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PC机之间串口通信的实现一、实验目的 １．熟悉微机接口实验装置的结构和使用方法。 ２．掌握通信接口芯片8251和8250的功能和使用方法。 ３．学会串行通信程序的编制方法。 二、实验内容与要求 １．基本要求主机接收开关量输入的数据（二进制或十六进制），从键盘上按“传输”键（可自行定义），就将该 ...

All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, howeve ...

The 87LPC76X Microcontroller combines in a small package thebenefits of a high-performance microcontroller with on-boardhardware supporting the Inter-Integrated Circuit (I2C) bus interface.The 87LPC76X can be programmed both as an I2C bus master, aslave, or both. An overview of the I2C bus and descr ...

本文介绍使用AT89C2051 制作的一种发音电路, 各种声音通过编程实现, 灵活方便。原理图如图1 所示。图1　发音电路原理该电路利用方波谐波成份丰富的特点,编程采用计时器延迟法发音, 即每个音的半周期计时中断一次, 而使输出P110 (或其他IöO 口) 反相, 重复执行产生某种频率的信号。例如: 中音DO 的频率为523Hz, 其周期 ...

第1章 单片机系统概述1.1 AVR系列单片机的特点1.2 AT90系列单片机简介第2章 AT90LS8535单片机的基础知识2.1 AT90LS8535单片机的总体结构2.1.1 AT90LS8535单片机的中央处理器2.1.2 AT90LS8535单片机的存储器组织2.1.3 AT90LS8535单片机的I/O接口2.1.4 AT90LS8535单片机的内部资源2.1.5 AT90LS8535单片机的时钟电路2.1.6 AT90 ...

载波相移正弦脉宽调制（SPWM）技术是一种适用于大功率电力开关变换装置的高性能开关调制策略，在有源电力滤波器中有良好的应用前景。本文介绍了如何利用高性能数字信号处理器TMS320F28335的片内外设事件管理器（EV）模块产生三相SPWM波，给出了程序流程图及关键程序源码。该方法采用不对称规则采样算法，参数计算主要采用查 ...

There has long been a need for portable ultrasoundsystems that have good resolution at affordable costpoints. Portable systems enable healthcare providersto use ultrasound in remote locations such asdisaster zones, developing regions, and battlefields,where it was not previously practical to do so ...

Field Programmable Gate Arrays (FPGAs) are becoming a critical part of every system design. Many vendors offer many different architectures and processes. Which one is right for your design? How do you design one of these so that it works correctly and functions as you expect in your entire system ...

UART 4 UART参考设计，Xilinx提供VHDL代码 uart_vhdl This zip file contains the following folders:  \vhdl_source  -- Source VHDL files:      uart.vhd  - top level file      txmit.vhd - transmit portion of uart  &nb ...

The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8!   Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, s ...