关于FPGA流水线设计的论文 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.
标签: investigates implementing pipelines circuits
上传时间: 2015-07-26
上传用户:CHINA526
ARM7硬件说明与开发 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.
标签: ARM7 microprocessor low-power macrocell
上传时间: 2013-12-17
上传用户: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.
标签: Algorithm Efficient Effective Placement
上传时间: 2013-12-18
上传用户: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.
标签: finite-difference time-domain implements equations
上传时间: 2014-01-11
上传用户:270189020
Creating barcodes in Microsoft庐 Office has never been easier. With BarCodeWiz Toolbar you can add barcodes to Microsoft庐 Office applications with a click of a button. In Microsoft庐 Word, create single barcodes, pages of labels, or mail merge documents. In Microsoft庐 Excel庐, select a range of Cells and automatically convert each cell to a barcode. In Microsoft庐 Access庐, create reports with barcodes based on your data tables.
标签: BarCodeWiz Microsoft Creating barcodes
上传时间: 2013-12-18
上传用户:asddsd
本帖最后由 黄瓜 于 2014-3-2 21:39 编辑 在2012年,帖子“圆点博士微型四轴飞行器开工拉...有钱出钱,没钱出力” http://www.amobbs.com/thread-5504090-1-1.html得到坛友的大力支持。经过2013年的全年发展,资料已经相当成熟。楼主把全部资料整理到了一起,方便大家下载。 首先给大家介绍下这些资料的内容:(全部是源代码,豪无保留): 1,小四轴飞行器源码:包括陀螺仪芯片驱动代码,数字滤波,四元数姿态解算和电机控制代码,此外,还包括蓝牙无线传输代码,NRF24L01+无线传输代码,小四轴无线更新固件代码。 2,小四轴手持遥控器源码。包括USB转COM口代码,蓝牙编程代码,摇杆控制代码,和液晶屏显示代码。通过该代码,用户可以学习USB编程,蓝牙编程,摇杠编程,液晶屏显示编程能知识。 3,基于windows/Linux下的上位机代码,能过获取小四轴姿态,并对小四轴进行飞行控制。该代码使用垮平台算法QT编写。 4,基于Android的手机遥控器代码,可以实现对小四轴的飞行控制 5,对国外著名开源crazyflies开源算法的姿态部分的移植(已修改成大家熟知的MDK环境),带FreeRTOS操作系统。
标签: 姿态解算
上传时间: 2015-04-14
上传用户:wusheng4495
Aidaohuakai( 楼主 ) 2013-8-22 11:45:24 只看该作者23307 | 41倒序浏览 论坛上对mpu6050的资料和讨论并不多,很多坛友都说驱动失败,老是显示0. 以下就谈谈我的一些血与泪的教训: 昨天开始接触mpu6050,在网上查了很多资料,下载程序,准备一展身手。首先看了mpu6050中文资料,之后又看了那个mpu6050的测试程序,把这些看明白之后就开始写程序了。我不是直接把程序复制过去,只是复制mpu6050的地址和初始化,IIC并没有复制,就复制我上次写的24C02的那个程序,想不到,这给了我血与泪的教训,我原来是直接把IIC复制过来的,并没有多留意。之后初始化mpu6050,写入地址,读出数据,下载到单片机之后,LCD上显示000001,我感到郁闷,之后又调试,以为是显示不对,又写显示,之后又下载,结果还是老样,这样半天就过去了。驱动没成功,又怀疑芯片或引脚有问题,继续调试,也没成功。就一一对应地看了地址,又看了初始化,发现没错,调试还是不成功。最后干脆不接IIC总线,竟然发现了个天大的秘密,接不接IIC,LCD都显示000001,我又用示波器测试波形,发现波形正确。在网上又查了别人的资料,在论坛上也很少有关于mpu6050的资料,也看了比别人的一些讨论。很多坛友都说驱动失败,老是显示0. 没办法,一天就这样过去了,今天早上,我又仔细看了程序,出乎我的想象,竟然是IIC的那个地址没改,原来写24C02的那个地址是a0,还是原封不动,把我吓了一跳。把这些改过来之后,一切正常,能显示加速度和陀螺仪。血与泪的教训啊,是自己不细心造成的,忘记改地址!今天早上竟然花了不到2个钟就调出来了,惊喜之时就写了这个分享,希望对大家有用。
标签: 圆点博士小四轴
上传时间: 2015-04-14
上传用户: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 fields around arrays of nanostructures.
标签: userguide
上传时间: 2015-04-29
上传用户:499689361
杨教授的计算辐射, 计算全国各地区的太阳辐射
上传时间: 2016-05-29
上传用户:wu1285568193
三种SMA接口pcb封装 捕获1.PNG (16.1 KB, 下载次数: 86) 捕获2.PNG (17.35 KB, 下载次数: 39) 捕获3.PNG (19.16 KB, 下载次数: 37)
上传时间: 2017-03-06
上传用户:qjjjjwqvc