1 static void RCC_Init(void)

 2 {

 3   RCC->APB1ENR|=1<<17;  //使能串口2时钟

 4   RCC->APB1ENR|=1<<14;//SPI2时钟使能

 5   RCC->APB2ENR|=1<<12;//使能SPI1时钟

 6   RCC->APB2ENR|=1<<8;    //使能ADC1

 7   RCC->APB2ENR|=1<<9;    //使能ADC2

 8   RCC->APB2ENR|=1<<10;    //使能ADC3

 9   RCC->APB2ENR|=1<<14;    //使能SYSCFG时钟

10

11   RCC->AHB1ENR|=1;    //使能PORTA时钟

12   RCC->AHB1ENR|=1<<1;    //使能PORTB时钟

13   RCC->AHB1ENR|=1<<2;    //使能PORTC时钟

14   RCC->AHB1ENR|=1<<3;    //使能PORTD时钟

15   RCC->AHB1ENR|=1<<4;     //使能PORTE时钟

16   RCC->AHB1ENR|=1<<5;     //使能PORTE时钟

17   RCC->AHB1ENR|=1<<6;    //使能PORTG时钟

18

19   RCC->APB1ENR|=1<<20;      //使能串口5时钟

20   RCC->APB1ENR|=1<<19;      //使能串口4时钟

21   RCC->APB1ENR|=1<<18;      //使能串口3时钟

22   RCC->APB1ENR|=1<<17;      //使能串口2时钟

23

24   //DMA

25   RCC->AHB1ENR|=1<<21;//DMA1时钟使能

26   RCC->AHB1ENR|=1<<22;//DMA2时钟使能

27

28   RCC->APB1ENR|=1<<1;         //TIM3时钟使能

29   RCC->APB1ENR|=1<<2;         //TIM4时钟使能

30   RCC->APB2ENR|=1<<0;        //TIM1时钟使能

31   RCC->APB2ENR|=1<<1;        //TIM8时钟使能

32 }