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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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--
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-- SD/MMC Bootloader
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-- SD/MMC Bootloader
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--
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--
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-- $Id: spi_boot.vhd,v 1.4 2005-02-18 06:42:08 arniml Exp $
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-- $Id: spi_boot.vhd,v 1.5 2005-03-08 22:07:12 arniml Exp $
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--
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--
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-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
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-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
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--
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--
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-- All rights reserved, see COPYING.
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-- All rights reserved, see COPYING.
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--
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--
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| Line 48... |
Line 48... |
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entity spi_boot is
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entity spi_boot is
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generic (
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generic (
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-- width of set selection
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width_set_sel_g : integer := 4;
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-- width of bit counter: minimum 6, maximum 12
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-- width of bit counter: minimum 6, maximum 12
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width_bit_cnt_g : integer := 6;
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width_bit_cnt_g : integer := 6;
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-- width of image counter: minimum 0, maximum n
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-- width of image counter: minimum 0, maximum n
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width_img_cnt_g : integer := 2;
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width_img_cnt_g : integer := 2;
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-- number of bits required to address one image
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-- number of bits required to address one image
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Line 69... |
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port (
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port (
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-- System Interface -------------------------------------------------------
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-- System Interface -------------------------------------------------------
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clk_i : in std_logic;
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clk_i : in std_logic;
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reset_i : in std_logic;
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reset_i : in std_logic;
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set_sel_n_i : in std_logic_vector(width_set_sel_g-1 downto 0);
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-- Card Interface ---------------------------------------------------------
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-- Card Interface ---------------------------------------------------------
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spi_clk_o : out std_logic;
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spi_clk_o : out std_logic;
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spi_cs_n_o : out std_logic;
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spi_cs_n_o : out std_logic;
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spi_data_in_i : in std_logic;
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spi_data_in_i : in std_logic;
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spi_data_out_o : out std_logic;
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spi_data_out_o : out std_logic;
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transmit: process (ctrl_fsm_q,
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transmit: process (ctrl_fsm_q,
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cmd_fsm_q,
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cmd_fsm_q,
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bit_cnt_q,
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bit_cnt_q,
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img_cnt_s,
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img_cnt_s,
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send_cmd12_q,
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send_cmd12_q,
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set_sel_n_i,
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upper_bitcnt_zero_s)
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upper_bitcnt_zero_s)
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subtype cmd_r is natural range 47 downto 0;
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subtype cmd_r is natural range 47 downto 0;
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subtype cmd_t is std_logic_vector(cmd_r);
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subtype cmd_t is std_logic_vector(cmd_r);
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subtype ext_cmd_t is std_logic_vector(63 downto 0);
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subtype ext_cmd_t is std_logic_vector(63 downto 0);
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Line 816... |
constant acmd41_c : cmd_t := "0110100100000000000000000000000000000000-------1";
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constant acmd41_c : cmd_t := "0110100100000000000000000000000000000000-------1";
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variable cmd_v : ext_cmd_t;
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variable cmd_v : ext_cmd_t;
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variable tx_v : boolean;
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variable tx_v : boolean;
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variable set_sel_v : std_logic_vector(width_set_sel_g-1 downto 0);
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begin
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begin
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-- default assignments
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-- default assignments
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spi_dat_s <= '1';
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spi_dat_s <= '1';
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cmd_v := (others => '1');
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cmd_v := (others => '1');
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tx_v := false;
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tx_v := false;
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set_sel_v := not set_sel_n_i;
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if cmd_fsm_q = CMD then
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if cmd_fsm_q = CMD then
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case ctrl_fsm_q is
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case ctrl_fsm_q is
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when CMD0 =>
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when CMD0 =>
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cmd_v(cmd_r) := cmd0_c;
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cmd_v(cmd_r) := cmd0_c;
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Line 839... |
cmd_v(cmd_r) := cmd16_c;
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cmd_v(cmd_r) := cmd16_c;
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cmd_v(8 + width_bit_cnt_g-3) := '1';
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cmd_v(8 + width_bit_cnt_g-3) := '1';
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tx_v := true;
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tx_v := true;
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when CMD18 =>
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when CMD18 =>
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cmd_v(cmd_r) := cmd18_c;
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cmd_v(cmd_r) := cmd18_c;
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cmd_v(8 + num_bits_per_img_g + width_img_cnt_g downto 8 + num_bits_per_img_g)
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-- insert image counter
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:= img_cnt_s;
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cmd_v(8 + num_bits_per_img_g + width_img_cnt_g
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downto 8 + num_bits_per_img_g) := img_cnt_s;
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-- insert set selection
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cmd_v(8 + num_bits_per_img_g + width_img_cnt_g + width_set_sel_g-1
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downto 8 + num_bits_per_img_g + width_img_cnt_g) := set_sel_v;
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tx_v := true;
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tx_v := true;
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when CMD18_DATA =>
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when CMD18_DATA =>
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cmd_v(cmd_r) := cmd12_c;
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cmd_v(cmd_r) := cmd12_c;
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if send_cmd12_q and upper_bitcnt_zero_s then
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if send_cmd12_q and upper_bitcnt_zero_s then
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- File History:
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-- File History:
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--
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--
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-- $Log: not supported by cvs2svn $
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-- $Log: not supported by cvs2svn $
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-- Revision 1.4 2005/02/18 06:42:08 arniml
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-- clarify wording for images
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--
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-- Revision 1.3 2005/02/16 18:59:10 arniml
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-- Revision 1.3 2005/02/16 18:59:10 arniml
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-- include output enable control for SPI outputs
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-- include output enable control for SPI outputs
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--
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--
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-- Revision 1.2 2005/02/13 17:25:51 arniml
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-- Revision 1.2 2005/02/13 17:25:51 arniml
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-- major update to fix several problems
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-- major update to fix several problems
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