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This application note covers the design considerations of a system using the performance features of the LogiCORE™ IP Advanced eXtensible Interface (AXI) Interconnect core. The design focuses on high system throughput through the AXI Interconnect core with F MAX and area optimizations in certain portions of the design. The design uses five AXI video direct memory access (VDMA) engines to simultaneously move 10 streams (five transmit video streams and five receive video streams), each in 1920 x 1080p format, 60 Hz refresh rate, and up to 32 data bits per pixel. Each VDMA is driven from a video test pattern generator (TPG) with a video timing controller (VTC) block to set up the necessary video timing signals. Data read by each AXI VDMA is sent to a common on-screen display (OSD) core capable of multiplexing or overlaying multiple video streams to a single output video stream. The output of the OSD core drives the DVI video display interface on the board. Performance monitor blocks are added to capture performance data. All 10 video streams moved by the AXI VDMA blocks are buffered through a shared DDR3 SDRAM memory and are controlled by a MicroBlaze™ processor. The reference system is targeted for the Virtex-6 XC6VLX240TFF1156-1 FPGA on the Xilinx® ML605 Rev D evaluation board
標(biāo)簽： XAPP 740 AXI 互聯(lián)
上傳時(shí)間： 2013-11-23
上傳用戶：shen_dafa
為了提高直接轉(zhuǎn)矩控制（DTC）系統(tǒng)定子磁鏈估計(jì)精度，降低電流、電壓測(cè)量的隨機(jī)誤差，提出了一種基于擴(kuò)展卡爾曼濾波（EKF）實(shí)現(xiàn)異步電機(jī)轉(zhuǎn)子位置和速度估計(jì)的方法。擴(kuò)展卡爾曼濾波器是建立在基于旋轉(zhuǎn)坐標(biāo)系下由定子電流、電壓、轉(zhuǎn)子轉(zhuǎn)速和其它電機(jī)參量所構(gòu)成的電機(jī)模型上，將定子電流、定子磁鏈、轉(zhuǎn)速和轉(zhuǎn)子角位置作為狀態(tài)變量，定子電壓為輸入變量，定子電流為輸出變量，通過對(duì)磁鏈和轉(zhuǎn)速的閉環(huán)控制提高定子磁鏈的估計(jì)精度，實(shí)現(xiàn)了異步電機(jī)的無速度傳感器直接轉(zhuǎn)矩控制策略，仿真結(jié)果驗(yàn)證了該方法的可行性,提高了直接轉(zhuǎn)矩的控制性能。 Abstract: In order to improve the Direct Torque Control（DTC） system of stator flux estimation accuracy and reduce the current， voltage measurement of random error， a novel method to estimate the speed and rotor position of asynchronous motor based on extended Kalman filter was introduced. EKF was based on d-p axis motor and other motor parameters （state vector: stator current， stator flux linkage， rotor angular speed and position； input: stator voltage； output: staror current). EKF was designed for stator flux and rotor speed estimation in close-loop control. It can improve the estimated accuracy of stator flux. It is possible to estimate the speed and rotor position and implement asynchronous motor drives without position and speed sensors. The simulation results show it is efficient and improves the control performance.
標(biāo)簽： EKF 異步電機(jī) 直接轉(zhuǎn)矩 控制系統(tǒng)
上傳時(shí)間： 2015-01-02
上傳用戶：qingdou
Semiconductor memory, card readers, microprocessors,disc drives, piezoelectric devices and digitally based systemsfurnish transient loads that a voltage regulator mustservice. Ideally, regulator output is invariant during a loadtransient. In practice, some variation is encountered andbecomes problematic if allowable operating voltage tolerancesare exceeded. This mandates testing the regulatorand its associated support components to verify desiredperformance under transient loading conditions. Variousmethods are employable to generate transient loads, allowingobservation of regulator response
標(biāo)簽： 如何測(cè)試 穩(wěn)壓器 瞬態(tài)響應(yīng) 負(fù)載
上傳時(shí)間： 2013-11-21
上傳用戶：semi1981
本程序是一個(gè)在嵌入式下通過鍵盤控制復(fù)制文件，并在嵌lcd（microwindows）屏上顯示的演示小程序。
上傳時(shí)間： 2015-08-03
上傳用戶：bjgaofei
The sfloppy sample is a super floppy driver that resides in the directory \\Ntddk\Src\Storage\sfloppy. It is a class driver for Super Floppy disk drives. It sits a level above the port driver (ATAPI, USB, etc) in the driver stack, and brokers communication between the application level and the port driver. The floppy driver takes requests from filesystem drivers and then sends the appropriate SCSI_REQUEST_BLOCK (SRB) to the port driver. It is compatible with x86 and IA64 platforms.
標(biāo)簽： NtddkSrcStoragesfloppy directory sfloppy resides
上傳時(shí)間： 2015-12-04
上傳用戶：84425894
It may analyze the window structure, the advancement and the window news, has the very greatly auxiliary function to the development work. When we need to study some object, so long as assigns out its search window, drives the detector the indicator to assign the window/to control on to release then. Under, the author on and everybody same place, makes with VC to belong to own Spy++.
標(biāo)簽： the window advancement structure
上傳時(shí)間： 2013-12-31
上傳用戶：ghostparker
現(xiàn)在Sigma Design的平臺(tái)越來越流行，使用的人也越來越多，本教程教你如何將microwindows圖形系統(tǒng)移植到EM8622平臺(tái)上。
上傳時(shí)間： 2016-07-12
上傳用戶：klin3139
給出了一種基于$3C2410嵌入式SoC的網(wǎng)絡(luò)視頻會(huì)議終端的實(shí)現(xiàn)方案，在具體分析了軟件測(cè)試中出現(xiàn)的H．263視頻編解碼及MicroWindows視頻顯示效率低的問題后，通過對(duì)H．263編解碼器中的DCT分塊變換、運(yùn)動(dòng)估計(jì)算法及GUI的FrameBuffer視頻顯示，進(jìn)行了有針對(duì)性的改進(jìn)工作，使軟件充分利用了嵌入式S3C-2410的硬件資源，從而滿足了嵌入式網(wǎng)絡(luò)終端實(shí)時(shí)視頻通信的實(shí)用需要．
標(biāo)簽： 2410 SoC 嵌入式 實(shí)現(xiàn)方案
上傳時(shí)間： 2013-12-02
上傳用戶：cxl274287265
開源備份軟件源碼 AMANDA, the Advanced Maryland Automatic Network Disk Archiver, is a backup system that allows the administrator to set up a single master backup server to back up multiple hosts over network to tape drives/changers or disks or optical media. Amanda uses native dump and/or GNU tar facilities and can back up a large number of workstations running multiple versions of Unix. Amanda uses Samba, Cygwin or a native Windows client to back up Microsoft Windows desktops and servers
標(biāo)簽： Automatic Advanced Maryland Archiver
上傳時(shí)間： 2017-01-13
上傳用戶：xc216
this program has many parts and fully working, based on MCS51. Hand made PWM and wave forms for dimmer like output. it also drives ISD audio chip.
標(biāo)簽： and program working fully
上傳時(shí)間： 2017-07-11
上傳用戶：xc216
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