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基于ADuC841的膜片鉗放大器系統設計

為降低成本和解決現有膜片鉗放大器系統中PC機的干擾問題，研究了一種基于單片機的膜片鉗放大器小系統。該系統采用ADI公司生產的ADuC841作為控制核心，并且配置相應的液晶顯示模塊LCM3202401。模擬電路部分采用高輸入阻抗的AD8627實現微電流信號的采集，并由后級電路進行信號的放大和電阻電容的補償。它具有硬件電路簡單、體積小、使用方便的特點。既可以單獨作為小系統實現采集和顯示，也可以通過紅外方式和PC機進行通訊，在PC機上進行信號的處理。 Abstract: In order to reduce cost and resolve the interferential problem with PC in existing patch clamp amplifiers, a small patch clamp amplifier system design based on microcontroller is studied. It adopts a new high performance microconverter ADuC841 by the ADI as the control core in the system, configuring a liquid crystal module LCM3202401. In the analog circuit, AD8627 with high input impedance is used to detect the low current，signal magnification, as well as resistance and capacitance compensation are accomplished by subsequent circuits. It has the advantage of simple hardware circuit design, small volume and convenient operation. It can either be used as an independent system to measure and show signal detected or transmit to PC by infrared ray.

標簽： ADuC 841 膜片鉗放大器

上傳時間： 2013-11-06

上傳用戶：yy_cn
基于CAN總線的數字式自動找平控制系統設計

對于瀝青混凝土攤鋪機自動找平控制系統來說，數字式控制系統的研制是目前的一個方向。介紹了一種基于CAN總線的數字式自動找平控制系統。該系統以CAN總線作為通信方式，PWM控制信號通過C8051F040單片機內部PCA可編程計數器陣列產生，并具有結構簡單、信號穩定、實時性強、易擴展的特點。通過硬件實現和系統運行達到了比較理想的控制效果，驗證了系統的可行性。 Abstract: A digital auto-leveling control system based on CAN Bus is introduced.It uses CAN Bus as the method of communication and creates PWM signals by programmable counter array in C8051F040 microcontroller. The system is simple, stable, real-time and expansive.

標簽： CAN 總線數字式控制系統設計

上傳時間： 2013-10-09

上傳用戶：ligi201200
PCF8578 LCD圖形點陣液晶驅動器芯片簡介及封裝庫

The PCF8578 is a low power CMOS1 LCD row and column driver, designed to drive dotmatrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 or 1:32. The device has40 outputs, of which 24 are programmable and configurable for the following ratios ofrows/columns: 32¤8, 24¤16, 16¤24 or 8¤32. The PCF8578 can function as a stand-alone LCDcontroller and driver for use in small systems. For larger systems it can be used inconjunction with up to 32 PCF8579s for which it has been optimized. Together these twodevices form a general purpose LCD dot matrix driver chip set, capable of driving displaysof up to 40960 dots. The PCF8578 is compatible with most microcontrollers andcommunicates via a two-line bidirectional bus (I2C-bus). Communication overhead isminimized by a display RAM with auto-incremented addressing and display bankswitching.

標簽： 8578 PCF LCD 圖形點陣

上傳時間： 2013-10-23

上傳用戶：頂得柱
CAT93C46 器件數據手冊

The CAT93C46 is a 1 kb Serial EEPROM memory device which isconfigured as either 64 registers of 16 bits (ORG pin at VCC) or 128registers of 8 bits (ORG pin at GND). Each register can be written (orread) serially by using the DI (or DO) pin. The CAT93C46 features aself−timed internal write with auto−clear. On−chip Power−On Resetcircuit protects the internal logic against powering up in the wrongstate.

標簽： CAT 93C C46 93

上傳時間： 2013-11-20

上傳用戶：ynzfm
ICCAVR自動下載程序

CCAVR軟件有ISP功能，能過調用STK500完成的，只要設置好參數，在ICCAVR中就可以給芯片編程了，還可以讓程序一編譯完就自動下載到芯片中，相當方便。在Tools->environment options->ISP里設定STK500.exe的路徑。— 用于調用STK500程序。在Tools->In system programming 里Programmer Interface中選中STK500。— 選擇STK500下載方式。在Tools->In system programming 里把Auto Program After Compile 的小勾選上。— 編譯后自動編程。在Tools->In system programming 中還有一些設置項，大家可以根據需要進行相關設置。下面的圖片是操作過程。

標簽： ICCAVR 自動下載程序

上傳時間： 2013-11-17

上傳用戶：joseph
CAT28LV64-64Kb CMOS并行EEPROM數據手

The CAT28LV64 is a low voltage, low power, CMOS Parallel EEPROM organized as 8K x 8−bits. It requires a simple interface for in−system programming. On−chip address and data latches, self−timed write cycle with auto−clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling and Toggle status bit signal the start and end of the self−timed write cycle. Additionally, the CAT28LV64 features hardware and software write protection.

標簽： EEPROM 64 CMOS CAT

上傳時間： 2013-11-16

上傳用戶：浩子GG
C51中的關鍵字及用途說明

C51 中的關鍵字關鍵字用途說明auto 存儲種類說明用以說明局部變量，缺省值為此break 程序語句退出最內層循環case 程序語句 Switch 語句中的選擇項char 數據類型說明單字節整型數或字符型數據const 存儲類型說明在程序執行過程中不可更改的常量值continue 程序語句轉向下一次循環default 程序語句 Switch 語句中的失敗選擇項do 程序語句構成do..while 循環結構double 數據類型說明雙精度浮點數else 程序語句構成if..else 選擇結構enum 數據類型說明枚舉extern 存儲種類說明在其他程序模塊中說明了的全局變量flost 數據類型說明單精度浮點數for 程序語句構成for 循環結構goto 程序語句構成goto 轉移結構if 程序語句構成if..else 選擇結構int 數據類型說明基本整型數long 數據類型說明長整型數register 存儲種類說明使用CPU 內部寄存的變量return 程序語句函數返回short 數據類型說明短整型數signed 數據類型說明有符號數，二進制數據的最高位為符號位sizeof 運算符計算表達式或數據類型的字節數static 存儲種類說明靜態變量struct 數據類型說明結構類型數據swicth 程序語句構成switch 選擇結構typedef 數據類型說明重新進行數據類型定義union 數據類型說明聯合類型數據unsigned 數據類型說明無符號數數據void 數據類型說明無類型數據volatile 數據類型說明該變量在程序執行中可被隱含地改變while 程序語句構成while 和do..while 循環結構ANSIC 標準關鍵字關鍵字用途說明bit 位標量聲明聲明一個位標量或位類型的函數sbit 位標量聲明聲明一個可位尋址變量

標簽： C51

上傳時間： 2013-10-08

上傳用戶：waves_0801
基于DSP的新型柴油發電機勵磁控制系統研究

在綜合分析諧波勵磁無刷同步發電機勵磁控制系統的基礎上,對其勵磁控制策略進行了研究,開發了一套基于DSP( TMS320F2812) 控制的新型柴油發電機勵磁控制系統,該系統采用參數自適應模糊PID 控制勵磁,選用交流采樣方式實時檢測各信號的瞬時特性,系統仿真結果以及在1 臺25 kW 工頻柴油發電機上的試驗結果證明了該控制器具有較好的電壓調節特性,系統穩態和暫態性能完全滿足發電機對勵磁系統的要求。關鍵詞:勵磁調節;模糊PID 控制;數字信號處理器;交流采樣 Abstract :According to the general analysis of the excitation cont rol system of the harmonious wave excitation brushless synchronous generator and it s characteristics ,a new type of diesel generator excitation cont rol system based on DSP( TMS320F2812) was designed. An adaptive fuzzy PID cont rol of excitation is used in this system. To detect the t ransient characteristics of the signals in a timely manner ,AC sampling was applied.The system simulation result s and the testing result s f rom a 25 kW diesel generator (50 Hz) can prove that the voltage regulation characteristics of the excitation cont rol system are very well ,and both the steadyOstate performance and the t ransient performance of the generator are also good.Key words :excitation cont rol ;fuzzy PID cont rol ;digital signal processor (DSP) ;AC sampling

標簽： DSP 柴油發電機勵磁控制系統研究

上傳時間： 2013-10-29

上傳用戶：fxf126@126.com
基于DSP的ATV-ATT中控系統設計

設計一種應用于某全地形ATV車載武器裝置中的中控系統，該系統設計是以TMS320F2812型DSP為核心，采用模塊化設計思想，對其硬件部分進行系統設計，能夠完成對武器裝置高低、回轉方向的運動控制，實現靜止或行進狀態中對目標物的測距，自動瞄準以及按既定發射模式發射彈丸和各項安全性能檢測等功能。通過編制相應的軟件，對其進行系統調試，驗證了該設計運行穩定。 Abstract: A central control system applied to an ATV vehicle weapons is designed. The system design is based on TMS320F2812 DSP as the core， uses modular design for its hardware parts. The central control system can complete the motion control of the level of weapons and equipment， rotation direction， to achieve a state of static or moving objects on the target ranging， auto-targeting and according to the established target and the projectile and the launch of the security performance testing and other functions. Through the development of appropriate software and to carry out system testing to verify the stability of this design and operation.

標簽： ATV-ATT DSP 中控系統

上傳時間： 2013-11-02

上傳用戶：jshailingzzh
XAPP1042-利用GPIO實現以太網PHY寄存器訪問

The XPS Ethernetlite peripheral does not provide any mechanism to access the Ethernet PHYregisters. These registers are used to configure auto negotiation parameters and to obtain PHYstatus. This application note provides reference systems and associated software to accessPHY registers by connecting the serial management bus signals MDC and MDIO to GPIOswhich the software controls directly.

標簽： XAPP 1042 GPIO PHY

上傳時間： 2013-10-17

上傳用戶：JamesB