{"rsdb":{"rid":"180377","subhead":"","postdate":"0","aid":"130802","fid":"92","uid":"1","topic":"1","content":"
\n

       \u8fd9\u7bc7\u8bb2\u7684\u662f\u4f7f\u7528 verilog \u786c\u4ef6\u63cf\u8ff0\u8bed\u8a00\u7f16\u5199\u4e00\u4e2a 3 - 8 \u8bd1\u7801\u5668\u3002<\/span><\/p> \n

       3 - 8 \u8bd1\u7801\u5668\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u7ec4\u5408\u903b\u8f91\uff0c\u7528\u4e8e\u5b9e\u73b0\u5e76\u8f6c\u4e32\uff0c\u5176\u8f93\u5165\u8f93\u51fa\u5173\u7cfb\u5982\u4e0b\uff1a<\/span><\/p> \n

                     | \u8f93\u5165<\/span>  |  \u8f93\u51fa<\/span>  |<\/span><\/p> \n

                     -----------------<\/span><\/p> \n

                     000 --> 0000_0001<\/span><\/p> \n

                     001 --> 0000_0010<\/span><\/p> \n

                     010 --> 0000_0100<\/span><\/p> \n

                     011 --> 0000_1000<\/span><\/p> \n

                     100 --> 0001_0000<\/span><\/p> \n

                     101 --> 0010_0000<\/span><\/p> \n

                     110 --> 0100_0000<\/span><\/p> \n

                     111 --> 1000_0000<\/span><\/p> \n

      \u65b0\u5efa\u5de5\u7a0b\uff0c\u5e76\u65b0\u5efa\u5982\u4e0b\u7684\u4ee3\u7801\u7684 verilog HDL \u6587\u4ef6<\/span><\/p> \n

\n 
module<\/span>   my38decode\r\n(\r\n      <\/span>input<\/span> wire<\/span> [2<\/span>:0<\/span>] a,  \r\n      <\/span>output<\/span> reg<\/span> [7<\/span>:0<\/span>] y\r\n);\r\n<\/span>\/\/<\/span>*********************<\/span>\/\/\r\n<\/span>     integer<\/span> i;         \r\n<\/span>\/\/<\/span>*********************<\/span>\/\/\r\n<\/span>    always<\/span> @ (*)\r\n    <\/span>begin<\/span>\r\n        for<\/span> (i=0<\/span>;i<=7<\/span>;i=i+1<\/span>)  \/\/<\/span> a = 0 \u65f6\uff0cy[0] = 1'b1, y = 8'b0000_0001<\/span>\r\n          if<\/span> (a == i)         \/\/<\/span> a = 1 \u65f6\uff0cu[1] = 1'b1, y = 8'b0000_0010<\/span>\r\n             y[i] = 1<\/span>'<\/span>b1;<\/span>\r\n          else<\/span>\r\n             y[i] <\/span>= 1<\/span>'<\/span>b0;<\/span>\r\n     end<\/span><\/pre> \n  
endmodule<\/span><\/pre> \n <\/div> \n 
\u8fd9\u6bb5\u4ee3\u7801\u5176\u5b9e\u76f8\u5f53\u62bd\u8c61\uff08\u5faa\u73af\u53d8\u91cf\u64cd\u4f5c\u4e0b\u6807\uff09\uff0c\u4f46\u597d\u5728\u7efc\u5408\u5de5\u5177\u8fd8\u662f\u80fd\u591f\u7406\u89e3\u6211\u4eec\u7684\u7528\u610f\u3002<\/p> \n 
\u5efa\u597d\u7684\u5de5\u7a0b\u5982\u4e0b\u56fe\uff1a<\/p> \n 
\"project\"<\/a><\/p> \n 
        \u53ef\u4ee5\u5728 Tool --> Netlist Viewers --> RTL Viewer \u67e5\u770b\u751f\u6210\u7684 RTL \u7f51\u8868\u6587\u4ef6\u3002<\/p> \n 
        \u4e0b\u56fe\u4e3a Tool \u83dc\u5355\u548c\u751f\u6210\u7684\u7f51\u8868\u6587\u4ef6\u3002\u53ef\u4ee5\u770b\u51fa\u6211\u4eec\u5199\u7684\u4ee3\u7801\u751f\u6210\u4e86\u51e0\u4e2a\u6bd4\u8f83\u5668\uff0c\u6211\u4eec\u7684\u8f93\u5165\u4fe1\u53f7\u88ab\u6269\u5927\u81f3 32 \u4f4d\uff08\u524d29\u4f4d\u81ea\u52a8\u586b 0\uff09\uff1b\u6bd4\u8f83\u5668\u7684 B \u7aef\u53e3\u8fde\u63a5\u7684\u662f\u4e00\u4e9b\u5e38\u91cf\uff0c\u5f53 32 \u4f4d\u6bd4\u8f83\u5668\u5728\u8f93\u5165\u76f8\u7b49\u65f6\u8f93\u51fa 1\uff0c\u4e0d\u7b49\u5219\u8f93\u51fa 0\uff1b7 \u4e2a\u6bd4\u8f83\u5668\u8f93\u51fa\u5206\u522b\u8fde\u63a5\u5230 y \u7684 7 \u4e2a\u5f15\u811a\u4e0a\u3002\u5982\u56fe\uff0c\u7efc\u5408\u5668\u5728 RTL\uff08\u5bc4\u5b58\u5668\u4f20\u8f93\u7ea7\uff09\u6210\u529f\u7684\u5b9e\u73b0\u4e86\u6211\u4eec\u7684\u8981\u6c42\u3002<\/p> \n 
\"Tool\u83dc\u5355\"<\/a>\"RTL\"<\/a><\/p>\n<\/div>","orderid":"0","title":"\u6211\u7684 FPGA \u5b66\u4e60\u5386\u7a0b\uff0804\uff09\u2014\u2014 \u7ec3\u4e60 verilog \u786c\u4ef6\u63cf\u8ff0\u8bed\u8a00","smalltitle":"","mid":"0","fname":"Verilog","special_id":"0","bak_id":"0","info":"0","hits":"2605","pages":"1","comments":"0","posttime":"2017-10-10 12:30:24","list":"1507609824","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/article\/92\/1_hksk9__.png","ispic":"1","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"FPGA<\/A> \u5b66\u4e60<\/A> \u5386\u7a0b<\/A> \u7ec3\u4e60<\/A> verilog<\/A> \u786c\u4ef6<\/A> \u63cf\u8ff0<\/A> \u8bed\u8a00<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"113.108.110.181","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"\u6211\u7684 FPGA \u5b66\u4e60\u5386\u7a0b\uff0804\uff09\u2014\u2014 \u7ec3\u4e60 verilog \u786c\u4ef6\u63cf\u8ff0\u8bed\u8a00","lastview":"1713025076","digg_num":"9244","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}