基于FPGA的多功能数据采集卡控制器的实现

Implementation of Controller of Multi-function Data Acquisition Card Based on FPGA

针对数据采集卡控制器的控制要求的复杂性问题,给出了基于EPGA器件实现采集卡控制器的方法。介绍了多功能采集卡的功能和结构,分析了采集卡对控制时序的要求, 指明了潜在的总线冲突。给出控制器逻辑框图及各个功能模块的实现方法,说明了用时分复用的方法解决总线冲突的办法。通过逻辑仿真软件和硬件测试,验证了逻辑实现的可行性。采用FPGA实现采集卡的控制器.提高了集成度,增加了工作的可靠性,很好地配合了其他器件的时序要求,实现了采集卡的各项功能。

To meet the control requirements of data acquisition card (DAC), a method of DAC controller based on FPGA was put forward. The structure of multi-function DAC was described; timing requirements were analyzed and latent conflicts were pointed out. The logic construction of controller was given and each module was explained, especially the time-division method was introduced to resolve forward conflicts. The feasibility of logic implementation was verified through both logic software simulation and hardware test. The FPGA-based controller implementation enhanced the integration and reliability, well worked together with other chips and accomplished each function of DAC.