應用單片機的時候,經(jīng)常會遇到需要短時間延時的情況。需要的延時時間很短,一般都是幾十到幾百微妙(us)。有時候還需要很高的精度,比如用單片機驅動DS18B20的時候,誤差容許的范圍在十幾us以內,不然很容易出錯。這種情況下,用計時器往往有點小題大做。而在極端的情況下,計時器甚至已經(jīng)全部派上了別的用途。這時就需要我們另想別的辦法了。
標簽: 用單片機
上傳時間: 2014-01-15
上傳用戶:fnhhs
this program is very interesting for to calculate with simple operation and advance operation. simple operation such us +,-,:,x and advance operation such as calculate sin,cos and tan implementation
標簽: operation interesting calculate program
上傳時間: 2013-12-18
上傳用戶:熊少鋒
CT DCOM源代碼,實現(xiàn)CT MR us等DICOM格式轉換。
上傳時間: 2017-04-20
上傳用戶:JasonC
Contains a project related to the managment of a Telephone Directory... Feel free to download and use!!
標簽: managment Telephone Directory Contains
上傳時間: 2014-01-26
上傳用戶:thesk123
Generate random bits, convert to bipolar, corrupt the message by passing through noise and decode using hard decision decoding and calculate BER
標簽: Generate bipolar convert corrupt
上傳時間: 2013-12-25
上傳用戶:1966640071
Delphi 2009 Filtered Generics class. this is an enhanced Filtered generics class to use. Tested it s working. Codegear D2009 gives us to use generics in win32 applications.
標簽: Filtered class Generics enhanced
上傳時間: 2017-05-20
上傳用戶:xuanjie
In c++ risks is a reference to a variable which exists i.e. one 2nd name for the same variable. This program is broken up into functions.露the function hand constitutes the entrance point of the program, firstly there is the function message which us affiche hello , and the second function produced 露procedure affich_calcul, one declared the prototype and one it definite after one made the call has this function.
標簽: variable i.e. reference exists
上傳時間: 2013-12-17
上傳用戶:netwolf
工業(yè)領域串口通信速度慢是個比較突出的問題, 而 F T 2 4 5 B M 能夠進行 us B和并行 I / O口之間的 協(xié)議轉換, 在一些條件下能夠取代串口. 介紹 F T 2 4 5 B M 芯片的工作原理和功能, 并給出基于 F T2 4 5 B M 的 us B接口電路的應用設計和基于 8 9 c 5 2的匯編及 c 5 1 單片機源程序.
上傳時間: 2017-05-27
上傳用戶:kytqcool
5800C Fm芯片資料和驅動代碼 技術特點: *國內首顆采用CMOS工藝的調頻收音機芯片; *驅動能力強,可直接驅動耳機及放大器; *功耗低,比國外先進方案還低1mA; *頻率覆蓋從76M-108M的各國調頻波段; *高度集成度,所需外圍器件數(shù)為零; *強大的LOW-IF數(shù)字音頻結構; *強大的數(shù)字信號處理技術(DSP),實現(xiàn)自動頻率控制和自動增益控制; *數(shù)字自適應噪聲抑制 接受靈敏度高、音質出色、立體聲效果優(yōu)異; *支持重低音,可調式電臺搜尋、柔軟靜音和混音等功能; *只需一個32.768K晶振作為參考時鐘; *支持I2C和SPI數(shù)字接口,支持I2S音頻接口,可以配合所有多媒體處理芯片; *可調去加重(50/75 us) ; *模擬和數(shù)字音量控制; *線性模擬輸出電壓; *兩線和三線控制接口模式; *封裝面積: 4×4mm,24-pin QFN
上傳時間: 2017-06-21
上傳用戶:1101055045
This control is another extension to the now standard and widely used ListView control. I have included some of the more common features: shaded columns, column sorting (with data type), but the real addition is the FILTERBAR features of the header. This implementation eliminates all of the work of dealing with the filter messages and item filtering by incorporating it into the control. This could have been implemented as delegates, but we create controls to do the work for us, don t we? I would like to thank Carlos H. Perez since a lot of the implementation came from examples he set with his ListViewEx control.
標簽: control extension ListView standard
上傳時間: 2013-12-05
上傳用戶:royzhangsz