zcy
/
pluto_hdl_adi
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
pluto_hdl_adi/library/axi_spdif_rx/axi_spdif_rx.vhd

433 lines
15 KiB
VHDL
Raw Blame History

-- ***************************************************************************
-- ***************************************************************************
-- Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved.
--
-- In this HDL repository, there are many different and unique modules, consisting
-- of various HDL (Verilog or VHDL) components. The individual modules are
-- developed independently, and may be accompanied by separate and unique license
-- terms.
--
-- The user should read each of these license terms, and understand the
-- freedoms and responsabilities that he or she has by using this source/core.
--
-- This core is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-- A PARTICULAR PURPOSE.
--
-- Redistribution and use of source or resulting binaries, with or without modification
-- of this file, are permitted under one of the following two license terms:
--
-- 1. The GNU General Public License version 2 as published by the
-- Free Software Foundation, which can be found in the top level directory
-- of this repository (LICENSE_GPL2), and also online at:
-- <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
--
-- OR
--
-- 2. An ADI specific BSD license, which can be found in the top level directory
-- of this repository (LICENSE_ADIBSD), and also on-line at:
-- https://github.com/analogdevicesinc/hdl/blob/master/LICENSE_ADIBSD
-- This will allow to generate bit files and not release the source code,
-- as long as it attaches to an ADI device.
--
-- ***************************************************************************
-- ***************************************************************************
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
use ieee.numeric_std.all;
library work;
use work.rx_package.all;
use work.axi_ctrlif;
use work.axi_streaming_dma_rx_fifo;
use work.pl330_dma_fifo;
entity axi_spdif_rx is
generic
(
C_S_AXI_DATA_WIDTH : integer := 32;
C_S_AXI_ADDR_WIDTH : integer := 32;
C_DMA_TYPE : integer := 0
);
port
(
--SPDIF ports
rx_int_o : out std_logic;
spdif_rx_i : in std_logic;
spdif_rx_i_dbg : out std_logic;
--AXI Lite inter face
s_axi_aclk : in std_logic;
s_axi_aresetn : in std_logic;
s_axi_awaddr : in std_logic_vector(C_S_AXI_ADDR_WIDTH-1 downto 0);
s_axi_awvalid : in std_logic;
s_axi_wdata : in std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
s_axi_wstrb : in std_logic_vector((C_S_AXI_DATA_WIDTH/8)-1 downto 0);
s_axi_wvalid : in std_logic;
s_axi_bready : in std_logic;
s_axi_araddr : in std_logic_vector(C_S_AXI_ADDR_WIDTH-1 downto 0);
s_axi_arvalid : in std_logic;
s_axi_rready : in std_logic;
s_axi_arready : out std_logic;
s_axi_rdata : out std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
s_axi_rresp : out std_logic_vector(1 downto 0);
s_axi_rvalid : out std_logic;
s_axi_wready : out std_logic;
s_axi_bresp : out std_logic_vector(1 downto 0);
s_axi_bvalid : out std_logic;
s_axi_awready : out std_logic;
s_axi_awprot : in std_logic_vector(2 downto 0);
s_axi_arprot : in std_logic_vector(2 downto 0);
--AXI STREAM interface
m_axis_aclk : in std_logic;
m_axis_tready : in std_logic;
m_axis_tdata : out std_logic_vector(31 downto 0);
m_axis_tlast : out std_logic;
m_axis_tvalid : out std_logic;
m_axis_tkeep : out std_logic_vector(3 downto 0);
--PL330 DMA interface
dma_req_aclk : in std_logic;
dma_req_rstn : in std_logic;
dma_req_davalid : in std_logic;
dma_req_datype : in std_logic_vector(1 downto 0);
dma_req_daready : out std_logic;
dma_req_drvalid : out std_logic;
dma_req_drtype : out std_logic_vector(1 downto 0);
dma_req_drlast : out std_logic;
dma_req_drready : in std_logic
);
end entity axi_spdif_rx;
------------------------------------------------------------------------------
-- Architecture section
------------------------------------------------------------------------------
architecture IMP of axi_spdif_rx is
signal wr_data : std_logic_vector(31 downto 0);
signal rd_data : std_logic_vector(31 downto 0);
signal wr_addr : integer range 0 to 3;
signal rd_addr : integer range 0 to 3;
signal wr_stb : std_logic;
signal rd_ack : std_logic;
signal version_reg : std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
signal control_reg : std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
signal chstatus_reg : std_logic_vector(C_S_AXI_DATA_WIDTH-1 downto 0);
signal sampled_data : std_logic_vector(31 downto 0);
signal sample_ack : std_logic;
signal sample_din : std_logic_vector(31 downto 0);
signal sample_wr : std_logic;
signal conf_rxen : std_logic;
signal conf_sample : std_logic;
signal conf_chas : std_logic;
signal conf_valid : std_logic;
signal conf_blken : std_logic;
signal conf_valen : std_logic;
signal conf_useren : std_logic;
signal conf_staten : std_logic;
signal conf_paren : std_logic;
signal config_rd : std_logic;
signal config_wr : std_logic;
signal conf_mode : std_logic_vector(3 downto 0);
signal conf_bits : std_logic_vector(C_S_AXI_DATA_WIDTH - 1 downto 0);
signal conf_dout : std_logic_vector(C_S_AXI_DATA_WIDTH - 1 downto 0);
signal fifo_data_out : std_logic_vector(31 downto 0);
signal fifo_data_ack : std_logic;
signal fifo_reset : std_logic;
signal tx_fifo_stb : std_logic;
signal enable : boolean;
signal lock : std_logic;
signal rx_data : std_logic;
signal rx_data_en : std_logic;
signal rx_block_start : std_logic;
signal rx_channel_a : std_logic;
signal rx_error : std_logic;
signal lock_evt : std_logic;
signal ud_a_en : std_logic;
signal ud_b_en : std_logic;
signal cs_a_en : std_logic;
signal cs_b_en : std_logic;
signal rx_frame_start : std_logic;
signal istat_lsbf : std_logic;
signal istat_hsbf : std_logic;
signal istat_paritya : std_logic;
signal istat_parityb : std_logic;
signal sbuf_wr_adr : std_logic_vector(C_S_AXI_ADDR_WIDTH - 2 downto 0);
begin
-------------------------------------------------------------------------------
-- Version Register
-------------------------------------------------------------------------------
version_reg(31 downto 20) <= (others => '0');
version_reg(19 downto 16) <= "0001";
version_reg(15 downto 12) <= (others => '0');
version_reg(11 downto 5) <= std_logic_vector(to_unsigned(C_S_AXI_ADDR_WIDTH,7));
version_reg(4) <= '1';
version_reg(3 downto 0) <= "0001";
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Control Register
--------------------------------------------------------------------------------
conf_mode(3 downto 0) <= control_reg(23 downto 20);
conf_paren <= control_reg(19);
conf_staten <= control_reg(18);
conf_useren <= control_reg(17);
conf_valen <= control_reg(16);
conf_blken <= control_reg(5);
conf_valid <= control_reg(4);
conf_chas <= control_reg(3);
conf_sample <= control_reg(1);
conf_rxen <= control_reg(0);
--------------------------------------------------------------------------------
fifo_reset <= not conf_sample;
enable <= conf_sample = '1';
streaming_dma_gen: if C_DMA_TYPE = 0 generate
fifo: entity axi_streaming_dma_rx_fifo
generic map (
RAM_ADDR_WIDTH => 3,
FIFO_DWIDTH => 32
)
port map (
clk => s_axi_aclk,
resetn => s_axi_aresetn,
fifo_reset => fifo_reset,
enable => enable,
period_len => 11,
m_axis_aclk => m_axis_aclk,
m_axis_tready => m_axis_tready,
m_axis_tdata => m_axis_tdata,
m_axis_tlast => m_axis_tlast,
m_axis_tvalid => m_axis_tvalid,
m_axis_tkeep => m_axis_tkeep,
-- Write port
in_stb => sample_wr,
in_ack => sample_ack,
in_data => sample_din
);
end generate;
no_streaming_dma_gen: if C_DMA_TYPE /= 0 generate
m_axis_tvalid <= '0';
m_axis_tlast <= '0';
m_axis_tkeep <= "0000";
end generate;
pl330_dma_gen: if C_DMA_TYPE = 1 generate
tx_fifo_stb <= '1' when wr_addr = 3 and wr_stb = '1' else '0';
fifo: entity pl330_dma_fifo
generic map(
RAM_ADDR_WIDTH => 3,
FIFO_DWIDTH => 32,
FIFO_DIRECTION => 0
)
port map (
clk => s_axi_aclk,
resetn => s_axi_aresetn,
fifo_reset => fifo_reset,
enable => enable,
in_data => sample_din,
in_stb => sample_wr,
out_ack => tx_fifo_stb,
out_data => sampled_data,
dclk => dma_req_aclk,
dresetn => dma_req_rstn,
davalid => dma_req_davalid,
daready => dma_req_daready,
datype => dma_req_datype,
drvalid => dma_req_drvalid,
drready => dma_req_drready,
drtype => dma_req_drtype,
drlast => dma_req_drlast
);
end generate;
no_pl330_dma_gen: if C_DMA_TYPE /= 1 generate
dma_req_daready <= '0';
dma_req_drvalid <= '0';
dma_req_drtype <= (others => '0');
dma_req_drlast <= '0';
end generate;
--------------------------------------------------------------------------------
-- Status Register
--------------------------------------------------------------------------------
STAT: rx_status_reg
generic map
(
DATA_WIDTH => C_S_AXI_DATA_WIDTH
)
port map
(
up_clk => s_axi_aclk,
status_rd => rd_ack,
lock => lock,
chas => conf_chas,
rx_block_start => rx_block_start,
ch_data => rx_data,
cs_a_en => cs_a_en,
cs_b_en => cs_b_en,
status_dout => chstatus_reg
);
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Phase decoder
--------------------------------------------------------------------------------
PDET: rx_phase_det
generic map
(
AXI_FREQ => 100 -- WishBone frequency in MHz
)
port map
(
up_clk => s_axi_aclk,
rxen => conf_rxen,
spdif => spdif_rx_i,
lock => lock,
lock_evt => lock_evt,
rx_data => rx_data,
rx_data_en => rx_data_en,
rx_block_start => rx_block_start,
rx_frame_start => rx_frame_start,
rx_channel_a => rx_channel_a,
rx_error => rx_error,
ud_a_en => ud_a_en,
ud_b_en => ud_b_en,
cs_a_en => cs_a_en,
cs_b_en => cs_b_en
);
spdif_rx_i_dbg <= spdif_rx_i;
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Rx Decoder
--------------------------------------------------------------------------------
FDEC: rx_decode
generic map
(
DATA_WIDTH => C_S_AXI_DATA_WIDTH,
ADDR_WIDTH => C_S_AXI_ADDR_WIDTH
)
port map
(
up_clk => s_axi_aclk,
conf_rxen => conf_rxen,
conf_sample => conf_sample,
conf_valid => conf_valid,
conf_mode => conf_mode,
conf_blken => conf_blken,
conf_valen => conf_valen,
conf_useren => conf_useren,
conf_staten => conf_staten,
conf_paren => conf_paren,
lock => lock,
rx_data => rx_data,
rx_data_en => rx_data_en,
rx_block_start => rx_block_start,
rx_frame_start => rx_frame_start,
rx_channel_a => rx_channel_a,
wr_en => sample_wr,
wr_addr => sbuf_wr_adr,
wr_data => sample_din,
stat_paritya => istat_paritya,
stat_parityb => istat_parityb,
stat_lsbf => istat_lsbf,
stat_hsbf => istat_hsbf
);
rx_int_o <= sample_wr;
ctrlif: entity axi_ctrlif
generic map (
C_S_AXI_ADDR_WIDTH => C_S_AXI_ADDR_WIDTH,
C_S_AXI_DATA_WIDTH => C_S_AXI_DATA_WIDTH,
C_NUM_REG => 4
)
port map(
s_axi_aclk => s_axi_aclk,
s_axi_aresetn => s_axi_aresetn,
s_axi_awaddr => s_axi_awaddr,
s_axi_awvalid => s_axi_awvalid,
s_axi_wdata => s_axi_wdata,
s_axi_wstrb => s_axi_wstrb,
s_axi_wvalid => s_axi_wvalid,
s_axi_bready => s_axi_bready,
s_axi_araddr => s_axi_araddr,
s_axi_arvalid => s_axi_arvalid,
s_axi_rready => s_axi_rready,
s_axi_arready => s_axi_arready,
s_axi_rdata => s_axi_rdata,
s_axi_rresp => s_axi_rresp,
s_axi_rvalid => s_axi_rvalid,
s_axi_wready => s_axi_wready,
s_axi_bresp => s_axi_bresp,
s_axi_bvalid => s_axi_bvalid,
s_axi_awready => s_axi_awready,
rd_addr => rd_addr,
rd_data => rd_data,
rd_ack => rd_ack,
rd_stb => '1',
wr_addr => wr_addr,
wr_data => wr_data,
wr_ack => '1',
wr_stb => wr_stb
);
process (s_axi_aclk)
begin
if rising_edge(s_axi_aclk) then
if s_axi_aresetn = '0' then
control_reg <= (others => '0');
else
if wr_stb = '1' then
case wr_addr is
when 1 => control_reg <= wr_data;
when others => null;
end case;
end if;
end if;
end if;
end process;
process (rd_addr, version_reg, control_reg, chstatus_reg, sampled_data)
begin
case rd_addr is
when 0 => rd_data <= version_reg;
when 1 => rd_data <= control_reg;
when 2 => rd_data <= chstatus_reg;
when 3 => rd_data <= sampled_data;
when others => rd_data <= (others => '0');
end case;
end process;
end IMP;
Reference in New Issue View Git Blame Copy Permalink