STM32F103 TIM2编码器问题

莫晓东 · 发表于 2018-9-24 16:58:09

TIM2编码器用的通道1和通道2(PA0\PA1) 没有重映射
但是在计数是只是0、1跳变，同样的配置在定时器4上可用
代码如下：void encoder_r_init(void)
{

GPIO_InitTypeDef GPIO_InitTypestructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitTypeStructure;

TIM_ICInitTypeDef TIM_ICInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);  //3õê¼»ˉ×óóò±àÂëÆ÷μÄIO
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //3õê¼»ˉ×óóò±àÂëÆ÷¶¨ê±Æ÷

GPIO_InitTypestructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1;
GPIO_InitTypestructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;                //éèÖÃ×ó±àÂëÆ÷μÄIO
GPIO_InitTypestructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitTypestructure);

  TIM_TimeBaseInitTypeStructure.TIM_ClockDivision=TIM_CKD_DIV1;       //2»·ÖÆμ
TIM_TimeBaseInitTypeStructure.TIM_CounterMode=TIM_CounterMode_Up;    //ÏòéÏ¼Æêy
TIM_TimeBaseInitTypeStructure.TIM_Period=65535;                      //ÖØ×°ÔØÖμ
TIM_TimeBaseInitTypeStructure.TIM_Prescaler=0;                      //Ô¤·ÖÆμÆ÷
// TIM_TimeBaseInitTypeStructure.TIM_RepetitionCounter=
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitTypeStructure);
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);//Çå3yTIMμÄ¸üDÂ±êÖ¾Î»
  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
  //Reset counter
  TIM_SetCounter(TIM2,0);
TIM2 -> CNT=0;
  TIM_Cmd(TIM2, ENABLE);

}