Stm32通用计时器 使用ec11编码器

参考

http://www.51hei.com/bbs/forum.php?mod=viewthread&tid=145101

以下是TIM4 使用ec11 ,很灵敏很正常

void Encoder_Init_TIM4(void)
{
    
    
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;  
  TIM_ICInitTypeDef TIM_ICInitStructure;  
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);//使能定时器4的时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);//使能PB端口时钟
	
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;	//端口配置
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入
  GPIO_Init(GPIOB, &GPIO_InitStructure);					      //根据设定参数初始化GPIOB
  
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Prescaler = 0x0; // 预分频器 
  TIM_TimeBaseStructure.TIM_Period = ENCODER_TIM_PERIOD; //设定计数器自动重装值
  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(TIM4, &TIM_TimeBaseStructure);
  TIM_EncoderInterfaceConfig(TIM4, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);//使用编码器模式3
  TIM_ICStructInit(&TIM_ICInitStructure);
  TIM_ICInitStructure.TIM_ICFilter = 10;
  TIM_ICInit(TIM4, &TIM_ICInitStructure);
  TIM_ClearFlag(TIM4, TIM_FLAG_Update);//清除TIM的更新标志位
  TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
  //Reset counter
  TIM_SetCounter(TIM4,0);
  TIM_Cmd(TIM4, ENABLE); 
}

但是简单的复制粘贴并不能操作多个编码器
经调查发现TIM2,3,4,5 才是通用计时器

参考

https://blog.csdn.net/qq_38410730/article/details/79828852

发现TIM4之所以可用是因为pin脚的定义,
找到TIM3对应PA6 PA7 ,实验成功, 可操作多个编码器

参考数据手册

https://www.st.com/resource/en/datasheet/stm32f103ze.pdf
31页 Table 5. High-density STM32F103xC/D/E pin definitions