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

                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 33=>
        case sel is
          when"0000"=>q<="1000000000000100";          when"0001"=>q<="0110000000010100";          when"0010"=>q<="0001111111010100";          when"0011"=>q<="0000001001010100";          when"0100"=>q<="0000001001010100";          when"0101"=>q<="0000001001010100";          when"0110"=>q<="0000001001010100";          when"0111"=>q<="0000001111011111";         when"1000"=>q<="0000001001010100";          when"1001"=>q<="0000001001010100";          when"1010"=>q<="0000001001010100";          when"1011"=>q<="0000001001010100";          when"1100"=>q<="0000011111110100";          when"1101"=>q<="0000000001010110";          when"1110"=>q<="0000000000000100";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                   end if; 
       when 34=>
        case sel is
          when"0000"=>q<="0000000100000010";          when"0001"=>q<="0111110101111010";          when"0010"=>q<="0010010101001010";          when"0011"=>q<="0010010101001010";          when"0100"=>q<="0111110101111010";          when"0101"=>q<="1000000100000010";          when"0110"=>q<="0111111111111111";          when"0111"=>q<="1000000101000010";          when"1000"=>q<="0100000000100000";          when"1001"=>q<="0011000000011000";          when"1010"=>q<="0000111111010111";          when"1011"=>q<="0011000000010000";          when"1100"=>q<="0100000001010000";          when"1101"=>q<="1100000000110000";          when"1110"=>q<="0100000000000000";         when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
       when 35=>
        case sel is
          when"0000"=>q<="0000000001000000";          when"0001"=>q<="0001100000110000";          when"0010"=>q<="0001011100001110";          when"0011"=>q<="0001000011100000";          when"0100"=>q<="0001010000001110";          when"0101"=>q<="0011100000010000";          when"0110"=>q<="1000000000100010";          when"0111"=>q<="1000111111110010";          when"1000"=>q<="0100000000010010";          when"1001"=>q<="0010000000011010";          when"1010"=>q<="0001111111010110";          when"1011"=>q<="0010000000010010";          when"1100"=>q<="0010000000010010";          when"1101"=>q<="0100111111111011";          when"1110"=>q<="1000000000010010";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 36=>
        case sel is
          when"0000"=>q<="0001000000001000";          when"0001"=>q<="1000100000001000";          when"0010"=>q<="1000010000001000";          when"0011"=>q<="0100001100001000";          when"0100"=>q<="0100000011001000";          when"0101"=>q<="0010000101111111";          when"0110"=>q<="0010001001001000";          when"0111"=>q<="0001010001001000";          when"1000"=>q<="0000100001001000";          when"1001"=>q<="0001010001001000";          when"1010"=>q<="0010001101001000";          when"1011"=>q<="0010000011001000";          when"1100"=>q<="0100000000001000";          when"1101"=>q<="1100000000001100";          when"1110"=>q<="0100000000001000";
          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case;
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 37=>
        case sel is
          when"0000"=>q<="0000000001000000";          when"0001"=>q<="0000000001000010";          when"0010"=>q<="0111111111001100";          when"0011"=>q<="0010000000010000";          when"0100"=>q<="0101000000001100";          when"0101"=>q<="0100000000000100";          when"0110"=>q<="0111111111100100";          when"0111"=>q<="0100100100100100";          when"1000"=>q<="0100100100100101";          when"1001"=>q<="0100100100100110";          when"1010"=>q<="0100100100100100";          when"1011"=>q<="0100100100100100";          when"1100"=>q<="0111111111100100";          when"1101"=>q<="0100000000010100";          when"1110"=>q<="0100000000001100";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 38=>
        case sel is
          when"0000"=>q<="0010000001000000";          when"0001"=>q<="0110000001000000";          when"0010"=>q<="0011111111111110";          when"0011"=>q<="0001000001000000";          when"0100"=>q<="0001000001000000";          when"0101"=>q<="0000000010000000";          when"0110"=>q<="0011111111111100";          when"0111"=>q<="0100000001000000";          when"1000"=>q<="0100000001000000";          when"1001"=>q<="0101111111111111";          when"1010"=>q<="0100010000100000";          when"1011"=>q<="0100100000100000";          when"1100"=>q<="0100011111110000";          when"1101"=>q<="0100000000100000";          when"1110"=>q<="0111000000000000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
       when 39=>
        case sel is
          when"0000"=>q<="0100000000000000";          when"0001"=>q<="0100000000000000";          when"0010"=>q<="0010000001000000";          when"0011"=>q<="0010000000100000";          when"0100"=>q<="0001000000011000";          when"0101"=>q<="0000100000000111";          when"0110"=>q<="0000010000000100";         when"0111"=>q<="0000001100000100";          when"1000"=>q<="0000000011100100";          when"1001"=>q<="0000001100011110";          when"1010"=>q<="0000110000000100";          when"1011"=>q<="0001000000000000";          when"1100"=>q<="0010000000000000";          when"1101"=>q<="0110000000000000";          when"1110"=>q<="0010000000000000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                   end if; 
       when 40=>
        case sel is
          when"0000"=>q<="1000000001000000";         when"0001"=>q<="1000000001000010";          when"0010"=>q<="0100000001000010";          when"0011"=>q<="0010000001000010";          when"0100"=>q<="0001000001000010";          when"0101"=>q<="0000110001000010";          when"0110"=>q<="0000001101000010";          when"0111"=>q<="0000000011111110";          when"1000"=>q<="0000001101000010";          when"1001"=>q<="0000110001000010";          when"1010"=>q<="0001000001000010";          when"1011"=>q<="0010000001000010";          when"1100"=>q<="0100000001000011";          when"1101"=>q<="1100000001100010";          when"1110"=>q<="0100000001000010";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 41=>
        case sel is
          when"0000"=>q<="0000000010000000";          when"0001"=>q<="0000000010000000";          when"0010"=>q<="0000000010000000";          when"0011"=>q<="0000000010000000";          when"0100"=>q<="1111111111111111";          when"0101"=>q<="0100000010000000";          when"0110"=>q<="0100000010000000";         when"0111"=>q<="0010001110100000";          when"1000"=>q<="0000010010010000";          when"1001"=>q<="0000100010001000";          when"1010"=>q<="0001000010000100";         when"1011"=>q<="0010000010000110";          when"1100"=>q<="0110000010000000";          when"1101"=>q<="0010000011000000";         when"1110"=>q<="0000000010000000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<5 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 42=>
        case sel is
          when"0000"=>q<="0000001000010000";          when"0001"=>q<="0000001000010000";          when"0010"=>q<="0000100100010001";          when"0011"=>q<="0000100010010010";          when"0100"=>q<="0000100101010110";          when"0101"=>q<="0000100100110000";          when"0110"=>q<="0000100100010001";          when"0111"=>q<="1111111111010110";          when"1000"=>q<="0000100100010000";          when"1001"=>q<="0000100100111000";          when"1010"=>q<="0000100101010100";          when"1011"=>q<="0000110010010010";          when"1100"=>q<="0000100100010011";          when"1101"=>q<="0000001100011000";          when"1110"=>q<="0000000100010000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                   end if; 
       when 43=>
        case sel is
          when"0000"=>q<="0000010000010000";          when"0001"=>q<="0000001100010000";          when"0010"=>q<="0000000011010000";          when"0011"=>q<="1111111111111111";          when"0100"=>q<="0000100010010000";          when"0101"=>q<="0000010100010100";          when"0110"=>q<="0000001000000100";          when"0111"=>q<="0000000100000100";          when"1000"=>q<="0000000010000100";          when"1001"=>q<="1111111111100100";          when"1010"=>q<="0000000000011100";          when"1011"=>q<="0000000010000100";          when"1100"=>q<="0000000100000100";          when"1101"=>q<="0000001000000110";          when"1110"=>q<="0000011000000100";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 44=>
        case sel is
          when"0000"=>q<="0000010000010000";          when"0001"=>q<="0100011001100000";          when"0010"=>q<="0011000100000000";          when"0011"=>q<="0000111111111100";          when"0100"=>q<="0000000000000100";          when"0101"=>q<="1111111110010100";          when"0110"=>q<="0000101010010100";          when"0111"=>q<="0000101010010101";          when"1000"=>q<="0000101010110110";          when"1001"=>q<="1111111111010000";          when"1010"=>q<="0000101010110100";          when"1011"=>q<="0100101010010100";          when"1100"=>q<="1000101010010100";          when"1101"=>q<="0111111111000110";          when"1110"=>q<="0000000010000100";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
       when 45=>
        case sel is
          when"0000"=>q<="0000000100000000";         when"0001"=>q<="0000000010000000";          when"0010"=>q<="0000000001100000";          when"0011"=>q<="0111111110011111";          when"0100"=>q<="0010000000010000";          when"0101"=>q<="0001000001010000";          when"0110"=>q<="1000100000110000";          when"0111"=>q<="0100000001000000";          when"1000"=>q<="0011000000100000";          when"1001"=>q<="0000110000011000";          when"1010"=>q<="0000001111010111";          when"1011"=>q<="0001110000010000";          when"1100"=>q<="0110000000010000";          when"1101"=>q<="1100000001010000";          when"1110"=>q<="0100000000100000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 46=>
        case sel is
          when"0000"=>q<="0000000000000000";          when"0001"=>q<="1111111111111110";          when"0010"=>q<="0000000000000010";          when"0011"=>q<="0000000000010010";          when"0100"=>q<="0011111110010010";          when"0101"=>q<="0001000010010010";          when"0110"=>q<="0001000010010010";          when"0111"=>q<="0001000010010010";          when"1000"=>q<="0001000010010010";          when"1001"=>q<="0001000010010010";          when"1010"=>q<="0011111111011010";          when"1011"=>q<="0100000010010010";          when"1100"=>q<="1000000000000010";          when"1101"=>q<="0111111111111111";          when"1110"=>q<="0000000000000010";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                   end if; 
       when 47=>
        case sel is
          when"0000"=>q<="1000000000000100";          when"0001"=>q<="0110000000010100";         when"0010"=>q<="0001111111010100";          when"0011"=>q<="0000001001010100";          when"0100"=>q<="0000001001010100";          when"0101"=>q<="0000001001010100";          when"0110"=>q<="0000001001010100";          when"0111"=>q<="0000001111011111";          when"1000"=>q<="0000001001010100";          when"1001"=>q<="0000001001010100";          when"1010"=>q<="0000001001010100";          when"1011"=>q<="0000001001010100";          when"1100"=>q<="0000011111110100";          when"1101"=>q<="0000000001010110";          when"1110"=>q<="0000000000000100";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 48=>
        case sel is
          when"0000"=>q<="0000000100000010";          when"0001"=>q<="0111110101111010";          when"0010"=>q<="0010010101001010";          when"0011"=>q<="0010010101001010";          when"0100"=>q<="0111110101111010";          when"0101"=>q<="1000000100000010";          when"0110"=>q<="0111111111111111";          when"0111"=>q<="1000000101000010";          when"1000"=>q<="0100000000100000";          when"1001"=>q<="0011000000011000";          when"1010"=>q<="0000111111010111";          when"1011"=>q<="0011000000010000";          when"1100"=>q<="0100000001010000";          when"1101"=>q<="1100000000110000";          when"1110"=>q<="0100000000000000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
       when 49=>
        case sel is
          when"0000"=>q<="0000000001000000";          when"0001"=>q<="0001100000110000";         when"0010"=>q<="0001011100001110";          when"0011"=>q<="0001000011100000";          when"0100"=>q<="0001010000001110";          when"0101"=>q<="0011100000010000";          when"0110"=>q<="1000000000100010";          when"0111"=>q<="1000111111110010";          when"1000"=>q<="0100000000010010";          when"1001"=>q<="0010000000011010";          when"1010"=>q<="0001111111010110";         when"1011"=>q<="0010000000010010";          when"1100"=>q<="0010000000010010";          when"1101"=>q<="0100111111111011";          when"1110"=>q<="1000000000010010";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 50=>
        case sel is
          when"0000"=>q<="0001000000001000";         when"0001"=>q<="1000100000001000";          when"0010"=>q<="1000010000001000";          when"0011"=>q<="0100001100001000";          when"0100"=>q<="0100000011001000";          when"0101"=>q<="0010000101111111";          when"0110"=>q<="0010001001001000";          when"0111"=>q<="0001010001001000";          when"1000"=>q<="0000100001001000";          when"1001"=>q<="0001010001001000";          when"1010"=>q<="0010001101001000";          when"1011"=>q<="0010000011001000";          when"1100"=>q<="0100000000001000";          when"1101"=>q<="1100000000001100";          when"1110"=>q<="0100000000001000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case;
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 51=>
        case sel is
          when"0000"=>q<="0000000001000000";          when"0001"=>q<="0000000001000010";          when"0010"=>q<="0111111111001100";          when"0011"=>q<="0010000000010000";          when"0100"=>q<="0101000000001100";          when"0101"=>q<="0100000000000100";          when"0110"=>q<="0111111111100100";          when"0111"=>q<="0100100100100100";          when"1000"=>q<="0100100100100101";         when"1001"=>q<="0100100100100110";          when"1010"=>q<="0100100100100100";          when"1011"=>q<="0100100100100100";          when"1100"=>q<="0111111111100100";          when"1101"=>q<="0100000000010100";          when"1110"=>q<="0100000000001100";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<2 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 52=>
        case sel is
        when"0000"=>q<="0010000001000000";          when"0001"=>q<="0110000001000000";          when"0010"=>q<="0011111111111110";          when"0011"=>q<="0001000001000000";          when"0100"=>q<="0001000001000000";          when"0101"=>q<="0000000010000000";          when"0110"=>q<="0011111111111100";          when"0111"=>q<="0100000001000000";         when"1000"=>q<="0100000001000000";          when"1001"=>q<="0101111111111111";          when"1010"=>q<="0100010000100000";          when"1011"=>q<="0100100000100000";          when"1100"=>q<="0100011111110000";          when"1101"=>q<="0100000000100000";          when"1110"=>q<="0111000000000000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
       when 53=>
        case sel is
          when"0000"=>q<="0100000000000000";          when"0001"=>q<="0100000000000000";          when"0010"=>q<="0010000001000000";          when"0011"=>q<="0010000000100000";          when"0100"=>q<="0001000000011000";          when"0101"=>q<="0000100000000111";          when"0110"=>q<="0000010000000100";          when"0111"=>q<="0000001100000100";          when"1000"=>q<="0000000011100100";          when"1001"=>q<="0000001100011110";          when"1010"=>q<="0000110000000100";         when"1011"=>q<="0001000000000000";          when"1100"=>q<="0010000000000000";          when"1101"=>q<="0110000000000000";          when"1110"=>q<="0010000000000000";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 54=>
        case sel is
    when"0000"=>q<="1000000001000000";         when"0001"=>q<="1000000001000010";          when"0010"=>q<="0100000001000010";          when"0011"=>q<="0010000001000010";          when"0100"=>q<="0001000001000010";         when"0101"=>q<="0000110001000010";          when"0110"=>q<="0000001101000010";          when"0111"=>q<="0000000011111110";          when"1000"=>q<="0000001101000010";          when"1001"=>q<="0000110001000010";          when"1010"=>q<="0001000001000010";          when"1011"=>q<="0010000001000010";          when"1100"=>q<="0100000001000011";          when"1101"=>q<="1100000001100010";          when"1110"=>q<="0100000001000010";          when"1111"=>q<="0000000000000000";
          when others=>null;
        end case; 
          if cnt2<1 then
                      cnt2:=cnt2+1;
                  else
                    cnt2:=0; 
                  end if; 
       when 55=>
        case sel is
          when"0000"=>q<="0000000010000000";          when"0001"=>q<="0000000010000000";         when"0010"=>q<="0000000010000000";          when"0011"=>q<="0000000010000000";          when"0100"=>q<="1111111111111111";