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STM32f103RE有LSI校准的功能吗,为什么我按手册配置好了定时器,可是老是不进定时器中断,是我的配置问题吗??,求高手指教
void tiM5_ConfigForLSI(void) { NVIC_InitTypeDef NVIC_InitStructure; TIM_ICInitTypeDef TIM_ICInitStructure; /* Enable TIM5 clocks */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); /* Deinitialize the TIM5 peripheral registers to their default reset values */ TIM_DeInit(TIM5); /* Configure TIM5 prescaler */ TIM_PrescalerConfig(TIM5, 0, TIM_PSCReloadMode_Immediate); /* Connect internally the TM5_CH4 Input Capture to the LSI clock output */ GPIO_PinRemapConfig(GPIO_Remap_TIM5CH4_LSI, ENABLE); /* TIM5 configuration: Input Capture mode --------------------- The LSI oscillator is connected to TIM5 CH4 The Rising edge is used as active edge, The TIM5 CCR4 is used to compute the frequency value ------------------------------------------------------------ */ TIM_ICInitStructure.TIM_Channel = TIM_Channel_4; TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV8; TIM_ICInitStructure.TIM_ICFilter = 0; TIM_ICInit(TIM5, &TIM_ICInitStructure); /* Enable the TIM5 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* TIM10 Counter Enable */ TIM_Cmd(TIM5, ENABLE); /* Reset the flags */ TIM5->SR = 0; /* Enable the CC4 Interrupt Request */ TIM_ITConfig(TIM5, TIM_IT_CC4, ENABLE); } |
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2个回答
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{:4:}{:4:}{:4:}{:4:}{:4:}
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已解决,AFIO时钟未开启
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