"基于FPGA的等精度频率计设计及实现"

Field Programmable Gate Array (FPGA) is currently one of the most popular programmable logic devices. IP core is a module that contains commonly used but complex functional blocks in digital circuits, designed as modifiable modules for users to directly call. As the scale of FPGAs continues to increase, the use of IP core is a growing trend. Traditional frequency measurement principles in frequency counters result in decreasing measurement accuracy as the frequency of the signal being measured decreases, leading to significant limitations in practical applications. In contrast, the design of an equi-accuracy frequency counter not only offers high measurement accuracy but also maintains a constant level of testing precision across the entire frequency range. This paper combines the advantages of FPGA and 8051 microcontrollers to realize the application of a 8051 IP core based on FPGA, designing an equi-accuracy frequency counter system. Keywords: FPGA, 8051 IP core, equi-accuracy frequency counter design.