车用控制器数字量端口的可配置的实现

摘要

提出了一种基于MK66FX1M0VLQ18(主控芯片)和EMP570T114C5N(CPLD)的实现车用控制器数字量端口可配置性的设计方案.介绍了端口进行数字量输出时故障诊断电路原理以及软件实现方案.从CPLD和主控芯片角度分别介绍数字量端口功能可配置的实现过程,从而使所设计的车用控制器具备高度灵活的可配置.同时由于采用CPLD实现数字量端口的复用功能,降低了系统的主控芯片的负荷,提高了整个车用控制器工作效率.%In order to realize the digital ports' configurability of the ECU , we put forward a design based on the main control chip (MK66FX1M0VLQ18) and the extended chip (EMP570T114C5N (CPLD)). In the design, we introduce the way to diagnose the digital ports from the theory and soft-realization. To make the ECU has high flexibility, we show the realization of configurability of the digital ports from the main control chip and the extended chip. Besides because of the usage of the CPLD , we reduce the load of the main control chip and increase the work efficiency of the whole ECU.