目 录
1．方案比较与选择...............................................................................................................................................1
方案一； 基于 51 单片机设计的数字秒表..........................................................................................................1
方案二： 基于 FPGA 的数字秒表的设计............................................................................................................3
2.底层文件仿真与分析................................................................................................................................ ..............7
2.1 消抖模块...........................................................................................................................................................7
2.2 时钟分频模块...................................................................................................................................................8
2.3 控制模块的时序仿真.......................................................................................................................................8
3．顶层文件仿真与分析........................................................................................................................... ..............12
4.硬件验证分析.......................................................................................................................................... ..............13
5.课程设计心得.......................................................................................................................................... ..............15
ABSTRACT............................................................................................................................................ .................16
参考文献..................................................................................................................................................... ..............17
附录（源代码）：..................................................................................................................................... ..............18
顶层文件:..............................................................................................................................................................18
分频模块：...........................................................................................................................................................20
消抖顶层模块：...................................................................................................................................................21
消抖：
...............................................................................................................................................................22
控制模块：...........................................................................................................................................................23
计时顶层模块：...................................................................................................................................................24
计小秒：
...........................................................................................................................................................26
计秒：
...............................................................................................................................................................27
计分：
...............................................................................................................................................................28
译码顶层模块：...................................................................................................................................................29
译码：
...............................................................................................................................................................30
显示模块：...........................................................................................................................................................31
