PSHLY-B回路電阻測試儀介紹
上傳時間: 2013-11-05
上傳用戶:木子葉1
針對目前使用的RS232接口數字化B超鍵盤存在PC主機啟動時不能設置BIOS,提出一種PS2鍵盤的設計方法。基于W78E052D單片機,采用8通道串行A/D轉換器設計了8個TGC電位器信息采集電路,電位器位置信息以鍵盤掃描碼序列形式發送,正交編碼器信號通過XC9536XL轉換為單片機可接收的中斷信號,軟件接收到中斷信息后等效處理成按鍵。結果表明,在滿足開機可設置BIOS同時,又可實現超聲特有功能,不需要專門設計驅動程序,接口簡單,成本低。 Abstract: Aiming at the problem of the digital ultrasonic diagnostic imaging system keyboard with RS232 interface currently used couldn?蒺t set the BIOS when the PC boot, this paper proposed a design method of PS2 keyboards. Based on W78E052D microcontroller,designed eight TGC potentiometers information acquisition circuit with 8-channel serial A/D converter, potentiometer position information sent out with keyboard scan code sequentially.The control circuit based on XC9536 CPLD is used for converting the mechanical actions of the encoders into the signals that can be identified by the MCU, software received interrupt information and equivalently treatmented as key. The results show that the BIOS can be set to meet the boot, ultrasound specific functionality can be achieved at the same time, it does not require specially designed driver,the interface is simple and low cost.
上傳時間: 2013-10-10
上傳用戶:asdfasdfd
摘要:本文詳細敘述了基于FPGA及單片機K實現時碼終端系統的設計方法,該系統可用于對國際通用時間格式碼IRIG碼(簡稱B碼)的解調,以及產生各種采樣、同步頻率信號,也可作為其它系統的時基和采樣、同步信號的基準。關鍵詞:單片機;IRIG-B格式碼;FPGA;解調;控制;接口
上傳時間: 2013-12-16
上傳用戶:CSUSheep
中文版詳情瀏覽:http://www.elecfans.com/emb/fpga/20130715324029.html Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. Some of the UltraScale architecture breakthroughs include: • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets • Greatly enhanced DSP and packet handling The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.
標簽: UltraScale Xilinx 架構
上傳時間: 2013-11-13
上傳用戶:瓦力瓦力hong
fpga
上傳時間: 2013-12-19
上傳用戶:wangrong
使用功能強大的FPGA來實現一種DDR2 SDRAM存儲器的用戶接口。該用戶接口是基于XILINX公司出產的DDR2 SDRAM的存儲控制器,由于該公司出產的這種存儲控制器具有很高的效率,使用也很廣泛,可知本設計具有很大的使用前景。本設計通過采用多路高速率數據讀寫操作仿真驗證,可知其完全可以滿足時序要求,由綜合結果可知其使用邏輯資源很少,運行速率很高,基本可以滿足所有設計需要。
上傳時間: 2013-11-07
上傳用戶:GavinNeko
首先介紹了采用直接數字頻率合成(DDS)技術的正弦信號發生器的基本原理和采用FPGA實現DDS信號發生器的基本方法,然后結合DDS的原理分析了采用DDS方法實現的正弦信號發生器的優缺點,其中重點分析了幅度量化雜散產生的誤差及其原因,最后針對DDS原理上存在的幅度量化雜散,利用FPGA時鐘頻率可調的特點,重點提出了基于FPGA實現的DDS正弦信號發生器的兩種改進方法,經過MATLAB仿真驗證,改進方法較好的抑制了幅度量化雜散,減小了誤差。
上傳時間: 2013-10-09
上傳用戶:ssj927211
電子發燒友網核心提示:Altera公司昨日宣布,在業界率先在28 nm FPGA器件上成功測試了復數高性能浮點數字信號處理(DSP)設計。獨立技術分析公司Berkeley設計技術有限公司(BDTI)驗證了能夠在 Altera Stratix V和Arria V 28 nm FPGA開發套件上簡單方便的高效實現Altera浮點DSP設計流程,同時驗證了要求較高的浮點DSP應用的性能。本文是BDTI完整的FPGA浮點DSP分析報告。 Altera的浮點DSP設計流程經過規劃,能夠快速適應可參數賦值接口的設計更改,其工作環境包括來自MathWorks的MATLAB和 Simulink,以及Altera的DSP Builder高級模塊庫,支持FPGA設計人員比傳統HDL設計更迅速的實現并驗證復數浮點算法。這一設計流程非常適合設計人員在應用中采用高性能 DSP,這些應用包括,雷達、無線基站、工業自動化、儀表和醫療圖像等。
上傳時間: 2014-12-28
上傳用戶:18888888888
FPGA技巧Xilinx
上傳時間: 2013-10-13
上傳用戶:yanqie
本文主要介紹Cyclone V FPGA的一個很明顯的特性,也可以說是一個很大的優勢,即:采用低功耗28nm FPGA減少總系統成本
上傳時間: 2013-10-26
上傳用戶:huxiao341000