Bootloader是微處理器上電時(shí)運(yùn)行的第一段代碼，它可以通過(guò)通信接口實(shí)現(xiàn)對(duì)微處理器內(nèi)部應(yīng)用程序的更新升級(jí)，為網(wǎng)絡(luò)化嵌入式產(chǎn)品的應(yīng)用程序升級(jí)帶來(lái)極大的便利。由于目前沒(méi)有統(tǒng)一嵌入式系統(tǒng)的Bootloader。基于NEC 78K0系列單片機(jī)自編程原理，設(shè)計(jì)出一個(gè)適用于78K0/Fx2系列單片機(jī)的Bootloader，并能夠通過(guò)單片機(jī)串口在線升級(jí)應(yīng)用程序。 Abstract: Bootloader is the first piece of code executed after microprocessor startup. It makes the embedded product’s firmware update conveniently through communication interface. However， no unified bootloader is available for all kinds of microprocessor products. Based on the principle of self-programming NEC 78K0s’ series， a useful Bootloader which is suitable for 78K0/Fx2s’ series MCU is designed，the design can update the application through serial ports.
標(biāo)簽： Bootloader MCU 自編程
上傳時(shí)間： 2013-10-26
上傳用戶：fang2010
本文介紹了基于AT89C52 單片機(jī)的自動(dòng)水溫控制系統(tǒng)的設(shè)計(jì)及實(shí)現(xiàn)過(guò)程。該系統(tǒng)具有實(shí)時(shí)顯示、溫度測(cè)量、溫度設(shè)定并能根據(jù)設(shè)定值對(duì)環(huán)境溫度進(jìn)行調(diào)節(jié)實(shí)現(xiàn)控溫的目的以及達(dá)到上下限溫度報(bào)警功能，控制算法是基于數(shù)字PID 算法。關(guān)鍵詞 ：PID AT89C52 脈寬調(diào)制 實(shí)時(shí) Abstract ： This article describes AT89C52 single-chip microcomputer-basedautomatic water temperature control system design and implementation process. Thesystem has real-time display, temperature measurement, temperature settings and theenvironment in accordance with the temperature settings adjusted to achieve thepurpose of temperature control and reach the upper and lower limits of temperaturealarm function, the control algorithm is based on the digital PID algorithm.Keyword: PID AT89C52 PWM real time
上傳時(shí)間： 2013-10-10
上傳用戶：歸海惜雪
基于AT89C52單片機(jī)的步進(jìn)電機(jī)控制系統(tǒng)設(shè)計(jì) 摘 要: 提出了一個(gè)由AT89C52單片機(jī)控制步進(jìn)電機(jī)的實(shí)例。可以通過(guò)鍵盤(pán)輸入相關(guān)數(shù)據(jù), 并根據(jù)需要, 實(shí)時(shí)對(duì)步進(jìn)電機(jī)工作方式進(jìn)行設(shè)置, 具有實(shí)時(shí)性和交互性的特點(diǎn)。該系統(tǒng)可應(yīng)用于步進(jìn)電機(jī)控制的大多數(shù)場(chǎng)合。實(shí)踐表明, 系統(tǒng)性能優(yōu)于傳統(tǒng)的步進(jìn)電機(jī)控制器。 關(guān)鍵詞: 單片機(jī); 步進(jìn)電動(dòng)機(jī); 直流固態(tài)繼電器; 實(shí)時(shí)控制 ABSTRACT: A stepp ing motor control system based on AT89C52 chip microcomputer was described.The data can be inputwith keyboard, and stepp ingmotorwas controlled by these data. According to the demand, users can set the workingmodel of stepp ingmotor in real2time. This system can be widely used in stepp ing motor controlling. The p ractice showed that the performance of this system outdid the tradi-tional stepp ing motor controller.
上傳時(shí)間： 2013-11-22
上傳用戶：vodssv
The LPC1769/68/67/66/65/64 are ARM Cortex-M3 based microcontrollers for embedded applications featuring a high level of integration and low power consumption. The ARM Cortex-M3 is a next generation core that offers system enhancements such as enhanced debug features and a higher level of support block integration.
上傳時(shí)間： 2014-02-20
上傳用戶：13215175592
MC9S08QG8英文資料 The MC9S08QG8 is the newest member of the Freescale 8-bit family of highly integratedmicrocontrollers, based on the high-performance yet low power HCS08 core. The MC9S08QG8is an excellent solution for power-sensitive applications with extended battery life and maximum performance down to 1.8VDC.
上傳時(shí)間： 2014-12-28
上傳用戶：dxxx
本文介紹了一種基于單片機(jī)的健身車轉(zhuǎn)速測(cè)量系統(tǒng)。該系統(tǒng)具有電路簡(jiǎn)單、使用方便等特點(diǎn)。文中詳細(xì)介紹了該系統(tǒng)的工作原理,并且給出了它的硬件原理圖和軟件設(shè)計(jì)程序框圖。關(guān)鍵詞:轉(zhuǎn)速 單片機(jī) 測(cè)量ABSTRACT :This paper introduces a measuring system of the rotational velocity of exercise bike based on single - chip microcomputer . It has such advantages : simple circuit ,convenient use and so on. The work principle is presented in detail in this paper and the block diagram of hardware and program flow chart are giv2 en as well .KEYWORDS :Rotational velocity Single - chip microcomputer Measuring
標(biāo)簽： 單片機(jī) 中的應(yīng)用 轉(zhuǎn)速測(cè)量
上傳時(shí)間： 2013-11-02
上傳用戶：源弋弋
匯編器在微處理器的驗(yàn)證和應(yīng)用中舉足輕重，如何設(shè)計(jì)通用的匯編器一直是研究的熱點(diǎn)之一。本文提出了一種開(kāi)放式的匯編器系統(tǒng)設(shè)計(jì)思想，在匯編語(yǔ)言與機(jī)器語(yǔ)言間插入中間代碼CMDL（code mapping description language）語(yǔ)言，打破匯編語(yǔ)言與機(jī)器語(yǔ)言的直接映射關(guān)系，由此建立起一套描述匯編語(yǔ)言與機(jī)器語(yǔ)言的開(kāi)放式映射體系。基于此開(kāi)放式映射體系開(kāi)發(fā)了一套匯編器系統(tǒng)，具有較高層次上的通用性和可移植性。【關(guān)鍵詞】指令集，CMDL，匯編器，開(kāi)放式 Design of Retargetable Assembler System Liu Ling Feng Wen Nan Wang Ying Chun Jiang An Ping Ji Li Jiu IME of Peking University, 100871【摘要】An assembler plays a very important role in the field of microprocessor verifications and applications, thus how to build a retargetable assembler system has been a hotspot in this field for long time. This paper presents a new method about the retargetable assembler system design.It provides a kind of language CMDL, code mapping description language. During the process of assembling, assembler languages are firstly translated to CMDL, and then mapped to the machine codes. In an other word, CMDL is inserted between assembler languages and machine codes during the translation procedure. As a medium code, CMDL has a lot of features, such as high extraction, strong descript capabilities. It can describe almost all attributes of assembler languages. By breaking the direct mapping relationship between assembler languages and machine codes, the complexities of machine codes are hided to the users, therefore, the new retargetable assembler system has higher retargetable level by converting the mapping from assembler languages and machine codes to assembler languages and CMDL, and implementationof it becomes easier. Based on the new mapping system structure, a retargetable assemblersystem is developed. It proved the whole system has good retargetability and implantability.【關(guān)鍵詞】instruction set, symbol table, assembler, lexical analysis, retargetability
上傳時(shí)間： 2013-10-10
上傳用戶：meiguiweishi
Luminary Micro provides an analog-to-digital converter (ADC) module on some members of theStellaris microcontroller family. The hardware resolution of the ADC is 10 bits; however, due to noiseand other accuracy-diminishing factors, the true accuracy is less than 10 bits. This application noteprovides a software-based oversampling technique, resulting in an improved Effective Number OfBits (ENOB) in the conversion result. This document describes methods of oversampling an inputsignal, and the impact on precision and overall system performance.
標(biāo)簽： Oversampling Techniques ADC fo
上傳時(shí)間： 2013-12-17
上傳用戶：zhyiroy
Luminary Micro Stellaris™ microcontrollers that are equipped with an analog-to-digital converter(ADC), use an innovative sequence-based sampling architecture designed to be extremely flexible,yet easy to use. This application note describes the sampling architecture of the ADC. Sinceprogrammers can configure Stellaris microcontrollers either through the powerful StellarisFamilyDriver Library or through direct writes to the device's control registers, this application note describesboth methods. The information presented in this document is intended to complement the ADCchapter of the device datasheet, and assumes the reader has a basic understanding of howADCsfunction.
標(biāo)簽： Microcontr Stellaris Using the
上傳時(shí)間： 2013-10-14
上傳用戶：blans
本文依據(jù)集成電路設(shè)計(jì)方法學(xué)，探討了一種基于標(biāo)準(zhǔn)Intel 8086 微處理器的單芯片計(jì)算機(jī)平臺(tái)的架構(gòu)。研究了其與SDRAM，8255 并行接口等外圍IP 的集成，并在對(duì)AMBA協(xié)議和8086 CPU分析的基礎(chǔ)上，采用遵從AMBA傳輸協(xié)議的系統(tǒng)總線代替?zhèn)鹘y(tǒng)的8086 CPU三總線結(jié)構(gòu)，搭建了基于8086 IP 軟核的單芯片計(jì)算機(jī)系統(tǒng)，并實(shí)現(xiàn)了FPGA 功能演示。關(guān)鍵詞：微處理器； SoC；單芯片計(jì)算機(jī)；AMBA 協(xié)議 Design of 8086 CPU Based Computer-on-a-chip System（School of Electrical Engineering and Automation, Heifei University of Technology, Hefei, 230009,China）Abstract: According to the IC design methodology, this paper discusses the design of one kind of Computer-on-a-chip system architecture, which is based on the standard Intel8086 microprocessor,investigates how to integrate the 8086 CPU and peripheral IP such as, SDRAM controller, 8255 PPI etc. Based on the analysis of the standard Intel8086 microprocessor and AMBA Specification,the Computer-on-a-chip system based on 8086 CPU which uses AMBA bus instead of traditional three-bus structure of 8086 CPU is constructed, and the FPGA hardware emulation is fulfilled.Key words: Microprocessor; SoC; Computer-on-a-chip; AMBA Specification
標(biāo)簽： 8086 CPU 單芯片 計(jì)算機(jī)系統(tǒng)
上傳時(shí)間： 2013-12-27
上傳用戶：kernor
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