68+PS2单片机键盘原理图
上传时间: 2014-12-26
上传用户:uuuuuuu
矩阵键盘
上传时间: 2013-10-23
上传用户:waixingren
智能仪器是指内含微机(目前最适合的是单片机)和GP-IB接口的电子仪器。本书介绍以MCS-51单片机为核心的智能仪器的工作原理和设计方法。书中详细介绍了智能仪器中模拟放大电路,A/D、D/A转换器与单片机的接口设计,常用的输入输出设备(如键盘、LED、LCD、CRT显示器、微型打印机、语音处理器等)与单片机的接口技术,还深入地讨论了监控主程序和接口管理主程序的设计,常用的测量算法及优化系统性能的高精确度、高抗干扰和低功耗的设计方法。这些方法也适用于一般的单片机应用系统设计。 本书内容新颖、实用、文字精炼、通俗易懂,可作为工科院校的电子、电气、机电、仪器仪表、检测控制等专业的教科书或参考书,也可代从事智能仪器或单片机应用的研究人员和工程技术人员阅读。
上传时间: 2013-11-09
上传用户:qwerasdf
关于一种氢气传感器的使用,可以用于工业、实验室检测漏气,具有很强实用性。
上传时间: 2014-12-26
上传用户:天诚24
矩阵键盘电路的改进
标签: 矩阵键盘电路
上传时间: 2013-10-20
上传用户:comer1123
本人的毕业设计论文,利用单片机AT89S52和温湿度传感器DHT11,实现温湿度检测、报警以及发送至PC,而且还有供电电源的设计。 内容很全面,有完整的keil C51程序以及电路图等,欢迎参考,指出不足。
上传时间: 2013-10-16
上传用户:ssz1990
89c51一种用N+1条线实现矩阵键盘
标签: 矩阵键盘
上传时间: 2014-12-26
上传用户:lhw888
为了提高传统温度控制系统的性能,将PID控制理论与嵌入式系统相结合,采用瑞萨电子公司的H8S/2166作为核心处理器,AD公司的AD7705以及热敏电阻温度传感器作为温度检测单元,利用4×6小键盘、LCD显示器和S1D13305液晶控制器达到良好的人机交互,设计出了一个应用于化工领域的嵌入式实时温度控制系统。相比于传统温度控制系统,该系统提供了更强的计算能力和可扩展能力,采用增量PID控制算法实现复杂控制。通过实验,该系统能达到0.1 ℃的温度控制精度以及小于120 s的温度稳定时间。 Abstract: In order to improve the performance of conventional temperature control system, combining PID control theory with embedded systems, using the Renesas Electronics Corp. H8S/2166 micro-controller as a core processors, AD7705 and thermistor temperature sensor as a temperature detection unit and 4×6 small keyboard, LCD and S1D13305 LCD controller as a good human-computer interaction, this paper designed an embedded real-time temperature control system which is applied in chemical industry. Compared with conventional temperature control system, this system provides more computing power and extensibility, and adopts PID control algorithm for complex control. Through the experiment, the system can reach temperature control accuracy of 0.1 ℃ and temperature stabilization time of less than 120 seconds.
上传时间: 2014-12-26
上传用户:003030
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
在深入了解Flash存储器的基础上,采用单片机自动检测存储器无效块。主要通过读取每一块的第1、第2页内容,判断该块的好坏,并给出具体的实现过程,以及部分关键的电路原理图和C语言程序代码。该设计最终实现单片机自动检测Flash坏块的功能,并通过读取ID号检测Flash的性能,同时该设计能够存储和读取1GB数据。 Abstract: On the basis of in-depth understanding the Flash chips,this paper designs a new program which using the SCM to detect the invalid block.Mainly through reading the data of the first and second page to detect the invalid block.Specific implementation procedure was given,and the key circuit schematic diagram and C language program code was introduced.This design achieved the function of using the MCU checks the invalid block finally,and increased the function by reading the ID number of Flash to get the performance of the memory.And the design also can write and read1GB data
上传时间: 2013-10-25
上传用户:taozhihua1314