{"id":443,"date":"2013-04-11T23:40:47","date_gmt":"2013-04-11T15:40:47","guid":{"rendered":"http:\/\/blog.staryland.com\/?p=443"},"modified":"2013-04-11T23:40:47","modified_gmt":"2013-04-11T15:40:47","slug":"conv_std_logic_vector","status":"publish","type":"post","link":"https:\/\/zhuangzr.me\/wordpress\/2013\/04\/conv_std_logic_vector\/","title":{"rendered":"VHDL\u4e2d\u6574\u5f62\u53d8\u91cf\u8f6c\u6362\u4e3a\u6807\u51c6\u903b\u8f91\u53d8\u91cf\u5e94\u6ce8\u610f\u7684\u95ee\u9898"},"content":{"rendered":"<h1>VHDL\u4e2d\u7684\u6570\u636e\u8f6c\u6362\u51fd\u6570conv_std_logic_vector\u7684\u7528\u6cd5<\/h1>\n<p>std_logic_arith\u7a0b\u5e8f\u5305\u91cc\u5b9a\u4e49\u7684\u6570\u636e\u8f6c\u6362\u51fd\u6570\uff1aconv_std_logic_vector\uff08int_var,bit_len\uff09&#8211;INTEGER,SINGER,UNSIGNED\u8f6c\u6362\u6210std_logic_vector<\/p>\n<p>\u7531\u4e8e\u53c2\u8003\u4e66\u4e0a\u90fd\u6ca1\u6709\u5177\u4f53\u8bf4\u660e\uff0c\u672c\u4ee5\u4e3a\u662f\u5c06\u539f\u6765\u7684\u6570\u636e\u7c7b\u578b\u6309\u4f4d\u77e2\u91cf\u8f93\u51fa\uff0c\u7ed3\u679c\u6309\u8fd9\u79cd\u7528\u6cd5\u7f16\u5199\u7684\u6ee4\u6ce2\u5668\u5728\u63a5\u5b9e\u9645\u4fe1\u53f7\u65f6\uff0c\u5374\u4f7f\u7528\u8f93\u51fa\u56fe\u50cf\u5168\u90e8\u53cd\u8272\uff0c\u7ecfmodelsim\u6ce2\u5f62\u4eff\u771f\u4e4b\u540e\uff0c\u624d\u53d1\u73b0\u6ee4\u6ce2\u5668\u7ed3\u6784\u662f\u6b63\u786e\u7684\uff0c\u53ef\u662f\u8c03\u7528\u4e86\u8f6c\u6362\u51fd\u6570\u4e4b\u540e\uff0c\u7ed3\u679c\u975e\u9884\u671f\u6548\u679c\u3002<\/p>\n<p>\u5bf9\u8be5\u8f6c\u6362\u51fd\u6570\u505a\u4e86\u6d4b\u8bd5\u4e4b\u540e\uff0c\u624d\u53d1\u73b0\uff1a\u8be5\u51fd\u6570\u7684\u8f6c\u6362\u7ed3\u679c\u662f\u5c06\u88ab\u8f6c\u6362\u7684\u6570\u636e\u5148\u8f6c\u6362\u62102\u8fdb\u5236\u8865\u7801\u5f62\u5f0f\uff0c\u7136\u540e\u53d6\u5176\u4f4e\u201c\u4f4d\u957f\u201d\uff0c\u4f5c\u4e3a\u8f93\u51fa\u3002<\/p>\n<p>\u5982\uff1aa&lt;=conv_std_logic_vector\uff08-79\uff0c6\uff09&#8212;-\uff08-79\uff092c=\uff0810110001\uff09<\/p>\n<p>b&lt;=conv_std_logic_vector\uff08-2\uff0c6\uff09&#8212;&#8211;\uff08-2\uff092c=\uff0811111110\uff09<\/p>\n<p>c&lt;=conv_std_logic_vector\uff08100\uff0c6\uff09&#8212;&#8211;\uff08100\uff092c=\uff0801100100\uff09<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1aa=110001\uff0cb=111110\uff0cc=100100<\/p>\n","protected":false},"excerpt":{"rendered":"<p>VHDL\u4e2d\u7684\u6570\u636e\u8f6c\u6362\u51fd\u6570conv_std_logic_vector\u7684\u7528\u6cd5 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