基于TLV1578和TMS320VC5402的数据采集系统设计

摘要

在工业控制中,为了对数据进行实时处理,要求数据采集系统具有较高的速度和精度.在此设计了基于TMS320VC5402的快速数据采集系统,并详细介绍一种A/D接口设计方案.通过对目标信号进行采集,结果表明该系统具有易实现,高精度,高稳定性等特点.提供了系统设计的结构框图及实用的A/D接口原理图,叙述了系统软件的设计与实现过程,包括TLV1578的初始化和中断服务子程序等.最后从工程实践的角度给出了印刷电路板设计中需要注意的问题和相应的解决方案.%In order to do real-time processing in industrial control system, the dada acquisition systems with high speed and precision are required. A high-speed data acquisition system based on TMS320VC5402 is discussed and a kind of A/D interface design is introduced. The system is easy to realize and shows some features of high precision and stability. Structure diagram of the system and practical schematic diagram of A/D interface are provided in the paper. The software design and implementation, including the initialization of TLV1578 and interrupt service subroutines, are described also. In the end, the problems needing attention in PCB designs are put forward from the angle of engineering practice and give the solution.