基于MC8051内核的便携幅频特性测试仪设计

Design of portable frequency characteristics test instrument based on MC8051 IP core

为满足实际工程应用的需要,研制了以嵌入式MC8051内核为核心技术的便携式幅频特性测试仪。系统以Xilinx公司生产的型号为XC3S400的FPGA芯片为硬件处理核心,以MC8051内核作为用户交互界面设计的控制核心。采用"正弦查找表IP核+D/A"的方式实现DDS技术并产生系统扫频信号,以异步FIFO作为FPGA与MC8051内核之间数据传输的缓存模块,同时采用TFT彩屏液晶进行显示界面设计。

In order to satisfy the demand of actual project, a frequency characteristics test instrument is designed in this paper, which adopts embedded MC8051 IP core as its core technology. The controller uses FPGA chip as its hardware core, which is a product of Xilinx Corporation and the model is XC3S400, and embedded MC8051 IP core is used as control kernel of the user interface design. The DDS technique is realized by the method of ＂Sine/Cosine IP core＋D/A＂ and generates the sweep signal. Asynchronous FIFO is introduced as a cache module for the data transmission between FPGA and 51 IP core, and TFT-LCD is used to design the display interface.