基于FPGA(Verilog)的数字式秒表设计

1基于FPGA的数字式秒表草鱼设计任务及要求草鱼草鱼草鱼草鱼草鱼秒表由于其计时精确，鲤鱼分辨率高（001草鱼秒），鲤鱼在各种竞技场所得到了广泛的应用，鲤鱼本次设计的任务就是设计一个基于草鱼FPGA草鱼的数字式秒表。草鱼草鱼1、PORK基本要求PORK草鱼（1）性能指标PORK草鱼草鱼草鱼草鱼草鱼草鱼秒表的分辨率为草鱼001草鱼秒，鲤鱼最长计时时间为草鱼9999草鱼秒；PORK草鱼（2）设置启/停开关和复位开关（计数控制器）PORK草鱼草鱼草鱼草鱼草鱼草鱼启/停开关草鱼S1草鱼的使用方法与传统的机械计时器相同，鲤鱼即按一下启/停开关，鲤鱼启动计时器开始计时，鲤鱼再按一下启/停开关计时终止。草鱼复位开关草鱼S2草鱼用来使计时器清草鱼0，鲤鱼复位开关可以在任何情况下使用，鲤鱼即使在计时过程中，鲤鱼只要按一下复位开关，鲤鱼计时进程应立即终止，鲤鱼并对计时器清零。草鱼（开关按下为草鱼0，鲤鱼弹起为草鱼1）。草鱼草鱼秒表的计时基准信号PORK草鱼草鱼草鱼草鱼草鱼草鱼以周期为草鱼001草鱼秒（频率草鱼100HZ）的计时脉冲作为一个比较精准的计时基准信号输入到001草鱼秒位计数器的时钟端；PORK在设计中采用分频器把草鱼1000HZ草鱼的时钟信号转换为草鱼100HZ草鱼的计时基准信号，鲤鱼其分频系数为草鱼10。草鱼草鱼数码管动态显示PORK草鱼草鱼草鱼草鱼草鱼草鱼七段数码管采用动态扫描的方式显示，鲤鱼扫描需要一个比较高频率的信号，鲤鱼本次设计选用草鱼1000HZ草鱼。草鱼为了得到草鱼1000HZ草鱼信号，鲤鱼必须对输入的时钟信号草鱼50MHZ草鱼进行分频。草鱼显示模块共用草鱼11草鱼个管脚，鲤鱼其中草鱼8草鱼个用于连接草鱼8草鱼个数码管的七段草鱼LED，鲤鱼还有草鱼3草鱼个管脚用于选择点亮哪个数码管，鲤鱼每隔很短的一段时间草鱼8草鱼个数码管交替点亮，鲤鱼依次循环，鲤鱼动态显示，鲤鱼由于人眼的视觉残留，鲤鱼可以观察到连续的测量计数器的计数值。草鱼草鱼草鱼草鱼草鱼草鱼草鱼上电后，鲤鱼八个数码管中左边四个显示自己的学号后四位，鲤鱼在运行过程中一直不变；PORK右边四个显示计时时间，鲤鱼范围草鱼00009999，鲤鱼利用两个按钮草鱼S1、PORKS2草鱼控制计时。草鱼草鱼草鱼提高要求PORK草鱼草鱼草鱼草鱼加入小数点，鲤鱼计时数码管显示范围草鱼00009999。草鱼草鱼草鱼草鱼草鱼草鱼系统原理框图草鱼2草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼1000HZ草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼100HZ草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼50MHZ草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼1000HZ草鱼电路实现草鱼显示译码器数据选择器38译码器模8计数器位控，3位信号段控，8位信号5万分频器模10计数器10分频器控制器3草鱼功能模块草鱼分频器（以10分频器为例）草鱼（1）VERILOG草鱼HDL语言程序草鱼MODULE草鱼FP10草鱼CLK,草鱼OUT草鱼PORK草鱼INPUT草鱼CLKPORK草鱼OUTPUT草鱼OUTPORK草鱼REG草鱼OUTPORK草鱼REG草鱼30草鱼COUTPORK草鱼REG草鱼CLK_ENPORK草鱼INITIAL草鱼OUT草鱼4D5草鱼草鱼1D1草鱼草鱼1D0PORK草鱼4OUT4D9草鱼OUT1D1PORK草鱼ELSE草鱼6OUT1D0PORK草鱼END草鱼END草鱼END草鱼END草鱼/草鱼ASSIGN草鱼CQ草鱼草鱼LEDPORK草鱼/草鱼ENDMODULE草鱼草鱼草鱼草鱼草鱼（2）模块化电路草鱼草鱼草鱼草鱼草鱼草鱼草鱼（3）波形仿真草鱼由波形图可以看出，鲤鱼100HZ的脉冲源，鲤鱼模10计数器D3D0输出00001001，鲤鱼每10个脉冲进位位OUT输出一个单脉冲。草鱼草鱼数据选择器草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼草鱼（1）VERILOG草鱼HDL语言程序草鱼MODULE草鱼NUMCHOOSESEL,NUM4,NUM5,NUM6,NUM7,KPORK草鱼INPUT20SELPORK草鱼INPUT30NUM4PORK草鱼INPUT30NUM5PORK草鱼INPUT30NUM6PORK草鱼7INPUT30NUM7PORK草鱼OUTPUT草鱼REG30草鱼KPORK草鱼ALWAYS草鱼草鱼BEGIN草鱼CASESEL草鱼3B000草鱼K4D9草鱼OUT1D1PORK草鱼ELSE草鱼OUT1D0PORK草鱼草鱼可以看出，鲤鱼对于OUT进位输出，鲤鱼0到8时是