為提高電容測量精度,針對電容式傳感器的工作原理設計了基于PIC16LF874單片機電容測量模塊。簡單闡述了電容測量電路的應用背景和國內外研究現狀,介紹了美國Microchip公司PIC16LF874單片機的特性。電容式傳感器輸出的動態微弱電容信號通過PS021型電容數字轉換器把模擬量數據轉換成數字量數據,所測數據由PIC16LF874單片機應用程序進行處理、顯示和保存。實驗結果表明,固定電容標稱值為10~20 pF 的測量值相對誤差在1%以內,同時也可知被測電容容值越大,測量值和標稱值相對誤差越小。 Abstract: To improve the accuracy of capacitance measurement,aimed at the principle of work of mercury capacitance acceleration transducer,the design of micro capacitance measurement circuit is based on the key PIC16LF874 chip. Briefly discusses the application of the capacitance measuring circuit for the background and status of foreign researchers,focusing on the United States PIC16LF874 microcontroller features. Capacitive sensor outputed signal through the dynamics of weak PS021-chip capacitors (capacitancedigital converter) to convert analog data into digital data,the measured data from the PIC16LF874 microcontroller application process, display and preservation. Experimental results show that the fixed capacitor 10pF ~ 20pF nominal value of the measured value of relative error is within 1%,but also it canbe seen the value of the measured capacitance larger,measuring value and the nominal value of relative error smaller.
上傳時間: 2013-10-29
上傳用戶:wojiaohs
單片機作為一種微型計算機,其內部具有一定的存儲單元(8031除外),但由于其內部存儲單元及端口有限,很多情況下難以滿足實際需求。為此介紹一種新的擴展方法,將數據線與地址線合并使用,通過軟件控制的方法實現數據線與地址線功能的分時轉換,數據線不僅用于傳送數據信號,還可作為地址線、控制線,用于傳送地址信號和控制信號,從而實現單片機與存儲器件的有效連接。以單片機片外256KB數據存儲空間的擴展為例,通過該擴展方法,僅用10個I/O端口便可實現,與傳統的擴展方法相比,可節約8個I/O端口。 Abstract: As a micro-computer,the SCM internal memory has a certain units(except8031),but because of its internal storage units and the ports are limited,in many cases it can not meet the actual demand.So we introduced a new extension method,the data line and address lines combined through software-controlled approach to realize the time-conversion functions of data lines and address lines,so the data lines not only transmited data signals,but also served as address lines and control lines to transmit address signals and control signals,in order to achieve an effective connection of microcontroller and memory chips.Take microcontroller chip with256KB of data storage space expansion as example,through this extension method,with only10I/O ports it was achieved,compared with the traditional extension methods,this method saves8I/O ports.
上傳時間: 2014-12-26
上傳用戶:adada
介紹基于VHDL的微型打印機控制器的設計。論述了微型打印機的基本原理,以及實現控制器的VHDL語言設計。打印機的數據來自系統中的存儲模塊,根據需要控制打印。該微型打印機控制器可取代傳統的微型打印機,且抗干擾性好,可靠性高,具有較強的移植性,稍加改動就可應用于不同場合。 Abstract: This paper introduced the design method of micro printer controller based on VHDL.The basic principles of microprinter is explained,as well as the realization of the controller by VHDL language.The printer data is from the system memory modules,can control printer.The design of microprinter controller has antigood and high reliability,it can replace the traditional printer.The controller has very good portability,and need little modify that can use in different situation.
上傳時間: 2013-11-03
上傳用戶:dudu1210004
P89V51RD2是PHILIPS公司推出的51系列的新型微控制器,它包含64KBFlash和1024字節的數據RAM,支持并行和串行的在系統編程(ISP)和在應用中編程(IAP),具有SPI和增強型UART,包含一個PCA(可編程計數器陣列),具有PWM和捕獲/比較功能。該芯片有一個最突出的特點就是帶有自調試功能(SoftICE),該功能使得芯片可以在KeilµVision2編程環境下用KeilMonitor-51Driver直接調試程序。 為幫助用戶盡快熟悉并掌握P89V51RD2系列單片機的SoftICE特性,作者用該單片機制作了一個簡易的仿真器,配合使用KeilµVision2的硬件仿真環境,可實現對程序的單步仿真、多步仿真及全速運行下的仿真。
上傳時間: 2013-11-09
上傳用戶:meiguiweishi
針對當前安檢力學試驗機所能完成的試驗種類單一、自動化程度低等問題,提出一種以ATmega128單片機為核心控制器的安檢力學試驗機的設計。詳細闡述了該安檢力學試驗機各個組成部分的設計原理和方案,并且給出了各部分的軟件設計思想和操作流程。經過大量測試試驗表明:設計的安檢力學試驗機可以完成多達十余種的力學安檢試驗,完全符合相關國家標準,并且具有數據采集精度高、傳輸速度快、操作安全簡便等特點,實現了安檢設備的多功能化、數字化和自動化。 Abstract: Currently, many mechanical security testing machines have only one function. The degree of automation of them is low. To solve those problems, a new kind of mechanical security testing machine, using ATmega128 micro-controller as its core controller, has been advanced. It describes the components of the machine. The principles and the scheme in the designing processes are presented in detail, and the software architecture and the operation processes of each part are given. After having done many testing, we have reached the following conclusions: the mechanical security testing machine presented can do over ten mechanical security tests complying with related national standards. It has high data acquisition accuracy and high transmission speed. The operation of the machine is simple and safe. In general, this machine is a multi-functional, highly automatic, digitalized security testing device.
上傳時間: 2013-11-05
上傳用戶:a67818601
µPSD3251標準的8032內核-3個16位定時器/計數器-2個外部中斷雙FLASH結構-64K字節MainFLASH-16K字節SecondFLASH-2K字節的SRAM-可編程邏輯-DPLD,CPLD-提供I2C,UART接口,PWM,ADC-提供更多的I/O口-高達50根I/O口線內置WDT在系統編程(ISP)在應用中再編程(IAP)·PSD結構提高了8051的性能·-可編程系統外圍芯片·-雙FLASH實現在應用中再編程(IAP)·-允許8051程序代碼和數據在存儲器間的切換,滿足用戶的需要·-JTAG編程特別適用于實驗開發和生產階段的需要·高達288K字節的存儲單元,為什么要這么大的存儲單元·-使用C語言編程需要用較大的存儲空間·-菜單、圖形、顯示類的用戶接口要用到大量的存儲空間·-多種語言、字體以及數據表需要大空間存儲器·-要想數據轉換速度快同樣需要大量的存儲單元·-數據記錄·-低成本·-與其他的以8051或某種8位MCU為內核帶有大容量的SRAM和Flash的設備相比,uPSD為用節省了成本
上傳時間: 2013-10-09
上傳用戶:rocwangdp
自從20世紀70年代單片機問世以來,由于其體積小、功耗低,被廣泛應用在工業控制、智能儀表、家用電器和通訊等領域,并受到越來越多的關注。MCS-51系列單片機更是單片機史上的里程碑和奇葩,歷經二十多年,依然新品疊出。
上傳時間: 2013-11-21
上傳用戶:yeluorag
C51BOX仿真器是一款方便小巧的仿真器,C51BOX通過與KEIL µVision2 Debugger軟件的配合,完成C51程序的加載、單步、斷點、全速運行等功能。C51BOX無需外接交流電源,直接USB供電,同時也可為外接模塊供電。輸出電壓和IO電平可調,便于直接調試2.7V-5V邏輯電平的器件,如液晶模塊、AD/DA芯片、EEPROM等。
上傳時間: 2014-01-26
上傳用戶:lbbyxmraon
隨著單片機功能集成化的發展,其應用領域也逐漸地由傳統的控制,擴展為控制處理、數據處理以及數字信號處理(DSP,Digital Signal Processing)等領域。凌陽的16位單片機就是為適應這種發展而設計的。它的CPU內核采用凌陽最新推出的µ’nSP™(Microcontroller and Signal Processor)16位微處理器芯片(以下簡稱µ’nSP™)。圍繞µ’nSP™所形成的16位µ’nSP™系列單片機(以下簡稱µ’nSP™家族)采用的是模塊式集成結構,它以µ’nSP™內核為中心集成不同規模的ROM、RAM和功能豐富的各種外設接口部件。
上傳時間: 2013-11-07
上傳用戶:wpwpwlxwlx
Stellaris(群星)單片機的片上FLASH編程(英) INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH LUMINARY MICRO PRODUCTS. NO LICENSE,EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THISDOCUMENT. EXCEPT AS PROVIDED IN LUMINARY MICRO’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS,LUMINARY MICRO ASSUMES NO LIABILITY WHATSOEVER, AND LUMINARY MICRO DISCLAIMS ANY EXPRESS OR IMPLIEDWARRANTY, RELATING TO SALE AND/OR USE OF LUMINARY MICRO’S PRODUCTS INCLUDING LIABILITY OR WARRANTIESRELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHTOR OTHER INTELLECTUAL PROPERTY RIGHT. LUMINARY MICRO’S PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL,LIFE SAVING, OR LIFE-SUSTAINING APPLICATIONS.
上傳時間: 2013-10-22
上傳用戶:JamesB