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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 =>
|
| 293 |
|
|
state_debug_sig <= to_unsigned(3, 6);
|
| 294 |
|
|
when FIND_NEXT_DIRENT0 =>
|
| 295 |
|
|
state_debug_sig <= to_unsigned(4, 6);
|
| 296 |
|
|
when FIND_NEXT_DIRENT1 =>
|
| 297 |
|
|
state_debug_sig <= to_unsigned(5, 6);
|
| 298 |
|
|
when FIND_NEXT_DIRENT2 =>
|
| 299 |
|
|
state_debug_sig <= to_unsigned(6, 6);
|
| 300 |
|
|
when FIND_NEXT_DIRENT3 =>
|
| 301 |
|
|
state_debug_sig <= to_unsigned(7, 6);
|
| 302 |
|
|
when FIND_NEXT_DIRENT4 =>
|
| 303 |
|
|
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 |
|
|
|
