16×16點(diǎn)陣eda課程設(shè)計(jì)報(bào)告

1、<p>　　EDA 綜 合 實(shí) 踐 總 結(jié) 報(bào) 告</p><p>　　一、綜合實(shí)踐的目的………………………………………………3</p><p>　　二、綜合實(shí)踐理論基礎(chǔ)和核心內(nèi)容………………………………3</p><p>　　三、綜合實(shí)踐具體內(nèi)容和記錄………………………………………………………3</p><p>　　四、綜合實(shí)踐總

2、結(jié)及分析…………………………………………7</p><p>　　五、綜合實(shí)踐所需儀器設(shè)備………………………………………7</p><p>　　六、參考資料………………………………………………………7</p><p>　　七、成績(jī)?cè)u(píng)定表……………………………………………………8</p><p><b>　　一、綜合實(shí)踐的目的</

3、b></p><p>　　1.熟悉MAX+PLUSⅡ編程環(huán)境。</p><p>　　2.掌握MAX+PLUSⅡ原理圖輸入和文本輸入。</p><p>　　3.掌握MAX+PLUSⅡ?qū)υO(shè)計(jì)文件的編譯和仿真。</p><p>　　4.掌握VHDL語言中的順序語句和并行語句以及程序的基本結(jié)構(gòu)。</p><p>　　5.

4、了解點(diǎn)陣屏顯示字符的原理與過程。 </p><p>　　二、綜合實(shí)踐理論基礎(chǔ)和核心內(nèi)容</p><p>　　1. 給點(diǎn)陣24HZ以上的列掃描信號(hào)，同時(shí)給行不同的字符編碼，從而讓點(diǎn)陣顯示不同的花色和字符 </p><p>　　2. 用兩個(gè)三八譯碼器對(duì)四位二進(jìn)制數(shù)進(jìn)行譯碼從而實(shí)現(xiàn)16位二進(jìn)制數(shù)的循環(huán)移位，以此作為16位列掃描信號(hào)。</p><p&g

5、t;　　3. 點(diǎn)陣控制器的rst時(shí)鐘輸入用來控制行依次亮滅的速度，因此其頻率必須小于24HZ以保證人眼能夠區(qū)分。</p><p>　　4. din用來控制點(diǎn)陣顯示不同的字符和花色，應(yīng)當(dāng)在實(shí)驗(yàn)開始前就接高電平或低電平,當(dāng)din給低電平時(shí)，點(diǎn)陣的行從上往下依次點(diǎn)亮后又從下往上依次熄滅；當(dāng)din給高電平時(shí)，點(diǎn)陣屏上循環(huán)顯示“中”“國(guó)”“人”三個(gè)字。</p><p>　　三、綜合實(shí)踐具體內(nèi)容

6、和記錄</p><p>　　程序清單如下所示library ieee;</p><p>　　use ieee.std_logic_1164.all;</p><p>　　use ieee.std_logic_unsigned.all;</p><p>　　entity X16 is</p><p>　　port(cl

7、k,rst:in std_logic;</p><p>　　dout:out std_logic_vector(15 downto 0);</p><p>　　hl:buffer std_logic_vector(3 downto 0));</p><p><b>　　end X16;</b></p><p>　　arc

8、hitecture A of X16 is</p><p>　　signal row:std_logic_vector(15 downto 0);</p><p>　　signal dow:std_logic_vector(4 downto 0);</p><p><b>　　begin</b></p><p>　　A:

9、process(hl)</p><p><b>　　begin</b></p><p>　　case hl is</p><p>　　when "0000"=>row<="1000000000000000";</p><p>　　when "0001"

10、;=>row<="0100000000000000";</p><p>　　when "0010"=>row<="0010000000000000"; </p><p>　　when "0011"=> row<="0001000000000000";

11、 </p><p>　　when "0100"=> row<="0000100000000000"; </p><p>　　when "0101"=> row<="0000010000000000"; </p><p>　　wh

12、en "0110"=> row<="0000001000000000"; </p><p>　　when "0111"=> row<="0000000100000000"; </p><p>　　when "1000"=> row&l

13、t;="0000000010000000"; </p><p>　　when "1001"=> row<="0000000001000000"; </p><p>　　when "1010"=> row<="0000000000100000"

14、;; </p><p>　　when "1011"=> row<="0000000000010000"; </p><p>　　when "1100"=> row<="0000000000001000"; </p><p>　　when

15、 "1101"=> row<="0000000000000100"; </p><p>　　when "1110"=> row<="0000000000000010"; </p><p>　　when "1111"=> row<

16、="0000000000000001"; </p><p>　　when others=> row<="0000000000000000"; </p><p>　　END case; </p><p>　　end process A;</p><p>　　B:

17、process(clk,rst,dow)</p><p>　　variable m:integer:=0;</p><p><b>　　begin </b></p><p>　　if rst='1' then dout<="0000000000000000"; </p><p&g

18、t;　　hl<="0000"; dow<="00000"; </p><p>　　elsif clk'event and clk='1' then</p><p><b>　　m:=m+1;</b></p><p>　　if dow="10100

19、" then </p><p>　　dow<="00000"; </p><p>　　elsif m=300 then</p><p>　　dow<=dow+1;</p><p><b>　　m:=0;</b></p><p>　　end if;

20、</p><p>　　if hl>15 then </p><p>　　hl<="0000"; </p><p>　　else hl<=hl+1; </p><p><b>　　end if; </b></p>

21、;<p>　　case dow is </p><p>　　when "00000"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="000

22、0000000000000"; </p><p>　　when "0001" =>dout<="0000000000000000"; </p><p>　　when "0010" =>dout<="0000000000000000"; </p>

23、;<p>　　when "0011" =>dout<="0000000000000000"; </p><p>　　when "0100" =>dout<="0000000000000000"; </p><p>　　when "0101&

24、quot; =>dout<="0000000000000000"; </p><p>　　when "0110" =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000

25、000000000000"; </p><p>　　when "1000" =>dout<="0000000000000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; <

26、/p><p>　　when "1010" =>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　

27、　when "1100" =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>do

28、ut<="0000000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　

29、　end case; </p><p>　　when "00001"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111&quo

30、t;; </p><p>　　when "0001" =>dout<="0000000000000000"; </p><p>　　when "0010" =>dout<="0000000000000000"; </p><p>　　whe

31、n "0011" =>dout<="0000000000000000"; </p><p>　　when "0100" =>dout<="0000000000000000"; </p><p>　　when "0101" =>dout&l

32、t;="0000000000000000"; </p><p>　　when "0110" =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"

33、;; </p><p>　　when "1000" =>dout<="0000000000000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>

34、　　when "1010" =>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100&

35、quot; =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000

36、000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case;

37、 </p><p>　　when "00010"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p&g

38、t;<p>　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="0000000000000000"; </p><p>　　when "0011

39、" =>dout<="0000000000000000"; </p><p>　　when "0100" =>dout<="0000000000000000"; </p><p>　　when "0101" =>dout<="000

40、0000000000000"; </p><p>　　when "0110" =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"; <

41、;/p><p>　　when "1000" =>dout<="0000000000000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "

42、;1010" =>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100" =>d

43、out<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000

44、"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p>

45、;<p>　　when "00011"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>

46、;　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>

47、dout<="0000000000000000"; </p><p>　　when "0100" =>dout<="0000000000000000"; </p><p>　　when "0101" =>dout<="000000000000000

48、0"; </p><p>　　when "0110" =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"; </p><

49、;p>　　when "1000" =>dout<="0000000000000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "1010"

50、=>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100" =>dout<=&quo

51、t;0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000";

52、 </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　w

53、hen "00100"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0

54、001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="

55、1111111111111111"; </p><p>　　when "0100" =>dout<="0000000000000000"; </p><p>　　when "0101" =>dout<="0000000000000000";

56、</p><p>　　when "0110" =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"; </p><p>　　when &q

57、uot;1000" =>dout<="0000000000000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "1010" =>dout<=&

58、quot;0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100" =>dout<="0000000000000

59、000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p>&

60、lt;p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "00101&qu

61、ot;=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dou

62、t<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111&q

63、uot;; </p><p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="0000000000000000"; </p><p&

64、gt;　　when "0110" =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"; </p><p>　　when "1000" =&g

65、t;dout<="0000000000000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "1010" =>dout<="0000000000000

66、000"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100" =>dout<="0000000000000000"; &

67、lt;/p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when &qu

68、ot;1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "00110"=> </p

69、><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111111111

70、111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111"; </p>&

71、lt;p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "0110"

72、; =>dout<="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"; </p><p>　　when "1000" =>dout<="00000000

73、00000000"; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "1010" =>dout<="0000000000000000"; </p&

74、gt;<p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100" =>dout<="0000000000000000"; </p><p>　　whe

75、n "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when "1111" =>dout&l

76、t;="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p><b>　　end case;</b></p><p>　　when "00111"=> </p><p&

77、gt;　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111111111111";

78、 </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111"; </p><p>　　wh

79、en "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "0110" =>dout&

80、lt;="0000000000000000"; </p><p>　　when "0111" =>dout<="0000000000000000"; </p><p>　　when "1000" =>dout<="0000000000000000&quo

81、t;; </p><p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "1010" =>dout<="0000000000000000"; </p><p&g

82、t;　　when "1011" =>dout<="0000000000000000"; </p><p>　　when "1100" =>dout<="0000000000000000"; </p><p>　　when "1101

83、" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when "1111" =>dout<="111

84、1111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "01000"=> </p><p>　　case hl is

85、 </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111111111111"; </p><p

86、>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111"; </p><p>　　when "0100" =&

87、gt;dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "0110" =>dout<="111111111111

88、1111"; </p><p>　　when "0111" =>dout<="0000000000000000"; </p><p>　　when "1000" =>dout<="0000000000000000"; </p>

89、<p>　　when "1001" =>dout<="0000000000000000"; </p><p>　　when "1010" =>dout<="0000000000000000"; </p><p>　　when "1011&qu

90、ot; =>dout<="0000000000000000"; </p><p>　　when "1100" =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<=&

91、quot;0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111";

92、 </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "01001"=> </p><p>　　case hl is &

93、lt;/p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "001

94、0" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111"; </p><p>　　when "0100" =>dout<="11

95、11111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "0110" =>dout<="1111111111111111"; &l

96、t;/p><p>　　when "0111" =>dout<="1111111111111111"; </p><p>　　when "1000" =>dout<="0000000000000000"; </p><p>　　when &quo

97、t;1001" =>dout<="0000000000000000"; </p><p>　　when "1010" =>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<=&q

98、uot;0000000000000000"; </p><p>　　when "1100" =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="000000000000000

99、0"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><

100、;p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "01010"=> </p><p>　　case hl is </p><p>　　w

101、hen "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<=&

102、quot;1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111"; </p><p>　　when "0100" =>dout<="1111111111111111";

103、 </p><p>　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "0110" =>dout<="1111111111111111"; </p><p>　　wh

104、en "0111" =>dout<="1111111111111111"; </p><p>　　when "1000" =>dout<="1111111111111111"; </p><p>　　when "1001" =>dout&

105、lt;="0000000000000000"; </p><p>　　when "1010" =>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000&qu

106、ot;; </p><p>　　when "1100" =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p&g

107、t;<p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>

108、;dout<=null; </p><p>　　end case; </p><p>　　when "01011"=> </p><p>　　case hl is </p><p>　　when "0000" =&

109、gt;dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111&q

110、uot;; </p><p>　　when "0011" =>dout<="1111111111111111"; </p><p>　　when "0100" =>dout<="1111111111111111"; </p><p&

111、gt;　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "0110" =>dout<="1111111111111111"; </p><p>　　when "0111" =&g

112、t;dout<="1111111111111111"; </p><p>　　when "1000" =>dout<="1111111111111111"; </p><p>　　when "1001" =>dout<="1111111111111

113、111"; </p><p>　　when "1010" =>dout<="0000000000000000"; </p><p>　　when "1011" =>dout<="0000000000000000"; &

114、lt;/p><p>　　when "1100" =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when &qu

115、ot;1110" =>dout<="0000000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; &

116、lt;/p><p>　　end case; </p><p>　　when "01100"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="11111

117、11111111111"; </p><p>　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p>

118、<p>　　when "0011" =>dout<="1111111111111111"; </p><p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101&qu

119、ot; =>dout<="1111111111111111"; </p><p>　　when "0110" =>dout<="1111111111111111"; </p><p>　　when "0111" =>dout<="111111

120、1111111111"; </p><p>　　when "1000" =>dout<="1111111111111111"; </p><p>　　when "1001" =>dout<="1111111111111111"; </p

121、><p>　　when "1010" =>dout<="1111111111111111"; </p><p>　　when "1011" =>dout<="0000000000000000"; </p><p>　　w

122、hen "1100" =>dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout

123、<="0000000000000000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　e

124、nd case; </p><p>　　when "01101"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; <

125、/p><p>　　when "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "

126、0011" =>dout<="1111111111111111"; </p><p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="

127、;1111111111111111"; </p><p>　　when "0110" =>dout<="1111111111111111"; </p><p>　　when "0111" =>dout<="1111111111111111";

128、 </p><p>　　when "1000" =>dout<="1111111111111111"; </p><p>　　when "1001" =>dout<="1111111111111111"; </p><p>　　when &

129、quot;1010" =>dout<="1111111111111111"; </p><p>　　when "1011" =>dout<="1111111111111111"; </p><p>　　when "1100" =&

130、gt;dout<="0000000000000000"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="000000000000

131、0000"; </p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p>

132、<p>　　when "01110"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when

133、 "0001" =>dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<

134、;="1111111111111111"; </p><p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"

135、; </p><p>　　when "0110" =>dout<="1111111111111111"; </p><p>　　when "0111" =>dout<="1111111111111111"; </p><p>　

136、　when "1000" =>dout<="1111111111111111"; </p><p>　　when "1001" =>dout<="1111111111111111"; </p><p>　　when "1010" =>do

137、ut<="1111111111111111"; </p><p>　　when "1011" =>dout<="1111111111111111"; </p><p>　　when "1100" =>dout<="11111

138、11111111111"; </p><p>　　when "1101" =>dout<="0000000000000000"; </p><p>　　when "1110" =>dout<="0000000000000000"; </

139、p><p>　　when "1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "0

140、1111"=> </p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>

141、dout<="1111111111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="111111111111111

142、1"; </p><p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"; </p><

143、;p>　　when "0110" =>dout<="1111111111111111"; </p><p>　　when "0111" =>dout<="1111111111111111"; </p><p>　　when "1000"

144、=>dout<="1111111111111111"; </p><p>　　when "1001" =>dout<="1111111111111111"; </p><p>　　when "1010" =>dout<="1111111111

145、111111"; </p><p>　　when "1011" =>dout<="1111111111111111"; </p><p>　　when "1100" =>dout<="1111111111111111";

146、 </p><p>　　when "1101" =>dout<="1111111111111111"; </p><p>　　when "1110" =>dout<="0000000000000000"; </p><p>　　when

147、"1111" =>dout<="1111111111111111"; </p><p>　　when others=>dout<=null; </p><p>　　end case; </p><p>　　when "10000"=>

148、</p><p>　　case hl is </p><p>　　when "0000" =>dout<="1111111111111111"; </p><p>　　when "0001" =>dout<="1111111

149、111111111"; </p><p>　　when "0010" =>dout<="1111111111111111"; </p><p>　　when "0011" =>dout<="1111111111111111"; </p&

150、gt;<p>　　when "0100" =>dout<="1111111111111111"; </p><p>　　when "0101" =>dout<="1111111111111111"; </p><p>　　when "011