硬件电路设计之主芯片选型 平台的选择很多时候和系统选择的算法是相关的,所以如果要提高架构,平台的设计能力,得不断提高自身的算法设计,复杂度评估能力,带宽分析能力。 常用的主处理器芯片有:单片机,ASIC,RISC(DEC Alpha、ARC、ARM、MIPS、PowerPC、SPARC和SuperH ),DSP和FPGA等,这些处理器的比较在网上有很多的文章,在这里不老生常谈了,这里只提1个典型的主处理器选型案例
上传时间: 2013-11-05
上传用户:HGH77P99
针对盘山路存在的转弯盲区,即在转弯时司机无法得知弯路对面是否有车辆通过,设计一种基于C8051F310的山路转弯预防警示系统。该系统利用一阶滤波算法检测山路转弯时是否有车辆通过。运用该算法可增强系统检测的实时性,提高检测机动车辆的灵敏度,同时大大减少环境温度对检测的干扰。试验表明该系统能够正确指示出在山路转弯时是否有车辆通过,目前该系统已安装在盘山路上,可大大减少事故的发生率。 Abstract: Aiming at passing hilly road,there is a turn blind spot.Motormen usually do not know if the passing of vehicles pass the road.So a system of defending accident on hilly road is designed,which is based on MCU C8051F310.The sys-tem uses the first-order filter algorithm to detect whether there are passing vehicles.This algorithm enhances the real-time detection and improves the sensitivity of detection vehicles.Meanwhile,it reduces the detection interference of environmen-tal temperature.The experimental results show that this system can exactly indicate if there are passing vehicles.At present,the system has been successfully applied to hilly road.The system can greatly decrease accident.
上传时间: 2013-10-10
上传用户:归海惜雪
在PIC16F877单片机的数据存储器RAM中,总的地址空间是512个字节,但真正用作为通用寄存器单元个数为--字节。
上传时间: 2013-11-14
上传用户:xc216
第一部分概述 功能简介 LED图文编辑系统是专为LED脱机显示屏设计的一套功能强大,使用方便,简单易学的LED电子显示屏节目制作、编辑软件,支持多区域显示、多节目播放、多显示屏发送;支持多种文件格式:文本文件,WORD、XLS、RTF文件,图片文件(BMP/JPG/...),表格显示,时钟显示(模拟/数字),计时显示(正计时/倒计时).
上传时间: 2013-11-22
上传用户:qijian11056
概述 LPC900 FLASH单片机,是PHILIPS公司推出的一款高性能、微功耗51内核单片机,主要集成了字节方式的I2C总线、SPI总线、增强型UART接口、比较器、实时时钟、E2PROM、AD/DA转换器、ISP/IAP在线编程和应用中编程等一系列有特色的功能部件。LPC900系列单片机提供从8脚DIP到28脚的PLCC等丰富的封装形式,可以满足各种对成本、线路板空间有限制而又要求高性能、高可靠性的应用。且其具有高速率(6倍于普通51单片机),低功耗(完全掉电模式功耗低于1uA),高稳定性,小封装,多功能(内嵌众多流行的功能模块),多选择等特点(该系列有多款不同封装,不同价位,不同功能的型号供用户选择)。
上传时间: 2013-11-04
上传用户:Miyuki
介绍一种以MSP430单片机为基础的智能频率测量系统,采用硬件逻辑与软件指令相结合的方式控制闸门,实现0 MHz~10 MHz范围内无档切换的等精度测量。 Abstract: An intelligent frequency measurement system based on MSP430 singlechip is introduced. The system uses a way that can combine hardware logic and software instructions to contronl the strobe ,and completes the functions of equal precision in the range of 0MHz~10MHz without shifting
上传时间: 2013-10-28
上传用户:dbs012280
介绍一种基于单片机的多路温度采集及监控系统,能够测量6路温度信号,具有计算机联网功能,各测量点可以单独监控和设置,可根据用户的需求自动控制。测量温度范围为-10 ℃~200 ℃,控制方式采用模拟量调压模式。该系统具有控制精度高、冲击小等特点。 Abstract: A temperature collecting and surveillance-controlling system based on sing-chip microcomputer is introduced. It can measure 6 channel signal of the temperature,and it has a function of network connection.The temperature measure points can be monitored and located, it can be controlled automatic according to user’s demand.The temperature range is -10℃ to 200℃.The model of control is adjustable voltage with simulation. It features high precision and little impact.
上传时间: 2013-10-23
上传用户:bjgaofei
出了一种利用ATmega8单片机对ISD2500系列语音芯片进行控制的智能语音系统,此系统使用灵活,易于功能升级,具有良好的应用前景。提供了硬件连接电路和关键源程序。 Abstract: An intelligent voice system using ISD2500 series voice chips based on ATmega8 MCU is described.This system is flexible and easy to upgrade for users,and it has pretty good using foreground. The circuit diagram and the key program are also provided.
上传时间: 2014-01-22
上传用户:Artemis
为解决输油管道温度压力参数实时监测的问题,设计了以C8051F930单片机作为控制核心的超低功耗输油管道温度压力远程监测系统。现场仪表使用高精度电桥采集数据,通过433 MHz短距离无线通信网络与远程终端RTU进行通信,RTU通过GPRS网络与PC上位机进行远程数据传输,在上位机中实现数据存储和图形化界面显示,从而实现输油管道温度压力参数的实时监测和异常报警。经实验证明,该系统的12位数据采集精度满足设计要求,漏码率小于1%,正常工作时间超过5个月,能实时有效地监测输油管道的温度压力参数,节省大量人工成本,有效预防管道参数异常造成的经济损失和环境污染。 Abstract: In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters, the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection, the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU, the GPRS was used by the RTU to transmit data to the PC host computer, and the data was stored and displayed in the PC host computer, so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time, it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.
上传时间: 2013-11-07
上传用户:cuibaigao
导言本书的对象主要是希望从事单片机软件开发的人员,当然不是只限于这些人员才可以看,只要你有兴趣,哪怕你想成为一名炒菜的大师傅或者已经是大师傅,我一样欢迎你来阅读本书。 当我还是后生仔的时候,虽然也常做一些某年某月自己能呼风唤雨或腰缠万贯的白日梦,在内心还是想能去传道授业,哪怕是当个大和尚,面对虚心而来请教的人众,该是何等惬意的事情。然而天生不善言辞,更是拙于笔墨,担心误了他人前程而作罢。 可谓江山易改、本性难移,虽然没去当成大和尚,可时不时还想起这个愿望。一天看到台湾侯捷(侯俊杰)写的《深入浅出MFC》,在我看来这书写得那叫一个好,如果我也能写出这样的书简直是太伟大了。
标签: 单片机
上传时间: 2013-10-24
上传用户:kqc13037348641