共查询到18条相似文献,搜索用时 93 毫秒
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VME(Versa Module Eurocard,是一种计算机结构总线标准)bus的主模块传输操作和中断处理,特采用桥接芯片VIC068A,文中设计了DSP(Data Sign Process)与VME bus接口界面电路,经测试此电路可以实现DSP与Motorola 68K系列处理器的通讯,解决了部分与其他芯片不兼容问题。 相似文献
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基于FPGA和MCU的CAN—VME总线转换设计 总被引:1,自引:1,他引:0
为了扩展VME总线和CAN总线的应用范围,充分利用两种总线的不同传输特点,采用了模块设计方法,提出一种基于FPGA和MCU的总线转换方案。该方案给出了FPGA与上位VME总线部分的VME总线接口设计,利用MCU控制CPLD扩展的多通道CAN节点完成CAN总线部分的设计,还给出软件实现上的重点、难点和流程。实现了两种不同总线的转换,满足了工业环境对两种总线混合使用的要求。 相似文献
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基于Tsi148的PCI—VME总线接口设计 总被引:1,自引:0,他引:1
VME总线是一种开放式工业计算机总线,在VME总线多主处理计算机系统中,通常需要进行PCI总线与VME总线接口互连。这里分析了业界最先进的PCI—VME总线互连芯片Tsil48的原理与功能,介绍Tsi148在VME总线智能模块中进行PCI—VME接口互连的方法,给出通过本地PCI总线接口进行Tsi148初始化和VME系统配置的软件流程。实践表明,采用Tsi148进行PCI—VME互连设计,实现了VME总线的高速数据传输和控制功能,并在实际应用中取得了良好的效果。 相似文献
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针对自组网物理层通信系统的要求,设计并且实现了DSP模块的中断响应系统和总线传输系统.该中断系统采取DSP主动模式,能够在第一时间完成数据交互,使得DSP有足够时间对数据进行处理,较好地满足了系统的要求.通过对于DSP模块中的EMIF和EDMA模块的合理配置,成功完成了总线数据传输. 相似文献
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在多DSP信号处理系统的设计过程中,开发基于标准总线的信号处理模板已经成主流设计方案。这种设计方案的难点就是局部总线到标准总线的时序转换比较复杂。在详细介绍VME总线功能特点的基础上,给出了一种在FPGA控制下实现的工业控制计算机通过VME总线与多DSP信号处理板局部总线进行通信的接口设计方案。FPGA的控制功能采用状态机工作方式实现。 相似文献
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Wang Min Wu Shunjun Su Tao 《电子科学学刊(英文版)》2005,22(6):632-639
Targeting at the high expense and inflexibility to realize VMEbus bridge controller by professional Integrated Circuit (IC), this paper presents a scheme of adopting CPLD/FPGA (Complicated Programmable Logic Device/Field Programmable Gate Array) to design bridge controller between VMEbus and local bus. SHARC DSP (Digital Signal Processor) bus is an example. It has functions of nearly entire master/slave interface of VMEbus, and can act as DMA (Direct Memory Access) controller and perform block transfer in DMA or master processor initiative way without length limit. External circuit of the design is very simple. In comparison with special ICs, it has high performance to price ratio and can be easily applied to local buses of other processors with quite a little modification. 相似文献
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对PowerPC微处理器应用于VME总线系统所涉及的问题进行了分析,给出了最小系统的设计方案,重点阐述了CPU与接口器件间的适配逻辑的设计原理.从而实现了PowerPC处理器对VME总线的访问和控制。 相似文献
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《Electron Devices, IEEE Transactions on》1979,26(10):1482-1490
A series of fast-acting and repetitively operable bimodal gas discharge switches capable of both the initiation and the interruption of high pulse currents at high-voltage levels has been designed, built, and tested. Based on hydrogen thyratron technology, these switches retain most of the characteristics of thyratrons when switching from the open to the closed state. In addition, the interruption of high currents against high source voltages is achieved when an externally generated, pulsed magnetic field is transversely applied to the current by means of a plasma-field interaction region built into the device. The interruption process is rapid (typically requiring less than 10 μs), complete (current is reduced to zero), and permanent (the current in the device does not restrike even when the field pulse terminates). In general, operation at lower voltages allows the interruption of higher currents for a given magnetic field energy. Typical data are the interruption of 1000 A against 15 kV with a field energy of 8 J, and 100 A against 50 kV with a field energy of 33 J. The theory, design, and construction of such switches are described, and the results of various parametric studies are discussed. It is shown that the voltage level of the interruption is the dominant factor affecting both the conduction and interruption characteristics of the device. A unique interaction region geometry that markedly reduces magnetic field energy requirements is described. It is shown that with proper interaction region design, the voltage drop across the switch during conduction is only about 2 percent of the applied voltage for a switch capable of opening against 50 kV. The device is scalable to various voltage and current levels, and has an inherent repetition rate capability of the order of 10 kHz. 相似文献