PROFIBUS主从程序

单片机usb2.0通讯-the conmunication of MCU by USB2.0

rp89comdd mcs51单片机源码一堆-rp89comdd mcs51 SCM source heap

开发板上跑的俄罗斯方块，有图片，源码。通过VGA接口输出。 -Development board to run the Russian box, has pictures, source code. Output through the VGA interface.

keil8.0的汉化，只是汉化菜单，其帮助文件没有汉化-keil8.0 a Chinese, a Chinese menu only, to help document does not finished

标准51单片机用定时器产生PWM波形实现led渐亮渐灭-Standard 51 MCU generate PWM waveforms using Timer led gradually to achieve gradual eradication of light

在单片机中，处理串口的子程序-in SCM, the serial processing subroutine

名称：继电器程序 功能：控制两个继电器轮流闭合，断开 分别由两个继电器控制的LED闪烁 -Name: Relay program features: control two relays alternately closed, disconnect the relay controlled by two LED flashes

电源采样控制，通讯的简单程序，运行环境c51,-Power sampling control, communications, simple procedures, operating environment c51,

程序能够实现将十二位的二进制数5V对应fffH变换成一路0~5V的电压。 精度方面：在使用时上下波动范围大约是0~2fH能保证高位寄存器准确； 调试过程中遇到了一系列问题：（1）p0口的使用需接上拉电阻，内部没有带电阻；（2）调试的过程最好使用单步运行，以便于察看寄存器的内容；（3）对系统板不熟悉，一些硬件方面容易出问题，像口连接，电源、地的连接。（4）直流电源使用不准确，内部的各个电源输出是独立的，需要共地。 -procedures to achieve 12 to a binary number 5V counterparts fffH transform all the way into the 0- 5V voltage. Accuracy : the use of fluctuating ranges of 0 ~ 2fH can guarantee accurate high register; debugging process encountered a series of questions : (1) p0 I need to connect to the widening use of resistance, with no internal resistance; (2) the process of commissioning the best use of single-step operation, in order to inspect the contents of Register; (3) The right not familiar with the system board, Some hardware problems are likely to occur, such as connectors, power, and connectivity. (4) DC power supply use of inaccurate, all within the Power output is independent, to the total needs.