3.4 数字频率计的设计方法............................................................................................18
第四章 频率计的硬件设计过程.............................................................................................23
4.1 电源部分....................................................................................................................23
4.2 整形部分....................................................................................................................23
4.3 CPLD 芯片 .................................................................................................................24
4.4 显示部分....................................................................................................................25
4.5 报警部分....................................................................................................................27
4.6 键盘部分....................................................................................................................28
4.7 晶振部分....................................................................................................................28
第五章 频率计的软件设计过程.............................................................................................29
5.1 基于直接测频法设计部分........................................................................................29
5.1.1 分频器模块.....................................................................................................29
5.1.2 闸门定时模块.................................................................................................33
5.1.3 测频控制信号发生器模块..............................................................................34
5.1.4 计数器模块......................................................................................................37
5.1.5 锁存器模块......................................................................................................39
5.1.6 显示模块..........................................................................................................40
5.2 基于等精度测频法设计部分....................................................................................41
5.2.1 校正模块..........................................................................................................41
5.2.2 分频器模块......................................................................................................41
5.2.3 D 触发器模块..................................................................................................42
5.2.4 除法器模块......................................................................................................43
5.2.5 乘法器模块......................................................................................................44
5.2.6 高、低位转换模块..........................................................................................44
5.3 模块下载....................................................................................................................45
第六章 调试.............................................................................................................................47
6.1 硬件调试....................................................................................................................47
6.2 软件调试....................................................................................................................48
6.3 结论..........................................................................................................................50
参考文献...................................................................................................................................51
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