基于SOPC技术的SPI核的实现

阐述何为SPI核,以16位A/D转换器ADS8361芯片为例,分析了其工作原理和特点,利用硬件逻辑资源完成A/D数据采集和处理的时序设计,并将其添加为SOPC组件;在NIOSⅡ系统中实现了A/D数据采集外设接口的定制,并对A/D数据采集结果进行了分析。

基于NiosⅡ的导引头电子舱信号群高速采集系统

导引头电子舱是导弹探测、跟踪目标的部件,是导弹系统的关键部分,因此电子舱产品使用前的调试和检测至关重要。介绍了一种基于Nios II的导引头电子舱信号群高速采集系统。该系统采用Cyclone II系列EP2C35芯片,以Nios II软核为核心处理器,完成了对A/D转换后的30路信号群的高速采集处理。与之前采用PCI总线方案相比,此方案简化了硬件电路、减小了设备体积、降低了成本,可以满足不同产品的各种逻辑电平、编码装定、参数预置及功能拓展升级的需求,提高了系统的可靠性和智能化分析处理实验数据的水平。

Investigation of Optimal Charcoal Concentration for Heterokaryon Formation of Rhizoctonia solani

Optimal charcoal concentrations were examined for tuff formation of SBIs （single-basidiospore isolates） obtained from Rhizoctonia solani AG-1 IC, AG-2-2 IV and AG-2-3, and SPIs （single-protoplast isolates） from AG-1 IA by using PDCA with different charcoal concentrations. The best charcoal concentration for SBIs from AG-1 IC was 0.5%, from AG-2-3 was 1%, and from AG-2-2 IV was 2%. The optimal concentration was 0% for SPIs from AG-1 IA. The optimal charcoal concentrations used for tuff formation between SBIs and between SPIs are quite varied, depending on the different AGs. The results of AFLP haplotypes suggest that tuff isolates formed between SBIs/SPIs are heterokaryon.