零基础使用Android studio写一个安卓APP
摘要:最近有很多小伙伴在后台留言:Android Studio。我想大家是想写一个手机app,前面已经分享了在QT上如何写一个安卓蓝牙app,虽然qt可以做app,但是比起Android Studio还是差很多。这里介绍一种快速入门的方法来...
摘要:最近有很多小伙伴在后台留言:Android Studio。我想大家是想写一个手机app,前面已经分享了在QT上如何写一个安卓蓝牙app,虽然qt可以做app,但是比起Android Studio还是差很多。这里介绍一种快速入门的方法来...
第一章 电源简介 1.1 电源分类 1.1.1 电源与电源转换器 我们常提到的“电源”概念,指的是把其他形式的能量,如机械能、化学能、风能、热能、太阳能等直接转换成电能的装置,例如水力、风力、火力发电,以及各类电池等。 电源转换器是能够将电...
STM32F4 的每个 IO 都可以作为外部中断的中断输入口,这点也是 STM32F4 的强大之处。STM32F429 的中断控制器支持 22个外部中断/事件请求。每个中断设有状态位,每个中断/事件都有独立的触发和屏蔽设置。 STM32F4...
学习系统时钟之前先问大家一个问题?这是一个跑马灯的程序,为什么我们没有在主函数中配置系统时钟,却可以正常的执行流水灯代码呢? 我想大多数人都会说,已经配置了系统时钟,不需要在主函数中调用了。如果你回答不上来或者不清楚系统时钟是怎样配置的就好...
摘要:STM32 的启动过程,启动过程是指从 CPU 上电复位执行第 1 条指令开始(汇编文件)到进入 C 程序 main()函数入口之间的部分。启动过程相对来说还是比较重要的,虽然难但必须了解掌握。 1.不同的系列芯片的的启动代码不同。2...
我们既然要学习FreeRTOS,如果不是用STM32CubeMX来配置工程的话们就要去官网下载源码:https://www.freertos.org/ FreeRTOS源码下载 下面这些文件就是需要移植到你的工程中去的。 include文件...
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