------------------------------------------------------------------------------- --$Date: 2007/08/01 23:10:49 $ --$RCSfile: frame_check_vhd.ejava,v $ --$Revision: 1.1.2.1 $ ------------------------------------------------------------------------------- -- ____ ____ -- / /\/ / -- /___/ \ / Vendor: Xilinx -- \ \ \/ Version : 1.7 -- \ \ Application : GTP Wizard -- / / Filename : frame_check.vhd -- /___/ /\ Timestamp : -- \ \ / \ -- \___\/\___\ -- -- -- Module FRAME_CHECK -- Generated by Xilinx GTP Wizard library ieee; use ieee.std_logic_1164.all; use ieee.numeric_std.all; library UNISIM; use UNISIM.VCOMPONENTS.ALL; --***********************************Entity Declaration************************ entity FRAME_CHECK is generic ( RX_DATA_WIDTH : integer := 16; USE_COMMA : integer := 1; WORDS_IN_BRAM : integer := 256; CONFIG_INDEPENDENT_LANES : integer := 0; START_OF_PACKET_CHAR : std_logic_vector := x"55fb"; MEM_00 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_01 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_02 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_03 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_04 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_05 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_06 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_07 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_08 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_09 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_0A : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_0B : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_0C : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_0D : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_0E : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_0F : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_10 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_11 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_12 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_13 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_14 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_15 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_16 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_17 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_18 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_19 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_1A : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_1B : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_1C : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_1D : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_1E : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_1F : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_20 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_21 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_22 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_23 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_24 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_25 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_26 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_27 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_28 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_29 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_2A : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_2B : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_2C : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_2D : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_2E : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_2F : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_30 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_31 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_32 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_33 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_34 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_35 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_36 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_37 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_38 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_39 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_3A : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_3B : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_3C : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_3D : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_3E : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEM_3F : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_00 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_01 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_02 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_03 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_04 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_05 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_06 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000"; MEMP_07 : bit_vector := X"0000000000000000000000000000000000000000000000000000000000000000" ); port ( -- User Interface RX_DATA : in std_logic_vector((RX_DATA_WIDTH-1) downto 0); RX_ENMCOMMA_ALIGN : out std_logic; RX_ENPCOMMA_ALIGN : out std_logic; RX_ENCHAN_SYNC : out std_logic; -- Control Interface INC_IN : in std_logic; INC_OUT : out std_logic; PATTERN_MATCH_N : out std_logic; RESET_ON_ERROR : in std_logic; -- Error Monitoring ERROR_COUNT : out std_logic_vector(7 downto 0); -- System Interface USER_CLK : in std_logic; SYSTEM_RESET : in std_logic ); end FRAME_CHECK; architecture RTL of FRAME_CHECK is --***********************************Parameter Declarations******************** constant DLY : time := 1 ns; --***************************Internal Register Declarations******************** signal begin_r : std_logic; signal data_error_detected_r : std_logic; signal error_count_r : unsigned(8 downto 0); signal error_detected_r : std_logic; signal read_counter_i : unsigned(8 downto 0); signal rx_data_r : std_logic_vector((RX_DATA_WIDTH-1) downto 0); signal rx_data_r2 : std_logic_vector((RX_DATA_WIDTH-1) downto 0); signal start_of_packet_detected_r : std_logic; signal track_data_r : std_logic; --*********************************Wire Declarations*************************** signal bram_data_r : std_logic_vector(31 downto 0); signal error_detected_c : std_logic; signal next_begin_c : std_logic; signal next_data_error_detected_c : std_logic; signal next_track_data_c : std_logic; signal start_of_packet_detected_c : std_logic; signal rx_data_has_start_char_c : std_logic; signal rx_data_matches_bram_c : std_logic; signal start_of_packet_char_c : std_logic_vector((RX_DATA_WIDTH-1) downto 0); signal tied_to_ground_i : std_logic; signal tied_to_ground_vec_i : std_logic_vector(31 downto 0); signal tied_to_vcc_i : std_logic; --*********************************Main Body of Code*************************** begin --_______________________ Static signal Assigments _______________________ tied_to_ground_i <= '0'; tied_to_ground_vec_i <= (others=>'0'); tied_to_vcc_i <= '1'; --______________________ Assign the start of packet character _____________ start_of_packet_char_c <= START_OF_PACKET_CHAR; --________________________________ State machine __________________________ -- State registers process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then if(RESET_ON_ERROR ='1' or SYSTEM_RESET = '1') then begin_r <= '1' after DLY; track_data_r <= '0' after DLY; data_error_detected_r <= '0' after DLY; else begin_r <= next_begin_c after DLY; track_data_r <= next_track_data_c after DLY; data_error_detected_r <= next_data_error_detected_c after DLY; end if; end if; end process; -- Next state logic next_begin_c <= (begin_r and not start_of_packet_detected_r) or data_error_detected_r ; next_track_data_c <= (begin_r and start_of_packet_detected_r) or (track_data_r and not error_detected_r); next_data_error_detected_c <= (track_data_r and error_detected_r); rx_data_has_start_char_c <= '1' when (RX_DATA = start_of_packet_char_c) else '0'; start_of_packet_detected_c <= INC_IN when (CONFIG_INDEPENDENT_LANES=0) else rx_data_has_start_char_c; process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then start_of_packet_detected_r <= start_of_packet_detected_c after DLY; end if; end process; --______________________________ Capture incoming data ____________________ process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then rx_data_r <= RX_DATA after DLY; rx_data_r2 <= rx_data_r after DLY; end if; end process; --_____________________________ Assign output ports _______________________ INC_OUT <= start_of_packet_detected_c; PATTERN_MATCH_N <= data_error_detected_r; -- Drive the enamcommaalign port of the mgt for alignment process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then if(SYSTEM_RESET = '1') then RX_ENMCOMMA_ALIGN <= '0' after DLY; else RX_ENMCOMMA_ALIGN <= '1' after DLY; --'1' after DLY; end if; end if; end process; -- Drive the enapcommaalign port of the mgt for alignment process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then if(SYSTEM_RESET = '1') then RX_ENPCOMMA_ALIGN <= '0' after DLY; else RX_ENPCOMMA_ALIGN <= '1' after DLY; --'1' after DLY; end if; end if; end process; -- Drive the enchansync port of the mgt for channel bonding process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then if(SYSTEM_RESET = '1') then RX_ENCHAN_SYNC <= '0' after DLY; else RX_ENCHAN_SYNC <= '1' after DLY; end if; end if; end process; --___________________________ Check incoming data for errors ______________ --An error is detected when data read for the BRAM does not match the incoming data rx_data_matches_bram_c <= '0' when (rx_data_r2 /= bram_data_r((RX_DATA_WIDTH-1) downto 0)) else '1'; error_detected_c <= track_data_r and not rx_data_matches_bram_c; enable_error_check : if USE_COMMA = 1 generate --We register the error_detected signal for use with the error counter logic process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then if(not(track_data_r = '1')) then error_detected_r <= '0' after DLY; else error_detected_r <= error_detected_c after DLY; end if; end if; end process; end generate enable_error_check; disable_error_check : if USE_COMMA = 0 generate -- Since the comma detect logic has not been enabled, the error counter has been disabled since -- it doesnt make sense to be searching for an align character in the data. To enable the error -- count again, please see the code above error_detected_r <= '0'; end generate disable_error_check; --We count the total number of errors we detect. By keeping a count we make it less likely that we will miss --errors we did not directly observe. This counter must be reset when it reaches its max value process ( USER_CLK ) begin if( USER_CLK'event and USER_CLK = '1') then if(SYSTEM_RESET='1') then error_count_r <= (others => '0') after DLY; elsif(error_detected_r = '1') then error_count_r <= error_count_r + 1 after DLY; end if; end if; end process; --Here we connect the lower 8 bits of the count (the MSbit is used only to check when the counter reaches --max value) to the module output ERROR_COUNT <= std_logic_vector(error_count_r(7 downto 0)); --____________________________ Counter to read from BRAM __________________________ process( USER_CLK ) begin if(USER_CLK'event and USER_CLK = '1') then if((RESET_ON_ERROR='1') or (SYSTEM_RESET='1') or (read_counter_i = (WORDS_IN_BRAM-1)) or (start_of_packet_detected_c='1') ) then read_counter_i <= (others => '0') after DLY; else read_counter_i <= read_counter_i + 1 after DLY; end if; end if; end process; --________________________________ BRAM Instantiation _____________________________ dual_port_block_ram_i : RAMB16_S36_S36 generic map ( INIT_00 => MEM_00, INIT_01 => MEM_01, INIT_02 => MEM_02, INIT_03 => MEM_03, INIT_04 => MEM_04, INIT_05 => MEM_05, INIT_06 => MEM_06, INIT_07 => MEM_07, INIT_08 => MEM_08, INIT_09 => MEM_09, INIT_0A => MEM_0A, INIT_0B => MEM_0B, INIT_0C => MEM_0C, INIT_0D => MEM_0D, INIT_0E => MEM_0E, INIT_0F => MEM_0F, INIT_10 => MEM_10, INIT_11 => MEM_11, INIT_12 => MEM_12, INIT_13 => MEM_13, INIT_14 => MEM_14, INIT_15 => MEM_15, INIT_16 => MEM_16, INIT_17 => MEM_17, INIT_18 => MEM_18, INIT_19 => MEM_19, INIT_1A => MEM_1A, INIT_1B => MEM_1B, INIT_1C => MEM_1C, INIT_1D => MEM_1D, INIT_1E => MEM_1E, INIT_1F => MEM_1F, INIT_20 => MEM_20, INIT_21 => MEM_21, INIT_22 => MEM_22, INIT_23 => MEM_23, INIT_24 => MEM_24, INIT_25 => MEM_25, INIT_26 => MEM_26, INIT_27 => MEM_27, INIT_28 => MEM_28, INIT_29 => MEM_29, INIT_2A => MEM_2A, INIT_2B => MEM_2B, INIT_2C => MEM_2C, INIT_2D => MEM_2D, INIT_2E => MEM_2E, INIT_2F => MEM_2F, INIT_30 => MEM_30, INIT_31 => MEM_31, INIT_32 => MEM_32, INIT_33 => MEM_33, INIT_34 => MEM_34, INIT_35 => MEM_35, INIT_36 => MEM_36, INIT_37 => MEM_37, INIT_38 => MEM_38, INIT_39 => MEM_39, INIT_3A => MEM_3A, INIT_3B => MEM_3B, INIT_3C => MEM_3C, INIT_3D => MEM_3D, INIT_3E => MEM_3E, INIT_3F => MEM_3F, INITP_00 => MEMP_00, INITP_01 => MEMP_01, INITP_02 => MEMP_02, INITP_03 => MEMP_03, INITP_04 => MEMP_04, INITP_05 => MEMP_05, INITP_06 => MEMP_06, INITP_07 => MEMP_07 ) port map ( ADDRA => std_logic_vector(read_counter_i), DIA => tied_to_ground_vec_i(31 downto 0), DIPA => tied_to_ground_vec_i(3 downto 0), DOA => bram_data_r, DOPA => open, WEA => tied_to_ground_i, ENA => tied_to_vcc_i, SSRA => tied_to_ground_i, CLKA => USER_CLK, ADDRB => tied_to_ground_vec_i(8 downto 0), DIB => tied_to_ground_vec_i(31 downto 0), DIPB => tied_to_ground_vec_i(3 downto 0), DOB => open, DOPB => open, WEB => tied_to_ground_i, ENB => tied_to_ground_i, SSRB => tied_to_ground_i, CLKB => tied_to_ground_i ); end RTL;