stm32f103ze用一段c语言代码实现按键控制流水灯状态

按键一控制正向流水灯（按一下动一下）按键二控制反向流水灯（按一下动一下）按键三控制流水灯的数量（1-3个）

这篇博客: STM32F103C8T6实现流水灯中的 三、C语言实现流水灯 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:

创建项目
选择STM32F103C8开发板
- 创建项目出现弹窗，不勾选setup项，只勾选core项
在output里选择create hex file
source group里创建led.c，并写入代码，注意项目结构，使用的引脚是PA7，PB9，PC15

//--------------APB2???????------------------------
#define RCC_AP2ENR	*((unsigned volatile int*)0x40021018)
	//----------------GPIOA????? ------------------------
#define GPIOA_CRL	*((unsigned volatile int*)0x40010800)
#define	GPIOA_ORD	*((unsigned volatile int*)0x4001080C)
//----------------GPIOB????? ------------------------
#define GPIOB_CRH	*((unsigned volatile int*)0x40010C04)
#define	GPIOB_ORD	*((unsigned volatile int*)0x40010C0C)
//----------------GPIOC????? ------------------------
#define GPIOC_CRH	*((unsigned volatile int*)0x40011004)
#define	GPIOC_ORD	*((unsigned volatile int*)0x4001100C)
//-------------------???????-----------------------
void  Delay_wxc( volatile  unsigned  int  t)
{
     unsigned  int  i;
     while(t--)
         for (i=0;i<800;i++);
}
//------------------------???--------------------------
int main()
{
	int j=100;
	RCC_AP2ENR|=1<<2;			//APB2-GPIOA??????
	RCC_AP2ENR|=1<<3;			//APB2-GPIOB??????	
	RCC_AP2ENR|=1<<4;			//APB2-GPIOC??????
	//????????? RCC_APB2ENR|=1<<3|1<<4;
	GPIOA_CRL&=0x0FFFFFFF;		//??? ??	
	GPIOA_CRL|=0x20000000;		//PA7????
	GPIOA_ORD|=1<<7;			//???????
	
	GPIOB_CRH&=0xFFFFFF0F;		//??? ??	
	GPIOB_CRH|=0x00000020;		//PB9????
	GPIOB_ORD|=1<<9;			//???????
	
	GPIOC_CRH&=0x0FFFFFFF;		//??? ??
	GPIOC_CRH|=0x30000000;   	//PC15????
	GPIOC_ORD|=0x1<<15;			//???????	
	while(j)
	{	
		GPIOA_ORD=0x0<<0;		//PB0???	
		Delay_wxc(1000000);
		GPIOA_ORD=0x1<<0;		//PB0???
		Delay_wxc(1000000);
		
		GPIOB_ORD=0x0<<9;		//PB9???	
		Delay_wxc(1000000);
		GPIOB_ORD=0x1<<9;		//PB9???
		Delay_wxc(1000000);
		
		GPIOC_ORD=0x0<<15;		//PC15???	
		Delay_wxc(1000000);
		GPIOC_ORD=0x1<<15;		//PC15???
		Delay_wxc(1000000);
	}
}