MMC/SD卡以其優越的性能，在單片機嵌入式設備中得到廣泛應用。將MMC/SD卡作為外部掉電存儲介質應用于音頻信號發生器中，通過8051F330單片機上的SPI接口，實現單片機—MMC/SD卡的存儲擴展，設計了此硬件平臺上的MMC/SD卡的單片機驅動程序，并給出了相應的程序代碼，滿足音頻信號發生器的大容量存儲要求。 Abstract: MMC/SD card is more and more widely used in the single chip embedded devices for their excellent performances.This article introduces the application of MMC/SD card as the external power down storage medium in audio signal generator. The extension technology especially for storage of single chip-MMC/SD card via SPI interfaces in 8051F330 single chip, including designs single chip drive program of MMC/SD card based on hardware platform,and also gives the key coding of the program. The implementation of big capacity storage is meaningful in audio signal generator.
上傳時間： 2014-12-27
上傳用戶：黃華強
介紹一種無極可調交流電子負載設計的新方法，由ATmega48單片機輸出PWM波，通過上位機設定不同的占空比控制場效應管的通斷時間，即改變流過場效應管的平均電流。根據電流的大小，可以等效為相應的負載，并將采集的電流值顯示在上位機上。文中對該系統的軟﹑硬件設計思路作了詳細的分析，闡述了其設計原理。 Abstract: A new type electronic load is introduced.Due to ATmega48 microcomputer output PWM wave.The different duty is set ratio through PC to control FET turn-on time.We can equivalent homologous load according the current and display the current at PC.The hardware and software designing are analysed in detail. The principle is explained and the output is also given.
上傳時間： 2013-11-23
上傳用戶：蟲蟲蟲蟲蟲蟲
對于傳統的跑步機無法聯機組網，保存歷史數據，實時調試等問題，介紹了一個由多臺跑步機通過RS-232串行總線與上位機相連組成的跑步機聯網系統。系統采用W77E58作為下位機核心控制器件，它具有雙串行通訊端口，其中一個串口用于與變頻器通訊，另一個串口則與上位機相連，構成跑步機網絡。 Abstract: The traditional running machine can not be connected to a network, saving historical data, real time debug etc.In this paper,a new network system which is composed of running machines connected by a RS-232 communication bus is introduced.In the system,W77E58 is used as a core control unit.W77E58 has two serial ports,one is connected to the inverter and the other is connected to the PC. Thus a network appears.
上傳時間： 2014-12-27
上傳用戶：哇哇哇哇哇
通過對程控濾波器的理論分析，在研究MAX262的功能和單片機的SPI總線通信的基礎上，提出了基于MAX262的程控濾波器設計方案，設計了程控濾波器的軟硬件，并給出了測試結果。 Abstract: By analyzing the programmable filter,the paper puts forward a programmable filter system design based on MAS262 on basic of studying MAS262 features and SPI bus communication.Software and hardware of the programmmable filter are designed,and the test result is given.
上傳時間： 2013-11-15
上傳用戶：wxhwjf
利用MAXQ2000微控制器實現快速傅里葉變換
上傳時間： 2013-11-06
上傳用戶：llandlu
介紹了MPC555與CS8900A擴展以太網的硬件設計圖。以NUCLUES PLUS操作系統為基礎，介紹了網卡軟件驅動程序的編制，給出了以太網協議包嵌入NUCLEUS PLUS操作系統的實現方法。 Abstract: The Ethernet extension hardware design of MPC555 and CS8900A are introduced,and the software driven program based on NUCLEUS PLUS operation system and the technique that Ethernet protocol embedded in NUCLEUS PLUS real operation system are discussed.
上傳時間： 2013-10-23
上傳用戶：xiehao13
采用單片機技術，設計了一種車用空調控制器。控制器可對空調的各個部件進行控制，實現制冷制熱、調整風量及控制風口的變換等操作。系統采用液晶顯示屏顯示，由程序控制實現各個環節的功能，方便了汽車駕駛員的操作。該設計具有很高的實用價值，可適用于現有的大多數汽車以及工程車。
上傳時間： 2013-10-19
上傳用戶：mnacyf
介紹了基于單片機航空交流電參數測試儀的系統設計。以Silicon Labs公司的C8051F005單片機為核心設計出數據采集板，通過RS-232串口與上位機通訊。運用Lab Windows/CVI編寫的上位機軟件實現信號的檢測以及波形和數據的顯示，給出了測試儀硬件電路的組成和軟件流程圖。本系統具有硬件結構簡單、容易實現和成本低等特點，在實際應用中其穩定性、精確性均能滿足客戶要求。 Abstract: The design of aeronautics AC parameters tester based on the single-chip is introduced.The core component of data acquisition board is C8051F005 single chip of Silicon Labs Company,and communication with PC through RS-232. The signal processing software programmed with LabWindows/CVI can be used successfully to fulfill inspection of signal and display of the waveform and data. The hardware and software configuration of test instrument are provided.The hardware of the system is simple, and can be easily realized.The stability and precision of the measurement instrument are enough to meet the requirements.
上傳時間： 2013-11-18
上傳用戶：wang5829
詳細介紹了TLC1549系列模數轉換器的特點及工作原理，然后根據TLC1549的工作時序和A/D轉換原理針對實際問題編寫了詳細的匯編語言程序。 Abstract: A basic principle and characteristic of TLC1549 analog-to-digital converter are introduced? detailedly in this article.Through engineering-oriented illustration,a microcomputer programmer base on basic principle and time sequence of TLC1549 is writted.
上傳時間： 2014-07-16
上傳用戶：blans
以ＦＰＧＡ為數字邏輯平臺，借助繼電器矩陣和多路模擬開關，以ＡＤＳ１２１１為核心，在單片機控制下，聯合實現手持式虛擬／智能存儲示波表中數字多用表功能，實驗表明該設計是行之有效的。文中介紹了數字多用表的系統結構，重點討論了其測量電路和智能控制方案。 Abstract: Ｔｈｅ ｄｉｇｉｔａｌ ｍｕｌｔｉｍｅｔｅｒ ｉｎ ｖｉｒｔｕａｌ／ｉｎｔｅｌｌｅｃｔ ｄｉｇｉｔａｌ－ｏｓｃｉｌｌｏｒｇａｐｈ ｗａｓ ｆｕｌｆｉｌｌｅｄ, ｗｈｉｃｈ ｗａｓ ｃｏｎｔｒｏｌｌｅｄ ｂｙ ｓｉｎｇｌｅｃｈｉｐ ｃｏｍｐｕｔｅｒ ｂｙ ｒｅｌａｙ ｍａｔｒｉｘ ａｎｄ ａｎａｌｏｇｕｅ ｓｗｉｔｃｈｅｓ,ｉｎ ｗｈｉｃｈ ＦＰＧＡ ｗａｓ ｕｓｅｄ ｆｏｒ ｄｉｇｉｔａｌ ｌｏｇｉｃａｌ ｐｌｏｔ-ｆｏｒｍ, ＡＤＳ１２１１ ｆｏｒ ｋｅｒｎｅｌ ｃｈｉｐ, ｔｈｅ ｅｘｐｅｒｉｍｅｎｔ ｓｈｏｗｅｄ ｔｈｅ ｄｅｓｉｇｎ ｗａｓ ｆｅａｓｉｂｌｅ, ｔｈｅ ｓｙｓｔｅｍ ｓｔｒｕｃｔｉｏｎ ｗａｓ ｐｒｅｓｅｎｔ-ｅｄ ｉｎ ｔｈｅ ｐａｐｅｒ, ｍｅａｓｕｒｅ ｃｉｒｃｕｉｔ ａｎｄ ｉｎｔｅｌｌｅｃｔ ｃｏｎｔｒｏｌ ｐｌａｎ ｏｆ ｄｉｇｉｔａｌ ｍｕｌｔｉｍｅｔｅｒ ｗｅｒｅ ｍａｉｎｌｙ ｇｉｖｅｎ．
上傳時間： 2013-11-02
上傳用戶：瓦力瓦力hong
