stm32 直接读写寄存器代码风格总结

根据memory mapping 直接写寄存器代码风格：

#define GPIOA_BASE1 (uint32_t)0x40010800#define GPIOA_CRH ((uint32_t*)(GPIOA_BASE1+0x04))

*GPIOA_CRH=0x000004B0;//A端口//复用推挽输出

结构体指针解决连续多个寄存器读写设置：

#define Usart1_BASE	 0x40013800typedef struct{__IO uint32_t SR;__IO uint32_t DR;__IO uint32_t BRR;__IO uint32_t CR1;__IO uint32_t CR2;__IO uint32_t CR3;__IO uint32_t GTPR;}Usart1_typedef;#define Usart1 ((Usart1_typedef*)Usart1_BASE)