another question on opencore's I2C core controller

[daisyzari]

We would just want to ask the need of the hookup of the signals from the package to the signals of the interface.

This is the code

package I2C is
component simple_i2c is
port (
clk : in std_logic;
ena : in std_logic;
nReset : in std_logic;

clk_cnt : in unsigned(7 downto 0); -- 4x SCL

-- input signals
start,
stop,
read,
write,
ack_in : std_logic;
Din : in std_logic_vector(7 downto 0);

-- output signals
cmd_ack : out std_logic;
ack_out : out std_logic;
Dout : out std_logic_vector(7 downto 0);

-- i2c signals
SCL : inout std_logic;
SDA : inout std_logic
);
end component simple_i2c;
end package I2C;



--
--
-- State machine for reading data from Dallas 1621
--
-- Testsystem for i2c controller
--
--
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;

use work.i2c.all;

entity DS1621_interface is
port (
clk : in std_logic;
nReset : in std_logic;

Dout : out std_logic_vector(7 downto 0); -- data read from ds1621

error : out std_logic; -- no correct ack received

SCL : inout std_logic;
SDA : inout std_logic
);
end entity DS1621_interface;

architecture structural of DS1621_interface is
constant SLAVE_ADDR : std_logic_vector(6 downto 0) := "1001000";
constant CLK_CNT : unsigned(7 downto 0) := conv_unsigned(20, 8);

signal cmd_ack : std_logic;
signal D : std_logic_vector(7 downto 0);
signal lack, store_dout : std_logic;

signal start, read, write, ack, stop : std_logic;
signal i2c_dout : std_logic_vector(7 downto 0);

begin
-- hookup I2C controller
u1: simple_i2c port map (clk => clk, ena => '1', clk_cnt => clk_cnt, nReset => nReset,
read => read, write => write, start => start, stop => stop, ack_in => ack, cmd_ack => cmd_ack,
Din => D, Dout => i2c_dout, ack_out => lack, SCL => SCL, SDA => SDA);

I know this is sort of a beginners question and I think I can understand it a bit but we just need further explanations regarding the matter(or a professionals help regarding the matter.

Thank you:-D

 

[Sckoarn]

daisyzari,
It seems like every thing is connected correctly. Looks like you just have to drive the Dout pin with the data output from the i2c, add some logic for ack detection and the rest of the top level pins. The code is not complete, so I can not try compile and simulation.

Your question is not worded very well, it is hard to tell exactly what you want.

Sckoarn