基于FPGA的Intel-8080总线实现研究

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高速信号处理系统基本围绕DSP与FPGA设计实现解决方案,FPGA具有并行速度高、处理能力强、扩展性强、可用于ASIC设计的优势,然而FPGA硬件解决方案在实现低速外设、用户界面、用户交互方面相较于嵌入式软件解决方案开发周期长、开发人员少、公共开发资源少。因此,基于FPGA与MCU的联合解决方案能有效集合上述优点,具有良好的应用前景,但是需要一种FPGA与MCU的稳定、通用的通信接口设计。文章提出的MCS-8051系列单片机是广泛使用的MCU平台,内部集成有Intel-8080总线控制器,故FPGA可以设计一种兼容Intel-8080总线协议的通信接口以实现MCU与FPGA的通信。

The high-speed signal processing system basically revolves around the design and implementation of DSP and FPGA. FPGA has the advantages of high parallel speed, strong processing ability, strong expansibility and can be used in ASIC design. However, FPGA hardware solution has the advantages of long development cycle, fewer developers and fewer public development resources than embedded software solution in realizing low speed peripherals, user interface and user interaction. Therefore, the joint solution based on FPGA and MCU can effectively combine the above advantages and has a good application prospect, but it needs a stable and general communication interface design between FPGA and MCU. The MCS-8051 series single-chip microcomputer is a widely used MCU platform, and the inside is integrated with the Intel-8080 bus controller, so the FPGA can design a communication interface compatible with the Intel-8080 bus protocol to realize the communication between the MCU and the FPGA.