宏定义寄存器地址

总线基地址

AHB总线的基地址从0x4002 0000开始，原来的基地址0x4001 8000不方便计算偏移地址

外设基地址

寄存器地址列表


在stm32f10x.h中宏定义寄存器地址

// 用来存放STM32寄存器映射的代码
// 外设  perirhral
#define  PERIPH_BASE               ((unsigned int)0x40000000)
#define  APB1PERIPH_BASE           PERIPH_BASE
#define  APB2PERIPH_BASE          (PERIPH_BASE + 0x10000)
#define  AHBPERIPH_BASE           (PERIPH_BASE + 0x20000)
#define  RCC_BASE                (AHBPERIPH_BASE + 0x1000)
#define  GPIOB_BASE              (APB2PERIPH_BASE + 0x0C00)
#define  RCC_APB2ENR            *(unsigned int*)(RCC_BASE + 0x18)
#define  GPIOB_CRL              *(unsigned int*)(GPIOB_BASE + 0x00)
#define  GPIOB_CRH              *(unsigned int*)(GPIOB_BASE + 0x04)
#define  GPIOB_ODR              *(unsigned int*)(GPIOB_BASE + 0x0C)

编写程序

//main.c
#include"stm32f10x.h"
int main(void)
{
#if 0
    //打开GPIOB端口时钟
    *(unsigned int *)0x40021018 |= (1<<3);
    //配置IO口为输出
    *(unsigned int *)0x40010C00 |= ((1)<<(4*0));
    *(unsigned int *)0x40010C00 |= ((1)<<(4*1));
    *(unsigned int *)0x40010C00 |= ((1)<<(4*5));
    //配置ODR寄存器
    *(unsigned int *)0x40010C0C &= ~(1<<0);
    *(unsigned int *)0x40010C0C &= ~(1<<1);
    *(unsigned int *)0x40010C0C &= ~(1<<5);
#else
    RCC_APB2ENR |= (1<<3);
    GPIOB_CRL &= ~((0x0f)<<0);//端口配置寄存器清零
    GPIOB_CRL |= (1<<(4*0));
    GPIOB_ODR &= ~(1<<0);
#endif
}
void SystemInit(void)
{
//函数体为空，目的为骗过编译器不报错
}

小知识

红色下线波浪线的解决方法

在代码编写区空白处 鼠标右键 outlinling->hida all outlinling