编码器模式就读取正反转当按键用怎么读取正反转会方便点？

zc_dl · 发表于 2016-4-30 13:41:11

void TIM3_Mode_Config(void)
{
//u16 CCR1_Val = 2500;
//u16 CCR2_Val = 1000;
GPIO_InitTypeDef GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
//TIM_OCInitTypeDef  TIM_OCInitStructure;

/*----------------------------------------------------------------*/

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_StructInit(&GPIO_InitStructure);
  /* Configure PA.06,07 as encoder input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

/*----------------------------------------------------------------*/

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能ＴＩＭ３
TIM_DeInit(TIM3);
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  TIM_TimeBaseStructure.TIM_Period =0xffff;    //
  TIM_TimeBaseStructure.TIM_Prescaler =0;       //设置预分频：
  TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ; //设置时钟分频系数：不分频
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数模式
  //TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;
/*初始化TIM2定时器 */
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

/*-----------------------------------------------------------------*/
//编码配置                      编码模式
TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI12,
                           TIM_ICPolarity_Rising, TIM_ICPolarity_Rising );  //TIM_ICPolarity_Rising上升沿捕获
  TIM_ICStructInit(&TIM_ICInitStructure);
  TIM_ICInitStructure.TIM_ICFilter = 6;       //比较滤波器
  TIM_ICInit(TIM3, &TIM_ICInitStructure);

//TIM_ARRPreloadConfig(TIM3, ENABLE);
// Clear all pending interrupts
  TIM_ClearFlag(TIM3, TIM_FLAG_Update);
  TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE); //使能中断
  //Reset counter
  TIM3->CNT =2000;

TIM_Cmd(TIM3, ENABLE); //使能定时器3
}
void TIM_Init(void)
{
  TIM3_Mode_Config();
}

TIM_GetCounter(TIM3)可以正确读取TIM3的计数值，若想单纯把左转右转当成两个按键用有没有寄存器直接读取正反转方向？或者有啥好点的方法？？