自制51編程器 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).
標簽： programmer program device build
上傳時間： 2015-05-11
上傳用戶：sdq_123
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.
標簽： signal Modulated analog create
上傳時間： 2015-05-14
上傳用戶：CHINA526
This application, built in VB using MapObjects, allows the user to zoom in, zoom out and pan using Only the mouse. The pan is a dynamic pan just push the mouse in the direction you would like to pan.
標簽： using zoom application MapObjects
上傳時間： 2014-12-22
上傳用戶：ryb
Although there has been a lot of AVL tree libraries available now, nearly all of them are meant to work in the random access memory(RAM). Some of them do provide some mechanism for dumping the whole tree into a file and loading it back to the memory in order to make data in that tree persistent. It serves well when there s just small amount of data. When the tree is somewhat bigger, the dumping/loading process could take a lengthy time and makes your mission-critical program less efficient. How about an AVL tree that can directly use the disk for data storage ? If there s something like that, we won t need to read through the whole tree in order to pick up just a little bit imformation(a node), but read Only the sectors that are neccssary for locating a certain node and the sectors in which that node lies. This is my initial motivation for writing a storage-media independent AVL Tree. However, as you step forth, you would find that it not Only works fine with disks but also fine with memorys, too.
標簽： available libraries Although nearly
上傳時間： 2014-01-22
上傳用戶：zhoujunzhen
解決時鐘問題，acm競賽題 A weird clock marked from 0 to 59 has Only a minute hand. It won t move until a special coin is thrown into its box. There are different kinds of coins as your options. However once you make your choice, you cannot use any other kind. There are infinite number of coins of each kind, each marked with a number d ( 0 <= 1000 ), meaning that this coin will make the minute hand move d times clockwise the current time. For example, if the current time is 45, and d = 2. Then the minute hand will move clockwise 90 minutes and will be pointing to 15. Now you are given the initial time s ( 0 <= s <= 59 ) and the coin s type d. Write a program to find the minimum number of d-coins needed to turn the minute hand back to 0.
標簽： 時鐘
上傳時間： 2015-05-21
上傳用戶：rishian
Decoding most of the infrared signals can be easily handled by PIC16C5X microcontrollers. This application note describes how this decoding may be done. The Only mandatory hardware for decoding IR signals is an infrared receiver. The use of two types is described here. Both are modular types used often by the consumer electronics industry. The first type responds to infrared signals modulated at about 40 kHz. The second responds to non-modulated infrared pulses and has a restricted range. The hardware costs of each approach will be less than two dollars.
標簽： microcontrollers Decoding infrared handled
上傳時間： 2015-05-24
上傳用戶：ruan2570406
This example imports a text file into a database table using ADO. Because it uses ADO, it should work with all data sources, though it has Only been tested with Access. Usage is explained in the code s comments.
標簽： ADO database Because example
上傳時間： 2013-12-27
上傳用戶：1079836864
This a simple genetic algorithm implementation where the evaluation function takes positive values Only and the fitness of an individual is the same as the value of the objective function
標簽： implementation evaluation algorithm function
上傳時間： 2015-06-03
上傳用戶：2467478207
This class implements the same API as the Java 1.3 java.util.TimerTask. * Note that a TimerTask can Only be scheduled on one Timer at a time, but * that this implementation does not enforce that constraint.
標簽： TimerTask implements the class
上傳時間： 2015-06-10
上傳用戶：無聊來刷下
DOS XMS library is a DOS real mode and large memory model C library. Because DOS is ran under real mode, programmer Only can access RAM under 1MB
上傳時間： 2015-06-13
上傳用戶：ANRAN
