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本文介绍MCS-51单片机与双端口RAM相结合而构成的高精度高速度数据采集系统。该系统特点在于数据的传送既不需要经过CPU“中转”,也不需要DMA方式,这样既充分发挥了单片机的处理、控制功能,又解决了单片机的I/O口无三态浮空与系统测控、数据采集和处理要同步的矛盾。通过两个实例测试表明,该系统性能价格比高、应用灵活、结构简单,有着良好的应用前景。
This article describes the MCS-51 single-chip dual-port RAM and the combination of high-precision high-speed data acquisition system. The system is characterized by data transmission without the need to go through the CPU “transfer”, do not need DMA mode, so that not only give full play to the microcontroller processing and control functions, but also to solve the microcontroller I / O port without tri-state floating and the system Measurement and control, data acquisition and processing should be synchronized contradictions. The test by two examples shows that the system has high cost performance, flexible application, simple structure and good application prospect.