实现扫频率的功能，调试成功，能够很准确的扫描频率，欢迎大家使用-To achieve the function of the frequency sweep, debugging success, can be very accurate scanning frequency, welcome to use

Top Level VHDL Code -- simulate the relatively slow progress of an elevator car by dividing the -- clock down by an outrageously high number and scanning the car registers for -- an elevator s next -- (normally the signals used below wo