關于FPGA流水線設計的論文 This work investigates the use of very deep pipelines for implementing circuits in FPGAs, where each pipeline stage is limited to a single FPGA logic element (LE). The architecture and VHDL design of a parameterized integer array multiplier is presented and also an IEEE 754 compliant 32-bit floating-point multiplier. We show how to write VHDL Cells that implement such approach, and how the array multiplier architecture was adapted. Synthesis and simulation were performed for Altera Apex20KE devices, although the VHDL code should be portable to other devices. For this family, a 16 bit integer multiplier achieves a frequency of 266MHz, while the floating point unit reaches 235MHz, performing 235 MFLOPS in an FPGA. Additional Cells are inserted to synchronize data, what imposes significant area penalties. This and other considerations to apply the technique in real designs are also addressed.
標簽: investigates implementing pipelines circuits
上傳時間: 2015-07-26
上傳用戶:CHINA526
ARM7硬件說明與開發 The ARM7 is a low-power, general purpose 32-bit RISC microprocessor macrocell for use in application or customer-specific integrated circuts (ASICs or CSICs). Its simple, elegant and fully static design is particularly suitable for cost and power-sensitive applications. The ARM7’s small die size makes it ideal for integrating into a larger custom chip that could also contain RAM, ROM, logic, DSP and other Cells.
標簽: ARM7 microprocessor low-power macrocell
上傳時間: 2013-12-17
上傳用戶:3到15
An Efficient and Effective Detailed Placement Algorithm Global Swap To identify a pair of Cells that can be swapped to reduce wirelength (others are fixed). 2. Vertical Swap Swap a cell with a nearby cell in the segment above or below. 3. Local Re-ordering Re-order consecutive Cells locally to reduce wirelength. 4. Single-Segment Clustering Place Cells optimally within a segment.
標簽: Algorithm Efficient Effective Placement
上傳時間: 2013-12-18
上傳用戶:ukuk
This MATLAB M-file implements the finite-difference time-domain solution of Maxwell s curl equations over a one-dimensional space lattice comprised of uniform grid Cells.
標簽: finite-difference time-domain implements equations
上傳時間: 2014-01-11
上傳用戶:270189020
Creating barcodes in Microsoft廬 Office has never been easier. With BarCodeWiz Toolbar you can add barcodes to Microsoft廬 Office applications with a click of a button. In Microsoft廬 Word, create single barcodes, pages of labels, or mail merge documents. In Microsoft廬 Excel廬, select a range of Cells and automatically convert each cell to a barcode. In Microsoft廬 Access廬, create reports with barcodes based on your data tables.
標簽: BarCodeWiz Microsoft Creating barcodes
上傳時間: 2013-12-18
上傳用戶:asddsd
本帖最后由 黃瓜 于 2014-3-2 21:39 編輯 在2012年,帖子“圓點博士微型四軸飛行器開工拉...有錢出錢,沒錢出力” http://www.amobbs.com/thread-5504090-1-1.html得到壇友的大力支持。經過2013年的全年發展,資料已經相當成熟。樓主把全部資料整理到了一起,方便大家下載。 首先給大家介紹下這些資料的內容:(全部是源代碼,豪無保留): 1,小四軸飛行器源碼:包括陀螺儀芯片驅動代碼,數字濾波,四元數姿態解算和電機控制代碼,此外,還包括藍牙無線傳輸代碼,NRF24L01+無線傳輸代碼,小四軸無線更新固件代碼。 2,小四軸手持遙控器源碼。包括USB轉COM口代碼,藍牙編程代碼,搖桿控制代碼,和液晶屏顯示代碼。通過該代碼,用戶可以學習USB編程,藍牙編程,搖杠編程,液晶屏顯示編程能知識。 3,基于windows/Linux下的上位機代碼,能過獲取小四軸姿態,并對小四軸進行飛行控制。該代碼使用垮平臺算法QT編寫。 4,基于Android的手機遙控器代碼,可以實現對小四軸的飛行控制 5,對國外著名開源crazyflies開源算法的姿態部分的移植(已修改成大家熟知的MDK環境),帶FreeRTOS操作系統。
標簽: 姿態解算
上傳時間: 2015-04-14
上傳用戶:wusheng4495
Aidaohuakai( 樓主 ) 2013-8-22 11:45:24 只看該作者23307 | 41倒序瀏覽 論壇上對mpu6050的資料和討論并不多,很多壇友都說驅動失敗,老是顯示0. 以下就談談我的一些血與淚的教訓: 昨天開始接觸mpu6050,在網上查了很多資料,下載程序,準備一展身手。首先看了mpu6050中文資料,之后又看了那個mpu6050的測試程序,把這些看明白之后就開始寫程序了。我不是直接把程序復制過去,只是復制mpu6050的地址和初始化,IIC并沒有復制,就復制我上次寫的24C02的那個程序,想不到,這給了我血與淚的教訓,我原來是直接把IIC復制過來的,并沒有多留意。之后初始化mpu6050,寫入地址,讀出數據,下載到單片機之后,LCD上顯示000001,我感到郁悶,之后又調試,以為是顯示不對,又寫顯示,之后又下載,結果還是老樣,這樣半天就過去了。驅動沒成功,又懷疑芯片或引腳有問題,繼續調試,也沒成功。就一一對應地看了地址,又看了初始化,發現沒錯,調試還是不成功。最后干脆不接IIC總線,竟然發現了個天大的秘密,接不接IIC,LCD都顯示000001,我又用示波器測試波形,發現波形正確。在網上又查了別人的資料,在論壇上也很少有關于mpu6050的資料,也看了比別人的一些討論。很多壇友都說驅動失敗,老是顯示0. 沒辦法,一天就這樣過去了,今天早上,我又仔細看了程序,出乎我的想象,竟然是IIC的那個地址沒改,原來寫24C02的那個地址是a0,還是原封不動,把我嚇了一跳。把這些改過來之后,一切正常,能顯示加速度和陀螺儀。血與淚的教訓啊,是自己不細心造成的,忘記改地址!今天早上竟然花了不到2個鐘就調出來了,驚喜之時就寫了這個分享,希望對大家有用。
標簽: 圓點博士小四軸
上傳時間: 2015-04-14
上傳用戶:wusheng4495
DDSCAT 7.3 is a freely available open-source Fortran-90 software package applying the “discrete dipole approximation” (DDA) to calculate scattering and absorption of electromagnetic waves by targets with arbitrary geometries and complex refractive index. The targets may be isolated entities (e.g., dust particles), but may also be 1-d or 2-d periodic arrays of “target unit Cells”, which can be used to study absorption, scattering, and electric ?elds around arrays of nanostructures.
標簽: userguide
上傳時間: 2015-04-29
上傳用戶:499689361
楊教授的計算輻射, 計算全國各地區的太陽輻射
上傳時間: 2016-05-29
上傳用戶:wu1285568193
三種SMA接口pcb封裝 捕獲1.PNG (16.1 KB, 下載次數: 86) 捕獲2.PNG (17.35 KB, 下載次數: 39) 捕獲3.PNG (19.16 KB, 下載次數: 37)
上傳時間: 2017-03-06
上傳用戶:qjjjjwqvc