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说明：  Robomaster ICRA AI机器人底层STM32代码，基于Freertos，适用于Robomaster A型开发板STM32F427IIHx(Robomaster ICRA AIRobot STM32code Freertos-Robomaster A Development Board STM32F427IIHX)

可应用按键实时改变pwm输出占空比，同时有端口进行相应的pwm捕获。相应的端口配置在程序注释处。(It can change the duty cycle of PWM output in real time by using keys, and at the same time, it has ports to capture the corresponding pwm.)

htu21芯片驱动！项目实际使用中，10K台无故障！(Htu21 chip driver! In the actual use of the project, the 10K station is free of failures!)

2*1 alamouti code ,which provides increased diversity and full data rates

简易示波器程序,可以调频率，可以调幅值，并可以随意调整输入源(Simple oscilloscope procedures, you can tune the frequency, amplitude values can be)

介绍如何简单可靠而方便测量 4～20mA 信号的文章。许多仪器仪表在远距离传送信号时，都有可能采取 4～20mA 的方式进行传送。本文对使用运算放大器或者不用运算放大器的场合都有介绍。给出了接口电阻的计算方法以及调整4mA＝零点，20mA＝满度的详细说明。并附有局部连接的原理图。(How simple, reliable and convenient measurement of 4 ~ 20mA signal article. Many instruments in the long-distance signal transmission, may take 4 ~ 20mA way transmission. In this paper, an operational amplifier or op amp do not have a description occasions. Shows the calculation of the interface resistance and adjust the 4mA = zero, 20mA = full scale details. Local connections together with the schematic.)

基于stm32开发的频率检测及液晶显示，在显示时的测量范围为50hz到100khz。误差为<=1%。(Frequency detection and liquid crystal display based on stm32)

MAX1247子程序,实现12位高精度串行AD转换(MAX1247 subroutine, 12 realize high-precision serial AD converter)

不错的拓普微3.5寸LCD显示屏驱动代码，可以参考(Good TOPWAY 3.5-inch LCD display driver code, you can refer to it)

ARM Cortex-A8 裸板，定时器4 和定时器0的测试程序(ARM Cortex-A8 bare boards, Timer 4 and Timer 0 testing procedures)