多功能波形发生器VHDL程序与仿真

文章摘要： if count0=4999999 then counter:=conv_integer(amp)*1961;count0:=0; bcd01<=0; bcd11<=0; bcd21<=0; bcd31<=0; elsif count0=4999000 then bcd00<=bcd01; bcd10<=bcd11; bcd20<=bcd21; bcd30<=bcd31; count0:=count0+1; else count0:=count0+1; if counter>9999

多功能波形发生器VHDL程序与仿真,标签：fpga是什么,fpga教程,http://www.88dzw.com

      if count0=4999999 then counter:=conv_integer(amp)*1961;

count0:=0; bcd01<=0; bcd11<=0; bcd21<=0; bcd31<=0;

         elsif count0=4999000 then bcd00<=bcd01; bcd10<=bcd11; bcd20<=bcd21;

bcd30<=bcd31; count0:=count0+1;

      else count0:=count0+1;

           if counter>99999 then counter:=counter-100000; bcd01<=bcd01+1;

        elsif counter>9999 then counter:=counter-10000; bcd11<=bcd11+1;

        elsif counter>999 then counter:=counter-1000; bcd21<=bcd21+1;

        elsif counter>99 then counter:=counter-100; bcd31<=bcd31+1;

        else null;

        end if;

      end if;

    end if;

  end if;

end process;

process(clk)                             --输出波形幅度（峰-峰值）数据译码动态显示

variable count : integer range 0 to 499999;

begin

if rising_edge(clk) then

    if count<=124999 then y<=bcd00; count:=count+1; shift<="0111"; lcd(0)<='0';

    elsif count<=249999 then y<=bcd10; count:=count+1; shift<="1011";lcd(0)<='1';

    elsif count<=374999 then y<=bcd20; count:=count+1; shift<="1101";lcd(0)<='1';

    elsif count<499999 then y<=bcd30; count:=count+1; shift<="1110";lcd(0)<='1';

    elsif count=499999 then y<=bcd30; count:=0; shift<="1110";lcd(0)<='1';

    end if;

end if;

case y is                               --7段码译码

    when 0 => lcd(7 downto 1)<="0000001";

    when 1 => lcd(7 downto 1)<="1001111";

    when 2 => lcd(7 downto 1)<="0010010";

    when 3 => lcd(7 downto 1)<="0000110";

    when 4 => lcd(7 downto 1)<="1001100";

    when 5 => lcd(7 downto 1)<="0100100";

    when 6 => lcd(7 downto 1)<="0100000";

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