580 lines
35 KiB
VHDL
580 lines
35 KiB
VHDL
---------------------------------------------------------------------------------------------------------
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--
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-- Name: bridge.vhd
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-- Created: November 2018
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-- Author(s): Philip Smart
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-- Description: Sharp MZ series compatible logic IO Control.
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--
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-- This module is the IO control layer which provides io services to the emulation,
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-- which at time of writing can come from the DE10 Nano HPS or the soft-core STORM
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-- or NEO430 microcontroller.
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--
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-- Credits:
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-- Copyright: (c) 2018 Philip Smart <philip.smart@net2net.org>
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--
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-- History: November 2018 - Initial creation.
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--
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---------------------------------------------------------------------------------------------------------
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-- This source file is free software: you can redistribute it and-or modify
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-- it under the terms of the GNU General Public License as published
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-- by the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This source file is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http:--www.gnu.org-licenses->.
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---------------------------------------------------------------------------------------------------------
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library ieee;
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library pkgs;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_unsigned.all;
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use pkgs.config_pkg.all;
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use pkgs.clkgen_pkg.all;
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use pkgs.mctrl_pkg.all;
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entity bridge is
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port(
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-------------------- Clock Input ----------------------------
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clkmaster : in std_logic; -- Master Clock(50MHz)
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clksys : out std_logic; -- System clock.
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clkvid : out std_logic; -- Pixel base clock of video.
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-------------------- Reset ----------------------------
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cold_reset : in std_logic;
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warm_reset : in std_logic;
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-------------------- main_leds ----------------------------
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main_leds : out std_logic_vector(7 downto 0); -- main_leds Green[7:0]
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-------------------- PS2 ----------------------------
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ps2_key : in std_logic_vector(10 downto 0); -- PS2 Key data.
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-------------------- VGA ----------------------------
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vga_hb_o : out std_logic; -- VGA Horizontal Blank
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vga_vb_o : out std_logic; -- VGA Vertical Blank
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vga_hs_o : out std_logic; -- VGA H_SYNC
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vga_vs_o : out std_logic; -- VGA V_SYNC
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vga_r_o : out std_logic_vector(7 downto 0); -- VGA Red[3:0], [7:4] = 0
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vga_g_o : out std_logic_vector(7 downto 0); -- VGA Green[3:0]
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vga_b_o : out std_logic_vector(7 downto 0); -- VGA Blue[3:0]
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-------------------- AUDIO ------------------------------
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audio_l_o : out std_logic;
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audio_r_o : out std_logic;
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uart_rx : in std_logic;
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uart_tx : out std_logic;
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sd_sck : out std_logic;
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sd_mosi : out std_logic;
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sd_miso : in std_logic;
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sd_cs : out std_logic;
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sd_cd : out std_logic;
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-------------------- HPS Interface ------------------------------
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ioctl_download : in std_logic; -- HPS Downloading to FPGA.
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ioctl_upload : in std_logic; -- HPS Uploading from FPGA.
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ioctl_clk : in std_logic; -- HPS I/O Clock.
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ioctl_wr : in std_logic; -- HPS Write Enable to FPGA.
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ioctl_rd : in std_logic; -- HPS Read Enable from FPGA.
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ioctl_addr : in std_logic_vector(24 downto 0); -- HPS Address in FPGA to write into.
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ioctl_dout : in std_logic_vector(15 downto 0); -- HPS Data to be written into FPGA.
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ioctl_din : out std_logic_vector(15 downto 0) -- HPS Data to be read into HPS.
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);
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end bridge;
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architecture rtl of bridge is
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--
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-- Signals.
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--
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signal CON_CLKMASTER : std_logic;
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signal CON_CLKSYS : std_logic;
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signal CON_CLKVID : std_logic;
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signal CON_CLKIOP : std_logic;
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signal CON_COLD_RESET : std_logic;
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signal CON_WARM_RESET : std_logic;
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signal CON_MAIN_LEDS : std_logic_vector(7 downto 0);
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signal CON_PS2_KEY : std_logic_vector(10 downto 0);
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signal CON_VGA_HB_O : std_logic;
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signal CON_VGA_VB_O : std_logic;
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signal CON_VGA_HS_O : std_logic;
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signal CON_VGA_VS_O : std_logic;
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signal CON_VGA_R_O : std_logic_vector(7 downto 0);
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signal CON_VGA_G_O : std_logic_vector(7 downto 0);
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signal CON_VGA_B_O : std_logic_vector(7 downto 0);
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signal CON_AUDIO_L_O : std_logic;
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signal CON_AUDIO_R_O : std_logic;
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signal CON_IOCTL_DOWNLOAD : std_logic;
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signal CON_IOCTL_UPLOAD : std_logic;
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signal CON_IOCTL_CLK : std_logic;
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signal CON_IOCTL_WR : std_logic;
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signal CON_IOCTL_RD : std_logic;
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signal CON_IOCTL_ADDR : std_logic_vector(24 downto 0);
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signal CON_IOCTL_DOUT : std_logic_vector(31 downto 0);
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signal CON_IOCTL_DIN : std_logic_vector(31 downto 0);
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--
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-- IO Processor Signals.
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--
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signal IOP_IOCTL_DOWNLOAD : std_logic;
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signal IOP_IOCTL_UPLOAD : std_logic;
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signal IOP_IOCTL_CLK : std_logic;
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signal IOP_IOCTL_WR : std_logic;
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signal IOP_IOCTL_RD : std_logic;
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signal IOP_IOCTL_ADDR : std_logic_vector(24 downto 0);
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signal IOP_IOCTL_DOUT : std_logic_vector(31 downto 0);
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signal IOP_IOCTL_DIN : std_logic_vector(31 downto 0);
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signal IOP_IOCTL_SENSE : std_logic;
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signal IOP_IOCTL_SELECT : std_logic;
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--
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--
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--
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signal CON_UART_TX : std_logic;
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signal CON_UART_RX : std_logic;
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signal CON_SPI_SCLK : std_logic;
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signal CON_SPI_MOSI : std_logic;
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signal CON_SPI_MISO : std_logic;
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signal CON_SPI_CS : std_logic_vector(7 downto 0);
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--
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-- Components
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--
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component sharpmz
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port (
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-------------------- Clock Input ----------------------------
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CLKMASTER : in std_logic; -- Master Clock(50MHz)
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CLKSYS : out std_logic; -- System clock.
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CLKVID : out std_logic; -- Pixel base clock of video.
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CLKIOP : out std_logic; -- IO processor clock.
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-------------------- Reset ----------------------------
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COLD_RESET : in std_logic;
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WARM_RESET : in std_logic;
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-------------------- main_leds ----------------------------
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MAIN_LEDS : out std_logic_vector(7 downto 0); -- main_leds Green[7:0]
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-------------------- PS2 ----------------------------
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PS2_KEY : in std_logic_vector(10 downto 0); -- PS2 Key data.
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-------------------- VGA ----------------------------
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VGA_HB_O : out std_logic; -- VGA Horizontal Blank
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VGA_VB_O : out std_logic; -- VGA Vertical Blank
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VGA_HS_O : out std_logic; -- VGA H_SYNC
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VGA_VS_O : out std_logic; -- VGA V_SYNC
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VGA_R_O : out std_logic_vector(7 downto 0); -- VGA Red[3:0], [7:4] = 0
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VGA_G_O : out std_logic_vector(7 downto 0); -- VGA Green[3:0]
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VGA_B_O : out std_logic_vector(7 downto 0); -- VGA Blue[3:0]
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-------------------- AUDIO ------------------------------
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AUDIO_L_O : out std_logic;
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AUDIO_R_O : out std_logic;
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-------------------- HPS Interface ------------------------------
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IOCTL_DOWNLOAD : in std_logic; -- Downloading to FPGA.
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IOCTL_UPLOAD : in std_logic; -- Uploading from FPGA.
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IOCTL_CLK : in std_logic; -- I/O Clock.
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IOCTL_WR : in std_logic; -- Write Enable to FPGA.
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IOCTL_RD : in std_logic; -- Read Enable from FPGA.
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IOCTL_ADDR : in std_logic_vector(24 downto 0); -- Address in FPGA to write into.
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IOCTL_DOUT : in std_logic_vector(31 downto 0); -- Data to be written into FPGA.
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IOCTL_DIN : out std_logic_vector(31 downto 0) -- Data to be read into HPS.
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);
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end component;
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component STORM_SoC
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port (
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-- Global Control --
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CLK_I : in std_logic;
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RST_I : in std_logic;
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-- General purpose (debug) UART --
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UART0_RXD_I : in std_logic;
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UART0_TXD_O : out std_logic;
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-- System Control --
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START_I : in std_logic; -- low active
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BOOT_CONFIG_I : in std_logic_vector(03 downto 0); -- low active
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LED_BAR_O : out std_logic_vector(07 downto 0);
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-- GP Input Pins --
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GP_INPUT_I : in std_logic_vector(07 downto 0);
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-- GP Output Pins --
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GP_OUTPUT_O : out std_logic_vector(07 downto 0);
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-- I²C Port --
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I2C_SCL_IO : inout std_logic;
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I2C_SDA_IO : inout std_logic;
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-- SPI Port 0 [3 devices] --
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SPI_P0_CLK_O : out std_logic;
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SPI_P0_MISO_I : in std_logic;
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SPI_P0_MOSI_O : out std_logic;
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SPI_P0_CS_O : out std_logic_vector(02 downto 0);
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-- SPI Port 1 [3 devices] --
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SPI_P1_CLK_O : out std_logic;
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SPI_P1_MISO_I : in std_logic;
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SPI_P1_MOSI_O : out std_logic;
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SPI_P1_CS_O : out std_logic_vector(02 downto 0);
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-- SPI Port 2 [2 devices] --
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SPI_P2_CLK_O : out std_logic;
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SPI_P2_MISO_I : in std_logic;
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SPI_P2_MOSI_O : out std_logic;
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SPI_P2_CS_O : out std_logic_vector(01 downto 0);
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-- PWM Port 0 --
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-- PWM0_PORT_O : out std_logic_vector(07 downto 0)
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-- IOCTL Bus --
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IOCTL_DOWNLOAD : out std_logic; -- Downloading to FPGA.
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IOCTL_UPLOAD : out std_logic; -- Uploading from FPGA.
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IOCTL_CLK : out std_logic; -- I/O Clock.
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IOCTL_WR : out std_logic; -- Write Enable to FPGA.
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IOCTL_RD : out std_logic; -- Read Enable from FPGA.
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IOCTL_SENSE : in std_logic; -- Sense to see if HPS accessing ioctl bus.
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IOCTL_SELECT : out std_logic; -- Enable IOP control over ioctl bus.
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IOCTL_ADDR : out std_logic_vector(24 downto 0); -- Address in FPGA to write into.
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IOCTL_DOUT : out std_logic_vector(31 downto 0); -- Data to be written into FPGA.
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IOCTL_DIN : in std_logic_vector(31 downto 0) -- Data to be read into HPS.
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-- -- SDRAM Interface --
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-- SDRAM_CLK_O : out std_logic;
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-- SDRAM_CSN_O : out std_logic;
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-- SDRAM_CKE_O : out std_logic;
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-- SDRAM_RASN_O : out std_logic;
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-- SDRAM_CASN_O : out std_logic;
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-- SDRAM_WEN_O : out std_logic;
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-- SDRAM_DQM_O : out std_logic_vector(01 downto 0);
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-- SDRAM_BA_O : out std_logic_vector(01 downto 0);
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-- SDRAM_ADR_O : out std_logic_vector(11 downto 0);
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-- SDRAM_DAT_IO : inout std_logic_vector(15 downto 0)
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);
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end component;
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component neo430
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generic (
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-- general configuration --
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CLOCK_SPEED : natural := 100000000; -- main clock in Hz
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IMEM_SIZE : natural := 4*1024; -- internal IMEM size in bytes, max 48kB (default=4kB)
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DMEM_SIZE : natural := 2*1024; -- internal DMEM size in bytes, max 12kB (default=2kB)
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-- additional configuration --
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USER_CODE : std_logic_vector(15 downto 0) := x"0000"; -- custom user code
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-- module configuration --
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DADD_USE : boolean := true; -- implement DADD instruction? (default=true)
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MULDIV_USE : boolean := true; -- implement multiplier/divider unit? (default=true)
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WB32_USE : boolean := false;-- implement WB32 unit? (default=true)
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WDT_USE : boolean := true; -- implement WDT? (default=true)
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GPIO_USE : boolean := true; -- implement GPIO unit? (default=true)
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TIMER_USE : boolean := true; -- implement timer? (default=true)
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UART_USE : boolean := true; -- implement UART? (default=true)
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CRC_USE : boolean := true; -- implement CRC unit? (default=true)
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CFU_USE : boolean := true; -- implement custom functions unit? (default=false)
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PWM_USE : boolean := true; -- implement PWM controller?
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TWI_USE : boolean := true; -- implement two wire serial interface? (default=true)
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SPI_USE : boolean := true; -- implement SPI? (default=true)
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-- boot configuration --
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BOOTLD_USE : boolean := true; -- implement and use bootloader? (default=true)
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IMEM_AS_ROM : boolean := false -- implement IMEM as read-only memory? (default=false)
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);
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port (
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-- global control --
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clk_i : in std_logic; -- global clock, rising edge
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rst_i : in std_logic; -- global reset, async, low-active
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-- gpio --
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gpio_o : out std_logic_vector(15 downto 0); -- parallel output
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gpio_i : in std_logic_vector(15 downto 0); -- parallel input
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-- pwm channels --
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pwm_o : out std_logic_vector(02 downto 0); -- pwm channels
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-- serial com --
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uart_txd_o : out std_logic; -- UART send data
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uart_rxd_i : in std_logic; -- UART receive data
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spi_sclk_o : out std_logic; -- serial clock line
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spi_mosi_o : out std_logic; -- serial data line out
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spi_miso_i : in std_logic; -- serial data line in
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spi_cs_o : out std_logic_vector(07 downto 0); -- SPI CS 0..7
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twi_sda_io : inout std_logic; -- twi serial data line
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twi_scl_io : inout std_logic; -- twi serial clock line
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-- IOCTL Bus --
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ioctl_download : out std_logic; -- Downloading to FPGA.
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ioctl_upload : out std_logic; -- Uploading from FPGA.
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ioctl_clk : out std_logic; -- I/O Clock.
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ioctl_wr : out std_logic; -- Write Enable to FPGA.
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ioctl_rd : out std_logic; -- Read Enable from FPGA.
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ioctl_sense : in std_logic; -- Sense to see if HPS accessing ioctl bus.
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ioctl_select : out std_logic; -- Enable CFU control over ioctl bus.
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ioctl_addr : out std_logic_vector(24 downto 0); -- Address in FPGA to write into.
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ioctl_dout : out std_logic_vector(31 downto 0); -- Data to be written into FPGA.
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ioctl_din : in std_logic_vector(31 downto 0); -- Data to be read into HPS.
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-- 32-bit wishbone interface --
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wb_adr_o : out std_logic_vector(31 downto 0); -- address
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wb_dat_i : in std_logic_vector(31 downto 0); -- read data
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wb_dat_o : out std_logic_vector(31 downto 0); -- write data
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wb_we_o : out std_logic; -- read/write
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wb_sel_o : out std_logic_vector(03 downto 0); -- byte enable
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wb_stb_o : out std_logic; -- strobe
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wb_cyc_o : out std_logic; -- valid cycle
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wb_ack_i : in std_logic; -- transfer acknowledge
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-- interrupts --
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irq_i : in std_logic; -- external interrupt request line
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irq_ack_o : out std_logic -- external interrupt request acknowledge
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);
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end component;
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begin
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--
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-- Instantiation
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--
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SHARPMZ_0 : sharpmz
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port map (
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-------------------- Clock Input ----------------------------
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CLKMASTER => CON_CLKMASTER, -- Master Clock(50MHz)
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CLKSYS => CON_CLKSYS, -- System clock.
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CLKVID => CON_CLKVID, -- Pixel base clock of video.
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CLKIOP => CON_CLKIOP, -- IO Processor Clock.
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-------------------- ----------------------------
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COLD_RESET => CON_COLD_RESET,
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WARM_RESET => CON_WARM_RESET,
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-------------------- ----------------------------
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MAIN_LEDS => CON_MAIN_LEDS, -- main_leds Green[7:0]
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-------------------- ----------------------------
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PS2_KEY => CON_PS2_KEY, -- PS2 Key data.
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-------------------- ----------------------------
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VGA_HB_O => CON_VGA_HB_O, -- VGA Horizontal Blank
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VGA_VB_O => CON_VGA_VB_O, -- VGA Vertical Blank
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VGA_HS_O => CON_VGA_HS_O, -- VGA H_SYNC
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VGA_VS_O => CON_VGA_VS_O, -- VGA V_SYNC
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VGA_R_O => CON_VGA_R_O, -- VGA Red[3:0], [7:4] = 0
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VGA_G_O => CON_VGA_G_O, -- VGA Green[3:0]
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VGA_B_O => CON_VGA_B_O, -- VGA Blue[3:0]
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-------------------- ------------------------------
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AUDIO_L_O => CON_AUDIO_L_O,
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AUDIO_R_O => CON_AUDIO_R_O,
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-------------------- ------------------------------
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IOCTL_DOWNLOAD => CON_IOCTL_DOWNLOAD, -- Downloading to FPGA.
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IOCTL_UPLOAD => CON_IOCTL_UPLOAD, -- Uploading from FPGA.
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IOCTL_CLK => CON_IOCTL_CLK, -- I/O Clock.
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IOCTL_WR => CON_IOCTL_WR, -- Write Enable to FPGA.
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IOCTL_RD => CON_IOCTL_RD, -- Read Enable from FPGA.
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IOCTL_ADDR => CON_IOCTL_ADDR, -- Address in FPGA to write into.
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IOCTL_DOUT => CON_IOCTL_DOUT, -- Data to be written into FPGA.
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IOCTL_DIN => CON_IOCTL_DIN -- Data to be read into HPS.
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);
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-- If enabled, instantiate the local STORM IO processor to provide IO and user interface services.
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--
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STORM_ENABLED: if STORM_ENABLE = 1 generate
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STORM_0: STORM_SoC
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port map (
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-- Global Control --
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CLK_I => CON_CLKIOP, -- global clock, rising edge
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RST_I => (CON_COLD_RESET or CON_WARM_RESET), -- global reset, async
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-- General purpose (debug) UART --
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UART0_RXD_I => CON_UART_RX,
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UART0_TXD_O => CON_UART_TX,
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-- System Control --
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START_I => '1',
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BOOT_CONFIG_I => "0000",
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LED_BAR_O => open,
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-- GP Input Pins --
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GP_INPUT_I => x"FF",
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-- GP Output Pins --
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GP_OUTPUT_O => open,
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-- I²C Port --
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I2C_SCL_IO => open,
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I2C_SDA_IO => open,
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-- SPI Port 0 [3 devices] --
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SPI_P0_CLK_O => CON_SPI_SCLK,
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SPI_P0_MISO_I => CON_SPI_MISO,
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SPI_P0_MOSI_O => CON_SPI_MOSI,
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SPI_P0_CS_O => CON_SPI_CS(2 downto 0),
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-- SPI Port 1 [3 devices] --
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SPI_P1_CLK_O => open,
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SPI_P1_MISO_I => '0',
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SPI_P1_MOSI_O => open,
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SPI_P1_CS_O => open,
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-- SPI Port 2 [2 devices] --
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SPI_P2_CLK_O => open,
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SPI_P2_MISO_I => '0',
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SPI_P2_MOSI_O => open,
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SPI_P2_CS_O => open,
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-- PWM Port 0 --
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-- PWM0_PORT_O => open
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-- IOCTL Bus --
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IOCTL_DOWNLOAD => IOP_IOCTL_DOWNLOAD, -- Downloading to FPGA.
|
|
IOCTL_UPLOAD => IOP_IOCTL_UPLOAD, -- Uploading from FPGA.
|
|
IOCTL_CLK => IOP_IOCTL_CLK, -- I/O Clock.
|
|
IOCTL_WR => IOP_IOCTL_WR, -- Write Enable to FPGA.
|
|
IOCTL_RD => IOP_IOCTL_RD, -- Read Enable from FPGA.
|
|
IOCTL_SENSE => IOP_IOCTL_SENSE, -- Sense to see if HPS accessing ioctl bus.
|
|
IOCTL_SELECT => IOP_IOCTL_SELECT, -- Enable IOP control over ioctl bus.
|
|
IOCTL_ADDR => IOP_IOCTL_ADDR, -- Address in FPGA to write into.
|
|
IOCTL_DOUT => IOP_IOCTL_DOUT, -- Data to be written into FPGA.
|
|
IOCTL_DIN => IOP_IOCTL_DIN -- Data to be read into HPS.
|
|
|
|
-- -- SDRAM Interface --
|
|
-- SDRAM_CLK_O => open,
|
|
-- SDRAM_CSN_O => open,
|
|
-- SDRAM_CKE_O => open,
|
|
-- SDRAM_RASN_O => open,
|
|
-- SDRAM_CASN_O => open,
|
|
-- SDRAM_WEN_O => open,
|
|
-- SDRAM_DQM_O => open,
|
|
-- SDRAM_BA_O => open,
|
|
-- SDRAM_ADR_O => open,
|
|
-- SDRAM_DAT_IO => open
|
|
);
|
|
end generate;
|
|
|
|
-- If enabled, instantiate the local IO processor to provide IO and user interface services.
|
|
--
|
|
NEO430_ENABLED: if NEO_ENABLE = 1 generate
|
|
NEO430_0 : neo430
|
|
generic map (
|
|
-- general configuration --
|
|
CLOCK_SPEED => 64000000, -- main clock in Hz
|
|
IMEM_SIZE => 48*1024, -- internal IMEM size in bytes, max 48kB (default=4kB)
|
|
DMEM_SIZE => 12*1024, -- internal DMEM size in bytes, max 12kB (default=2kB)
|
|
-- additional configuration --
|
|
USER_CODE => x"0000", -- custom user code
|
|
-- module configuration --
|
|
DADD_USE => true, -- implement DADD instruction? (default=true)
|
|
MULDIV_USE => true, -- implement multiplier/divider unit? (default=true)
|
|
WB32_USE => false, -- implement WB32 unit? (default=true)
|
|
WDT_USE => true, -- implement WDT? (default=true)
|
|
GPIO_USE => true, -- implement GPIO unit? (default=true)
|
|
TIMER_USE => true, -- implement timer? (default=true)
|
|
UART_USE => true, -- implement UART? (default=true)
|
|
CRC_USE => false, -- implement CRC unit? (default=true)
|
|
CFU_USE => false, -- implement custom functions unit? (default=false)
|
|
PWM_USE => true, -- implement PWM controller?
|
|
TWI_USE => false, -- implement two wire serial interface? (default=true)
|
|
SPI_USE => true, -- implement SPI? (default=true)
|
|
-- boot configuration --
|
|
BOOTLD_USE => true, -- implement and use bootloader? (default=true)
|
|
IMEM_AS_ROM => false -- implement IMEM as read-only memory? (default=false)
|
|
)
|
|
port map (
|
|
-- global control --
|
|
clk_i => CON_CLKIOP, -- global clock, rising edge
|
|
rst_i => not (CON_COLD_RESET or CON_WARM_RESET), -- global reset, async
|
|
-- gpio --
|
|
gpio_o => open, -- parallel output
|
|
gpio_i => X"0000", -- parallel input
|
|
-- pwm channels --
|
|
pwm_o => open, -- pwm channels
|
|
-- serial com --
|
|
uart_txd_o => CON_UART_TX, -- UART send data
|
|
uart_rxd_i => CON_UART_RX, -- UART receive data
|
|
spi_sclk_o => CON_SPI_SCLK, -- serial clock line
|
|
spi_mosi_o => CON_SPI_MOSI, -- serial data line out
|
|
spi_miso_i => CON_SPI_MISO, -- serial data line in
|
|
spi_cs_o => CON_SPI_CS, -- SPI CS 0..7
|
|
twi_sda_io => open, -- twi serial data line
|
|
twi_scl_io => open, -- twi serial clock line
|
|
-- IOCTL Bus --
|
|
ioctl_download => IOP_IOCTL_DOWNLOAD, -- Downloading to FPGA.
|
|
ioctl_upload => IOP_IOCTL_UPLOAD, -- Uploading from FPGA.
|
|
ioctl_clk => IOP_IOCTL_CLK, -- I/O Clock.
|
|
ioctl_wr => IOP_IOCTL_WR, -- Write Enable to FPGA.
|
|
ioctl_rd => IOP_IOCTL_RD, -- Read Enable from FPGA.
|
|
ioctl_sense => IOP_IOCTL_SENSE, -- Sense to see if HPS accessing ioctl bus.
|
|
ioctl_select => IOP_IOCTL_SELECT, -- Enable CFU control over ioctl bus.
|
|
ioctl_addr => IOP_IOCTL_ADDR, -- Address in FPGA to write into.
|
|
ioctl_dout => IOP_IOCTL_DOUT, -- Data to be written into FPGA.
|
|
ioctl_din => IOP_IOCTL_DIN, -- Data to be read into HPS.
|
|
-- 32-bit wishbone interface --
|
|
wb_adr_o => open, -- address
|
|
wb_dat_i => (others => '0'), -- read data
|
|
wb_dat_o => open, -- write data
|
|
wb_we_o => open, -- read/write
|
|
wb_sel_o => open, -- byte enable
|
|
wb_stb_o => open, -- strobe
|
|
wb_cyc_o => open, -- valid cycle
|
|
wb_ack_i => '0', -- transfer acknowledge
|
|
-- interrupts --
|
|
irq_i => '0', -- external interrupt request line
|
|
irq_ack_o => open -- external interrupt request acknowledge
|
|
);
|
|
end generate;
|
|
|
|
-- If the IO Processor is disabled, set the signals to inactive.
|
|
--
|
|
IOP_DISABLED: if NEO_ENABLE = 0 and STORM_ENABLE = 0 generate
|
|
IOP_IOCTL_DOWNLOAD <= '0';
|
|
IOP_IOCTL_UPLOAD <= '0';
|
|
IOP_IOCTL_CLK <= '0';
|
|
IOP_IOCTL_WR <= '0';
|
|
IOP_IOCTL_RD <= '0';
|
|
IOP_IOCTL_ADDR <= (others => '0');
|
|
IOP_IOCTL_DOUT <= (others => '0');
|
|
--IOP_IOCTL_DIN => open;
|
|
--IOP_IOCTL_SENSE => open;
|
|
IOP_IOCTL_SELECT <= '0';
|
|
end generate;
|
|
|
|
-- Assign signals from the emu onto local wires.
|
|
--
|
|
CON_CLKMASTER <= clkmaster;
|
|
clksys <= CON_CLKSYS;
|
|
clkvid <= CON_CLKVID;
|
|
CON_COLD_RESET <= cold_reset;
|
|
CON_WARM_RESET <= warm_reset;
|
|
main_leds <= CON_MAIN_LEDS;
|
|
CON_PS2_KEY <= ps2_key;
|
|
vga_hb_o <= CON_VGA_HB_O;
|
|
vga_vb_o <= CON_VGA_VB_O;
|
|
vga_hs_o <= CON_VGA_HS_O;
|
|
vga_vs_o <= CON_VGA_VS_O;
|
|
vga_r_o <= CON_VGA_R_O;
|
|
vga_g_o <= CON_VGA_G_O;
|
|
vga_b_o <= CON_VGA_B_O;
|
|
audio_l_o <= CON_AUDIO_L_O;
|
|
audio_r_o <= CON_AUDIO_R_O;
|
|
|
|
uart_tx <= CON_UART_TX;
|
|
CON_UART_RX <= uart_rx;
|
|
sd_sck <= CON_SPI_SCLK;
|
|
sd_mosi <= CON_SPI_MOSI;
|
|
CON_SPI_MISO <= sd_miso;
|
|
sd_cs <= CON_SPI_CS(0);
|
|
--
|
|
-- Multiplexer, default IO control to the HPS unless the IOP is enabled and selects.
|
|
-- The IOP first senses to ensure there is no activity on the bus, then takes control
|
|
--
|
|
CON_IOCTL_DOWNLOAD <= ioctl_download when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_DOWNLOAD;
|
|
CON_IOCTL_UPLOAD <= ioctl_upload when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_UPLOAD;
|
|
CON_IOCTL_CLK <= ioctl_clk when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_CLK;
|
|
CON_IOCTL_WR <= ioctl_wr when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_WR;
|
|
CON_IOCTL_RD <= ioctl_rd when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_RD;
|
|
CON_IOCTL_ADDR <= ioctl_addr when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_ADDR;
|
|
CON_IOCTL_DOUT <= X"0000" & ioctl_dout when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
IOP_IOCTL_DOUT;
|
|
ioctl_din <= CON_IOCTL_DIN(15 downto 0) when IOP_IOCTL_SELECT = '0'
|
|
else
|
|
(others => '0');
|
|
IOP_IOCTL_DIN <= CON_IOCTL_DIN when IOP_IOCTL_SELECT = '1'
|
|
else
|
|
(others => '0');
|
|
IOP_IOCTL_SENSE <= ioctl_download or ioctl_upload or ioctl_wr or ioctl_rd;
|
|
|
|
end rtl;
|