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-------------------------------------------------------------------------------
--
-- SD/MMC Bootloader
-- Chip toplevel design with minimal feature set
--
-- $Id: chip-minimal-a.vhd,v 1.6 2005/04/07 20:44:23 arniml Exp $
--
-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
--
-- All rights reserved, see COPYING.
--
-- Redistribution and use in source and synthezised forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- Redistributions in synthesized form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- Neither the name of the author nor the names of other contributors may
-- be used to endorse or promote products derived from this software without
-- specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
--
-- Please report bugs to the author, but before you do so, please
-- make sure that this is not a derivative work and that
-- you have the latest version of this file.
--
-- The latest version of this file can be found at:
-- http://www.opencores.org/projects.cgi/web/spi_boot/overview
--
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
architecture minimal of chip is
component spi_boot
generic (
width_set_sel_g : integer := 4;
width_bit_cnt_g : integer := 6;
width_img_cnt_g : integer := 2;
num_bits_per_img_g : integer := 18;
sd_init_g : integer := 0;
mmc_compat_clk_div_g : integer := 0;
width_mmc_clk_div_g : integer := 0;
reset_level_g : integer := 0
);
port (
clk_i : in std_logic;
reset_i : in std_logic;
set_sel_i : in std_logic_vector(width_set_sel_g-1 downto 0);
spi_clk_o : out std_logic;
spi_cs_n_o : out std_logic;
spi_data_in_i : in std_logic;
spi_data_out_o : out std_logic;
spi_en_outs_o : out std_logic;
start_i : in std_logic;
mode_i : in std_logic;
config_n_o : out std_logic;
detached_o : out std_logic;
cfg_init_n_i : in std_logic;
cfg_done_i : in std_logic;
dat_done_i : in std_logic;
cfg_clk_o : out std_logic;
cfg_dat_o : out std_logic
);
end component;
signal spi_clk_s : std_logic;
signal spi_cs_n_s : std_logic;
signal spi_data_out_s : std_logic;
signal spi_en_outs_s : std_logic;
signal set_sel_s : std_logic_vector(3 downto 0);
begin
set_sel_s <= not set_sel_n_i;
spi_boot_b : spi_boot
generic map (
width_set_sel_g => 4, -- 16 sets
width_bit_cnt_g => 6, -- 8 bytes per block
width_img_cnt_g => 2, -- 4 images
num_bits_per_img_g => 18, -- 256 kByte per image
sd_init_g => 0, -- no SD specific initialization
mmc_compat_clk_div_g => 0, -- no MMC compatibility
width_mmc_clk_div_g => 0 -- no MMC compatibility
)
port map (
clk_i => clk_i,
reset_i => reset_i,
set_sel_i => set_sel_s,
spi_clk_o => spi_clk_s,
spi_cs_n_o => spi_cs_n_s,
spi_data_in_i => spi_data_in_i,
spi_data_out_o => spi_data_out_s,
spi_en_outs_o => spi_en_outs_s,
start_i => start_i,
mode_i => mode_i,
config_n_o => config_n_o,
detached_o => detached_o,
cfg_init_n_i => cfg_init_n_i,
cfg_done_i => cfg_done_i,
dat_done_i => dat_done_i,
cfg_clk_o => cfg_clk_o,
cfg_dat_o => cfg_dat_o
);
-----------------------------------------------------------------------------
-- Three state drivers for SPI outputs.
-----------------------------------------------------------------------------
spi_clk_o <= spi_clk_s
when spi_en_outs_s = '1' else
'Z';
spi_cs_n_o <= spi_cs_n_s
when spi_en_outs_s = '1' else
'Z';
spi_data_out_o <= spi_data_out_s
when spi_en_outs_s = '1' else
'Z';
end minimal;
-------------------------------------------------------------------------------
-- File History:
--
-- $Log: chip-minimal-a.vhd,v $
-- Revision 1.6 2005/04/07 20:44:23 arniml
-- add new port detached_o
--
-- Revision 1.5 2005/03/09 19:48:34 arniml
-- invert level of set_sel input
--
-- Revision 1.4 2005/03/08 22:07:12 arniml
-- added set selection
--
-- Revision 1.3 2005/02/18 06:42:12 arniml
-- clarify wording for images
--
-- Revision 1.2 2005/02/16 18:54:39 arniml
-- added tri-state drivers for spi outputs
--
-- Revision 1.1 2005/02/08 20:41:31 arniml
-- initial check-in
--
-------------------------------------------------------------------------------
|
