关于pwm波的产生

Rensas SH3系列SH7709开发板初始化示例程序-Rensas SH3 Series SH7709 development board initialization sample program

欧姆龙PLC的视频教程，它对学习PLC有很好的帮助，这是第5集。-Omron PLC" s video tutorial, its a very good learning PLC help, this is the first 5 sets.

关于rtlinux安装的介绍文档 大家分享 看看吧-With regard to the introduction rtlinux installation documentation to share with you what we" ve learned

51的SPI程序源代码-source code

此程序需要从麦克风输入、 分析信号，然后将其发送的音频输出。可能配置各种参数，例如 FRAMES_PER_BUFFER、 SAMPLE_RATE、 NUM_CHANELS 等。

用keil编写arm源代码，可以方便新手更快上手学懂arm7.-Arm with keil prepared source code, novices can easily learn to fly faster arm7.

提取单个汉字字模程序，方便编写嵌入字库的液晶程序 修改函数writehz（）可以按自己的文件格式生成字库代码文件 作　者: David Wang Email: wy94081@sina.com.cn-extract a single Chinese character mode in order to facilitate the preparation of embedded font LCD revising the procedures writehz function () can have its own font file format generated code author : David Wang Email : wy94081@sina.com.cn

本文介绍了如何用AD识别用户输入的键盘的方法，较之点阵识别有其不可替代的优势；因为如果用4*4的话须消耗8个I/O口，而如果系统有AD功能的话就可能轻松解决了。 单片机8051F330发给ARM然后发给电脑。 其原理就是利用电阻的分压，按键时产生不同的电压，再用中断快速读取电压；然后对其进行编码，通过串口软件EASYARM在个人电脑里显示；经实验观察，效果还可以。 -This article describes how to use AD to identify the user s keyboard input methods, compared with dot-matrix recognition has its irreplaceable advantages because if we use 4* 4, then to be consumed eight I/O port, and if the system function in AD, then on may be easily resolved. Singlechip 8051F330 distributed computer and then distributed to ARM. Its principle is to use the sub-ballast resistor, when keys have different voltage, and then quickly read voltage interruption then encode, through the serial port software EASYARM in the personal computer display by experimental observation, the effect can also be.

直流电机PWM输出驱动，PCA输入脉冲捕获测量转速，数码管显示当前的转速，也可以通过电位器调节电机的转速，也可以使用PID控制算法，让电机的转速稳定在一个目标。

基于ARM(2410)GPIO的嵌入式小键盘驱动程序,提供了6个按键的支持.-Based on ARM (2410) GPIO embedded small keyboard driver, provides support for six keys.