针对目前使用的RS232接口数字化B超键盘存在PC主机启动时不能设置BIOS,提出一种PS2键盘的设计方法。基于W78E052D单片机,采用8通道串行A/D转换器设计了8个TGC电位器信息采集电路,电位器位置信息以键盘扫描码序列形式发送,正交编码器信号通过XC9536XL转换为单片机可接收的中断信号,软件接收到中断信息后等效处理成按键。结果表明,在满足开机可设置BIOS同时,又可实现超声特有功能,不需要专门设计驱动程序,接口简单,成本低。 Abstract: Aiming at the problem of the digital ultrasonic diagnostic imaging system keyboard with RS232 interface currently used couldn?蒺t set the BIOS when the PC boot, this paper proposed a design method of PS2 keyboards. Based on W78E052D microcontroller,designed eight TGC potentiometers information acquisition circuit with 8-channel serial A/D converter, potentiometer position information sent out with keyboard scan code sequentially.The control circuit based on XC9536 CPLD is used for converting the mechanical actions of the encoders into the signals that can be identified by the MCU, software received interrupt information and equivalently treatmented as key. The results show that the BIOS can be set to meet the boot, ultrasound specific functionality can be achieved at the same time, it does not require specially designed driver,the interface is simple and low cost.
上传时间: 2013-10-10
上传用户:asdfasdfd
从系统硬件设计和软件构成上,介绍一种以AT89C52单片机为核心,通过无线遥控方法实现对预设电话自动拨号报警的智能呼救系统。系统提供了患者在紧急情况下无法使用电话报警时的一种报警手段。由用户预设的多组电话号码作为语音报警对象,预录可长达20 s的语音信号来说明患者所处地点及病情,并通知患者家人。 Abstract: This paper introduces a intelligent alarming system which is realized by wireless remote control system.This system chiefly consists of AT89C51 the system can processor.User can input several groups of telephone number regarded as alarming objects,The system can record some information 20 seconds to tell the site of the patient.And notice the rokonok of the patient.
上传时间: 2013-11-19
上传用户:wd450412225
介绍了电力操作电源与智能电池巡检系统的特点,给出了一种基于超低功耗单片机MSP430 F149针对中小型变电站自动化运行的专用设备的基本设计原理及实现方法,最后给出了详细硬件构成和软件实现。该系统能满足中小型变电站安全、可靠、自动运行的要求,并通过与上位机的串行通信实现变电站的远程管理和控制。 Abstract: The characters of the intelligent battery data logging system of the electric operation power are introduced.The basic design principle and the implemented methods of the special equipment which only designed for the middle or small transformer substation based on MSP430F149 are prescribed. Finally, the hardware block diagram and the software flow chart are also given. The function that the system finally needs to realize can basically meet with the middle or small transformer substation’s satisfy, reliably,and automatic running.And it can also realize the transformer substation long-distance management and control by serial communicating with the host computer.
上传时间: 2013-11-25
上传用户:黄华强
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
对智能仪器系统中的在系统编程(ISP)技术及其在仪器系统中在线编程的实现、应用前景等进行了分析。介绍了P89C669相对于传统51系列单片机的增强特性,并给出P89C669快闪存储器的ISP实现电路和具体方法。结合实际介绍了一种可以在系统编程的智能键盘、数码管显示系统。
上传时间: 2013-12-27
上传用户:LouieWu
摘要:设计以ATmega16单片机为核心的自动对靶控制系统。该系统利用PC机作为上位机,控制摄像头定时摄取图像,利用2g-r-b颜色特征分割该彩色图像,当绿色颜色分量大于预设阀值时,便判定摄像头下有靶标,用PC机的串口通信系统发送指令到单片机,延迟预设的时间后,控制执行机构进行喷雾,实现自动对靶喷雾,并且可以设定延迟时间,从而实现在不同行走速度下的自动对靶喷雾。关键词:自动对靶;AVR;串口通信;颜色分割
上传时间: 2014-12-27
上传用户:redmoons
[摘要]文章结合小型胶订包本机和书本胶订工艺流程,以89C51单片机作为控制核心。采用光电耦合器TLP521输入,继电器输出,开发了无线胶订包本机的控制系统。同时在控制软件设计中,增加了运转保护、抗干扰和故障监测功能,保证了系统工作质量的稳定与可靠。关键词:89C51;无线胶订;智能控制
上传时间: 2014-12-27
上传用户:鱼哥哥你好
摘要:本文详细叙述了基于FPGA及单片机K实现时码终端系统的设计方法,该系统可用于对国际通用时间格式码IRIG码(简称B码)的解调,以及产生各种采样、同步频率信号,也可作为其它系统的时基和采样、同步信号的基准。关键词:单片机;IRIG-B格式码;FPGA;解调;控制;接口
上传时间: 2013-12-16
上传用户:CSUSheep
摘要:介绍了由AT89C51和一些外围器件组成的智能门锁控制系统。较为详细地阐述了系统的设计思路,并时部分硬件电路进行了分析和介绍。该系统可以自动完成读卡、识剐用户、开锁、自动报警等功能,运行稳定可靠。关键词:控制系统;智能门锁;AT98C51单片机;读卡器;串口通信
上传时间: 2013-10-14
上传用户:bruce5996
介绍了以AT89C51单片机作为控制核心的自动拨号、检测和放音的智能语音拨号报警系统。重点论述了自动拨号和语音部分的电路结构、工作原理和软件设计方法。
上传时间: 2013-10-23
上传用户:lilei900512