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用Verilog HDL语言实现FPGA的频率等精度测量。（已经过验证）-Using Verilog HDL language, such as FPGA frequency measurement accuracy. (Has already been verified)
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利用FPGA设计的可以自适应的频率计，里面有详细的文档介绍。-FPGA designs can use adaptive frequency counter, which document describes in detail.
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Clk50M_div_1HZ，调试已通过，采用计数器分频
此实验采用计数器，将板载的50MHz时钟源分频为1Hz，分频的结果以LED灯的形式显示。下载电路至FPGA后，会发现LED0会以1Hz的频率闪动。-Clk50M_div_1HZ, using counter this study, frequency counter, onboard 50MHz clock frequency of 1Hz, frequency results in the form of LED lights di
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本设计是基于FPGA控制的PWM信号输出系统，以EP3C5E144C8芯片为核心，通过参考信号和输入信号在计数器中的比较来实现占空比、频率可调的脉冲宽度调制信号-The design is FPGA-based control of the PWM signal output system, to EP3C5E144C8 chip as the core, to achieve adjustable duty cycle, frequency, pulse width modulation si
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FPGA设计中，实现基准时钟的分频模块，该模块是将外围电路中所提供的50MHZ将其分频，对时钟模块作用后产生一秒一秒的时钟信号，另外对显示模块的计数器提供时钟实现显示模块的扫描功能。(The design of FPGA, the reference clock frequency module, this module is provided in the peripheral circuit of the 50MHZ frequency, the clock module generates
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