1.?RCC時(shí)鐘，GPIO/TIM

2.?配置GPIO，輸入模式

3.?配置時(shí)基單元

4.?配置輸入捕獲單元

5.?配置編碼器模式

6.?TI_Cmd

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1.RCC時(shí)鐘，GPIO/TIM

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

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2.配置GPIO，輸入模式

GPIO_InitTypeDef GPIO_InitStruct;

????GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;

????GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;

????GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStruct);

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3.配置時(shí)基單元

????TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;

????TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;

????TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;

????TIM_TimeBaseInitStruct.TIM_Period = 65536 - 1;//ARR

????TIM_TimeBaseInitStruct.TIM_Prescaler = 1 - 1; //PSC

????TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;

????TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStruct);

4.配置輸入捕獲單元

????TIM_ICInitTypeDef TIM_ICInitStruct;

????TIM_ICStructInit(&TIM_ICInitStruct);

????TIM_ICInitStruct.TIM_Channel = TIM_Channel_1;

????TIM_ICInitStruct.TIM_ICFilter = 0XF;

????TIM_ICInitStruct.TIM_ICPolarity = TIM_ICPolarity_Rising;

????TIM_ICInit(TIM3, &TIM_ICInitStruct);

????

????TIM_ICInitStruct.TIM_Channel = TIM_Channel_2;

????TIM_ICInitStruct.TIM_ICFilter = 0XF;

TIM_ICInit(TIM3, &TIM_ICInitStruct);

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5.配置編碼器模式

TIM_EncoderInterfaceConfig(TIM3,TIM_EncoderMode_TI12,TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);

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6.TI_Cmd

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int16_t Encoder_Get(void)

{

???int16_t temp;

????

???temp = ?TIM_GetCounter(TIM3);

???TIM_SetCounter(TIM3, 0);

????

???return temp;

}

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void TIM2_IRQHandler(void)

{

????

????if(TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)

????{?

????????Speed = Encoder_Get();

????????TIM_ClearITPendingBit(TIM2, TIM_IT_Update);

????}

}

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While(1)中顯示Speed