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craighaywo |
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-- Company:
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-- Engineer:
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--
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-- Create Date: 15:20:06 11/16/2014
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-- Design Name:
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-- Module Name: SdCardReadWrite - Behavioral
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-- Project Name:
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-- Target Devices:
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-- Tool versions:
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-- Description:
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--
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-- Dependencies:
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--
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-- Revision:
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-- Revision 0.01 - File Created
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-- Additional Comments:
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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.NUMERIC_STD.ALL;
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library UNISIM;
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use UNISIM.VComponents.all;
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entity SdCardReadWrite is
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Port ( CLK_IN : in STD_LOGIC;
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RESET_IN : in STD_LOGIC;
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FAT_BEGIN_ADDR_IN : in STD_LOGIC_VECTOR (31 downto 0);
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SECTORS_PER_FAT_IN : in STD_LOGIC_VECTOR (31 downto 0);
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CLUSTER_BEGIN_ADDR_IN : in STD_LOGIC_VECTOR (31 downto 0);
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SECTORS_PER_CLUSTER_IN : in STD_LOGIC_VECTOR (7 downto 0);
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ROOT_DIR_FIRST_CLUSTER_IN : in STD_LOGIC_VECTOR (31 downto 0);
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SD_INIT_CMPLT_IN : in STD_LOGIC;
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SD_BLOCK_RD_OUT : out STD_LOGIC;
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SD_BLOCK_ADDR_OUT : out STD_LOGIC_VECTOR (31 downto 0);
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SD_DATA_IN : in STD_LOGIC_VECTOR (7 downto 0);
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SD_BUSY_IN : in STD_LOGIC;
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SD_BYTE_RD_OUT : out STD_LOGIC;
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SD_BYTE_RD_ACK_IN : in STD_LOGIC;
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GET_NEXT_DIRENT_IN : in STD_LOGIC;
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NEXT_DIRENT_DONE_OUT : out STD_LOGIC;
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DIRENT_IS_FOLDER_OUT : out STD_LOGIC;
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RD_DIRENT_NAME_CHAR_IN : in STD_LOGIC;
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DIRENT_CHAR_OUT : out STD_LOGIC_VECTOR(7 downto 0);
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END_OF_DIRENT_NAME_OUT : out STD_LOGIC;
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NO_MORE_DIRENTS_OUT : out STD_LOGIC;
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DEBUG_IN : in STD_LOGIC_VECTOR(7 downto 0);
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DEBUG_OUT : out STD_LOGIC_VECTOR(15 downto 0);
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DEBUG_OUT2 : out STD_LOGIC_VECTOR(7 downto 0));
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end SdCardReadWrite;
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architecture Behavioral of SdCardReadWrite is
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COMPONENT TDP_RAM
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Generic (G_DATA_A_SIZE :natural :=32;
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G_ADDR_A_SIZE :natural :=9;
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G_RELATION :natural :=3;
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G_INIT_FILE :string :="");--log2(SIZE_A/SIZE_B)
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Port ( CLK_A_IN : in STD_LOGIC;
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WE_A_IN : in STD_LOGIC;
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ADDR_A_IN : in STD_LOGIC_VECTOR (G_ADDR_A_SIZE-1 downto 0);
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DATA_A_IN : in STD_LOGIC_VECTOR (G_DATA_A_SIZE-1 downto 0);
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DATA_A_OUT : out STD_LOGIC_VECTOR (G_DATA_A_SIZE-1 downto 0);
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CLK_B_IN : in STD_LOGIC;
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WE_B_IN : in STD_LOGIC;
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ADDR_B_IN : in STD_LOGIC_VECTOR (G_ADDR_A_SIZE+G_RELATION-1 downto 0);
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DATA_B_IN : in STD_LOGIC_VECTOR (G_DATA_A_SIZE/(2**G_RELATION)-1 downto 0);
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DATA_B_OUT : out STD_LOGIC_VECTOR (G_DATA_A_SIZE/(2**G_RELATION)-1 downto 0));
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END COMPONENT;
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COMPONENT lifo is
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Generic ( G_LOG2_DEPTH : natural := 6;
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G_DATA_SIZE : natural := 8 ); -- LOG2(lifo depth)
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Port ( CLK_IN : in STD_LOGIC;
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RESET_IN : in STD_LOGIC;
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CACHE_ADDR_IN : in STD_LOGIC;
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GOTO_CACHE_IN : in STD_LOGIC;
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WR_DATA_IN : in STD_LOGIC_VECTOR ((G_DATA_SIZE - 1) downto 0);
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WR_EN_IN : in STD_LOGIC;
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RD_DATA_OUT : out STD_LOGIC_VECTOR ((G_DATA_SIZE - 1) downto 0);
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RD_EN_IN : in STD_LOGIC;
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EMPTY_OUT : out STD_LOGIC;
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FULL_OUT : out STD_LOGIC);
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END COMPONENT;
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subtype slv is std_logic_vector;
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constant C_unused_entry : std_logic_vector(7 downto 0) := X"E5";
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constant C_end_of_directory : std_logic_vector(7 downto 0) := X"00";
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constant C_file_name_type : std_logic_vector(7 downto 0) := X"0F";
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constant C_folder_type : std_logic_vector(7 downto 0) := X"10";
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constant C_file_type : std_logic_vector(7 downto 0) := X"20";
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constant C_attrib_offset : unsigned(4 downto 0) := "01011";
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constant C_lsb_word_lsb_offset : unsigned(4 downto 0) := "11010";
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constant C_lsb_word_msb_offset : unsigned(4 downto 0) := "11011";
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constant C_msb_word_lsb_offset : unsigned(4 downto 0) := "10100";
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constant C_msb_word_msb_offset : unsigned(4 downto 0) := "10101";
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signal sd_init_cmplt, sd_block_rd, perform_block_rd, block_rd_cmplt : std_logic := '0';
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signal sd_busy, rd_byte, rd_byte_ack, get_next_dirent : std_logic := '0';
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signal sd_data, block_rd_data : std_logic_vector(7 downto 0) := (others => '0');
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signal fat_begin_addr, sectors_per_fat : unsigned(31 downto 0);
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signal sd_block_addr : unsigned(31 downto 0);
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signal cluster_begin_addr : unsigned(31 downto 0);
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signal find_dirent_addr, find_dirent_addr_rd, find_dirent_addr_cache : unsigned(8 downto 0) := (others => '0');
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signal find_dirent_addr_rd_slv : std_logic_vector(8 downto 0);
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signal dirent_found, dirent_is_folder : std_logic := '0';
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signal dirent_lifo_we, dirent_lifo_rst, dirent_lifo_cache_addr : std_logic := '0';
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signal dirent_lifo_goto_cache, dirent_lifo_full, dirent_lifo_empty : std_logic := '0';
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signal folder_addr, folder_addr_tmp, folder_addr_final : unsigned(31 downto 0) := X"00000000";
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signal sectors_per_cluster, spc_counter : std_logic_vector(7 downto 0) := X"00";
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signal bp_lifo_rst, bp_lifo_we, bp_lifo_rd, bp_lifo_empty : std_logic := '0';
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signal bp_lifo_block_data : std_logic_vector(31 downto 0) := (others => '0');
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signal find_addr_lifo_rst, find_addr_lifo_we, find_addr_lifo_rd, find_addr_lifo_empty : std_logic := '0';
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signal end_of_dirents : std_logic := '0';
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signal sectors_per_cluster_zero_indexed, find_dirent_block_num, find_dirent_block_num_rd : unsigned(7 downto 0) := X"00";
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signal current_cluster, current_cluster_buf, current_cluster_rd : unsigned(31 downto 0) := X"00000000";
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signal current_cluster_fat_block_addr, current_cluster_tmp, next_cluster_lba : unsigned(31 downto 0) := X"00000000";
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signal current_cluster_lifo_rst, current_cluster_lifo_we, current_cluster_lifo_rd : std_logic := '0';
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signal current_cluster_lifo_empty : std_logic := '0';
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signal current_cluster_rd_slv : std_logic_vector(31 downto 0);
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signal find_dirent_block_lifo_rst, find_dirent_block_lifo_we, find_dirent_block_lifo_rd : std_logic := '0';
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signal find_dirent_block_lifo_empty : std_logic := '0';
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signal find_dirent_block_num_rd_slv : std_logic_vector(7 downto 0);
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signal file_counter :unsigned(15 downto 0) := (others => '0');
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signal debug : std_logic := '0';
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type MAIN_ROUTINE is ( REPORT_ERROR,
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WAIT_FOR_INIT_CMPLT,
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IDLE_W_BLOCK_RD,
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IDLE_NO_BLOCK_RD,
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FIND_NEXT_DIRENT0,
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FIND_NEXT_DIRENT1,
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FIND_NEXT_DIRENT2,
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FIND_NEXT_DIRENT3,
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FIND_NEXT_DIRENT4,
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FIND_NEXT_DIRENT5,
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FIND_NEXT_DIRENT6,
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PARSE_NAME_DIRENT0,
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PARSE_NAME_DIRENT1,
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PARSE_NAME_DIRENT2,
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PARSE_NAME_DIRENT3,
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PARSE_NAME_DIRENT4,
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PARSE_NAME_DIRENT5,
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PARSE_NAME_DIRENT6,
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PARSE_NAME_DIRENT7,
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PARSE_NAME_DIRENT8,
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PARSE_NAME_DIRENT9,
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PARSE_NAME_DIRENT10,
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PARSE_NAME_DIRENT11,
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PARSE_NAME_DIRENT12,
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PARSE_NAME_DIRENT13,
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PARSE_NAME_DIRENT14,
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PARSE_NAME_DIRENT15,
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PARSE_NAME_DIRENT16,
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PARSE_NAME_DIRENT17,
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HANDLE_FILE_DIRENT0,
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HANDLE_END_OF_DIR0,
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HANDLE_END_OF_DIR1,
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HANDLE_END_OF_DIR2,
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HANDLE_END_OF_DIR3,
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HANDLE_FOLDER_DIRENT0,
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HANDLE_FOLDER_DIRENT1,
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HANDLE_FOLDER_DIRENT2,
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HANDLE_FOLDER_DIRENT3,
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HANDLE_FOLDER_DIRENT4,
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HANDLE_FOLDER_DIRENT5,
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HANDLE_FOLDER_DIRENT6,
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HANDLE_FOLDER_DIRENT7,
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HANDLE_FOLDER_DIRENT8,
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HANDLE_FOLDER_DIRENT9,
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HANDLE_INTERNAL_ADDR_INC0,
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HANDLE_INTERNAL_ADDR_INC1,
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HANDLE_INTERNAL_ADDR_INC2,
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HANDLE_INTERNAL_ADDR_INC3,
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HANDLE_INTERNAL_ADDR_INC4,
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HANDLE_INTERNAL_ADDR_INC5,
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HANDLE_INTERNAL_ADDR_INC6,
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HANDLE_INTERNAL_ADDR_INC7,
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FIND_NEXT_CLUSTER0,
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FIND_NEXT_CLUSTER1,
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FIND_NEXT_CLUSTER2,
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FIND_NEXT_CLUSTER3,
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FIND_NEXT_CLUSTER4,
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FIND_NEXT_CLUSTER5,
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FIND_NEXT_CLUSTER6,
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FIND_NEXT_CLUSTER7,
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FIND_NEXT_CLUSTER8,
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FIND_NEXT_CLUSTER9,
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HANDLE_END_OF_DIRENTS0,
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HANDLE_END_OF_DIRENTS1);
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signal rw_state, rw_next_state, rw_state_cached : MAIN_ROUTINE := WAIT_FOR_INIT_CMPLT;
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signal block_rd_we : std_logic := '0';
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signal block_wr_addr, block_rd_addr : unsigned(8 downto 0) := (others => '0');
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type BLOCK_RD_ROUTINE is ( IDLE,
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WAIT_UNTIL_NOT_BUSY,
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WAIT_UNTIL_BLOCK_READ_ACKD,
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READ_BYTE0,
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READ_BYTE1,
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READ_BYTE2,
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READ_BYTE3,
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READ_BYTE4
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);
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signal br_state, br_next_state : BLOCK_RD_ROUTINE;
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signal state_debug_sig : unsigned(5 downto 0);
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signal state_debug_sig2 : unsigned(1 downto 0);
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begin
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sd_init_cmplt <= SD_INIT_CMPLT_IN;
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SD_BLOCK_RD_OUT <= sd_block_rd;
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SD_BLOCK_ADDR_OUT <= slv(sd_block_addr);
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sd_data <= SD_DATA_IN;
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sd_busy <= SD_BUSY_IN;
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SD_BYTE_RD_OUT <= rd_byte;
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rd_byte_ack <= SD_BYTE_RD_ACK_IN;
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fat_begin_addr <= unsigned(FAT_BEGIN_ADDR_IN);
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sectors_per_fat <= unsigned(SECTORS_PER_FAT_IN);
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cluster_begin_addr <= unsigned(CLUSTER_BEGIN_ADDR_IN);
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get_next_dirent <= GET_NEXT_DIRENT_IN;
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sectors_per_cluster <= SECTORS_PER_CLUSTER_IN;
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sectors_per_cluster_zero_indexed <= unsigned(SECTORS_PER_CLUSTER_IN) - 1;
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NEXT_DIRENT_DONE_OUT <= dirent_found;
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DIRENT_IS_FOLDER_OUT <= dirent_is_folder;
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END_OF_DIRENT_NAME_OUT <= dirent_lifo_empty;
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NO_MORE_DIRENTS_OUT <= end_of_dirents;
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-- debug_state: process(CLK_IN)
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-- begin
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-- if rising_edge(CLK_IN) then
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-- case (br_state) is
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-- when IDLE =>
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-- state_debug_sig <= to_unsigned(0, 6);
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-- when WAIT_UNTIL_NOT_BUSY =>
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-- state_debug_sig <= to_unsigned(1, 6);
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-- when WAIT_UNTIL_BLOCK_READ_ACKD =>
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-- state_debug_sig <= to_unsigned(2, 6);
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-- when READ_BYTE0 =>
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-- state_debug_sig <= to_unsigned(3, 6);
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-- when READ_BYTE1 =>
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-- state_debug_sig <= to_unsigned(4, 6);
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-- when READ_BYTE2 =>
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-- state_debug_sig <= to_unsigned(5, 6);
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-- when READ_BYTE3 =>
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-- state_debug_sig <= to_unsigned(6, 6);
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-- when READ_BYTE4 =>
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-- state_debug_sig <= to_unsigned(7, 6);
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-- end case;
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-- end if;
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-- end process;
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debug_state: process(CLK_IN)
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begin
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if rising_edge(CLK_IN) then
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case( rw_state ) is
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when REPORT_ERROR =>
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state_debug_sig <= to_unsigned(0, 6);
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when WAIT_FOR_INIT_CMPLT =>
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state_debug_sig <= to_unsigned(1, 6);
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when IDLE_W_BLOCK_RD =>
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state_debug_sig <= to_unsigned(2, 6);
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when IDLE_NO_BLOCK_RD =>
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state_debug_sig <= to_unsigned(3, 6);
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when FIND_NEXT_DIRENT0 =>
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state_debug_sig <= to_unsigned(4, 6);
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when FIND_NEXT_DIRENT1 =>
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state_debug_sig <= to_unsigned(5, 6);
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when FIND_NEXT_DIRENT2 =>
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state_debug_sig <= to_unsigned(6, 6);
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when FIND_NEXT_DIRENT3 =>
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state_debug_sig <= to_unsigned(7, 6);
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when FIND_NEXT_DIRENT4 =>
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|
|
state_debug_sig <= to_unsigned(8, 6);
|
304 |
|
|
when FIND_NEXT_DIRENT5 =>
|
305 |
|
|
state_debug_sig <= to_unsigned(9, 6);
|
306 |
|
|
when FIND_NEXT_DIRENT6 =>
|
307 |
|
|
state_debug_sig <= to_unsigned(10, 6);
|
308 |
|
|
when PARSE_NAME_DIRENT0 =>
|
309 |
|
|
state_debug_sig <= to_unsigned(11, 6);
|
310 |
|
|
when PARSE_NAME_DIRENT1 =>
|
311 |
|
|
state_debug_sig <= to_unsigned(12, 6);
|
312 |
|
|
when PARSE_NAME_DIRENT2 =>
|
313 |
|
|
state_debug_sig <= to_unsigned(13, 6);
|
314 |
|
|
when PARSE_NAME_DIRENT3 =>
|
315 |
|
|
state_debug_sig <= to_unsigned(14, 6);
|
316 |
|
|
when PARSE_NAME_DIRENT4 =>
|
317 |
|
|
state_debug_sig <= to_unsigned(15, 6);
|
318 |
|
|
when PARSE_NAME_DIRENT5 =>
|
319 |
|
|
state_debug_sig <= to_unsigned(16, 6);
|
320 |
|
|
when PARSE_NAME_DIRENT6 =>
|
321 |
|
|
state_debug_sig <= to_unsigned(17, 6);
|
322 |
|
|
when PARSE_NAME_DIRENT7 =>
|
323 |
|
|
state_debug_sig <= to_unsigned(18, 6);
|
324 |
|
|
when PARSE_NAME_DIRENT8 =>
|
325 |
|
|
state_debug_sig <= to_unsigned(19, 6);
|
326 |
|
|
when PARSE_NAME_DIRENT9 =>
|
327 |
|
|
state_debug_sig <= to_unsigned(20, 6);
|
328 |
|
|
when PARSE_NAME_DIRENT10 =>
|
329 |
|
|
state_debug_sig <= to_unsigned(21, 6);
|
330 |
|
|
when PARSE_NAME_DIRENT11 =>
|
331 |
|
|
state_debug_sig <= to_unsigned(22, 6);
|
332 |
|
|
when PARSE_NAME_DIRENT12 =>
|
333 |
|
|
state_debug_sig <= to_unsigned(23, 6);
|
334 |
|
|
when PARSE_NAME_DIRENT13 =>
|
335 |
|
|
state_debug_sig <= to_unsigned(24, 6);
|
336 |
|
|
when PARSE_NAME_DIRENT14 =>
|
337 |
|
|
state_debug_sig <= to_unsigned(25, 6);
|
338 |
|
|
when PARSE_NAME_DIRENT15 =>
|
339 |
|
|
state_debug_sig <= to_unsigned(26, 6);
|
340 |
|
|
when PARSE_NAME_DIRENT16 =>
|
341 |
|
|
state_debug_sig <= to_unsigned(27, 6);
|
342 |
|
|
when PARSE_NAME_DIRENT17 =>
|
343 |
|
|
state_debug_sig <= to_unsigned(28, 6);
|
344 |
|
|
when HANDLE_FILE_DIRENT0 =>
|
345 |
|
|
state_debug_sig <= to_unsigned(29, 6);
|
346 |
|
|
when HANDLE_END_OF_DIR0 =>
|
347 |
|
|
state_debug_sig <= to_unsigned(30, 6);
|
348 |
|
|
when HANDLE_END_OF_DIR1 =>
|
349 |
|
|
state_debug_sig <= to_unsigned(31, 6);
|
350 |
|
|
when HANDLE_END_OF_DIR2 =>
|
351 |
|
|
state_debug_sig <= to_unsigned(32, 6);
|
352 |
|
|
when HANDLE_END_OF_DIR3 =>
|
353 |
|
|
state_debug_sig <= to_unsigned(33, 6);
|
354 |
|
|
when HANDLE_FOLDER_DIRENT0 =>
|
355 |
|
|
state_debug_sig <= to_unsigned(34, 6);
|
356 |
|
|
when HANDLE_FOLDER_DIRENT1 =>
|
357 |
|
|
state_debug_sig <= to_unsigned(35, 6);
|
358 |
|
|
when HANDLE_FOLDER_DIRENT2 =>
|
359 |
|
|
state_debug_sig <= to_unsigned(36, 6);
|
360 |
|
|
when HANDLE_FOLDER_DIRENT3 =>
|
361 |
|
|
state_debug_sig <= to_unsigned(37, 6);
|
362 |
|
|
when HANDLE_FOLDER_DIRENT4 =>
|
363 |
|
|
state_debug_sig <= to_unsigned(38, 6);
|
364 |
|
|
when HANDLE_FOLDER_DIRENT5 =>
|
365 |
|
|
state_debug_sig <= to_unsigned(39, 6);
|
366 |
|
|
when HANDLE_FOLDER_DIRENT6 =>
|
367 |
|
|
state_debug_sig <= to_unsigned(40, 6);
|
368 |
|
|
when HANDLE_FOLDER_DIRENT7 =>
|
369 |
|
|
state_debug_sig <= to_unsigned(41, 6);
|
370 |
|
|
when HANDLE_FOLDER_DIRENT8 =>
|
371 |
|
|
state_debug_sig <= to_unsigned(42, 6);
|
372 |
|
|
when HANDLE_FOLDER_DIRENT9 =>
|
373 |
|
|
state_debug_sig <= to_unsigned(43, 6);
|
374 |
|
|
when HANDLE_INTERNAL_ADDR_INC0 =>
|
375 |
|
|
state_debug_sig <= to_unsigned(44, 6);
|
376 |
|
|
when HANDLE_INTERNAL_ADDR_INC1 =>
|
377 |
|
|
state_debug_sig <= to_unsigned(45, 6);
|
378 |
|
|
when HANDLE_INTERNAL_ADDR_INC2 =>
|
379 |
|
|
state_debug_sig <= to_unsigned(46, 6);
|
380 |
|
|
when HANDLE_INTERNAL_ADDR_INC3 =>
|
381 |
|
|
state_debug_sig <= to_unsigned(47, 6);
|
382 |
|
|
when HANDLE_INTERNAL_ADDR_INC4 =>
|
383 |
|
|
state_debug_sig <= to_unsigned(48, 6);
|
384 |
|
|
when HANDLE_INTERNAL_ADDR_INC5 =>
|
385 |
|
|
state_debug_sig <= to_unsigned(49, 6);
|
386 |
|
|
when HANDLE_INTERNAL_ADDR_INC6 =>
|
387 |
|
|
state_debug_sig <= to_unsigned(50, 6);
|
388 |
|
|
when HANDLE_INTERNAL_ADDR_INC7 =>
|
389 |
|
|
state_debug_sig <= to_unsigned(51, 6);
|
390 |
|
|
when FIND_NEXT_CLUSTER0 =>
|
391 |
|
|
state_debug_sig <= to_unsigned(52, 6);
|
392 |
|
|
when FIND_NEXT_CLUSTER1 =>
|
393 |
|
|
state_debug_sig <= to_unsigned(53, 6);
|
394 |
|
|
when FIND_NEXT_CLUSTER2 =>
|
395 |
|
|
state_debug_sig <= to_unsigned(54, 6);
|
396 |
|
|
when FIND_NEXT_CLUSTER3 =>
|
397 |
|
|
state_debug_sig <= to_unsigned(55, 6);
|
398 |
|
|
when FIND_NEXT_CLUSTER4 =>
|
399 |
|
|
state_debug_sig <= to_unsigned(56, 6);
|
400 |
|
|
when FIND_NEXT_CLUSTER5 =>
|
401 |
|
|
state_debug_sig <= to_unsigned(57, 6);
|
402 |
|
|
when FIND_NEXT_CLUSTER6 =>
|
403 |
|
|
state_debug_sig <= to_unsigned(58, 6);
|
404 |
|
|
when FIND_NEXT_CLUSTER7 =>
|
405 |
|
|
state_debug_sig <= to_unsigned(59, 6);
|
406 |
|
|
when FIND_NEXT_CLUSTER8 =>
|
407 |
|
|
state_debug_sig <= to_unsigned(60, 6);
|
408 |
|
|
when FIND_NEXT_CLUSTER9 =>
|
409 |
|
|
state_debug_sig <= to_unsigned(61, 6);
|
410 |
|
|
when HANDLE_END_OF_DIRENTS0 =>
|
411 |
|
|
state_debug_sig <= to_unsigned(62, 6);
|
412 |
|
|
when HANDLE_END_OF_DIRENTS1 =>
|
413 |
|
|
state_debug_sig <= to_unsigned(63, 6);
|
414 |
|
|
end case;
|
415 |
|
|
end if;
|
416 |
|
|
end process;
|
417 |
|
|
|
418 |
|
|
debug_state2: process(CLK_IN)
|
419 |
|
|
begin
|
420 |
|
|
if rising_edge(CLK_IN) then
|
421 |
|
|
case( rw_state_cached ) is
|
422 |
|
|
|
423 |
|
|
when FIND_NEXT_DIRENT2 =>
|
424 |
|
|
state_debug_sig2 <= to_unsigned(0, 2);
|
425 |
|
|
when PARSE_NAME_DIRENT15 =>
|
426 |
|
|
state_debug_sig2 <= to_unsigned(1, 2);
|
427 |
|
|
when IDLE_NO_BLOCK_RD =>
|
428 |
|
|
state_debug_sig2 <= to_unsigned(2, 2);
|
429 |
|
|
when others =>
|
430 |
|
|
state_debug_sig2 <= to_unsigned(3, 2);
|
431 |
|
|
end case;
|
432 |
|
|
end if;
|
433 |
|
|
end process;
|
434 |
|
|
|
435 |
|
|
-------- FSM OUTPUT --------
|
436 |
|
|
|
437 |
|
|
BLOCK_RD: process(CLK_IN)
|
438 |
|
|
begin
|
439 |
|
|
if rising_edge(CLK_IN) then
|
440 |
|
|
if rw_state = WAIT_FOR_INIT_CMPLT then
|
441 |
|
|
sd_block_addr <= cluster_begin_addr;
|
442 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT9 then
|
443 |
|
|
sd_block_addr <= folder_addr_final;
|
444 |
|
|
elsif rw_state = HANDLE_END_OF_DIR0 then
|
445 |
|
|
sd_block_addr <= unsigned(bp_lifo_block_data);
|
446 |
|
|
elsif rw_state = HANDLE_END_OF_DIRENTS0 then
|
447 |
|
|
sd_block_addr <= cluster_begin_addr;
|
448 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC1 then
|
449 |
|
|
sd_block_addr <= sd_block_addr + 1;
|
450 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER1 then
|
451 |
|
|
sd_block_addr <= current_cluster_fat_block_addr;
|
452 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC6 then
|
453 |
|
|
sd_block_addr <= next_cluster_lba;
|
454 |
|
|
end if;
|
455 |
|
|
if rw_state = FIND_NEXT_DIRENT0 then
|
456 |
|
|
perform_block_rd <= '1';
|
457 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC1 then
|
458 |
|
|
perform_block_rd <= '1';
|
459 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER1 then
|
460 |
|
|
perform_block_rd <= '1';
|
461 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC6 then
|
462 |
|
|
perform_block_rd <= '1';
|
463 |
|
|
else
|
464 |
|
|
perform_block_rd <= '0';
|
465 |
|
|
end if;
|
466 |
|
|
if rw_state = FIND_NEXT_DIRENT2 then
|
467 |
|
|
block_rd_addr <= find_dirent_addr;
|
468 |
|
|
elsif rw_state = FIND_NEXT_DIRENT3 then
|
469 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & C_attrib_offset;
|
470 |
|
|
elsif rw_state = PARSE_NAME_DIRENT1 then
|
471 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(30, 5);
|
472 |
|
|
elsif rw_state = PARSE_NAME_DIRENT2 then
|
473 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(28,5);
|
474 |
|
|
elsif rw_state = PARSE_NAME_DIRENT3 then
|
475 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(24,5);
|
476 |
|
|
elsif rw_state = PARSE_NAME_DIRENT4 then
|
477 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(22,5);
|
478 |
|
|
elsif rw_state = PARSE_NAME_DIRENT5 then
|
479 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(20,5);
|
480 |
|
|
elsif rw_state = PARSE_NAME_DIRENT6 then
|
481 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(18,5);
|
482 |
|
|
elsif rw_state = PARSE_NAME_DIRENT7 then
|
483 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(16,5);
|
484 |
|
|
elsif rw_state = PARSE_NAME_DIRENT8 then
|
485 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(14,5);
|
486 |
|
|
elsif rw_state = PARSE_NAME_DIRENT9 then
|
487 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(9, 5);
|
488 |
|
|
elsif rw_state = PARSE_NAME_DIRENT10 then
|
489 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(7, 5);
|
490 |
|
|
elsif rw_state = PARSE_NAME_DIRENT11 then
|
491 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(5, 5);
|
492 |
|
|
elsif rw_state = PARSE_NAME_DIRENT12 then
|
493 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(3, 5);
|
494 |
|
|
elsif rw_state = PARSE_NAME_DIRENT13 then
|
495 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & to_unsigned(1, 5);
|
496 |
|
|
elsif rw_state = PARSE_NAME_DIRENT15 then
|
497 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & C_attrib_offset;
|
498 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT0 then
|
499 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & C_lsb_word_lsb_offset;
|
500 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT1 then
|
501 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & C_lsb_word_msb_offset;
|
502 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT2 then
|
503 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & C_msb_word_lsb_offset;
|
504 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT3 then
|
505 |
|
|
block_rd_addr <= find_dirent_addr(8 downto 5) & C_msb_word_msb_offset;
|
506 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER3 then
|
507 |
|
|
block_rd_addr <= current_cluster_buf(6 downto 0) & "00";
|
508 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER4 then
|
509 |
|
|
block_rd_addr <= current_cluster_buf(6 downto 0) & "01";
|
510 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER5 then
|
511 |
|
|
block_rd_addr <= current_cluster_buf(6 downto 0) & "10";
|
512 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER6 then
|
513 |
|
|
block_rd_addr <= current_cluster_buf(6 downto 0) & "11";
|
514 |
|
|
end if;
|
515 |
|
|
if rw_state = FIND_NEXT_CLUSTER2 then
|
516 |
|
|
current_cluster_buf <= current_cluster;
|
517 |
|
|
end if;
|
518 |
|
|
if rw_state = FIND_NEXT_DIRENT6 then
|
519 |
|
|
rw_state_cached <= FIND_NEXT_DIRENT2;
|
520 |
|
|
elsif rw_state = PARSE_NAME_DIRENT14 then
|
521 |
|
|
rw_state_cached <= PARSE_NAME_DIRENT15;
|
522 |
|
|
elsif rw_state = HANDLE_FILE_DIRENT0 then
|
523 |
|
|
rw_state_cached <= IDLE_NO_BLOCK_RD;
|
524 |
|
|
end if;
|
525 |
|
|
if rw_state = HANDLE_FILE_DIRENT0 then
|
526 |
|
|
file_counter <= file_counter + 1;
|
527 |
|
|
elsif rw_state = HANDLE_END_OF_DIRENTS1 and DEBUG_IN(0) = '1' then
|
528 |
|
|
file_counter <= (others => '0');
|
529 |
|
|
end if;
|
530 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT9 then
|
531 |
|
|
find_dirent_addr <= (others => '0');
|
532 |
|
|
elsif rw_state = HANDLE_END_OF_DIR0 then
|
533 |
|
|
find_dirent_addr <= find_dirent_addr_rd;
|
534 |
|
|
elsif rw_state = HANDLE_END_OF_DIRENTS0 then
|
535 |
|
|
find_dirent_addr <= (others => '0');
|
536 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC0 then
|
537 |
|
|
find_dirent_addr <= find_dirent_addr + "000100000";
|
538 |
|
|
end if;
|
539 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT0 then
|
540 |
|
|
find_dirent_addr_cache <= find_dirent_addr + "000100000";
|
541 |
|
|
end if;
|
542 |
|
|
if rw_state = HANDLE_INTERNAL_ADDR_INC1 then
|
543 |
|
|
if find_dirent_block_num = sectors_per_cluster_zero_indexed then
|
544 |
|
|
find_dirent_block_num <= (others => '0');
|
545 |
|
|
else
|
546 |
|
|
find_dirent_block_num <= find_dirent_block_num + 1;
|
547 |
|
|
end if;
|
548 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT9 then
|
549 |
|
|
find_dirent_block_num <= (others => '0');
|
550 |
|
|
elsif rw_state = HANDLE_END_OF_DIR0 then
|
551 |
|
|
find_dirent_block_num <= find_dirent_block_num_rd;
|
552 |
|
|
end if;
|
553 |
|
|
end if;
|
554 |
|
|
end process;
|
555 |
|
|
|
556 |
|
|
DIRENT_LIFO: process(CLK_IN)
|
557 |
|
|
begin
|
558 |
|
|
if rising_edge(CLK_IN) then
|
559 |
|
|
if rw_next_state = PARSE_NAME_DIRENT0 then
|
560 |
|
|
dirent_lifo_rst <= '1';
|
561 |
|
|
else
|
562 |
|
|
dirent_lifo_rst <= '0';
|
563 |
|
|
end if;
|
564 |
|
|
if rw_state = PARSE_NAME_DIRENT2 then
|
565 |
|
|
dirent_lifo_we <= '1';
|
566 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC0 then
|
567 |
|
|
dirent_lifo_we <= '0';
|
568 |
|
|
end if;
|
569 |
|
|
end if;
|
570 |
|
|
end process;
|
571 |
|
|
|
572 |
|
|
dirent_name_lifo : lifo
|
573 |
|
|
Generic Map ( G_LOG2_DEPTH => 7,
|
574 |
|
|
G_DATA_SIZE => block_rd_data'length )
|
575 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
576 |
|
|
RESET_IN => dirent_lifo_rst,
|
577 |
|
|
CACHE_ADDR_IN => dirent_lifo_cache_addr,
|
578 |
|
|
GOTO_CACHE_IN => dirent_lifo_goto_cache,
|
579 |
|
|
WR_DATA_IN => block_rd_data,
|
580 |
|
|
WR_EN_IN => dirent_lifo_we,
|
581 |
|
|
RD_DATA_OUT => DIRENT_CHAR_OUT,
|
582 |
|
|
RD_EN_IN => RD_DIRENT_NAME_CHAR_IN,
|
583 |
|
|
EMPTY_OUT => dirent_lifo_empty,
|
584 |
|
|
FULL_OUT => dirent_lifo_full);
|
585 |
|
|
|
586 |
|
|
HANDLE_FOLDER_DIRENT: process(CLK_IN)
|
587 |
|
|
begin
|
588 |
|
|
if rising_edge(CLK_IN) then
|
589 |
|
|
if rw_next_state = HANDLE_FOLDER_DIRENT0 or rw_next_state = HANDLE_FILE_DIRENT0 then
|
590 |
|
|
dirent_found <= '1';
|
591 |
|
|
else
|
592 |
|
|
dirent_found <= '0';
|
593 |
|
|
end if;
|
594 |
|
|
if rw_next_state = HANDLE_FOLDER_DIRENT0 then
|
595 |
|
|
dirent_is_folder <= '1';
|
596 |
|
|
else
|
597 |
|
|
dirent_is_folder <= '0';
|
598 |
|
|
end if;
|
599 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT2 then
|
600 |
|
|
folder_addr(7 downto 0) <= unsigned(block_rd_data);
|
601 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT3 then
|
602 |
|
|
folder_addr(15 downto 8) <= unsigned(block_rd_data);
|
603 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT4 then
|
604 |
|
|
folder_addr(23 downto 16) <= unsigned(block_rd_data);
|
605 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT5 then
|
606 |
|
|
folder_addr(31 downto 24) <= unsigned(block_rd_data);
|
607 |
|
|
end if;
|
608 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT6 then
|
609 |
|
|
folder_addr_tmp <= (folder_addr - 2);
|
610 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT7 then
|
611 |
|
|
folder_addr_tmp(31 downto 1) <= folder_addr_tmp(30 downto 0);
|
612 |
|
|
folder_addr_tmp(0) <= '0';
|
613 |
|
|
end if;
|
614 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT8 then
|
615 |
|
|
folder_addr_final <= folder_addr_tmp + cluster_begin_addr;
|
616 |
|
|
end if;
|
617 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT7 or rw_state = HANDLE_INTERNAL_ADDR_INC4 then
|
618 |
|
|
spc_counter(7 downto 1) <= spc_counter(6 downto 0);
|
619 |
|
|
spc_counter(0) <= '0';
|
620 |
|
|
else
|
621 |
|
|
spc_counter <= X"02";
|
622 |
|
|
end if;
|
623 |
|
|
|
624 |
|
|
|
625 |
|
|
|
626 |
|
|
end if;
|
627 |
|
|
end process;
|
628 |
|
|
|
629 |
|
|
HANDLE_BP_CACHING: process(CLK_IN)
|
630 |
|
|
begin
|
631 |
|
|
if rising_edge(CLK_IN) then
|
632 |
|
|
if rw_state = HANDLE_FOLDER_DIRENT0 then
|
633 |
|
|
bp_lifo_we <= '1';
|
634 |
|
|
else
|
635 |
|
|
bp_lifo_we <= '0';
|
636 |
|
|
end if;
|
637 |
|
|
if rw_next_state = HANDLE_END_OF_DIR0 then
|
638 |
|
|
bp_lifo_rd <= '1';
|
639 |
|
|
else
|
640 |
|
|
bp_lifo_rd <= '0';
|
641 |
|
|
end if;
|
642 |
|
|
end if;
|
643 |
|
|
end process;
|
644 |
|
|
|
645 |
|
|
sd_block_pointer_lifo : lifo
|
646 |
|
|
Generic Map ( G_LOG2_DEPTH => 5,
|
647 |
|
|
G_DATA_SIZE => sd_block_addr'length )
|
648 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
649 |
|
|
RESET_IN => bp_lifo_rst,
|
650 |
|
|
CACHE_ADDR_IN => '0',
|
651 |
|
|
GOTO_CACHE_IN => '0',
|
652 |
|
|
WR_DATA_IN => slv(sd_block_addr),
|
653 |
|
|
WR_EN_IN => bp_lifo_we,
|
654 |
|
|
RD_DATA_OUT => bp_lifo_block_data,
|
655 |
|
|
RD_EN_IN => bp_lifo_rd,
|
656 |
|
|
EMPTY_OUT => bp_lifo_empty,
|
657 |
|
|
FULL_OUT => open);
|
658 |
|
|
|
659 |
|
|
find_addr_lifo_we <= bp_lifo_we;
|
660 |
|
|
find_addr_lifo_rd <= bp_lifo_rd;
|
661 |
|
|
find_dirent_addr_rd <= unsigned(find_dirent_addr_rd_slv);
|
662 |
|
|
|
663 |
|
|
find_dirent_addr_lifo : lifo
|
664 |
|
|
Generic Map ( G_LOG2_DEPTH => 5,
|
665 |
|
|
G_DATA_SIZE => find_dirent_addr'length )
|
666 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
667 |
|
|
RESET_IN => find_addr_lifo_rst,
|
668 |
|
|
CACHE_ADDR_IN => '0',
|
669 |
|
|
GOTO_CACHE_IN => '0',
|
670 |
|
|
WR_DATA_IN => slv(find_dirent_addr_cache),
|
671 |
|
|
WR_EN_IN => find_addr_lifo_we,
|
672 |
|
|
RD_DATA_OUT => find_dirent_addr_rd_slv,
|
673 |
|
|
RD_EN_IN => find_addr_lifo_rd,
|
674 |
|
|
EMPTY_OUT => find_addr_lifo_empty,
|
675 |
|
|
FULL_OUT => open);
|
676 |
|
|
|
677 |
|
|
HANDLE_END_FLAG: process(CLK_IN)
|
678 |
|
|
begin
|
679 |
|
|
if rising_edge(CLK_IN) then
|
680 |
|
|
if rw_state = HANDLE_END_OF_DIRENTS0 then
|
681 |
|
|
end_of_dirents <= '1';
|
682 |
|
|
elsif rw_state = FIND_NEXT_DIRENT0 then
|
683 |
|
|
end_of_dirents <= '0';
|
684 |
|
|
end if;
|
685 |
|
|
end if;
|
686 |
|
|
end process;
|
687 |
|
|
|
688 |
|
|
GOTO_NEXT_CLUSTER: process(CLK_IN)
|
689 |
|
|
begin
|
690 |
|
|
if rising_edge(CLK_IN) then
|
691 |
|
|
if rw_state = FIND_NEXT_CLUSTER0 then
|
692 |
|
|
current_cluster_fat_block_addr <= fat_begin_addr + RESIZE(current_cluster(31 downto 7), 32);
|
693 |
|
|
end if;
|
694 |
|
|
if rw_state = FIND_NEXT_CLUSTER5 then
|
695 |
|
|
current_cluster(7 downto 0) <= unsigned(block_rd_data);
|
696 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER6 then
|
697 |
|
|
current_cluster(15 downto 8) <= unsigned(block_rd_data);
|
698 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER7 then
|
699 |
|
|
current_cluster(23 downto 16) <= unsigned(block_rd_data);
|
700 |
|
|
elsif rw_state = FIND_NEXT_CLUSTER8 then
|
701 |
|
|
current_cluster(31 downto 24) <= unsigned(block_rd_data); -- TODO Check if equal to 0FFFFFFF (end of cluster) ?
|
702 |
|
|
elsif rw_state = HANDLE_FOLDER_DIRENT6 then
|
703 |
|
|
current_cluster <= folder_addr;
|
704 |
|
|
elsif rw_state = WAIT_FOR_INIT_CMPLT or rw_state = HANDLE_END_OF_DIRENTS0 then
|
705 |
|
|
current_cluster <= X"00000002"; -- TODO Set to ROOT_DIR_FIRST_CLUSTER_IN ?
|
706 |
|
|
elsif rw_state = HANDLE_END_OF_DIR0 then
|
707 |
|
|
current_cluster <= current_cluster_rd;
|
708 |
|
|
end if;
|
709 |
|
|
if rw_state = HANDLE_INTERNAL_ADDR_INC3 then
|
710 |
|
|
current_cluster_tmp <= (current_cluster - 2);
|
711 |
|
|
elsif rw_state = HANDLE_INTERNAL_ADDR_INC4 then
|
712 |
|
|
current_cluster_tmp(31 downto 1) <= current_cluster_tmp(30 downto 0);
|
713 |
|
|
current_cluster_tmp(0) <= '0';
|
714 |
|
|
end if;
|
715 |
|
|
if rw_state = HANDLE_INTERNAL_ADDR_INC5 then
|
716 |
|
|
next_cluster_lba <= current_cluster_tmp + cluster_begin_addr;
|
717 |
|
|
end if;
|
718 |
|
|
end if;
|
719 |
|
|
end process;
|
720 |
|
|
|
721 |
|
|
current_cluster_lifo_we <= bp_lifo_we;
|
722 |
|
|
current_cluster_lifo_rd <= bp_lifo_rd;
|
723 |
|
|
current_cluster_rd <= unsigned(current_cluster_rd_slv);
|
724 |
|
|
|
725 |
|
|
current_cluster_lifo : lifo
|
726 |
|
|
Generic Map ( G_LOG2_DEPTH => 5,
|
727 |
|
|
G_DATA_SIZE => current_cluster'length )
|
728 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
729 |
|
|
RESET_IN => current_cluster_lifo_rst,
|
730 |
|
|
CACHE_ADDR_IN => '0',
|
731 |
|
|
GOTO_CACHE_IN => '0',
|
732 |
|
|
WR_DATA_IN => slv(current_cluster),
|
733 |
|
|
WR_EN_IN => current_cluster_lifo_we,
|
734 |
|
|
RD_DATA_OUT => current_cluster_rd_slv,
|
735 |
|
|
RD_EN_IN => current_cluster_lifo_rd,
|
736 |
|
|
EMPTY_OUT => current_cluster_lifo_empty,
|
737 |
|
|
FULL_OUT => open);
|
738 |
|
|
|
739 |
|
|
find_dirent_block_lifo_we <= bp_lifo_we;
|
740 |
|
|
find_dirent_block_lifo_rd <= bp_lifo_rd;
|
741 |
|
|
find_dirent_block_num_rd <= unsigned(find_dirent_block_num_rd_slv);
|
742 |
|
|
|
743 |
|
|
find_dirent_block_num_lifo : lifo
|
744 |
|
|
Generic Map ( G_LOG2_DEPTH => 5,
|
745 |
|
|
G_DATA_SIZE => find_dirent_block_num'length )
|
746 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
747 |
|
|
RESET_IN => find_dirent_block_lifo_rst,
|
748 |
|
|
CACHE_ADDR_IN => '0',
|
749 |
|
|
GOTO_CACHE_IN => '0',
|
750 |
|
|
WR_DATA_IN => slv(find_dirent_block_num),
|
751 |
|
|
WR_EN_IN => find_dirent_block_lifo_we,
|
752 |
|
|
RD_DATA_OUT => find_dirent_block_num_rd_slv,
|
753 |
|
|
RD_EN_IN => find_dirent_block_lifo_rd,
|
754 |
|
|
EMPTY_OUT => find_dirent_block_lifo_empty,
|
755 |
|
|
FULL_OUT => open);
|
756 |
|
|
|
757 |
|
|
LIFO_RST_PROC : process(CLK_IN)
|
758 |
|
|
begin
|
759 |
|
|
if rising_edge(CLK_IN) then
|
760 |
|
|
if rw_state = HANDLE_END_OF_DIRENTS0 then
|
761 |
|
|
find_dirent_block_lifo_rst <= '1';
|
762 |
|
|
current_cluster_lifo_rst <= '1';
|
763 |
|
|
find_addr_lifo_rst <= '1';
|
764 |
|
|
bp_lifo_rst <= '1';
|
765 |
|
|
else
|
766 |
|
|
find_dirent_block_lifo_rst <= '0';
|
767 |
|
|
current_cluster_lifo_rst <= '0';
|
768 |
|
|
find_addr_lifo_rst <= '0';
|
769 |
|
|
bp_lifo_rst <= '0';
|
770 |
|
|
end if;
|
771 |
|
|
end if;
|
772 |
|
|
end process;
|
773 |
|
|
|
774 |
|
|
----------- MAIN FSM ------------
|
775 |
|
|
|
776 |
|
|
MAIN_ROUTINE_SYNC: process(CLK_IN)
|
777 |
|
|
begin
|
778 |
|
|
if rising_edge(CLK_IN) then
|
779 |
|
|
if RESET_IN = '0' then
|
780 |
|
|
rw_state <= rw_next_state;
|
781 |
|
|
else
|
782 |
|
|
rw_state <= IDLE_W_BLOCK_RD;
|
783 |
|
|
end if;
|
784 |
|
|
end if;
|
785 |
|
|
end process;
|
786 |
|
|
|
787 |
|
|
MAIN_ROUTINE_DECODE: process ( sd_init_cmplt,
|
788 |
|
|
block_rd_cmplt,
|
789 |
|
|
block_rd_cmplt
|
790 |
|
|
)
|
791 |
|
|
begin
|
792 |
|
|
rw_next_state <= rw_state; -- default is to stay in current state
|
793 |
|
|
case (rw_state) is
|
794 |
|
|
when REPORT_ERROR =>
|
795 |
|
|
rw_next_state <= WAIT_FOR_INIT_CMPLT;
|
796 |
|
|
when WAIT_FOR_INIT_CMPLT =>
|
797 |
|
|
if sd_init_cmplt = '1' then
|
798 |
|
|
rw_next_state <= IDLE_W_BLOCK_RD;
|
799 |
|
|
end if;
|
800 |
|
|
|
801 |
|
|
when IDLE_W_BLOCK_RD =>
|
802 |
|
|
if get_next_dirent = '1' then
|
803 |
|
|
rw_next_state <= FIND_NEXT_DIRENT0;
|
804 |
|
|
end if;
|
805 |
|
|
when IDLE_NO_BLOCK_RD =>
|
806 |
|
|
if get_next_dirent = '1' then
|
807 |
|
|
rw_next_state <= FIND_NEXT_DIRENT2;
|
808 |
|
|
end if;
|
809 |
|
|
|
810 |
|
|
when FIND_NEXT_DIRENT0 =>
|
811 |
|
|
rw_next_state <= FIND_NEXT_DIRENT1;
|
812 |
|
|
when FIND_NEXT_DIRENT1 =>
|
813 |
|
|
if block_rd_cmplt = '1' then
|
814 |
|
|
rw_next_state <= FIND_NEXT_DIRENT2;
|
815 |
|
|
end if;
|
816 |
|
|
when FIND_NEXT_DIRENT2 =>
|
817 |
|
|
rw_next_state <= FIND_NEXT_DIRENT3;
|
818 |
|
|
when FIND_NEXT_DIRENT3 =>
|
819 |
|
|
rw_next_state <= FIND_NEXT_DIRENT4;
|
820 |
|
|
when FIND_NEXT_DIRENT4 =>
|
821 |
|
|
if block_rd_data = C_unused_entry then
|
822 |
|
|
rw_next_state <= FIND_NEXT_DIRENT6;
|
823 |
|
|
elsif block_rd_data = C_end_of_directory then
|
824 |
|
|
rw_next_state <= HANDLE_END_OF_DIR0;
|
825 |
|
|
else
|
826 |
|
|
rw_next_state <= FIND_NEXT_DIRENT5;
|
827 |
|
|
end if;
|
828 |
|
|
when FIND_NEXT_DIRENT5 =>
|
829 |
|
|
if block_rd_data /= C_file_name_type then
|
830 |
|
|
rw_next_state <= FIND_NEXT_DIRENT6;
|
831 |
|
|
else
|
832 |
|
|
rw_next_state <= PARSE_NAME_DIRENT0;
|
833 |
|
|
end if;
|
834 |
|
|
when FIND_NEXT_DIRENT6 =>
|
835 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC0;
|
836 |
|
|
|
837 |
|
|
when PARSE_NAME_DIRENT0 =>
|
838 |
|
|
rw_next_state <= PARSE_NAME_DIRENT1;
|
839 |
|
|
when PARSE_NAME_DIRENT1 =>
|
840 |
|
|
rw_next_state <= PARSE_NAME_DIRENT2;
|
841 |
|
|
when PARSE_NAME_DIRENT2 =>
|
842 |
|
|
rw_next_state <= PARSE_NAME_DIRENT3;
|
843 |
|
|
when PARSE_NAME_DIRENT3 =>
|
844 |
|
|
rw_next_state <= PARSE_NAME_DIRENT4;
|
845 |
|
|
when PARSE_NAME_DIRENT4 =>
|
846 |
|
|
rw_next_state <= PARSE_NAME_DIRENT5;
|
847 |
|
|
when PARSE_NAME_DIRENT5 =>
|
848 |
|
|
rw_next_state <= PARSE_NAME_DIRENT6;
|
849 |
|
|
when PARSE_NAME_DIRENT6 =>
|
850 |
|
|
rw_next_state <= PARSE_NAME_DIRENT7;
|
851 |
|
|
when PARSE_NAME_DIRENT7 =>
|
852 |
|
|
rw_next_state <= PARSE_NAME_DIRENT8;
|
853 |
|
|
when PARSE_NAME_DIRENT8 =>
|
854 |
|
|
rw_next_state <= PARSE_NAME_DIRENT9;
|
855 |
|
|
when PARSE_NAME_DIRENT9 =>
|
856 |
|
|
rw_next_state <= PARSE_NAME_DIRENT10;
|
857 |
|
|
when PARSE_NAME_DIRENT10 =>
|
858 |
|
|
rw_next_state <= PARSE_NAME_DIRENT11;
|
859 |
|
|
when PARSE_NAME_DIRENT11 =>
|
860 |
|
|
rw_next_state <= PARSE_NAME_DIRENT12;
|
861 |
|
|
when PARSE_NAME_DIRENT12 =>
|
862 |
|
|
rw_next_state <= PARSE_NAME_DIRENT13;
|
863 |
|
|
when PARSE_NAME_DIRENT13 =>
|
864 |
|
|
rw_next_state <= PARSE_NAME_DIRENT14;
|
865 |
|
|
when PARSE_NAME_DIRENT14 =>
|
866 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC0;
|
867 |
|
|
when PARSE_NAME_DIRENT15 =>
|
868 |
|
|
rw_next_state <= PARSE_NAME_DIRENT16;
|
869 |
|
|
when PARSE_NAME_DIRENT16 =>
|
870 |
|
|
rw_next_state <= PARSE_NAME_DIRENT17;
|
871 |
|
|
when PARSE_NAME_DIRENT17 =>
|
872 |
|
|
if block_rd_data = C_file_name_type then
|
873 |
|
|
rw_next_state <= PARSE_NAME_DIRENT1;
|
874 |
|
|
elsif block_rd_data(7 downto 4) = C_folder_type(7 downto 4) then
|
875 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT0;
|
876 |
|
|
elsif block_rd_data(7 downto 4) = C_file_type(7 downto 4) then
|
877 |
|
|
rw_next_state <= HANDLE_FILE_DIRENT0; -- TODO create 'else' case to prevent lockups
|
878 |
|
|
end if;
|
879 |
|
|
|
880 |
|
|
when HANDLE_FILE_DIRENT0 =>
|
881 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC0;
|
882 |
|
|
|
883 |
|
|
when HANDLE_END_OF_DIR0 =>
|
884 |
|
|
if bp_lifo_empty = '0' then
|
885 |
|
|
rw_next_state <= HANDLE_END_OF_DIR1;
|
886 |
|
|
else
|
887 |
|
|
rw_next_state <= HANDLE_END_OF_DIRENTS0;
|
888 |
|
|
end if;
|
889 |
|
|
when HANDLE_END_OF_DIR1 =>
|
890 |
|
|
rw_next_state <= HANDLE_END_OF_DIR2;
|
891 |
|
|
when HANDLE_END_OF_DIR2 =>
|
892 |
|
|
rw_next_state <= HANDLE_END_OF_DIR3;
|
893 |
|
|
when HANDLE_END_OF_DIR3 =>
|
894 |
|
|
rw_next_state <= IDLE_W_BLOCK_RD;
|
895 |
|
|
|
896 |
|
|
when HANDLE_FOLDER_DIRENT0 =>
|
897 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT1;
|
898 |
|
|
when HANDLE_FOLDER_DIRENT1 =>
|
899 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT2;
|
900 |
|
|
when HANDLE_FOLDER_DIRENT2 =>
|
901 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT3;
|
902 |
|
|
when HANDLE_FOLDER_DIRENT3 =>
|
903 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT4;
|
904 |
|
|
when HANDLE_FOLDER_DIRENT4 =>
|
905 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT5;
|
906 |
|
|
when HANDLE_FOLDER_DIRENT5 =>
|
907 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT6;
|
908 |
|
|
when HANDLE_FOLDER_DIRENT6 =>
|
909 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT7;
|
910 |
|
|
when HANDLE_FOLDER_DIRENT7 =>
|
911 |
|
|
if spc_counter = sectors_per_cluster then
|
912 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT8;
|
913 |
|
|
end if;
|
914 |
|
|
when HANDLE_FOLDER_DIRENT8 =>
|
915 |
|
|
rw_next_state <= HANDLE_FOLDER_DIRENT9;
|
916 |
|
|
when HANDLE_FOLDER_DIRENT9 =>
|
917 |
|
|
rw_next_state <= IDLE_W_BLOCK_RD;
|
918 |
|
|
|
919 |
|
|
when HANDLE_END_OF_DIRENTS0 =>
|
920 |
|
|
rw_next_state <= HANDLE_END_OF_DIRENTS1;
|
921 |
|
|
when HANDLE_END_OF_DIRENTS1 =>
|
922 |
|
|
if DEBUG_IN(0) = '1' then
|
923 |
|
|
rw_next_state <= IDLE_W_BLOCK_RD;
|
924 |
|
|
end if;
|
925 |
|
|
|
926 |
|
|
when HANDLE_INTERNAL_ADDR_INC0 =>
|
927 |
|
|
if find_dirent_addr(8 downto 5) = "1111" then
|
928 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC1;
|
929 |
|
|
else
|
930 |
|
|
rw_next_state <= rw_state_cached;
|
931 |
|
|
end if;
|
932 |
|
|
when HANDLE_INTERNAL_ADDR_INC1 =>
|
933 |
|
|
if find_dirent_block_num = sectors_per_cluster_zero_indexed then
|
934 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER0;
|
935 |
|
|
else
|
936 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC2;
|
937 |
|
|
end if;
|
938 |
|
|
when HANDLE_INTERNAL_ADDR_INC2 =>
|
939 |
|
|
if block_rd_cmplt = '1' then
|
940 |
|
|
rw_next_state <= rw_state_cached;
|
941 |
|
|
end if;
|
942 |
|
|
when HANDLE_INTERNAL_ADDR_INC3 =>
|
943 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC4;
|
944 |
|
|
when HANDLE_INTERNAL_ADDR_INC4 =>
|
945 |
|
|
if spc_counter = sectors_per_cluster then
|
946 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC5;
|
947 |
|
|
end if;
|
948 |
|
|
when HANDLE_INTERNAL_ADDR_INC5 =>
|
949 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC6;
|
950 |
|
|
when HANDLE_INTERNAL_ADDR_INC6 =>
|
951 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC7;
|
952 |
|
|
when HANDLE_INTERNAL_ADDR_INC7 =>
|
953 |
|
|
if block_rd_cmplt = '1' then
|
954 |
|
|
rw_next_state <= rw_state_cached;
|
955 |
|
|
end if;
|
956 |
|
|
|
957 |
|
|
when FIND_NEXT_CLUSTER0 =>
|
958 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER1;
|
959 |
|
|
when FIND_NEXT_CLUSTER1 =>
|
960 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER2;
|
961 |
|
|
when FIND_NEXT_CLUSTER2 =>
|
962 |
|
|
if block_rd_cmplt = '1' then
|
963 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER3;
|
964 |
|
|
end if;
|
965 |
|
|
when FIND_NEXT_CLUSTER3 =>
|
966 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER4;
|
967 |
|
|
when FIND_NEXT_CLUSTER4 =>
|
968 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER5;
|
969 |
|
|
when FIND_NEXT_CLUSTER5 =>
|
970 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER6;
|
971 |
|
|
when FIND_NEXT_CLUSTER6 =>
|
972 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER7;
|
973 |
|
|
when FIND_NEXT_CLUSTER7 =>
|
974 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER8;
|
975 |
|
|
when FIND_NEXT_CLUSTER8 =>
|
976 |
|
|
rw_next_state <= FIND_NEXT_CLUSTER9;
|
977 |
|
|
when FIND_NEXT_CLUSTER9 =>
|
978 |
|
|
rw_next_state <= HANDLE_INTERNAL_ADDR_INC3;
|
979 |
|
|
|
980 |
|
|
end case;
|
981 |
|
|
end process;
|
982 |
|
|
|
983 |
|
|
----------- BLOCK READ FSM ------------
|
984 |
|
|
|
985 |
|
|
BLOCK_READ_SYNC: process(CLK_IN)
|
986 |
|
|
begin
|
987 |
|
|
if rising_edge(CLK_IN) then
|
988 |
|
|
br_state <= br_next_state;
|
989 |
|
|
end if;
|
990 |
|
|
end process;
|
991 |
|
|
|
992 |
|
|
BLOCK_READ_FLAGS: process(CLK_IN)
|
993 |
|
|
begin
|
994 |
|
|
if rising_edge(CLK_IN) then
|
995 |
|
|
if br_state = READ_BYTE0 and rd_byte_ack = '1' then
|
996 |
|
|
block_rd_we <= '1';
|
997 |
|
|
else
|
998 |
|
|
block_rd_we <= '0';
|
999 |
|
|
end if;
|
1000 |
|
|
if br_state = READ_BYTE1 then
|
1001 |
|
|
rd_byte <= '1';
|
1002 |
|
|
elsif br_state = READ_BYTE2 and rd_byte_ack = '0' then
|
1003 |
|
|
rd_byte <= '0';
|
1004 |
|
|
end if;
|
1005 |
|
|
if br_state = IDLE then
|
1006 |
|
|
block_wr_addr <= (others => '0');
|
1007 |
|
|
elsif br_state = READ_BYTE1 then
|
1008 |
|
|
block_wr_addr <= block_wr_addr + 1;
|
1009 |
|
|
end if;
|
1010 |
|
|
if br_state = READ_BYTE4 then
|
1011 |
|
|
block_rd_cmplt <= '1';
|
1012 |
|
|
else
|
1013 |
|
|
block_rd_cmplt <= '0';
|
1014 |
|
|
end if;
|
1015 |
|
|
if br_state = WAIT_UNTIL_BLOCK_READ_ACKD then
|
1016 |
|
|
sd_block_rd <= '1';
|
1017 |
|
|
else
|
1018 |
|
|
sd_block_rd <= '0';
|
1019 |
|
|
end if;
|
1020 |
|
|
end if;
|
1021 |
|
|
end process;
|
1022 |
|
|
|
1023 |
|
|
BLOCK_READ_DECODE: process (br_state, perform_block_rd, rd_byte_ack, block_wr_addr)
|
1024 |
|
|
begin
|
1025 |
|
|
br_next_state <= br_state; -- default is to stay in current state
|
1026 |
|
|
case (br_state) is
|
1027 |
|
|
when IDLE =>
|
1028 |
|
|
if perform_block_rd = '1' then
|
1029 |
|
|
br_next_state <= WAIT_UNTIL_NOT_BUSY;
|
1030 |
|
|
end if;
|
1031 |
|
|
when WAIT_UNTIL_NOT_BUSY =>
|
1032 |
|
|
if sd_busy = '0' then
|
1033 |
|
|
br_next_state <= WAIT_UNTIL_BLOCK_READ_ACKD;
|
1034 |
|
|
end if;
|
1035 |
|
|
when WAIT_UNTIL_BLOCK_READ_ACKD =>
|
1036 |
|
|
if sd_busy = '1' then
|
1037 |
|
|
br_next_state <= READ_BYTE0;
|
1038 |
|
|
end if;
|
1039 |
|
|
when READ_BYTE0 =>
|
1040 |
|
|
if rd_byte_ack = '1' then
|
1041 |
|
|
br_next_state <= READ_BYTE1;
|
1042 |
|
|
end if;
|
1043 |
|
|
when READ_BYTE1 =>
|
1044 |
|
|
br_next_state <= READ_BYTE2;
|
1045 |
|
|
when READ_BYTE2 =>
|
1046 |
|
|
if rd_byte_ack = '0' then
|
1047 |
|
|
br_next_state <= READ_BYTE3;
|
1048 |
|
|
end if;
|
1049 |
|
|
when READ_BYTE3 =>
|
1050 |
|
|
if block_wr_addr = "000000000" then
|
1051 |
|
|
br_next_state <= READ_BYTE4;
|
1052 |
|
|
else
|
1053 |
|
|
br_next_state <= READ_BYTE0;
|
1054 |
|
|
end if;
|
1055 |
|
|
when READ_BYTE4 =>
|
1056 |
|
|
br_next_state <= IDLE;
|
1057 |
|
|
end case;
|
1058 |
|
|
end process;
|
1059 |
|
|
|
1060 |
|
|
Block_Ram_Inst : TDP_RAM
|
1061 |
|
|
Generic Map ( G_DATA_A_SIZE => sd_data'length,
|
1062 |
|
|
G_ADDR_A_SIZE => block_wr_addr'length,
|
1063 |
|
|
G_RELATION => 0,
|
1064 |
|
|
G_INIT_FILE => "") --log2(SIZE_A/SIZE_B)
|
1065 |
|
|
Port Map ( CLK_A_IN => CLK_IN,
|
1066 |
|
|
WE_A_IN => block_rd_we,
|
1067 |
|
|
ADDR_A_IN => slv(block_wr_addr),
|
1068 |
|
|
DATA_A_IN => sd_data,
|
1069 |
|
|
DATA_A_OUT => open,
|
1070 |
|
|
CLK_B_IN => CLK_IN,
|
1071 |
|
|
WE_B_IN => '0',
|
1072 |
|
|
ADDR_B_IN => slv(block_rd_addr),
|
1073 |
|
|
DATA_B_IN => X"00",
|
1074 |
|
|
DATA_B_OUT => block_rd_data);
|
1075 |
|
|
|
1076 |
|
|
--DEBUG_OUT2(0) <= '1' when rw_state = PARSE_NAME_DIRENT17 else '0';
|
1077 |
|
|
|
1078 |
|
|
DEBUG_OUT2(5 downto 0) <= slv(state_debug_sig);
|
1079 |
|
|
DEBUG_OUT2(7) <= sd_busy;
|
1080 |
|
|
|
1081 |
|
|
|
1082 |
|
|
DEBUG_OUT <= slv(file_counter(15 downto 0));
|
1083 |
|
|
|
1084 |
|
|
end Behavioral;
|
1085 |
|
|
|