STM32f103-定时器配置为编码器模式使用

直接上代码：

volatile u32 encoder_count;

void Encoder_Init_TIM2(void)
{
	/*GPIO配置，用的是TIM2-CH1和TIM2-CH2通道，分别对应PA0和PA1*/ 
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;  
	TIM_ICInitTypeDef TIM_ICInitStructure;  
	GPIO_InitTypeDef GPIO_InitStructure;

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//使能PA

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;	//PA0  PA1
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //FLOATING
	GPIO_Init(GPIOA, &GPIO_InitStructure);		         //初始化

 	/*TIM2 定时器配置*/ 
	TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
	TIM_TimeBaseStructure.TIM_Prescaler = 0x0; // 分频不分频
	TIM_TimeBaseStructure.TIM_Period = 0xff;  //重载初值
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //选择时钟分频：不分频
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数  
	TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
 
	 /*编码器配置*/ 
	TIM_EncoderInterfaceConfig(TIM2, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
	TIM_ICStructInit(&TIM_ICInitStructure);
	TIM_ICInitStructure.TIM_ICFilter = 10;
	TIM_ICInit(TIM2, &TIM_ICInitStructure);
	TIM_ClearFlag(TIM2, TIM_FLAG_Update); //清除TIM的更新标志位
	TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
	//Reset counter
	TIM_SetCounter(TIM2,0);
	TIM_Cmd(TIM2, ENABLE); 
}

//读计数值
int Read_Encoder(u8 TIMX)
{
	int Encoder_TIM;    
	switch(TIMX)
	{
		case 2:  Encoder_TIM= (short)TIM2 -> CNT;  TIM2 -> CNT=0;break;
		case 3:  Encoder_TIM= (short)TIM3 -> CNT;  TIM3 -> CNT=0;break;	
		case 4:  Encoder_TIM= (short)TIM4 -> CNT;  TIM4 -> CNT=0;break;	
		default:  Encoder_TIM=0;
	}
	return Encoder_TIM;
}

//中断
void TIM2_IRQHandler(void)
{                                   
 if(TIM2->SR&0X0001)//????
 {           

 }                  
 TIM2->SR&=~(1<<0);//清中断标志
}

如何使用：

int main(void)
{

	SystemInit();					//配置系统时钟为72M
	uart_init(9600);    			//串口初始化
	Encoder_Init_TIM2();  		//编码器初始化

	while (1)
	{	
		if(Read_Encoder(2)>=10)   //比如每记10个打印一个数据
		{
			UART1SendByte(0x0a);
		}
	}
}