多功能、低成本计时模块的设计与实现

Design and Implementation of Multi-functional,Low-cost Timing Module

计时模块以低功耗微控制器P89LV51RD2为控制核心,主架构采用外部时基与内部定时器相结合的方法,既满足了长时间稳定计时的需要,又可以实现短时间、高精度的计时,通过矩阵键盘设置计时初值,由LCD显示各种信息,配合串行存储器实现了数据的记录、存储和恢复。通过键值的分时复用,利用有限的按键实现了五种计时模式的初值设置、启动/停止、数据的记录、存储和恢复以及数据的翻页查询等功能。

The timing module using low power-cost P89LV51RD2 as the core of control,whose main architecture uses an external time base and the internal timer,not only meet the need for long-term and stability timing,but also realize short-term,high-precision timing,using Matrix keyboard to set the initial time,using LCD to display all kinds of information,through the serial memory to achieve data recording,storage and recovery.The initial value set of the five timing mode,start/stop,data recording,storage and recovery,the next page of data queries and other functions come true by using the limited keys,through key-value time division multiplexing.