基于ARM7的GPRS实验代码(LCD320,键盘,I2C总线)

proteus中LCD--HDM32GS12b的仿真及源码.-Proteus in the simulation and LCD HDM32GS12b source.

51系列单片机的软件串口模拟程序代码，可以实现串口扩展功能，经过项目验证可以直接放心使用，用c写成-51 series microcontroller simulation software serial code, can achieve serial expansion function, After certification projects can directly worry about, written with c

1602 driver example

1602液晶显示的源程序，很是经典，不信你下下看-1602 Liquid Crystal Display

随着经济的发展和人民生活水平的提高，自动门的应用也越来越广泛，它已经成为宾馆、超市等现代建筑所必备的，是建筑智能化水平的重要指标。自动门控制系统作为自动门系统的控制核心，决定了自动门系统的性能。国外生产的自动门控制系统性能比较优良，但是价格偏高；国内的同类产品虽然价格便宜，但是性能较差，故障率较高。本文研究一种基于AT89C51的自动门控制系统，功能强大，运行可靠，用户操作方便，而且成本适中，在市场上有较强的竞争力-With the economic development and improve the living standards of the people, automatic door applications more and more widely, it has become a hotel, supermarket, etc. necessary for a modern building, is building an important indicator of the level of intelligence. Automatic door automatic door control system as the core control system, determines the performance of automatic door systems. Foreign production of automatic door control system for excellent performance, but the high price While the domestic price of similar products, but poor performance, a higher failure rate. In this paper, AT89C51-based automatic door control system, powerful, reliable operation and user convenience, and the cost of modest, there is strong in the market on the competitiveness of

c8051f120_ad采样程序 ，很好用的-c8051f120_ad sampling procedures, well used

MCS-51单片机有5个中断源，其中两个是由-INT0、-INT1引脚输入的外部中断源；另外三个是内部中断源即由T0、T1的溢出引起中断和串行口发送完一个字节或接收到一个字节数据引起中断。触发外部中断有两种方式，即下降沿引起中断或低电平引起中断。当编程TCON中的ITi（i=0、1）为1时，则引起触发的方式为边沿触发方式，反之(ITi=0)为低电平触发方式。每个中断源的中断请求能否得到响应要受两级“开关”的控制，即一个总“开关”-MCS-51 single-chip has five interrupt sources, two of which are by-INT0,-INT1 pin input external interrupt source the other three internal interrupt sources from the T0, T1 overflow caused by the disruption and serial port sending or receiving end of a byte to a byte of data caused by interruption. Triggered external interrupt has two modes, namely, falling edge or low-level disruption caused disruption caused. When programming TCON in ITi (i = 0,1) for the 1:00 has been the subject of a way to trigger the way to the edge of the trigger, on the contrary (ITi = 0) for low-level trigger mode. Each interrupt source interrupt request can be subject to levels in response to

单片机中看门狗程序，在该程序中再加入一些子程序可以实现-MCU watchdog procedures, in the process of adding some subroutines can be achieved

插在usb上使用的声卡的原理图,器件少,简单实用

msp430f169 中断方式驱动独立键盘-msp430f169 separate keyboard interrupt-driven