描述
3.5PCI9054操控部分的设计
通过编写PCI9054专用的驱动和应用软件,实现由计算机通过CPCI总线操控存储板卡。在应用软件中,对Flash读写或者擦除等命令自定义为对CPCI总线发送特定的数据。而在FPGA内部根据PCI9054发送的局部端数据线上的特定数据判断是何种操作,并执行相应操作。FPGA和PCI9054通信的主要信号线有LHOLD、LHOLDA、READY、ADS、ADDR、DATA,利用这些信号线可以实现PCI9054局部端和FPGA握手。将数据写到计算机中。在PCI9054专用的驱动和应用软件中,利用DMA方式读取Flash,读取速度可提高至1.3MHz×16bit。
4结束语
本设计采用流水、并行处理技术,利用FPGA内部嵌入的存储块设计一组高速数据缓冲区,使得多个慢速的存储器件并行工作,令系统内外部数据的速率匹配,避免了外置高速缓存,简化了硬件电路,且极大地提高了存储数据的速率。大容量高密度闪存器件可使单片存储板容量高达128Gbit。在FP-GA内部设计中,建立Flash无效块信息列表,并在此基础上对Flash进行读、写、擦除及重建无效块信息等操作。使系统具有集成度高、灵活性好、可移植性强、速度快等特点。通过CPCI总线采取DMA方式读取,极大地提高了读取速度。当接收到的数据带宽很大,速度很高时,可将存储板并联起来,多个存储板级联可满足更大的存储容量需求,也可将级联并联二者结合起来以满足不同系统的要求。整个系统基于CPCI工控机箱,更适合于野外的工作环境,并能及时保存、分析数据。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。
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