TIM9编码器模式求大神帮帮忙

一直跳的左眼 · 发表于 2019-7-8 17:31:18

void TIM9_Mode_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM9, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);

GPIO_PinAFConfig(GPIOE,GPIO_PinSource5,GPIO_AF_TIM9);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource6,GPIO_AF_TIM9);

/*编码器输入引脚PE->5 PE->6 -*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP ;
GPIO_Init(GPIOE, &GPIO_InitStructure);

/*- TIM9编码器模式 -*/
TIM_DeInit(TIM9);
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM9, &TIM_TimeBaseStructure);

TIM_EncoderInterfaceConfig(TIM9, TIM_EncoderMode_TI12, TIM_ICPolarity_BothEdge ,TIM_ICPolarity_BothEdge); //配置编码器触发模式和极性

TIM_ICStructInit(&TIM_ICInitStructure); //设置滤波器
TIM_ICInitStructure.TIM_ICFilter = 0xf;
TIM_ICInit(TIM9, &TIM_ICInitStructure);

TIM_ITConfig(TIM9,TIM_IT_Update,ENABLE);
TIM_ClearFlag(TIM9, TIM_FLAG_Update);

TIM_SetCounter(TIM9, 32768);

TIM_Cmd(TIM9, ENABLE); //使能TIM9
}
int main(void)
{
      LED_Init();
   delay_init(168);
   uart_init(115200);
      TIM9_Mode_Config();
while(1)
{

Enc0Pos = TIM_GetCounter(TIM9);

            Enc0Pos /= 2;

LED0 =!LED0;
delay_ms (500);
printf("Position = %d\n\r", Enc0Pos);
}

}
打印的数据始终为零，这是怎么回事啊？求帮忙