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LIBRARY IEEE;
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USE IEEE.std_logic_1164.ALL;
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USE IEEE.numeric_std.ALL;
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ENTITY MS_control IS
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PORT (
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clk : IN STD_LOGIC;
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rstn : IN STD_LOGIC;
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-- IN
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current_status_ms : IN STD_LOGIC_VECTOR(49 DOWNTO 0); -- TIME(47 .. 0) & Matrix_type(1..0)
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-- IN
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fifo_in_lock : OUT STD_LOGIC_VECTOR(4 DOWNTO 0);
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fifo_in_data : IN STD_LOGIC_VECTOR(32*5-1 DOWNTO 0);
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fifo_in_full : IN STD_LOGIC_VECTOR(4 DOWNTO 0);
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fifo_in_empty : IN STD_LOGIC_VECTOR(4 DOWNTO 0);
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fifo_in_ren : OUT STD_LOGIC_VECTOR(4 DOWNTO 0);
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fifo_in_reuse : OUT STD_LOGIC_VECTOR(4 DOWNTO 0);
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-- OUT
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fifo_out_data : OUT STD_LOGIC_VECTOR(32*2-1 DOWNTO 0);
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fifo_out_ren : IN STD_LOGIC_VECTOR(1 DOWNTO 0);
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fifo_out_empty : OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
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-- OUT
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current_status_component : OUT STD_LOGIC_VECTOR(53 DOWNTO 0); -- TIME(47 .. 0) &
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-- Matrix_type (1..0)
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-- ComponentType (3..0)
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correlation_start : OUT STD_LOGIC;
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correlation_auto : OUT STD_LOGIC; -- 1 => auto correlation / 0 => inter correlation
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correlation_done : IN STD_LOGIC
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);
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END MS_control;
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ARCHITECTURE beh OF MS_control IS
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TYPE fsm_control_MS IS (WAIT_DATA, CORRELATION_ONGOING);
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SIGNAL state : fsm_control_MS;
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SUBTYPE fifo_pointer IS INTEGER RANGE 0 TO 4;
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SIGNAL fifo_1 : fifo_pointer;
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SIGNAL fifo_2 : fifo_pointer;
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SIGNAL fifo_in_lock_s : STD_LOGIC_VECTOR(4 DOWNTO 0);
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SIGNAL fifo_in_reuse_s : STD_LOGIC_VECTOR(4 DOWNTO 0);
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BEGIN -- beh
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fifo_in_lock <= fifo_in_lock_s;
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fifo_in_reuse <= fifo_in_reuse_s;
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PROCESS (clk, rstn)
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BEGIN
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IF rstn = '0' THEN
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state <= WAIT_DATA;
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fifo_1 <= 0;
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fifo_2 <= 0;
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fifo_in_lock_s <= (OTHERS => '0');
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fifo_in_reuse_s <= (OTHERS => '0');
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correlation_start <= '0';
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correlation_auto <= '0';
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current_status_component <= (OTHERS => '0');
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ELSIF clk'event AND clk = '1' THEN
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CASE state IS
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WHEN WAIT_DATA =>
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fifo_in_reuse_s <= (OTHERS => '0');
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IF fifo_in_full(fifo_1) = '1' AND fifo_in_full(fifo_2) = '1' THEN
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fifo_in_lock_s(fifo_1) <= '1';
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fifo_in_lock_s(fifo_2) <= '1';
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correlation_start <= '1';
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IF fifo_1 = fifo_2 THEN
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correlation_auto <= '1';
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END IF;
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state <= CORRELATION_ONGOING;
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IF fifo_1 = 0 AND fifo_2 = 0 THEN
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current_status_component(53 DOWNTO 4) <= current_status_ms;
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END IF;
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CASE fifo_1 IS
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WHEN 0 => current_status_component(3 DOWNTO 0) <= STD_LOGIC_VECTOR(to_unsigned( fifo_2,4));
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WHEN 1 => current_status_component(3 DOWNTO 0) <= STD_LOGIC_VECTOR(to_unsigned(4+fifo_2,4));
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WHEN 2 => current_status_component(3 DOWNTO 0) <= STD_LOGIC_VECTOR(to_unsigned(7+fifo_2,4));
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WHEN 3 => current_status_component(3 DOWNTO 0) <= STD_LOGIC_VECTOR(to_unsigned(9+fifo_2,4));
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WHEN 4 => current_status_component(3 DOWNTO 0) <= STD_LOGIC_VECTOR(to_unsigned(14 ,4));
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WHEN OTHERS => NULL;
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END CASE;
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--current_status_component(3 DOWNTO 0) <= STD_LOGIC_VECTOR(to_unsigned(fifo_1*5+fifo_2,4));
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END IF;
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WHEN CORRELATION_ONGOING =>
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correlation_start <= '0';
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correlation_auto <= '0';
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IF correlation_done = '1' THEN
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state <= WAIT_DATA;
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IF fifo_2 = 4 THEN
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fifo_in_lock_s(fifo_1) <= '0';
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IF fifo_1 = 4 THEN
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fifo_1 <= 0;
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fifo_2 <= 0;
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ELSE
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fifo_in_reuse_s(fifo_2) <= '1';
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fifo_1 <= fifo_1 + 1;
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fifo_2 <= fifo_1 + 1;
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END IF;
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ELSE
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fifo_in_reuse_s(fifo_2) <= '1';
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fifo_in_reuse_s(fifo_1) <= '1';
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fifo_2 <= fifo_2 + 1;
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END IF;
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END IF;
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WHEN OTHERS => NULL;
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END CASE;
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END IF;
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END PROCESS;
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fifo_out_data(31 DOWNTO 0) <= fifo_in_data(32*1-1 DOWNTO 32*0) WHEN fifo_1 = 0 ELSE
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fifo_in_data(32*2-1 DOWNTO 32*1) WHEN fifo_1 = 1 ELSE
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fifo_in_data(32*3-1 DOWNTO 32*2) WHEN fifo_1 = 2 ELSE
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fifo_in_data(32*4-1 DOWNTO 32*3) WHEN fifo_1 = 3 ELSE
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fifo_in_data(32*5-1 DOWNTO 32*4);-- WHEN fifo_1 = 4
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fifo_out_data(63 DOWNTO 32) <= fifo_in_data(32*1-1 DOWNTO 32*0) WHEN fifo_2 = 0 ELSE
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fifo_in_data(32*2-1 DOWNTO 32*1) WHEN fifo_2 = 1 ELSE
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fifo_in_data(32*3-1 DOWNTO 32*2) WHEN fifo_2 = 2 ELSE
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fifo_in_data(32*4-1 DOWNTO 32*3) WHEN fifo_2 = 3 ELSE
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fifo_in_data(32*5-1 DOWNTO 32*4);-- WHEN fifo_2 = 4
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fifo_out_empty(0) <= fifo_in_empty(0) WHEN fifo_1 = 0 ELSE
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fifo_in_empty(1) WHEN fifo_1 = 1 ELSE
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fifo_in_empty(2) WHEN fifo_1 = 2 ELSE
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fifo_in_empty(3) WHEN fifo_1 = 3 ELSE
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fifo_in_empty(4);
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fifo_out_empty(1) <= fifo_in_empty(0) WHEN fifo_2 = 0 ELSE
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fifo_in_empty(1) WHEN fifo_2 = 1 ELSE
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fifo_in_empty(2) WHEN fifo_2 = 2 ELSE
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fifo_in_empty(3) WHEN fifo_2 = 3 ELSE
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fifo_in_empty(4);
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all_fifo: FOR I IN 0 TO 4 GENERATE
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fifo_in_ren(I) <= fifo_out_ren(0) WHEN fifo_1 = I ELSE
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fifo_out_ren(1) WHEN fifo_2 = I ELSE
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'1';
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END GENERATE all_fifo;
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END beh;
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