阿尔法点亮LED灯(三) STM32模式

风间琉璃• 发布时间：2021-11-27 22:31:33 ，浏览量：0

文章目录

前言
一、原理分析
二、MX6U寄存器定义
- 1.外设结构体
- 2.结构体基地址
- 3.结构体访问指针
三、编译下载
总结

提示：以下是本篇文章正文内容

一、原理分析

前面用C语言编写 LED 灯驱动的时候，每个寄存器的地址都需要写宏定义，这样做实在是太麻烦了，在STM32中，比如访问GPIOB 的寄存器 ODR ：GPIOB->ODR

我们也可以参照32的形式将某个外设的所有寄存器写入到一个结构体里面，定义一个结构体指针指向外设的寄存器基地址，这样就可以通过这个结构体指针来访问这个外设的所有寄存器，因为在结构体中成员地址递增，并且属于同一个外设的寄存器地址基本上是相邻的（有些是保留寄存器）

在32中使用寄存器操作GPIO

GPIOE->CRL&=0XFF0FFFFF;
GPIOE->CRL|=0X00300000; //PE5 推挽输出
GPIOE->ODR|=1


    
        
        
        
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