问答

用了贵司MM32 Motor-DK板，芯片是MM32SPIN360C。用HSI作为时钟输入，PLL作为系统时钟，PLL时钟配置为96MHz。配置PA9口为推挽输出模式，AFRH中的AFR9区域配置为AF5，即MCO输出。RCC->CFGR寄存器的MCO区域配置为7，即MCO输出为PLL频率的一半。但是PA9口测不到输出波形。

MM32SPIN系统单片机高级定时器输入捕获 没办法进入TIM_CC_IRQH中断void Remote_1(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);//使能GPIOB时钟 GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_7);//GPIOB4复用为TIM1 //GPIO GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;//下拉输入 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); } void Remote_Init(uint16_t period, uint8_t prescaler) { TIM_TimeBaseInitTypeDef TIM_StructInit; TIM_ICInitTypeDef TIM_ICInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); TIM_TimeBaseStructInit(&TIM_StructInit); TIM_StructInit.TIM_Period = period; TIM_StructInit.TIM_Prescaler = prescaler; TIM_StructInit.TIM_ClockDivision = TIM_CKD_DIV1; TIM_StructInit.TIM_CounterMode = TIM_CounterMode_Up; TIM_StructInit.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM1, &TIM_StructInit); //TIM1输入捕获参数设置 TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;//CC2S=01 选择输入端 IC2映射到TI1上 TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;//上升沿捕获 TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;//映射到TI1上 TIM_ICInitStructure.TIM_ICFilter = 0x0; TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;//配置输入分频,不分频 TIM_ICInit(TIM1, &TIM_ICInitStructure); TIM_ARRPreloadConfig(TIM1, ENABLE); TIM_ITConfig(TIM1,TIM_IT_CC2 | TIM_IT_Update, ENABLE); TIM_CtrlPWMOutputs(TIM1, ENABLE); TIM_Cmd(TIM1, ENABLE); } void Remote_2(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_UP_TRG_COM_IRQn;//定时中断3 NVIC_InitStructure.NVIC_IRQChannelPriority = 1;//中断优先级 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能中断 NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;//定时中断3 NVIC_InitStructure.NVIC_IRQChannelPriority = 0;//中断优先级 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能中断 NVIC_Init(&NVIC_InitStructure); } void TIM1_BRK_UP_TRG_COM_IRQHandler(void) { if(TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET)//溢出中断 { LED3_TOGGLE(); TIM_ClearITPendingBit(TIM1, TIM_IT_Update); //清除TIMx更新中断标志 } } void TIM1_CC_IRQHandler(void) { if(TIM_GetITStatus(TIM1, TIM_IT_CC2) != RESET)//捕获中断 { LED2_TOGGLE(); TIM_ClearITPendingBit(TIM1, TIM_IT_CC2); //清除TIMx更新中断标志 } }