自制51编程器 I have build my own programmer. This device can program the AT89C51 and wOrks with it. So it can easily be adapted to programming other devices by itself. The Atmel Flash devices are ideal fOr developing, since they can be reprogrammed easy, often and fast. You need only 1 Or 2 devices in low cost plastic case fOr developing. In contrast you need 10 Or mOre high cost windowed devices if you must develop with EPROM devices (e.g. Phillips 87C751).
标签： programmer program device build
上传时间： 2015-05-11
上传用户：sdq_123
This a very simple Yee algOrithm 3D FDTD code in C implementing the free space fOrm of Maxwell s equations on a Cartesian grid. There are no internal materials Or geometry. The code as delivered simulates an idealized rectangular waveguide by treating the interiOr of the mesh as free space/air and enfOrcing PEC (Perfect Electric ConductOr) conditions on the faces of the mesh.
标签： implementing algOrithm Maxwell simple
上传时间： 2015-05-14
上传用户：水中浮云
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, fOr example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is propOrtional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control fOr example the speed of DC motOrs Or the brightness of electric lighting.
标签： signal Modulated analog create
上传时间： 2015-05-14
上传用户：CHINA526
ARM下 Implement matrix multiplication of 2 square matrices, with data read from an input file and printed both to the console and to an output file. • Assume a file with cOrrect data (no garbage, characters, etc.). • you must check and provide appropriate execution fOr 2 extra cases, namely when the matrix size given is either “0” , Or when the size is greater than the maximum handled of “5” . In these 2 cases you must implement the following behaviour: o If size = 0, then print a message “Size = 0 is unacceptable” and continue by reading the next size fOr the next 2 matrices (if not end of file). o If size >5, then print two messages: “Size is too big - unacceptable”. Then read and discard the next (size2 ) integers and continue by reading the next size fOr the next 2 matrices (if not end of file).
标签： multiplication Implement matrices matrix
上传时间： 2014-08-30
上传用户：dsgkjgkjg
This is a serial mouse driver, which is compliant with Plug and Play, suppOrts dynamic detection (via serenum) and removal (either hotplug Or via the device manager). The code serves as a sample fOr any serial-enumerable device. The behaviOr of the various routines is documented in the source code files.
标签： compliant detection suppOrts dynamic
上传时间： 2015-05-16
上传用户：dancnc
10分钟学会SQl第三版 Sams Teach Yourself SQL in 10 Minutes has established itself as the gold standard fOr introductOry SQL books, offering a fast-paced accessible tutOrial to the majOr themes and techniques involved in applying the SQL language. FOrta s examples are clear and his writing style is crisp and concise. As with earlier editions, this revision includes coverage of current versions of all majOr commercial SQL platfOrms. New this time around is coverage of MySQL, and PostgreSQL. All examples have been tested against each SQL platfOrm, with incompatibilities Or platfOrm distinctives called out and explained.
标签： established Yourself standard Minutes
上传时间： 2014-07-07
上传用户：Pzj
物流分析工具包。Facility location: Continuous minisum facility location, alternate location-allocation (ALA) procedure, discrete uncapacitated facility location Vehicle routing: VRP, VRP with time windows, traveling salesman problem (TSP) NetwOrks: ShOrtest path, min cost netwOrk flow, minimum spanning tree problems Geocoding: U.S. city Or ZIP code to longitude and latitude, longitude and latitude to nearest city, MercatOr projection plotting Layout: Steepest descent pairwise interchange (SDPI) heuristic fOr QAP Material handling: Equipment selection General purpose: Linear programming using the revised simplex method, mixed-integer linear programming (MILP) branch and bound procedure Data: U.S. cities with populations of at least 10,000, U.S. highway netwOrk (Oak Ridge National Highway NetwOrk), U.S. 3- and 5-digit ZIP codes
标签： location location-allocation Continuous alternate
上传时间： 2015-05-17
上传用户：kikye
Unzip this file into a writeable directOry. You should end up with a "Geocode" project, as well as Bitmaps and TestData directOries. This sample geocodes single-match zip codes, entered by the user, Or a batch-match of a table of zips (and other info) against a point shapefile. The point data shapefile consists of 41859 point features from 1996 GDT data, in decimal degrees. The table of zips that can be used in the batch match consists of 38 recOrds, entitled "few_zips.dbf". MOre specifcs are found at the top of each fOrm and are provided throughout the code.
标签： directOry writeable Geocode project
上传时间： 2013-12-19
上传用户：wangchong
uc/os-ii fOr 8051 This package provides the sources required to use the uC/OS-II v2.00 real time kernel on the 8051 processOr. To use this package you will need the TASKING C Compiler toolset v6.0r1 Or higher. FOr info on TASKING products you can contact our Web-site at: http://www.tasking.com Unzip the zipfile in the root of the drive where you also installed the uC/OS-II general sources. The following directOries will be added: \SOFTWARE\UCOS-II\8051 This directOry contains the microprocessOr specific source code \SOFTWARE\UCOS-II\ex1_8051r This directOry contains the project files fOr the first example \SOFTWARE\UCOS-II\ex2_8051r This directOry contains the project files fOr the second example
标签： the provides required package
上传时间： 2015-05-21
上传用户：ainimao
数字运算，判断一个数是否接近素数 A Niven number is a number such that the sum of its digits divides itself. FOr example, 111 is a Niven number because the sum of its digits is 3, which divides 111. We can also specify a number in another base b, and a number in base b is a Niven number if the sum of its digits divides its value. Given b (2 <= b <= 10) and a number in base b, determine whether it is a Niven number Or not. Input Each line of input contains the base b, followed by a string of digits representing a positive integer in that base. There are no leading zeroes. The input is terminated by a line consisting of 0 alone. Output FOr each case, print "yes" on a line if the given number is a Niven number, and "no" otherwise. Sample Input 10 111 2 110 10 123 6 1000 8 2314 0 Sample Output yes yes no yes no
上传时间： 2015-05-21
上传用户：daguda
