汽车尾灯控制器的设计.doc

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1、汽车尾灯控制器的设计一、VHDL实现libraryieee;useieee.std_logic_1164.all;useieee.std_logic_unsigned.all;entityqcisport(clk,qd,right,left:instd_logic;rd:outstd_logic_vector(2downto0);ld:outstd_logic_vector(2downto0));endentityqc;architecturecarofqcissignalleftd:std_log

2、ic_vector(1downto0);signalrightd:std_logic_vector(1downto0);signalqdd:std_logic_vector(1downto0);signaldb:std_logic_vector(1downto0);begincontrol:process(clk,qd,left,right)beginifclk'eventandclk='1'thenifqdd="00"thenqdd<="10";elseqdd<=(qdd-1);endif;ifr

3、ightd="01"thenrightd<="11";elserightd<=(rightd-1);endif;ifleftd="01"thenleftd<="11";elseleftd<=(leftd-1);endif;ifdb="01"thendb<="11";elsedb<=(db-1);endif;endif;endprocess;proout:process(clk,qd,right,left,qdd,rightd,leftd)beginifclk'eventandclk='1'theni

4、fqd='1'thenld<="111";rd<="111";caseqddiswhen"00"=>ld<="000";rd<="000";when"10"=>ld<="111";rd<="111";when"01"=>ld<="000";rd<="000";whenothers=>ld<="000";rd<="000";endcase;elsifqd='0'thenld<="000";rd<="000";endif;ifright='1'thenld<="000";caserightdiswhen

5、"01"=>rd<="001";when"10"=>rd<="010";when"11"=>rd<="100";whenothers=>rd<="000";endcase;endif;ifleft='1'thenrd<="000";caseleftdiswhen"01"=>ld<="100";when"10"=>ld<="010";when"11"=>ld<="001";whenothers=>ld<="000";endcase;endif;ifleft='1'andright='1'thencas

6、edbiswhen"01"=>ld<="111";rd<="111";when"10"=>ld<="000";rd<="000";when"11"=>ld<="000";rd<="000";whenothers=>ld<="000";rd<="000";endcase;endif;endif;endprocess;endcar;二、调试仿真