AT91系列ARM芯片的开发技术

用stm32驱动att7022e采集三相交流电的电量参数并计算出对应的值(control )

旋转编码器的STM32F103的驱动程序，建议读取旋转编码器的时间间隔为1-10mS一次，经测试，该程序完全可用。(STM32F103 rotary encoder driver, it is recommended to read rotary encoder interval is 1-10mS time, tested the program fully available.)

ARMA模型时间序列分析法简称为时序分析法，是一种利用参数模型对有序随机振动响应数据进行处理，从而进行模态参数识别的方法。参数模型包括AR自回归模型、MA滑动平均模型和ARMA自回归滑动平均模型。这里给出了一个求出ARMA模型参数的MATLAB程序。(ARMA model for time series analysis method referred to as time series analysis is a parametric model for the orderly use of random vibration data in response to treatment, thereby to carry out modal parameter identification method. Parameter model including the autoregressive AR model, MA model and ARMA moving average Autoregressive Moving Average Model. Here gives an ARMA model parameters are obtained MATLAB procedures.)

/超声波测距系统,2008.5.5// 89s51,数显，99CM-5CM,声光报警,继电器欠压保护,继电器5CM继电器控制电机断电 工作电压12v输入,3路数码管显示距离 (/ Ultrasonic ranging system, 2008.5.5// 89s51, digital display, 99CM-5CM, sound and light alarm, undervoltage protection relay, relay 5CM relay control voltage 12v motor power input, 3-way digital display distance)

基于stm32的TVL5618的驱动程序，亲测可用(Based stm32 of TVL5618 driver, pro-test available)

am335x Startware adc例子，针对am335x系列芯片(am335x Startware adc example, for am335x series chip)

基于STM32和W5500 的阿里云平台MQTT连接，内置了HMAC-SHA1算法，可以直接填写阿里云物联网平台的三个参数，程序直接生成域名、账户名、密码以及Topic。软件还包含基于Cjson的json构建与解析。(Based on STM32 and W5500, the MQTT connection of Aliyun platform is built-in with HMAC-SHA1 algorithm, which can fill in three parameters of Aliyun Internet of Things platform directly. The program generates domain name, account name, password and Topic directly. The software also includes JSON construction and parsing based on Cjson.)

说明：  件设计思路是利用 MS 的定时器 B 中断执行相应的中断服务程序来产生舵机用多 路 PWM 波.4的 系 统 主 时 钟 频 率 取 8 MHz，设每个定时周期取 250/ =31.25 μs，(The x medium-density performance line family incorporates the highperforfrequency, highspeed embedded memories (Flash memory up toytes), and an extensive range of s and peripherals connected to two APB buses.)

最近完成的LINUX下RTC8025的驱动，平台：AT91RM9200，主要实现时钟操作的几个接口，对开发同类产品的驱动很有借鉴作用。(recently completed RTC8025 LINUX driven platforms : AT91RM9200. main clock operation of several interfaces, the development of similar products in a very useful reference drive.)

硬件平台：STM32F401板子 软件平台：Keil5 功能：实现不同占空比的PWM波输出，通过按键切换输出模式（25%，50%，75%三种占空比模式）同时外接数码管显示当前模式（1，2，3）(Hardware platform: STM32F401 board Software platform: Keil5 Function: realize PWM wave output with different duty ratio, switch output mode by key button (25%, 50%, 75% three duty ratio mode) and display current mode (1, 2, 3).)