = Q - 1
|
1108 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1109 |
|
|
if CurrQ /= "0000" then
|
1110 |
|
|
CurrQ_i <= CurrQ - '1';
|
1111 |
|
|
end if;
|
1112 |
|
|
end if;
|
1113 |
|
|
end if;
|
1114 |
|
|
elsif CommDone = cmd_Select then
|
1115 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
1116 |
|
|
ADRint_i(11 downto 0) <= Pointer_r(15 downto 4);
|
1117 |
|
|
-- CompLSBit_i <= Pointer_r(3 downto 0);
|
1118 |
|
|
GCounter_i <= Length_r;
|
1119 |
|
|
end if;
|
1120 |
|
|
end if;
|
1121 |
|
|
|
1122 |
|
|
when st_Arbitrate_QRR_CheckSlot =>
|
1123 |
|
|
if SlotIsZero = '1' then
|
1124 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1125 |
|
|
end if;
|
1126 |
|
|
|
1127 |
|
|
-----------------------------------------------------------------------
|
1128 |
|
|
-- REPLY (in output process)
|
1129 |
|
|
-----------------------------------------------------------------------
|
1130 |
|
|
when st_Reply =>
|
1131 |
|
|
if CommDone = cmd_Query then
|
1132 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1' then
|
1133 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1134 |
|
|
CurrSession_i <= Data_r(6 downto 5);
|
1135 |
|
|
CurrQ_i <= Data_r(3 downto 0);
|
1136 |
|
|
end if;
|
1137 |
|
|
elsif CommDone = cmd_QueryRep then
|
1138 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
1139 |
|
|
Slot_i <= Slot - '1';
|
1140 |
|
|
end if;
|
1141 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
1142 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
1143 |
|
|
if Data_r(2 downto 0) = "000" then -- Q = Q
|
1144 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1145 |
|
|
elsif Data_r(2 downto 0) = "110"then -- Q = Q + 1
|
1146 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1147 |
|
|
if CurrQ /= "1111" then
|
1148 |
|
|
CurrQ_i <= CurrQ + '1';
|
1149 |
|
|
end if;
|
1150 |
|
|
elsif Data_r(2 downto 0) = "011" then -- Q = Q - 1
|
1151 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1152 |
|
|
if CurrQ /= "0000" then
|
1153 |
|
|
CurrQ_i <= CurrQ - '1';
|
1154 |
|
|
end if;
|
1155 |
|
|
end if;
|
1156 |
|
|
end if;
|
1157 |
|
|
elsif CommDone = cmd_Select then
|
1158 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
1159 |
|
|
ADRint_i(11 downto 0) <= Pointer_r(15 downto 4);
|
1160 |
|
|
-- CompLSBit_i <= Pointer_r(3 downto 0);
|
1161 |
|
|
GCounter_i <= Length_r;
|
1162 |
|
|
end if;
|
1163 |
|
|
elsif CommDone = cmd_Ack then
|
1164 |
|
|
if RN16_r = RN16Handler then
|
1165 |
|
|
ADRint_i <= MEMORY_PC_ADDRESS_16b;
|
1166 |
|
|
end if;
|
1167 |
|
|
end if;
|
1168 |
|
|
|
1169 |
|
|
when st_Reply_ACK_GetPC =>
|
1170 |
|
|
ADRint_i <= ADRint;
|
1171 |
|
|
if mem_RB = '1' then
|
1172 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1173 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1174 |
|
|
mem_RD_i <= '1';
|
1175 |
|
|
ADRint_i <= ADRint + '1';
|
1176 |
|
|
GPR_i <= (others => '0');
|
1177 |
|
|
end if;
|
1178 |
|
|
|
1179 |
|
|
when st_Reply_ACK_SendPC_AND_DecodeEPCLength =>
|
1180 |
|
|
ADRint_i <= ADRint;
|
1181 |
|
|
if mem_RB = '1' then
|
1182 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1183 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1184 |
|
|
ADRint_i <= ADRint + '1';
|
1185 |
|
|
mem_RD_i <= '1';
|
1186 |
|
|
-- GPR_i(4 downto 0) <= mem_DTO(0 to 4); --Length of the PC+EPC (in words)
|
1187 |
|
|
GPR_i(4) <= mem_DTO(0);
|
1188 |
|
|
GPR_i(3) <= mem_DTO(1);
|
1189 |
|
|
GPR_i(2) <= mem_DTO(2);
|
1190 |
|
|
GPR_i(1) <= mem_DTO(3);
|
1191 |
|
|
GPR_i(0) <= mem_DTO(4);
|
1192 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1193 |
|
|
trm_buf_i <= mem_DTO;
|
1194 |
|
|
end if;
|
1195 |
|
|
|
1196 |
|
|
when st_Reply_ACK_GetAndSendEPC =>
|
1197 |
|
|
ADRint_i <= ADRint;
|
1198 |
|
|
if mem_RB = '1' then
|
1199 |
|
|
if unsigned(GPR) /= 0 then
|
1200 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1201 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1202 |
|
|
ADRint_i <= ADRint + '1';
|
1203 |
|
|
mem_RD_i <= '1';
|
1204 |
|
|
GPR_i <= GPR - '1';
|
1205 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1206 |
|
|
trm_buf_i <= mem_DTO;
|
1207 |
|
|
else
|
1208 |
|
|
mem_ADR_i <= MEMORY_CRC16_ADDRESS;
|
1209 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1210 |
|
|
mem_RD_i <= '1';
|
1211 |
|
|
end if;
|
1212 |
|
|
end if;
|
1213 |
|
|
|
1214 |
|
|
when st_Reply_ACK_GetAndSendCRC16 =>
|
1215 |
|
|
if mem_RB = '1' then
|
1216 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1217 |
|
|
trm_buf_i <= mem_DTO;
|
1218 |
|
|
end if;
|
1219 |
|
|
|
1220 |
|
|
-----------------------------------------------------------------------
|
1221 |
|
|
-- ACKNOWLEDGED (in output process)
|
1222 |
|
|
-----------------------------------------------------------------------
|
1223 |
|
|
when st_Acknowledged =>
|
1224 |
|
|
if CommDone = cmd_Query then
|
1225 |
|
|
if Data_r(6 downto 5) = CurrSession then --TODO: Verify flags refresh in one clockcycle. -- Toggle inventoried flag
|
1226 |
|
|
case CurrSession is
|
1227 |
|
|
when "00" =>
|
1228 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1229 |
|
|
SInvCE(0) <= '1';
|
1230 |
|
|
when "01" =>
|
1231 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1232 |
|
|
SInvCE(1) <= '1';
|
1233 |
|
|
when "10" =>
|
1234 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1235 |
|
|
SInvCE(2) <= '1';
|
1236 |
|
|
when "11" =>
|
1237 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1238 |
|
|
SInvCE(3) <= '1';
|
1239 |
|
|
when others => null;
|
1240 |
|
|
end case;
|
1241 |
|
|
end if;
|
1242 |
|
|
elsif CommDone = cmd_QueryRep then
|
1243 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
1244 |
|
|
-- Toggle inventoried flag
|
1245 |
|
|
case CurrSession is
|
1246 |
|
|
when "00" =>
|
1247 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1248 |
|
|
SInvCE(0) <= '1';
|
1249 |
|
|
when "01" =>
|
1250 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1251 |
|
|
SInvCE(1) <= '1';
|
1252 |
|
|
when "10" =>
|
1253 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1254 |
|
|
SInvCE(2) <= '1';
|
1255 |
|
|
when "11" =>
|
1256 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1257 |
|
|
SInvCE(3) <= '1';
|
1258 |
|
|
when others => null;
|
1259 |
|
|
end case;
|
1260 |
|
|
end if;
|
1261 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
1262 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
1263 |
|
|
-- Toggle inventoried flag
|
1264 |
|
|
case CurrSession is
|
1265 |
|
|
when "00" =>
|
1266 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1267 |
|
|
SInvCE(0) <= '1';
|
1268 |
|
|
when "01" =>
|
1269 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1270 |
|
|
SInvCE(1) <= '1';
|
1271 |
|
|
when "10" =>
|
1272 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1273 |
|
|
SInvCE(2) <= '1';
|
1274 |
|
|
when "11" =>
|
1275 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1276 |
|
|
SInvCE(3) <= '1';
|
1277 |
|
|
when others => null;
|
1278 |
|
|
end case;
|
1279 |
|
|
end if;
|
1280 |
|
|
elsif CommDone = cmd_Ack then
|
1281 |
|
|
if RN16_r = RN16Handler then
|
1282 |
|
|
ADRint_i <= MEMORY_PC_ADDRESS_16b;
|
1283 |
|
|
end if;
|
1284 |
|
|
elsif CommDone = cmd_ReqRN then
|
1285 |
|
|
if RN16_r = RN16Handler then
|
1286 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1287 |
|
|
end if;
|
1288 |
|
|
elsif CommDone = cmd_Select then
|
1289 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
1290 |
|
|
ADRint_i(11 downto 0) <= Pointer_r(15 downto 4);
|
1291 |
|
|
-- CompLSBit_i <= Pointer_r(3 downto 0);
|
1292 |
|
|
GCounter_i <= Length_r;
|
1293 |
|
|
end if;
|
1294 |
|
|
end if;
|
1295 |
|
|
|
1296 |
|
|
when st_Acknowledged_QRY_CheckFlags =>
|
1297 |
|
|
if Query_SelectFlag_Match = '1' and Query_InventoryFlag_Match = '1' then
|
1298 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1299 |
|
|
CurrSession_i <= Data_r(6 downto 5);
|
1300 |
|
|
CurrQ_i <= Data_r(3 downto 0);
|
1301 |
|
|
end if;
|
1302 |
|
|
|
1303 |
|
|
when st_Acknowledged_RRN_LoadHandler_AND_SaveRN =>
|
1304 |
|
|
if mem_RB = '1' then
|
1305 |
|
|
RN16Handler_i <= rng_cout(15 downto 0);
|
1306 |
|
|
mem_DTI_i <= rng_cout(15 downto 0);
|
1307 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB + '1';
|
1308 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
1309 |
|
|
mem_WR_i <= '1';
|
1310 |
|
|
end if;
|
1311 |
|
|
|
1312 |
|
|
when st_Acknowledged_RRN_BackscatterHandler_AND_SaveRN =>
|
1313 |
|
|
if mem_RB = '1' then
|
1314 |
|
|
mem_DTI_i <= '0' & rng_cout(30 downto 16);
|
1315 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB;
|
1316 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
1317 |
|
|
mem_WR_i <= '1';
|
1318 |
|
|
-- Backscatter RN16
|
1319 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1320 |
|
|
trm_buf_i <= RN16Handler;
|
1321 |
|
|
end if;
|
1322 |
|
|
|
1323 |
|
|
-----------------------------------------------------------------------
|
1324 |
|
|
-- OPEN (in output process)
|
1325 |
|
|
-----------------------------------------------------------------------
|
1326 |
|
|
when st_Open =>
|
1327 |
|
|
if CommDone = cmd_Query then
|
1328 |
|
|
if Data_r(6 downto 5) = CurrSession then --TODO: Verify flags refresh in one clockcycle.
|
1329 |
|
|
-- Toggle inventoried flag
|
1330 |
|
|
case CurrSession is
|
1331 |
|
|
when "00" =>
|
1332 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1333 |
|
|
SInvCE(0) <= '1';
|
1334 |
|
|
when "01" =>
|
1335 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1336 |
|
|
SInvCE(1) <= '1';
|
1337 |
|
|
when "10" =>
|
1338 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1339 |
|
|
SInvCE(2) <= '1';
|
1340 |
|
|
when "11" =>
|
1341 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1342 |
|
|
SInvCE(3) <= '1';
|
1343 |
|
|
when others => null;
|
1344 |
|
|
end case;
|
1345 |
|
|
end if;
|
1346 |
|
|
elsif CommDone = cmd_QueryRep then
|
1347 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
1348 |
|
|
-- Toggle inventoried flag
|
1349 |
|
|
case CurrSession is
|
1350 |
|
|
when "00" =>
|
1351 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1352 |
|
|
SInvCE(0) <= '1';
|
1353 |
|
|
when "01" =>
|
1354 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1355 |
|
|
SInvCE(1) <= '1';
|
1356 |
|
|
when "10" =>
|
1357 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1358 |
|
|
SInvCE(2) <= '1';
|
1359 |
|
|
when "11" =>
|
1360 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1361 |
|
|
SInvCE(3) <= '1';
|
1362 |
|
|
when others => null;
|
1363 |
|
|
end case;
|
1364 |
|
|
end if;
|
1365 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
1366 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
1367 |
|
|
-- Toggle inventoried flag
|
1368 |
|
|
case CurrSession is
|
1369 |
|
|
when "00" =>
|
1370 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1371 |
|
|
SInvCE(0) <= '1';
|
1372 |
|
|
when "01" =>
|
1373 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1374 |
|
|
SInvCE(1) <= '1';
|
1375 |
|
|
when "10" =>
|
1376 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1377 |
|
|
SInvCE(2) <= '1';
|
1378 |
|
|
when "11" =>
|
1379 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1380 |
|
|
SInvCE(3) <= '1';
|
1381 |
|
|
when others => null;
|
1382 |
|
|
end case;
|
1383 |
|
|
end if;
|
1384 |
|
|
elsif CommDone = cmd_Ack then
|
1385 |
|
|
if RN16_r = RN16Handler then
|
1386 |
|
|
ADRint_i <= MEMORY_PC_ADDRESS_16b;
|
1387 |
|
|
end if;
|
1388 |
|
|
elsif CommDone = cmd_ReqRN then
|
1389 |
|
|
if RN16_r = RN16Handler then
|
1390 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1391 |
|
|
end if;
|
1392 |
|
|
elsif CommDone = cmd_Select then
|
1393 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
1394 |
|
|
ADRint_i(11 downto 0) <= Pointer_r(15 downto 4);
|
1395 |
|
|
-- CompLSBit_i <= Pointer_r(3 downto 0);
|
1396 |
|
|
GCounter_i <= Length_r;
|
1397 |
|
|
end if;
|
1398 |
|
|
end if;
|
1399 |
|
|
|
1400 |
|
|
when st_Open_ACK_GetPC =>
|
1401 |
|
|
ADRint_i <= ADRint;
|
1402 |
|
|
if mem_RB = '1' then
|
1403 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1404 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1405 |
|
|
ADRint_i <= ADRint + '1';
|
1406 |
|
|
mem_RD_i <= '1';
|
1407 |
|
|
GPR_i <= (others => '0');
|
1408 |
|
|
end if;
|
1409 |
|
|
|
1410 |
|
|
when st_Open_ACK_SendPC_AND_DecodeEPCLength =>
|
1411 |
|
|
ADRint_i <= ADRint;
|
1412 |
|
|
if mem_RB = '1' then
|
1413 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1414 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1415 |
|
|
ADRint_i <= ADRint + '1';
|
1416 |
|
|
mem_RD_i <= '1';
|
1417 |
|
|
-- GPR_i(4 downto 0) <= mem_DTO(0 to 4); --Length of the PC+EPC (in words)
|
1418 |
|
|
GPR_i(4) <= mem_DTO(0);
|
1419 |
|
|
GPR_i(3) <= mem_DTO(1);
|
1420 |
|
|
GPR_i(2) <= mem_DTO(2);
|
1421 |
|
|
GPR_i(1) <= mem_DTO(3);
|
1422 |
|
|
GPR_i(0) <= mem_DTO(4);
|
1423 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1424 |
|
|
trm_buf_i <= mem_DTO;
|
1425 |
|
|
end if;
|
1426 |
|
|
|
1427 |
|
|
when st_Open_ACK_GetAndSendEPC =>
|
1428 |
|
|
ADRint_i <= ADRint;
|
1429 |
|
|
if mem_RB = '1' then
|
1430 |
|
|
if unsigned(GPR) /= 0 then
|
1431 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1432 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1433 |
|
|
ADRint_i <= ADRint + '1';
|
1434 |
|
|
mem_RD_i <= '1';
|
1435 |
|
|
GPR_i <= GPR - '1';
|
1436 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1437 |
|
|
trm_buf_i <= mem_DTO;
|
1438 |
|
|
else
|
1439 |
|
|
mem_ADR_i <= MEMORY_CRC16_ADDRESS;
|
1440 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1441 |
|
|
mem_RD_i <= '1';
|
1442 |
|
|
end if;
|
1443 |
|
|
end if;
|
1444 |
|
|
|
1445 |
|
|
when st_Open_ACK_GetAndSendCRC16 =>
|
1446 |
|
|
if mem_RB = '1' then
|
1447 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1448 |
|
|
trm_buf_i <= mem_DTO;
|
1449 |
|
|
end if;
|
1450 |
|
|
|
1451 |
|
|
when st_Open_RRN_LoadHandler_AND_SaveRN =>
|
1452 |
|
|
if mem_RB = '1' then
|
1453 |
|
|
RN16Handler_i <= rng_cout(15 downto 0);
|
1454 |
|
|
mem_DTI_i <= rng_cout(15 downto 0);
|
1455 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB + '1';
|
1456 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
1457 |
|
|
mem_WR_i <= '1';
|
1458 |
|
|
end if;
|
1459 |
|
|
|
1460 |
|
|
when st_Open_RRN_BackscatterHandler_AND_SaveRN =>
|
1461 |
|
|
if mem_RB = '1' then
|
1462 |
|
|
mem_DTI_i <= '0' & rng_cout(30 downto 16);
|
1463 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB;
|
1464 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
1465 |
|
|
mem_WR_i <= '1';
|
1466 |
|
|
-- Backscatter RN16
|
1467 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1468 |
|
|
trm_buf_i <= RN16Handler;
|
1469 |
|
|
end if;
|
1470 |
|
|
|
1471 |
|
|
|
1472 |
|
|
|
1473 |
|
|
-----------------------------------------------------------------------
|
1474 |
|
|
-- SECURED (in output process)
|
1475 |
|
|
-----------------------------------------------------------------------
|
1476 |
|
|
when st_Secured =>
|
1477 |
|
|
if CommDone = cmd_Query then
|
1478 |
|
|
if Data_r(6 downto 5) = CurrSession then --TODO: Verify flags refresh in one clockcycle.
|
1479 |
|
|
-- Toggle inventoried flag
|
1480 |
|
|
case CurrSession is
|
1481 |
|
|
when "00" =>
|
1482 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1483 |
|
|
SInvCE(0) <= '1';
|
1484 |
|
|
when "01" =>
|
1485 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1486 |
|
|
SInvCE(1) <= '1';
|
1487 |
|
|
when "10" =>
|
1488 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1489 |
|
|
SInvCE(2) <= '1';
|
1490 |
|
|
when "11" =>
|
1491 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1492 |
|
|
SInvCE(3) <= '1';
|
1493 |
|
|
when others => null;
|
1494 |
|
|
end case;
|
1495 |
|
|
end if;
|
1496 |
|
|
elsif CommDone = cmd_QueryRep then
|
1497 |
|
|
if CurrSession = Data_r(1 downto 0) then
|
1498 |
|
|
-- Toggle inventoried flag
|
1499 |
|
|
case CurrSession is
|
1500 |
|
|
when "00" =>
|
1501 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1502 |
|
|
SInvCE(0) <= '1';
|
1503 |
|
|
when "01" =>
|
1504 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1505 |
|
|
SInvCE(1) <= '1';
|
1506 |
|
|
when "10" =>
|
1507 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1508 |
|
|
SInvCE(2) <= '1';
|
1509 |
|
|
when "11" =>
|
1510 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1511 |
|
|
SInvCE(3) <= '1';
|
1512 |
|
|
when others => null;
|
1513 |
|
|
end case;
|
1514 |
|
|
end if;
|
1515 |
|
|
elsif CommDone = cmd_QueryAdjust then
|
1516 |
|
|
if CurrSession = Data_r(4 downto 3) then
|
1517 |
|
|
-- Toggle inventoried flag
|
1518 |
|
|
case CurrSession is
|
1519 |
|
|
when "00" =>
|
1520 |
|
|
SInvD(0) <= not(SInvQ(0));
|
1521 |
|
|
SInvCE(0) <= '1';
|
1522 |
|
|
when "01" =>
|
1523 |
|
|
SInvD(1) <= not(SInvQ(1));
|
1524 |
|
|
SInvCE(1) <= '1';
|
1525 |
|
|
when "10" =>
|
1526 |
|
|
SInvD(2) <= not(SInvQ(2));
|
1527 |
|
|
SInvCE(2) <= '1';
|
1528 |
|
|
when "11" =>
|
1529 |
|
|
SInvD(3) <= not(SInvQ(3));
|
1530 |
|
|
SInvCE(3) <= '1';
|
1531 |
|
|
when others => null;
|
1532 |
|
|
end case;
|
1533 |
|
|
end if;
|
1534 |
|
|
elsif CommDone = cmd_Ack then
|
1535 |
|
|
if RN16_r = RN16Handler then
|
1536 |
|
|
ADRint_i <= MEMORY_PC_ADDRESS_16b;
|
1537 |
|
|
end if;
|
1538 |
|
|
elsif CommDone = cmd_ReqRN then
|
1539 |
|
|
if RN16_r = RN16Handler then
|
1540 |
|
|
rng_ce_i <= '1'; -- Prepare new RN
|
1541 |
|
|
end if;
|
1542 |
|
|
elsif CommDone = cmd_Select then
|
1543 |
|
|
if Select_Address_Pointer_Length_OK = '1' then
|
1544 |
|
|
ADRint_i(11 downto 0) <= Pointer_r(15 downto 4);
|
1545 |
|
|
-- CompLSBit_i <= Pointer_r(3 downto 0);
|
1546 |
|
|
GCounter_i <= Length_r;
|
1547 |
|
|
end if;
|
1548 |
|
|
elsif CommDone = cmd_Read then
|
1549 |
|
|
if RN16_r = RN16Handler then
|
1550 |
|
|
GPR_i <= (others => '0');
|
1551 |
|
|
end if;
|
1552 |
|
|
-- Write command does not cause any FSM output at this point (see next_state_process)
|
1553 |
|
|
end if;
|
1554 |
|
|
|
1555 |
|
|
when st_Secured_ACK_GetPC =>
|
1556 |
|
|
ADRint_i <= ADRint;
|
1557 |
|
|
if mem_RB = '1' then
|
1558 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1559 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1560 |
|
|
ADRint_i <= ADRint + '1';
|
1561 |
|
|
mem_RD_i <= '1';
|
1562 |
|
|
GPR_i <= (others => '0');
|
1563 |
|
|
end if;
|
1564 |
|
|
|
1565 |
|
|
when st_Secured_ACK_SendPC_AND_DecodeEPCLength =>
|
1566 |
|
|
ADRint_i <= ADRint;
|
1567 |
|
|
if mem_RB = '1' then
|
1568 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1569 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1570 |
|
|
ADRint_i <= ADRint + '1';
|
1571 |
|
|
mem_RD_i <= '1';
|
1572 |
|
|
-- GPR_i(4 downto 0) <= mem_DTO(0 to 4); --Length of the PC+EPC (in words)
|
1573 |
|
|
GPR_i(4) <= mem_DTO(0);
|
1574 |
|
|
GPR_i(3) <= mem_DTO(1);
|
1575 |
|
|
GPR_i(2) <= mem_DTO(2);
|
1576 |
|
|
GPR_i(1) <= mem_DTO(3);
|
1577 |
|
|
GPR_i(0) <= mem_DTO(4);
|
1578 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1579 |
|
|
trm_buf_i <= mem_DTO;
|
1580 |
|
|
end if;
|
1581 |
|
|
|
1582 |
|
|
when st_Secured_ACK_GetAndSendEPC =>
|
1583 |
|
|
ADRint_i <= ADRint;
|
1584 |
|
|
if mem_RB = '1' then
|
1585 |
|
|
if unsigned(GPR) /= 0 then
|
1586 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1587 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1588 |
|
|
ADRint_i <= ADRint + '1';
|
1589 |
|
|
mem_RD_i <= '1';
|
1590 |
|
|
GPR_i <= GPR - '1';
|
1591 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1592 |
|
|
trm_buf_i <= mem_DTO;
|
1593 |
|
|
else
|
1594 |
|
|
mem_ADR_i <= MEMORY_CRC16_ADDRESS;
|
1595 |
|
|
mem_BANK_i <= EPC_MEMORY_BANK;
|
1596 |
|
|
mem_RD_i <= '1';
|
1597 |
|
|
end if;
|
1598 |
|
|
end if;
|
1599 |
|
|
|
1600 |
|
|
when st_Secured_ACK_GetAndSendCRC16 =>
|
1601 |
|
|
if mem_RB = '1' then
|
1602 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1603 |
|
|
trm_buf_i <= mem_DTO;
|
1604 |
|
|
end if;
|
1605 |
|
|
|
1606 |
|
|
when st_Secured_RRN_LoadHandler_AND_SaveRN =>
|
1607 |
|
|
if mem_RB = '1' then
|
1608 |
|
|
RN16Handler_i <= rng_cout(15 downto 0);
|
1609 |
|
|
mem_DTI_i <= rng_cout(15 downto 0);
|
1610 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB + '1';
|
1611 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
1612 |
|
|
mem_WR_i <= '1';
|
1613 |
|
|
end if;
|
1614 |
|
|
|
1615 |
|
|
when st_Secured_RRN_BackscatterHandler_AND_SaveRN =>
|
1616 |
|
|
if mem_RB = '1' then
|
1617 |
|
|
mem_DTI_i <= '0' & rng_cout(30 downto 16);
|
1618 |
|
|
mem_ADR_i <= MEMORY_KILL_RNG_ADDRESS_MSB;
|
1619 |
|
|
mem_BANK_i <= RESERVED_MEMORY_BANK;
|
1620 |
|
|
mem_WR_i <= '1';
|
1621 |
|
|
-- Backscatter RN16
|
1622 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1623 |
|
|
trm_buf_i <= RN16Handler;
|
1624 |
|
|
end if;
|
1625 |
|
|
|
1626 |
|
|
when st_Secured_WR_CheckMemoryBounds =>
|
1627 |
|
|
if Write_Address_Pointer_Length_OK = '1' then
|
1628 |
|
|
ADRint_i <= Pointer_r;
|
1629 |
|
|
GPR_i(15 downto 0) <= Data_r(15 downto 0) xor RN16Handler;
|
1630 |
|
|
else
|
1631 |
|
|
trm_cmd_i <= trmcmd_SendError;
|
1632 |
|
|
trm_buf_i <= NON_SPECIFIC_ERROR; -- X"0F"
|
1633 |
|
|
end if;
|
1634 |
|
|
|
1635 |
|
|
when st_Secured_WR_WriteWord =>
|
1636 |
|
|
ADRint_i <= ADRint;
|
1637 |
|
|
if mem_RB = '1' then
|
1638 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1639 |
|
|
mem_DTI_i <= GPR(15 downto 0);
|
1640 |
|
|
mem_BANK_i <= Data_r(17 downto 16);
|
1641 |
|
|
mem_WR_i <= '1';
|
1642 |
|
|
end if;
|
1643 |
|
|
|
1644 |
|
|
when st_Secured_WR_WriteIsDone =>
|
1645 |
|
|
if mem_RB = '1' then
|
1646 |
|
|
-- Backscatter Handler
|
1647 |
|
|
trm_cmd_i <= trmcmd_Send;
|
1648 |
|
|
trm_buf_i <= RN16Handler;
|
1649 |
|
|
end if;
|
1650 |
|
|
|
1651 |
|
|
when st_Secured_RD_CheckMemoryBounds =>
|
1652 |
|
|
if Read_Address_Pointer_Length_OK = '1' then
|
1653 |
|
|
ADRint_i <= Pointer_r;
|
1654 |
|
|
GPR_i(7 downto 0) <= Length_r;
|
1655 |
|
|
else
|
1656 |
|
|
trm_cmd_i <= trmcmd_SendError;
|
1657 |
|
|
trm_buf_i <= NON_SPECIFIC_ERROR; -- X"0F"
|
1658 |
|
|
end if;
|
1659 |
|
|
|
1660 |
|
|
when st_Secured_RD_ReadMemory =>
|
1661 |
|
|
ADRint_i <= ADRint;
|
1662 |
|
|
if mem_RB = '1' then
|
1663 |
|
|
if unsigned(GPR) /= 0 then
|
1664 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1665 |
|
|
mem_BANK_i <= Data_r(1 downto 0);
|
1666 |
|
|
mem_RD_i <= '1';
|
1667 |
|
|
ADRint_i <= ADRint + '1';
|
1668 |
|
|
GPR_i <= GPR - '1';
|
1669 |
|
|
else -- Backscatter the whole memory (TODO:check when MEMBANK="01" (EPC))
|
1670 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1671 |
|
|
mem_BANK_i <= Data_r(1 downto 0);
|
1672 |
|
|
mem_RD_i <= '1';
|
1673 |
|
|
ADRint_i <= ADRint + '1';
|
1674 |
|
|
-- GPR_i(31 downto 2*AddrUSR) <= (others => '0');
|
1675 |
|
|
case Data_r(1 downto 0) is
|
1676 |
|
|
when "00" => --Reserved Memory
|
1677 |
|
|
-- GPR_i((2*AddrUSR)-1 downto 0) <= conv_std_logic_vector(WordsRSV-1, 2*AddrUSR);
|
1678 |
|
|
GPR_i <= EXT(conv_std_logic_vector(WordsRSV-1, 2 * AddrUSR), 32);
|
1679 |
|
|
when "01" => -- EPC Memory
|
1680 |
|
|
-- GPR_i((2*AddrUSR)-1 downto 0) <= conv_std_logic_vector(WordsEPC-1, 2*AddrUSR);
|
1681 |
|
|
GPR_i <= EXT(conv_std_logic_vector(WordsEPC-1, 2 * AddrUSR), 32);
|
1682 |
|
|
when "10" => --TID Memory
|
1683 |
|
|
-- GPR_i((2*AddrUSR)-1 downto 0) <= conv_std_logic_vector(WordsTID-1, 2*AddrUSR);
|
1684 |
|
|
GPR_i <= EXT(conv_std_logic_vector(WordsTID-1, 2 * AddrUSR), 32);
|
1685 |
|
|
when "11" => -- User Memory
|
1686 |
|
|
-- GPR_i((2*AddrUSR)-1 downto 0) <= conv_std_logic_vector(WordsUSR-1, 2*AddrUSR);
|
1687 |
|
|
GPR_i <= EXT(conv_std_logic_vector(WordsUSR-1, 2 * AddrUSR), 32);
|
1688 |
|
|
when others => null;
|
1689 |
|
|
end case;
|
1690 |
|
|
end if;
|
1691 |
|
|
end if;
|
1692 |
|
|
|
1693 |
|
|
when st_Secured_RD_Read_AND_Send =>
|
1694 |
|
|
ADRint_i <= ADRint;
|
1695 |
|
|
if mem_RB = '1' then
|
1696 |
|
|
if unsigned(GPR) /= 0 then
|
1697 |
|
|
mem_ADR_i <= conv_std_logic_vector(conv_integer(ADRint), 2*AddrUSR);
|
1698 |
|
|
mem_BANK_i <= Data_r(1 downto 0);
|
1699 |
|
|
mem_RD_i <= '1';
|
1700 |
|
|
ADRint_i <= ADRint + '1';
|
1701 |
|
|
GPR_i <= GPR - '1';
|
1702 |
|
|
--backscatter data
|
1703 |
|
|
trm_cmd_i <= trmcmd_SendRData;
|
1704 |
|
|
trm_buf_i <= mem_DTO;
|
1705 |
|
|
end if;
|
1706 |
|
|
end if;
|
1707 |
|
|
|
1708 |
|
|
when st_Secured_RD_SendLast =>
|
1709 |
|
|
if mem_RB = '1' then
|
1710 |
|
|
--backscatter data
|
1711 |
|
|
trm_cmd_i <= trmcmd_SendRData;
|
1712 |
|
|
trm_buf_i <= mem_DTO;
|
1713 |
|
|
end if;
|
1714 |
|
|
|
1715 |
|
|
when st_Secured_RD_SendHandle =>
|
1716 |
|
|
trm_cmd_i <= trmcmd_SendRHandler;
|
1717 |
|
|
trm_buf_i <= RN16Handler;
|
1718 |
|
|
|
1719 |
|
|
|
1720 |
|
|
|
1721 |
|
|
-----------------------------------------------------------------------
|
1722 |
|
|
-- KILLED (in output process)
|
1723 |
|
|
-----------------------------------------------------------------------
|
1724 |
|
|
when st_Killed => null;
|
1725 |
|
|
|
1726 |
|
|
|
1727 |
|
|
when others => null;
|
1728 |
|
|
end case;
|
1729 |
|
|
|
1730 |
|
|
|
1731 |
|
|
end process OUTPUT_DEC;
|
1732 |
|
|
|
1733 |
|
|
|
1734 |
|
|
|
1735 |
|
|
|
1736 |
|
|
-----------------------------------------------------------------------------
|
1737 |
|
|
-- Inventory and Select Flag Comparison
|
1738 |
|
|
-----------------------------------------------------------------------------
|
1739 |
|
|
Query_InventoryFlag_Match <= '1' when Data_r(8 downto 7) = "00" else
|
1740 |
|
|
'1' when Data_r(8 downto 7) = "01" else
|
1741 |
|
|
'1' when (Data_r(8 downto 7) = "10" and SelQ = '0') else
|
1742 |
|
|
'1' when (Data_r(8 downto 7) = "11" and SelQ = '1') else
|
1743 |
|
|
'0';
|
1744 |
|
|
Query_SelectFlag_Match <= '1' when (Data_r(6 downto 5) = "00" and Data_r(4) = SInvQ(0)) else
|
1745 |
|
|
'1' when (Data_r(6 downto 5) = "01" and Data_r(4) = SInvQ(1)) else
|
1746 |
|
|
'1' when (Data_r(6 downto 5) = "10" and Data_r(4) = SInvQ(2)) else
|
1747 |
|
|
'1' when (Data_r(6 downto 5) = "11" and Data_r(4) = SInvQ(3)) else
|
1748 |
|
|
'0';
|
1749 |
|
|
|
1750 |
|
|
-----------------------------------------------------------------------------
|
1751 |
|
|
-- Slot Zero comparison
|
1752 |
|
|
-----------------------------------------------------------------------------
|
1753 |
|
|
SlotIsZero <= '1' when conv_integer(Slot) = 0 else
|
1754 |
|
|
'0';
|
1755 |
|
|
|
1756 |
|
|
-----------------------------------------------------------------------------
|
1757 |
|
|
-- Adress Pointer & Length Control (Select Command)
|
1758 |
|
|
-----------------------------------------------------------------------------
|
1759 |
|
|
|
1760 |
|
|
Select_Address_Pointer_Length_OK <= '1' when Select_Address_Bounds_OK = '1' and conv_integer(Length_r) /= 0 else
|
1761 |
|
|
'0';
|
1762 |
|
|
|
1763 |
|
|
Select_Address_Bounds_OK <= '1' when (Data_r(2 downto 1) = "00") and ((conv_integer(Pointer_r(15 downto 4))+ conv_integer(Length_r)) < WordsRSV) else
|
1764 |
|
|
'1' when (Data_r(2 downto 1) = "01") and ((conv_integer(Pointer_r(15 downto 4))+ conv_integer(Length_r)) < WordsEPC) else
|
1765 |
|
|
'1' when (Data_r(2 downto 1) = "10") and ((conv_integer(Pointer_r(15 downto 4))+ conv_integer(Length_r)) < WordsTID) else
|
1766 |
|
|
'1' when (Data_r(2 downto 1) = "11") and ((conv_integer(Pointer_r(15 downto 4))+ conv_integer(Length_r)) < WordsUSR) else
|
1767 |
|
|
'0';
|
1768 |
|
|
|
1769 |
|
|
-----------------------------------------------------------------------------
|
1770 |
|
|
-- Adress Pointer & Length Control (Read Command)
|
1771 |
|
|
-----------------------------------------------------------------------------
|
1772 |
|
|
|
1773 |
|
|
Read_Address_Pointer_Length_OK <= '1' when Read_Address_Bounds_OK = '1' and conv_integer(Length_r) /= 0 else
|
1774 |
|
|
'0';
|
1775 |
|
|
|
1776 |
|
|
Read_Address_Bounds_OK <= '1' when (Data_r(1 downto 0) = "00") and ((conv_integer(Pointer_r)+ conv_integer(Length_r)) < WordsRSV) else
|
1777 |
|
|
'1' when (Data_r(1 downto 0) = "01") and ((conv_integer(Pointer_r)+ conv_integer(Length_r)) < WordsEPC) else
|
1778 |
|
|
'1' when (Data_r(1 downto 0) = "10") and ((conv_integer(Pointer_r)+ conv_integer(Length_r)) < WordsTID) else
|
1779 |
|
|
'1' when (Data_r(1 downto 0) = "11") and ((conv_integer(Pointer_r)+ conv_integer(Length_r)) < WordsUSR) else
|
1780 |
|
|
'0';
|
1781 |
|
|
|
1782 |
|
|
-----------------------------------------------------------------------------
|
1783 |
|
|
-- Adress Pointer & Length Control (Write Command)
|
1784 |
|
|
-----------------------------------------------------------------------------
|
1785 |
|
|
|
1786 |
|
|
Write_Address_Pointer_Length_OK <= '1' when Write_Address_Bounds_OK = '1' else
|
1787 |
|
|
'0';
|
1788 |
|
|
|
1789 |
|
|
Write_Address_Bounds_OK <= '1' when (Data_r(17 downto 16) = "00") and (conv_integer(Pointer_r) < WordsRSV) else
|
1790 |
|
|
'1' when (Data_r(17 downto 16) = "01") and (conv_integer(Pointer_r) < WordsEPC) else
|
1791 |
|
|
'1' when (Data_r(17 downto 16) = "10") and (conv_integer(Pointer_r) < WordsTID) else
|
1792 |
|
|
'1' when (Data_r(17 downto 16) = "11") and (conv_integer(Pointer_r) < WordsUSR) else
|
1793 |
|
|
'0';
|
1794 |
|
|
|
1795 |
|
|
|
1796 |
|
|
-----------------------------------------------------------------------------
|
1797 |
|
|
-- MASK Comparison (Select Command)
|
1798 |
|
|
-----------------------------------------------------------------------------
|
1799 |
|
|
GPR_AFTER_COMPARISON_MUX <= X"000" & "000" & GPR(0) when unsigned(GCounter(3 downto 0)) = 0 else
|
1800 |
|
|
EXT(GPR(1 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 1 else
|
1801 |
|
|
EXT(GPR(2 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 2 else
|
1802 |
|
|
EXT(GPR(3 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 3 else
|
1803 |
|
|
EXT(GPR(4 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 4 else
|
1804 |
|
|
EXT(GPR(5 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 5 else
|
1805 |
|
|
EXT(GPR(6 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 6 else
|
1806 |
|
|
EXT(GPR(7 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 7 else
|
1807 |
|
|
EXT(GPR(8 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 8 else
|
1808 |
|
|
EXT(GPR(9 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 9 else
|
1809 |
|
|
EXT(GPR(10 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 10 else
|
1810 |
|
|
EXT(GPR(11 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 11 else
|
1811 |
|
|
EXT(GPR(12 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 12 else
|
1812 |
|
|
EXT(GPR(13 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 13 else
|
1813 |
|
|
EXT(GPR(14 downto 0), 16) when unsigned(GCounter(3 downto 0)) = 14 else
|
1814 |
|
|
GPR(15 downto 0);
|
1815 |
|
|
|
1816 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX <= Mask_r(15 downto 0) when unsigned(GCounter2) = 0 else
|
1817 |
|
|
Mask_r(16 downto 1) when unsigned(GCounter2) = 1 else
|
1818 |
|
|
Mask_r(17 downto 2) when unsigned(GCounter2) = 2 else
|
1819 |
|
|
Mask_r(18 downto 3) when unsigned(GCounter2) = 3 else
|
1820 |
|
|
Mask_r(19 downto 4) when unsigned(GCounter2) = 4 else
|
1821 |
|
|
Mask_r(20 downto 5) when unsigned(GCounter2) = 5 else
|
1822 |
|
|
Mask_r(21 downto 6) when unsigned(GCounter2) = 6 else
|
1823 |
|
|
Mask_r(22 downto 7) when unsigned(GCounter2) = 7 else
|
1824 |
|
|
Mask_r(23 downto 8) when unsigned(GCounter2) = 8 else
|
1825 |
|
|
Mask_r(24 downto 9) when unsigned(GCounter2) = 9 else
|
1826 |
|
|
Mask_r(25 downto 10) when unsigned(GCounter2) = 10 else
|
1827 |
|
|
Mask_r(26 downto 11) when unsigned(GCounter2) = 11 else
|
1828 |
|
|
Mask_r(27 downto 12) when unsigned(GCounter2) = 12 else
|
1829 |
|
|
Mask_r(28 downto 13) when unsigned(GCounter2) = 13 else
|
1830 |
|
|
Mask_r(29 downto 14) when unsigned(GCounter2) = 14 else
|
1831 |
|
|
Mask_r(30 downto 15) when unsigned(GCounter2) = 15 else
|
1832 |
|
|
Mask_r(31 downto 16) when unsigned(GCounter2) = 16 else
|
1833 |
|
|
Mask_r(32 downto 17) when unsigned(GCounter2) = 17 else
|
1834 |
|
|
Mask_r(33 downto 18) when unsigned(GCounter2) = 18 else
|
1835 |
|
|
Mask_r(34 downto 19) when unsigned(GCounter2) = 19 else
|
1836 |
|
|
Mask_r(35 downto 20) when unsigned(GCounter2) = 20 else
|
1837 |
|
|
Mask_r(36 downto 21);
|
1838 |
|
|
|
1839 |
|
|
MASK_AFTER_COMPARISON_BIT_MUX <= MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000000000001" when unsigned(GCounter(3 downto 0)) = 0 else
|
1840 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000000000011" when unsigned(GCounter(3 downto 0)) = 1 else
|
1841 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000000000111" when unsigned(GCounter(3 downto 0)) = 2 else
|
1842 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000000001111" when unsigned(GCounter(3 downto 0)) = 3 else
|
1843 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000000011111" when unsigned(GCounter(3 downto 0)) = 4 else
|
1844 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000000111111" when unsigned(GCounter(3 downto 0)) = 5 else
|
1845 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000001111111" when unsigned(GCounter(3 downto 0)) = 6 else
|
1846 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000011111111" when unsigned(GCounter(3 downto 0)) = 7 else
|
1847 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000000111111111" when unsigned(GCounter(3 downto 0)) = 8 else
|
1848 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000001111111111" when unsigned(GCounter(3 downto 0)) = 9 else
|
1849 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000011111111111" when unsigned(GCounter(3 downto 0)) = 10 else
|
1850 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0000111111111111" when unsigned(GCounter(3 downto 0)) = 11 else
|
1851 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0001111111111111" when unsigned(GCounter(3 downto 0)) = 12 else
|
1852 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0011111111111111" when unsigned(GCounter(3 downto 0)) = 13 else
|
1853 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX and "0111111111111111" when unsigned(GCounter(3 downto 0)) = 14 else
|
1854 |
|
|
MASK_AFTER_FIRSTCOMPARISON_MUX;
|
1855 |
|
|
|
1856 |
|
|
-----------------------------------------------------------------------------
|
1857 |
|
|
-- SLOT VALUE (Query Command)
|
1858 |
|
|
-----------------------------------------------------------------------------
|
1859 |
|
|
SLOT_VALUE <= X"0000" when unsigned(CurrQ) = 0 else
|
1860 |
|
|
X"000" & "000" & rng_cout(0) when unsigned(CurrQ) = 1 else
|
1861 |
|
|
EXT(rng_cout(1 downto 0), 16) when unsigned(CurrQ) = 2 else
|
1862 |
|
|
EXT(rng_cout(2 downto 0), 16) when unsigned(CurrQ) = 3 else
|
1863 |
|
|
EXT(rng_cout(3 downto 0), 16) when unsigned(CurrQ) = 4 else
|
1864 |
|
|
EXT(rng_cout(4 downto 0), 16) when unsigned(CurrQ) = 5 else
|
1865 |
|
|
EXT(rng_cout(5 downto 0), 16) when unsigned(CurrQ) = 6 else
|
1866 |
|
|
EXT(rng_cout(6 downto 0), 16) when unsigned(CurrQ) = 7 else
|
1867 |
|
|
EXT(rng_cout(7 downto 0), 16) when unsigned(CurrQ) = 8 else
|
1868 |
|
|
EXT(rng_cout(8 downto 0), 16) when unsigned(CurrQ) = 9 else
|
1869 |
|
|
EXT(rng_cout(9 downto 0), 16) when unsigned(CurrQ) = 10 else
|
1870 |
|
|
EXT(rng_cout(10 downto 0), 16) when unsigned(CurrQ) = 11 else
|
1871 |
|
|
EXT(rng_cout(11 downto 0), 16) when unsigned(CurrQ) = 12 else
|
1872 |
|
|
EXT(rng_cout(12 downto 0), 16) when unsigned(CurrQ) = 13 else
|
1873 |
|
|
EXT(rng_cout(13 downto 0), 16) when unsigned(CurrQ) = 14 else
|
1874 |
|
|
EXT(rng_cout(14 downto 0), 16);
|
1875 |
|
|
|
1876 |
|
|
|
1877 |
|
|
|
1878 |
|
|
end TagFSM1;
|