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本文从疲劳试验的要求出发阐述了微型计算机的选型和硬件接口的设计。 TRS—80微型计算机系统,在同类产品中具有优越的硬件结构,好的性能价格比,可靠、稳定,软件较丰富。该系统配置的BASiCⅡ语言简单易懂,编制程序容易可靠,还专门设置了供工业控制用的特殊函数和特殊语句,以确保课题的可行、可靠、经济和一定的先进性。 目前,大、中规模集成电路中可编程接口芯片已广泛用于微型计算机的控制中,文中阐述了以infel公司生产的可编程并行I/O接口芯片8255为核心的接口电路的设计和接口电路工作原理。
In this paper, the requirements of fatigue test are described based on microcomputer selection and hardware interface design. TRS-80 microcomputer system, in similar products with superior hardware structure, good performance and low cost, reliable, stable, rich software. The system configuration BASiC Ⅱ language easy to understand, easy and reliable preparation of the program, but also specifically set up for industrial control with special functions and special statements to ensure that the subject is feasible, reliable, economical and some advanced. Currently, large and medium-scale integrated circuit programmable interface chip has been widely used in micro-computer control, the article describes the infel company’s programmable parallel I / O interface chip 8255 as the core of the interface circuit design and interface circuit working principle.