This example program shows how to configure and use the A/D Converter of the following microcontroller:
STMicroelectronics ST10F166
After configuring the A/D, the program reads the A/D result and outputs the converted value using the serial port.
To run this program...
Build the project (Project Menu, Build Target)
Start the debugger (Debug Menu, Start/Stop Debug Session)
View the Serial Window (View Menu, Serial Window #1)
View the A/D converter peripheral (Peripheral Menu, A/D Converter)
Run the program (Debug Menu, Go)
A debug script (debug.ini) creates buttons that set different analog values in A/D channels. As the program runs, you will see the A/D input and output change.
Other buttons create signals that generate sine wave or sawtooth patterns as analog inputs. µ Vision3 users may enable the built-in Logic Analyzer to view, measure and compare these input signals graphically.
經(jīng)典著作《設計模式》中將策略模式定義為：定義一系列的算法，把它們一個個的封裝起來，并且使它們可以相互轉(zhuǎn)換。這個定義還是比較抽象，下面我將通過一個例子來具體的講解策略模式。感覺這樣更容易幫助新手理解模式，這也是《Head First Design patterns》中講解模式的方法。先來描述一下用到的例子的背景資料：
The Hopfield model is a distributed model of an associative memory. Neurons are pixels and can take the values of -1 (off) or +1 (on). The network has stored a certain number of pixel patterns. During a retrieval phase, the network is started with some initial configuration and the network dynamics evolves towards the stored pattern which is closest to the initial configuration.
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Metalog is a modern replacement for syslogd and klogd. The logged messages
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can be launched when specific patterns are found.
Metalog is easier to configure than syslogd and syslog-ng, accepts unlimited
number of rules and has (switchable) memory bufferization for maximal
performance.
軟件開發(fā)工程是有趣的、多產(chǎn)的，甚至是大膽的。同時，它也能源源不斷地帶來商業(yè)價值，并保持在我們的掌控之下。 極限編程(XP)的構(gòu)思和發(fā)展是針對小型團隊進行軟件開發(fā)時，在面對不確知的、變化的需求時所產(chǎn)生的特定需要的。這一新的、輕量級的方法學對許多傳統(tǒng)思維提出了挑戰(zhàn)，這其中包括一個一直以來的假設，即在軟件開發(fā)過程中，對軟件進行一個小小的改動就必然會使其開發(fā)成本大大增加。極限編程認可軟件開發(fā)工程應該節(jié)約成本，而且一旦實現(xiàn)了某種節(jié)約就應該加以開發(fā)利用。 你可以喜歡XP，也可以恨它，但是本書將會使你對如何開發(fā)軟件有一個全新的認識。KentBeck擁有并經(jīng)營著First Class軟件公司，在這里他把主要精力放在兩個最大的興趣上——模式和極限編程。他一直在研究軟件開發(fā)的先驅(qū)模式、CRC卡、HotDraw畫圖編輯器框架、xUnit單元測試框架以及測試為先的編程。他發(fā)表了五十多篇關于編程的文章，并出版了《The Smalltalk Best Practice patterns》(Prentice-Hall出版社)和《Kent Beck’s Guide to Better Smalltalk：A Sorted Collection》(劍橋大學出版社)兩本著作，同時他還是超級暢銷書《重構(gòu)——改善既有代碼的設計》(中英文版皆由中國電力出版社出版)的特約撰稿人。
