运用8255，8253芯片设计交通灯控制程序，8255的三个口分别控制红黄绿灯，8253控制变换时间-8255,8253 chip design to use the traffic light control procedures, 8255, respectively, to control the mouth of the three yellow green, 8253 Transform time control

微型计算机课程设计，通过8253、8255A与8259A芯片实现模拟交通灯-Micro-computer curriculum design, 8253,8255 A through 8259A chip simulation with traffic lights

通过8253、8255、8259实现交通灯控制管理。-8253,8255,8259 achieved through the traffic light control and management.

⒈ 了解交通灯管理的基本工作原理 ⒉ 熟悉8259中断控制器的工作原理和应用编程 ⒊ 熟悉8255并行接口的各种工作方式和应用 ⒋ 熟悉8253计数器/定时器的工作方式及应用编程，掌握利用软硬件相结 合定时的方法 ⒌ 掌握多位LED显示问题的解决 -But understand the basic principle of management of traffic The 8259 interrupt controller with the working princi