STM32U575RIT6单片机（一）

作业一：自己实现寄存器配置点亮LED1。

作业二：寄存器配置打开风扇，打开蜂鸣器。

//1、使能系统时钟 // 系统时钟初始化 - 不加入会报错 可以尝试一下 void SystemInit(void) { //对地址 0xE000ED88 的内容 进行修改: //将0X3向左移动20位 或上 0X3 向左移动22位 (unsigned int) 0xE000ED88|=((3UL « 20U)|(3UL « 22U)); } int main() { //小灯 //1、GPIOC的RCC寄存器地址，将位2置为1，使能GPIOC的RCC时钟 *(unsigned int *) 0x56020c8c |=1«2;

//2、PC13，配置为通用输出模式，GPIO_MODER位27和26置为01 (unsigned int) 0x52020800 &=~(1«27); (unsigned int) 0x52020800 |=1«26;

//3、PC13设置输出类型，GPIO_OTYPER寄存器推挽输出位13设置为0 (unsigned int) (0x52020800+0x04) &=~(1«13);

//4、PC13设置为低速输出即可,GPIO_OSPEEDR位27和26置为00 (unsigned int) (0x52020800+0x08) &=(1«27); (unsigned int) (0x52020800+0x08) &=(1«26);

//5、PC13设置为输出,GPIO_ODR寄存器高电平位13置1 (unsigned int) (0x52020800+0x14) |=(1«13);

//蜂鸣器 //1、GPIOC的RCC寄存器地址，将位0置为1，使能GPIOC的RCC时钟 *(unsigned int *) 0x56020c8c |=1«0;

//2、PA15，配置为通用输出模式，GPIO_MODER位27和26置为01 (unsigned int) 0x52020000 &=~(1«31); (unsigned int) 0x52020000 |=1«30;

//3、PA15设置输出类型，GPIO_OTYPER寄存器推挽输出位15设置为0 (unsigned int) (0x52020000+0x04) &=~(1«15);

//4、PA15设置为低速输出即可,GPIO_OSPEEDR位31和30置为00 (unsigned int) (0x52020000+0x08) &=(1«31); (unsigned int) (0x52020000+0x08) &=(1«30);

//5、PA15设置为输出,GPIO_ODR寄存器高电平位15置1 (unsigned int) (0x52020000+0x14) |=(1«15);

//风扇 //1、GPIOC的RCC寄存器地址，将位2置为1，使能GPIOC的RCC时钟 *(unsigned int *) 0x56020c8c |=1«2;

//2、PC6，配置为通用输出模式，GPIO_MODER位13和12置为01 (unsigned int) 0x52020800 &=~(1«13); (unsigned int) 0x52020800 |=1«12;

//3、PC6设置输出类型，GPIO_OTYPER寄存器推挽输出位6设置为0 (unsigned int) (0x52020800+0x04) &=~(1«6);

//4、PC6设置为低速输出即可,GPIO_OSPEEDR位13和12置为00 (unsigned int) (0x52020800+0x08) &=(1«13); (unsigned int) (0x52020800+0x08) &=(1«12);

//5、PC6设置为输出,GPIO_ODR寄存器高电平位6置1 (unsigned int) (0x52020800+0x14) |=(1«6);

return 0; } //2、使能GPIO总线上的时钟