Disabled external gits

cs473-es/lab3/hw/hdl/LCDController/LCDDriver_tb.vhd

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+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use ieee.math_real.all;
+
+
+entity LCDDriver_tb is
+end LCDDriver_tb;
+
+architecture test of LCDDriver_tb is
+    constant CLK_PERIOD : time := 20 ns;
+    constant N_LED_MAX : integer := 255;
+
+    signal clk   : std_logic := '0';
+    signal rst_n : std_logic := '1';
+
+    signal data_in      : std_logic_vector(15 downto 0) := (others=> '0');
+    signal empty_in     : std_logic := '1';
+    signal refresh_in   : std_logic := '0';
+
+    signal cmd_en_in    : std_logic := '0';
+    signal cmd_dcx_in   : std_logic := '0';
+    signal cmd_data_in  : std_logic_vector(7 downto 0) := (others => '0');
+
+    signal m_finished_in  : std_logic := '0';
+
+    signal data_out   : std_logic_vector(15 downto 0);
+    signal rd_n       : std_logic;
+    signal wr_n       : std_logic;
+    signal rs         : std_logic;
+    signal cs_n       : std_logic;
+
+    signal lcd_rdreq  : std_logic;
+    signal rdreq_cnt  : integer := 0;
+
+    signal busy : std_logic;
+
+begin
+    -- Instantiate DUT
+    dut : entity work.LCDDriver
+    generic map (
+        F_CLK => 50000000
+    )
+    port map(
+        clk             => clk,
+        rst_n           => rst_n,
+        data_in         => data_in,
+        empty_in        => empty_in,
+        refresh_in      => refresh_in,
+
+        cmd_en_in       => cmd_en_in,
+        cmd_dcx_in      => cmd_dcx_in,
+        cmd_data_in     => cmd_data_in,
+
+        m_finished_in   => m_finished_in,
+
+        data_out        => data_out,
+        rd_n            => rd_n,
+        wr_n            => wr_n,
+        rs              => rs,
+        cs_n            => cs_n,
+
+        lcd_rdreq       => lcd_rdreq,
+
+        busy            => busy
+    );
+
+    -- Clocking process
+    clk_generation : process
+    begin
+        clk <= not clk;
+        wait for CLK_PERIOD / 2;
+    end process;
+
+    process (lcd_rdreq) begin
+        if rising_edge(lcd_rdreq) then
+            if (rdreq_cnt = 0) then 
+                data_in <= "1111111111111111";
+            elsif (rdreq_cnt = 1) then
+                data_in <= "1111000000001111";
+            elsif (rdreq_cnt = 2) then
+                data_in <= "1111111100000000";
+            elsif (rdreq_cnt = 3) then
+                data_in <= "0000000011111111";
+            else 
+                data_in <= "0000000000000000";
+            end if;
+            rdreq_cnt <= rdreq_cnt + 1;
+        end if;
+    end process;
+
+    tb : process 
+        procedure wait_ready is
+            begin
+                if busy = '1' then
+                    wait until busy = '0';
+                end if;
+        end procedure wait_ready;
+
+        procedure finish is
+        begin
+            wait until falling_edge(clk);
+            wait_ready;
+            wait; 
+        end procedure finish ;
+
+    begin
+        -- Reset
+        rst_n <= '0';
+        wait for CLK_PERIOD * 2.5;
+        rst_n <= '1';
+        wait for CLK_PERIOD * 2;
+        wait_ready;
+
+        -- Test CMD
+        cmd_en_in <= '1';
+        cmd_dcx_in <= '1';
+        cmd_data_in <= "11010011";
+        wait for CLK_PERIOD * 2.5;
+        cmd_en_in <= '0';
+
+        wait_ready;
+
+        -- Test REFRESH
+        refresh_in <= '1';
+        wait for CLK_PERIOD * 2.5;
+        refresh_in <= '0';
+        wait for CLK_PERIOD * 4;
+        empty_in <= '0';
+        wait until rdreq_cnt = 4;
+        empty_in <= '1';
+        --m_finished_in   => m_finished_in,
+        wait_ready;
+
+        
+        -- Test finished
+        finish;
+
+    end process;
+
+end;