PSHLY-B回路电阻测试仪介绍
上传时间: 2013-11-05
上传用户:木子叶1
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
特点: 精确度0.05%满刻度±1位數 可量测交直流电流/交直流电压/电位计/Pt-100/热电偶/荷重元/电阻等信号 热电偶SENSOR输入种类J/K/T/E/R/S/B可任意规划 显示范围-19999-99999可任意规划 小数点可任意规划 尺寸小,稳定性高 CE认证
上传时间: 2013-10-31
上传用户:wsq921779565
用Borland C写的B-Tree算法
上传时间: 2014-12-05
上传用户:xzt
《3D Engine Design》的随书源代码,包含完整的3D引擎的源代码
上传时间: 2015-01-05
上传用户:libinxny
《Realtime Rendering》的随书源代码,包含完整的3D引擎的源代码,及使用文档
上传时间: 2015-01-05
上传用户:lxm
嵌入式操作系统SMALL RTOS51 的例程, 运行于UV2运用WAVE的6000进行仿真
上传时间: 2015-01-05
上传用户:xlcky
C编译器源代码(超级牛b)
上传时间: 2015-01-16
上传用户:王楚楚
B/S结构的网上学生选课系统
标签:
上传时间: 2015-02-05
上传用户:15071087253
B样条曲线类,使曲线绘制更平滑
标签: 绘制
上传时间: 2014-01-11
上传用户:eclipse