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library ieee;<br />use ieee.std_logic_1164.all;<br />use ieee.std_logic_unsigned.all;<br /><br />entity test1 is<br /> port( clk :in std_logic;<br /> sense :in std_logic_vector(2 downto 0);<br /> moto11 :out std_logic;<br /> moto12 :out std_logic;<br /> moto21 :out std_logic;<br /> moto22 :out std_logic<br /> );<br />end;<br /><br /><br />architecture one of test1 is <br /> signal sm_cnt :integer range 0 to 16000-1; <br /> signal cnt1 :integer range 0 to 16000; <br /> signal scan_clk :std_logic; <br /> signal scan :integer range 0 to 100 ;<br /> signal scan1 :integer range 0 to 100 ;<br /> <br /><br /><br /><br />------------------------------------------------------- <br />begin<br />------------------------------------------------------------<br /><br />------------------------------------------------------------<br /> process(clk)<br /> begin <br /> if clk'event and clk='1' then <br /> if sm_cnt=16000-1 then sm_cnt<=0; <br /> else sm_cnt<=sm_cnt+1;<br /> end if;<br /> end if;<br /> end process;<br /> moto11<='1' when sm_cnt<scan else<br /> '0';<br />---------------------------------------<br />process(clk)<br />begin<br />if clk'event and clk='1' then <br /> if cnt1=16000-1 then cnt1<=0;<br /> else cnt1<=cnt1+1;<br /> end if;<br /> end if;<br /> end process;<br />moto21<='1' when cnt1<scan1 else<br /> '0'; <br />----------------------------------<br />process(sense)<br />begin<br />scan1<=10;<br />case sense is<br />when "000" => scan<=0;<br />when "001" => scan<=10; <br />when "010" => scan<=40; <br />when "011" => scan<=10; <br />when "100" => scan<=80; <br />when "110" => scan<=80;<br />when others=> scan<=10;<br />end case;<br />end process;<br />moto12<='0';moto22<='0';<br /><br /> end;<br /><br />只能有停和全速转动状态 请高手帮忙看下 急！！！<br />谢谢！！ |
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