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
關閉系統(tǒng)服務 @echo off @net share ipc$ /delete @net share admin$ /delete @net share c$ /delete @net share d$ /delete @net share e$ /delete @net share f$ /delete @net share g$ /delete pause
上傳時間: 2014-01-08
上傳用戶:xg262122
參考了JAVA方面MIS系統(tǒng)開發(fā)的書籍做的一個 電力收費的系統(tǒng),包里面是可以直接運行的JAR文件了...SRC是源文件可一些需要的包...數據庫是用的MSQLserver2000,"java程序數據源.BAK"如果安裝不到SQLserver就按照在SSQL2000里面的提示做,或者在G盤下安裝(我原來的數據庫是安裝在G盤的)一個數據庫,再在里面安裝(恢復)這個備份
標簽: MSQLserver JAVA 2000 java
上傳時間: 2015-05-16
上傳用戶:zhouli
軟件測試方便的入門書,比較全,我這里ebook有好多,編程設計的收集了好幾個G
標簽: 軟件測試
上傳時間: 2014-12-07
上傳用戶:561596
The Audio File Library provides a uniform programming interface to standard digital audio file formats. This library allows the processing of audio data to and from audio files of many common formats (currently AIFF, AIFF-C, WAVE, NeXT/Sun .snd/.au, IRCAM, AVR, Amiga IFF/8SVX, and NIST SPHERE). The library also supports compression (currently G.711 mu-law and A-law and IMA and MS ADPCM) as well as PCM formats of all flavors (signed and unsigned integer, single- and double-precision floating point).
標簽: programming interface provides standard
上傳時間: 2014-12-06
上傳用戶:a6697238
This comprehensive clear screen tutorial using Java native interface. Teaches you from A-Z how you go about clearing the windows dos console.
標簽: comprehensive interface you tutorial
上傳時間: 2015-05-28
上傳用戶:qlpqlq
Appliction => rs232測試 應用程式 Driver => usb to rs232 驅動程式(wdm ddk) DLL => 應用程式 Firmware => USBtoRS232 硬體韌體
標簽: Appliction 232 gt Firmware
上傳時間: 2015-06-03
上傳用戶:yimoney
做到在互連網的語音通信功能,使用g.729壓縮,在 北京 -------- 重慶 間測試過,一端是長城寬帶。一端是56k modem 撥號上網。語音比較清晰,但有一點停噸現(xiàn)象。
上傳時間: 2013-12-26
上傳用戶:cursor
魔王語言解釋 [問題描述] 有一個魔王總是使用自己的一種非常精練而又抽象的語言講話,沒有人能聽得懂,但他的語言是可以逐步解釋成人能聽懂的語言,因為他的語言是由以下兩種形式的規(guī)則由人的語言逐步抽象上去的: (1) α 轉換為 β1β2…βm (2) (θδ1δ2…δn) 轉換為 θδnθδn-1… θδ1θ 在這兩種形式重,從左到右均表示解釋。試寫一個魔王語言的解釋兄,把他的話解釋成人能聽得懂的話。 [基本要求] 用下述兩條具體規(guī)則和上述規(guī)則形式(2)實現(xiàn)。設大寫字母表示魔王語言的詞匯;小寫字母表示人的語言詞匯;希臘字母表示可以用大寫字母或小寫字母代換的變量。魔王語言可含人的詞匯。 (1)B 轉換為 tAdA (2)A 轉換為 sae [測試數據] B(exnxgz)B解釋成tsaedsaeezegexenehetsaedsae 若將小寫字母與漢字建立下表所示的對應關系,則魔王說的話是:“天上一只鵝地上一只鵝鵝追鵝趕鵝下鵝蛋鵝恨鵝天上一直鵝地上一只鵝”。 t d s a e z g x n h 天 地 上 一只 鵝 追 趕 下 蛋 恨
上傳時間: 2014-12-21
上傳用戶:大三三
every function has its own help which can be obtained by typing "help name" where "name" is the function, e.g. "help fcm"
標簽: help name function obtained
上傳時間: 2015-06-23
上傳用戶:zhuoying119