新建 文本文档 (3).txt

CPLD可编程逻辑芯片上实现信号发生器的方法和步骤

                  else
                    cnt2:=0;
                    n:=10;
                  end if;
          when 10=>d2<=4535;
                  if cnt2<7 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=11;
                  end if;
          when 11=>d2<=5089;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=12;
                  end if;
          when 12=>d2<=6061;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=13;
                  end if;
          when 13=>d2<=7634;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=14;
                  end if;
          when 14=>d2<=6803;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=15;
                  end if;
          when 15=>d2<=7634;
                    n:=16;
          when 16=>d2<=6803;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=17;
                  end if;
          when 17=>d2<=6061;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=18;
                  end if;  
          when 18=>d2<=7634;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=19;
                  end if;
          when 19=>d2<=9050;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=20;
                  end if;
          when 20=>d2<=10204;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=21;
                  end if;
          when 21=>d2<=7634;
                  if cnt2<5 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=22;
                  end if;
          when 22=>d2<=4535;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=23;
                  end if;
          when 23=>d2<=5089;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=24;
                  end if;
          when 24=>d2<=6061;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=25;
                  end if;
          when 25=>d2<=7634;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=26;
                  end if;
          when 26=>d2<=6803;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=27;
                  end if;
          when 27=>d2<=7634;
                    n:=28;
          when 28=>d2<=6803;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=29;
                  end if;
          when 29=>d2<=4535;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=30;
                  end if;
          when 30=>d2<=5089;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=31;
                  end if;
          when 31=>d2<=6061;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=32;
                  end if;
          when 32=>d2<=5089;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=33;
                  end if;
          when 33=>d2<=4535;
                  if cnt2<5 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=34;
                  end if;
          when 34=>d2<=3809;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=35;
                  end if;
          when 35=>d2<=5089;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=36;
                  end if;
          when 36=>d2<=6061;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=37;
                  end if;
          when 37=>d2<=7634;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=38;
                  end if;
          when 38=>d2<=6803;
                  if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=39;
                  end if;
          when 39=>d2<=7634;
                   n:=40; 
          when 40=>d2<=6803;
                  if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0;
                    n:=41;
                  end if;