用VHDL语言设计分频器要求是将128赫兹的脉冲信号经过分频器分别产生64赫兹，32赫兹，16赫兹，8赫兹，4赫兹, 2赫兹，1赫兹，0.5赫兹的8种频率的信号,Divider design using VHDL language requirement will be 128 Hz pulses were generated through divider 64 Hz, 32 Hz, 16 Hz, 8 Hz, 4 Hz, 2 Hz, 1 Hz, 0.5 Hz frequency of the eight kinds of signal