stm32單定時器多通道輸入捕獲是不是在初始化時 將通道配置哪里寫兩個 其他地方寫兩個
void TIM2_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_6);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_ResetBits(GPIOB,GPIO_Pin_1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_5);
TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM3_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM3_ICInitStructure.TIM_ICFilter = 0x00;
TIM_ICInit(TIM3, &TIM3_ICInitStructure);
TIM3_ICInitStructure.TIM_Channel = TIM_Channel_4;
TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM3_ICInitStructure.TIM_ICFilter = 0x00;
TIM_ICInit(TIM3, &TIM3_ICInitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC1,ENABLE);
TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC4,ENABLE);
TIM_Cmd(TIM3,ENABLE );
}
然后中斷函數里邊 都寫上就行
u8 TIM3CH1_CAPTURE_STA=0;
u16 TIM3CH1_CAPTURE_VAL;
u8 TIM3CH4_CAPTURE_STA=0;
u16 TIM3CH4_CAPTURE_VAL;
//?¨ê±?÷5?D??·t??3ìDò
void TIM3_IRQHandler(void)
{
if((TIM3CH1_CAPTURE_STA&0X80)==0)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
if(TIM3CH1_CAPTURE_STA&0X40)
{
if((TIM3CH1_CAPTURE_STA&0X3F)==0X3F)
{
TIM3CH1_CAPTURE_STA|=0X80;
TIM3CH1_CAPTURE_VAL=0XFFFF;
}else TIM3CH1_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)
{
if(TIM3CH1_CAPTURE_STA&0X40)
{
TIM3CH1_CAPTURE_STA|=0X80;
TIM3CH1_CAPTURE_VAL=TIM_GetCapture1(TIM3);
TIM_OC1PolarityConfig(TIM3,TIM_ICPolarity_Rising);
}else
{
TIM3CH1_CAPTURE_STA=0;
TIM3CH1_CAPTURE_VAL=0;
TIM_SetCounter(TIM3,0);
TIM3CH1_CAPTURE_STA|=0X40;
TIM_OC1PolarityConfig(TIM3,TIM_ICPolarity_Falling);
}
}
}
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1|TIM_IT_Update);
if((TIM3CH4_CAPTURE_STA&0X80)==0)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
if(TIM3CH4_CAPTURE_STA&0X40)
{
if((TIM3CH4_CAPTURE_STA&0X3F)==0X3F)
{
TIM3CH4_CAPTURE_STA|=0X80;
TIM3CH4_CAPTURE_VAL=0XFFFF;
}else TIM3CH4_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM3, TIM_IT_CC4) != RESET)
{
if(TIM3CH4_CAPTURE_STA&0X40)
{
TIM3CH4_CAPTURE_STA|=0X80;
TIM3CH4_CAPTURE_VAL=TIM_GetCapture1(TIM3);
TIM_OC4PolarityConfig(TIM3,TIM_ICPolarity_Rising);
}else
{
TIM3CH4_CAPTURE_STA=0;
TIM3CH4_CAPTURE_VAL=0;
TIM_SetCounter(TIM3,0);
TIM3CH4_CAPTURE_STA|=0X40;
TIM_OC4PolarityConfig(TIM3,TIM_ICPolarity_Falling);
}
}
}
TIM_ClearITPendingBit(TIM3, TIM_IT_CC4|TIM_IT_Update);
}
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