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-- Copyright (c) 2013 Nuand LLC
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.
library ieee ;
use ieee.std_logic_1164.all ;
use ieee.numeric_std.all ;
use ieee.math_real.all ;
use ieee.math_complex.all ;
entity lms6002d_model is
port (
-- LMS RX Interface
rx_clock : in std_logic ;
rx_clock_out : buffer std_logic ;
rx_data : buffer signed(11 downto 0) ;
rx_enable : in std_logic ;
rx_iq_select : buffer std_logic ;
-- LMS TX Interface
tx_clock : in std_logic ;
tx_data : in signed(11 downto 0) ;
tx_enable : in std_logic ;
tx_iq_select : in std_logic ;
-- LMS SPI Interface
sclk : in std_logic ;
sen : in std_logic ;
sdio : in std_logic ;
sdo : buffer std_logic ;
-- LMS Control Interface
pll_out : buffer std_logic ;
resetx : in std_logic
) ;
end entity ; -- lms6002d_model
architecture arch of lms6002d_model is
begin
pll_out <= '0' ;
-- Write transmit samples to a file or drop them on the floor
-- Read receive samples from a file or predetermined tone
rx_clock_out <= rx_clock ;
drive_rx_data : process( resetx, rx_clock )
begin
if( resetx = '0' ) then
rx_data <= (others =>'0') ;
rx_iq_select <= '0' ;
elsif( rising_edge(rx_clock) ) then
if( rx_enable = '1' ) then
rx_data <= rx_data + 1 ;
rx_iq_select <= not rx_iq_select ;
else
rx_data <= (others =>'0') ;
rx_iq_select <= '0' ;
end if ;
end if ;
end process ;
-- Keep track of the SPI register set
sdo <= '0' ;
end architecture ; -- arch
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