单片机入门知识手册 说到单片机，首先想到的是中央处理器（CPU），学过微型计算机的人都知道，CPU是计算机最核心的部分，它可以完成算术运算和逻辑运算，CPU再配上外部存储器，输入输出单元就构成一台微型计算机。其实单片机可以看成一台微型计算机，它具有CPU的功能，并且自身带有存储器，带有输入输出接口（如串行UART、AD转化、PWM控制），单片机配上一些简单的外围电路，就可以完成智能控制或数据采集等。所以，单片机的英文名叫MCU（Micro Chip Uint），翻译成中文是微控制单元。 单片机能干什么？通俗一点讲，单片机只有两个功能：一个是数据采集，另一个是控制。其实都很好理解，数据采集实际上是从外间输入，如从AD（模数转化）口读入一个电压值，从串口接收一个数据等等。控制实际上是输出，51单片机有32个IO口，每个IO口可以驱高或驱低，单片机以此来实现对外间的控制。一个单片机系统都可以用下面这个框图来说明：
上传时间： 2013-10-26
上传用户：zhaoman32
Luminary Micro公司 Stellaris所提供一系列的微模块是首款基于ARM® Cortex™-M3的模块.Stellaris LM3S2000系列是针对CAN应用方案而设计的一组芯片，它在群星系列芯片的基础上扩展了Bocsh CAN网络技术——短距离工业网络里的黄金标准。Stellaris LM3S2000系列芯片还标志着先进的Cortex-M3内核和CAN能力的首次结合运用。
上传时间： 2013-10-08
上传用户：zengduo
Luminary Micro在Stellaris系列微控制器的部分产品中提供了模数转换器（ADC）模块。ADC的硬件分辨率为10位，但由于噪音和其它使精度变小的因素的影响，实际的精度小于10位。本应用文档提供了一个基于软件的过采样技术，从而使转换结果的有效位数（ENOB）得到了改善。文档中描述了对输入信号执行过采样的方法，以及在精度和整个系统性能上的影响。
上传时间： 2014-05-07
上传用户：drink！
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.
标签： Oversampling Techniques ADC fo
上传时间： 2013-12-17
上传用户：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.
标签： Microcontr Stellaris Using the
上传时间： 2013-10-14
上传用户：blans
SPCE061A采用的内核 SPCE061A采用的内核（CPU）为μ‘nSP。 μ‘nSP（读做micro-n-S-P）是凌阳科技推出的16位微处理器，它的突出特点是较高的处理速度，这就使其有能力进行复杂的数字信号处理（DSP，Digital Signal Processing）。 μ‘nSP内核由凌阳自主开发，因而也具备它自己的指令系统。 指令系统.61 3.1 指令系统的概述及符号约定.61 3.2 数据传送指令62 3.3 算术运算..66 3.3.1 加法运算..67 3.3.2 减法运算..68 3.3.3 带进位的加减运算.70 3.3.4 取补运算..70 3.3.5 SPCE061A的乘法指令.71 3.3.6 SPCE061A的n项内积运算指令.71 3.3.7 比较运算(影响标志位N,Z,S,C)..73 3.4 SPCE061A的逻辑运算.74 3.4.1 逻辑与..74 3.4.2 逻辑或..75 3.4.3 逻辑异或..76 3.4.4 测试（TEST）.78 3.4.5 SPCE061A的移位操作.80 3.5 SPCE061A的控制转移类指令..83 3.6 伪指令86 3.6.1 伪指令的语法格式及特点..87 3.6.2 伪指令符号约定..87 3.6.3 标准伪指令.87 3.6.4 宏定义与调用98 3.6.5 段的定义与调用101 3.6.6 结构的定义与调用..102 3.6.7 过程的定义与调用..106 3.6.8 伪指令的应用举例..106
上传时间： 2013-10-31
上传用户：xuanchangri
The μPSD32xx family, from ST, consists of Flash programmable system devices with a 8032 MicrocontrollerCore. Of these, the μPSD3234A and μPSD3254A are notable for having a complete implementationof the USB hardware directly on the chip, complying with the Universal Serial Bus Specification, Revision1.1.This application note describes a demonstration program that has been written for the DK3200 hardwaredemonstration kit (incorporating a μPSD3234A device). It gives the user an idea of how simple it is to workwith the device, using the HID class as a ready-made device driver for the USB connection.IN-APPLICATION-PROGRAMMING (IAP) AND IN-SYSTEM-PROGRAMMING (ISP)Since the μPSD contains two independent Flash memory arrays, the Micro Controller Unit (MCU) can executecode from one memory while erasing and programming the other. Product firmware updates in thefield can be reliably performed over any communication channel (such as CAN, Ethernet, UART, J1850)using this unique architecture. For In-Application-Programming (IAP), all code is updated through theMCU. The main advantage for the user is that the firmware can be updated remotely. The target applicationruns and takes care on its own program code and data memory.IAP is not the only method to program the firmware in μPSD devices. They can also be programmed usingIn-System-Programming (ISP). A IEEE1149.1-compliant JTAG interface is included on the μPSD. Withthis, the entire device can be rapidly programmed while soldered to the circuit board (Main Flash memory,Secondary Boot Flash memory, the PLD, and all configuration areas). This requires no MCU participation.The MCU is completely bypassed. So, the μPSD can be programmed or reprogrammed any time, anywhere, even when completely uncommitted.Both methods take place with the device in its normal hardware environment, soldered to a printed circuitboard. The IAP method cannot be used without previous use of ISP, because IAP utilizes a small amountof resident code to receive the service commands, and to perform the desired operations.
标签： Demonstration 3200 USB for
上传时间： 2014-02-27
上传用户：zhangzhenyu
This application note shows how to write an Inter Integrated Circuit bus driver (I²C) for the Philips P90CL301micro-controller.It is not only an example of writing a driver, but it also includes a set of application interface software routines toquickly implement a complete I²C multi-master system application.For specific applications the user will have to make minimal changes in the driver program. Using the drivermeans linking modules to your application software and including a header-file into the application sourceprograms. A small example program of how to use the driver is listed.The driver supports i.a. polled or interrupt driven message handling, slave message transfers and multi-mastersystem applications. Furthermore, it is made suitable for use in conjunction with real time operating systems, likepSOS+.
上传时间： 2013-11-23
上传用户：weixiao99
The P90CL301 is a highly integrated 16/32 bit micro-controller especially suitable for applications requiring lowvoltage and low power consumption. It is fully software compatible with the 68000. Furthermore, it provides bothstandard as well as advanced peripheral functions on-chip.One of these peripheral functions is the I2C bus. This report describes worked-out driver software (written in C) toprogram the P90CL301 I2C interface. It also contains interface software routines offering the user a quick start inwriting a complete I2C system application.
上传时间： 2014-01-06
上传用户：气温达上千万的
随着单片机开发技术的不断发展，目前已有越来越多的人从普遍使用汇编语言到逐渐使用高级语言开发，其中主要是以C语言为主，市场上几种常见的单片机均有其C语言开发环境。这里以最为流行的80C51单片机为例来学习单片机的C语言编程技术。大家都有C语言基础,但是编单片机程序,大家还得找专门的书来学习一下。这里我们只介绍Keil这种工具软件的用法。学习一种编程语言，最重要的是建立一个练习环境，边学边练才能学好。Keil软件是目最流行开发80C51系列单片机的软件，Keil提供了包括C编译器、宏汇编、连接器、库管理和一个功能强大的仿真调试器等在内的完整开发方案，通过一个集成开发环境（µVision）将这些部份组合在一起。下面我以一个实验举一个例子，一步一步学习Keil软件的使用。 首先我们看硬件原理图： 很明显，要点亮使发光二极管，必须使单片机的I/O口P1.0输出低电平。于是我们的任务就是编程序使P1.0输出地电平。1. 使用Keil前必须先安装。安装过程简单，这里不在叙述。2. 安装好了Keil软件以后，我们打开它。打开以后界面如下：
上传时间： 2013-11-07
上传用户：wtrl
