datain接单片机P1口，sele接单片机P2口低四位，en接P2.4。下载到板子上调试的时候，发现分配给连接单片机的引脚灯正常，分配给输出引脚的灯没有变化？怎么回事，求解？谢谢。


代码如下：
--接受命令模块实体
LIBRARY ieee; --打开IEEE库
USE ieee.std_logic_1164.ALL; --打开STD_LOGIC_1164包集
USE ieee.std_logic_unsigned.ALL; --打开STD_LOGIC_unsigned包集

ENtiTY Command_TxRx IS --定义实体
PORT (
        Datain51: IN STD_LOGIC_VECTOR(7 DOWNTO 0);
        en : IN STD_LOGIC;
        Sele: IN STD_LOGIC_VECTOR(3 DOWNTO 0);
        doutF: OUT STD_LOGIC_VECTOR(31 DOWNTO 0);
        doutA: OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
        ans: OUT STD_LOGIC:='1';
        modesel:OUT STD_LOGIC;
        waveform:OUT STD_LOGIC_VECTOR(1 DOWNTO 0);
        trigernum:OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
        delaytime:OUT STD_LOGIC_VECTOR(7 DOWNTO 0)
);
END Command_TxRx;

ARCHITECTURE bhv OF Command_TxRx IS
signal FTEMP:std_logic_vector(31 downto 0);
signal ATEMP:std_logic_vector(7 downto 0);
signal TRIGERTEMP:std_logic_vector(7 downto 0);
signal DELAYTEMP:std_logic_vector(7 downto 0);
signal enable:std_logic;
signal modeselect:std_logic;
signal waveselect:std_logic_vector(1 downto 0);

BEGIN
--COM1:
PROCESS(en,Sele)
BEGIN
IF en='1' THEN
        CASE Sele IS
        WHEN "0001" => modeselect<=DATAIN51(0);
        WHEN "0010" => waveselect(1 DOWNTO 0)<=DATAIN51(1 DOWNTO 0);
        WHEN "0011" => FTEMP(7 DOWNTO 0)<=DATAIN51(7 DOWNTO 0);
        WHEN "0100" => FTEMP(15 DOWNTO 8)<=DATAIN51(7 DOWNTO 0);
        WHEN "0101" => FTEMP(23 DOWNTO 16)<=DATAIN51(7 DOWNTO 0);
        WHEN "0110" => FTEMP(31 DOWNTO 24)<=DATAIN51(7 DOWNTO 0);
        WHEN "0111" => ATEMP(7 DOWNTO 0)<=DATAIN51(7 DOWNTO 0);
        WHEN "1000" => TRIGERTEMP(7 DOWNTO 0)<=DATAIN51(7 DOWNTO 0);
        WHEN "1001" => DELAYTEMP(7 DOWNTO 0)<=DATAIN51(7 DOWNTO 0);
        WHEN "1010" => enable<='0';
        WHEN OTHERS =>
--        modeselect<=modeselect;
--                                                waveselect<=waveselect;
--                                                FTEMP<=FTEMP;
--                                                ATEMP<=ATEMP;
--                                                TRIGERTEMP<=TRIGERTEMP;
--                                                DELAYTEMP<=DELAYTEMP;
--                                                enable<=enable;
        END CASE;
ELSE enable<='1';
END IF;
END PROCESS;
doutF<=FTEMP;
doutA<=ATEMP;
trigernum<=TRIGERTEMP;
delaytime<=DELAYTEMP;
ans<=enable;
modesel<=modeselect;
waveform<=waveselect;
END bhv;