STM32控制PWM输出的脉冲数

willow

我的思路是用TIM5发出脉冲数，TIM2计时，计时结束中断时停止PWM输出。 这是我TIM2的设置 void TIM2_Configuration(void) {     TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;         TIM_ICInitTypeDef  TIM_ICInitStructure;         TIM_TimeBaseStructure.TIM_Period = 60000-1;         TIM_TimeBaseStructure.TIM_Prescaler = 36000-1;         TIM_TimeBaseStructure.TIM_ClockDivision = 0;         TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;         TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);                   TIM_ICInitStructure.TIM_Channel =TIM_Channel_2;         TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;         TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;                 TIM_ICInitStructure.TIM_ICFilter = 0;         TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;                 TIM_ICInit(TIM2 , &TIM_ICInitStructure);         TIM_SelectInputTrigger(TIM2,TIM_TS_TI2FP2);         TIM_SelectSlaveMode(TIM2,TIM_SlaveMode_Reset);         TIM_SelectMasterSlaveMode(TIM2,TIM_MasterSlaveMode_Enable);         TIM_Cmd(TIM2 , ENABLE);                 TIM_ITConfig(TIM2,TIM_IT_CC2,ENABLE) ; } void NVIC_Configuration(void) {                                                                         NVIC_InitTypeDef NVIC_InitStructure;                            #ifdef  VECT_TAB_RAM                     NVIC_SetVectorTable(NVIC_VectTab_RAM , 0x0);                    #else                            NVIC_SetVectorTable(NVIC_VectTab_FLASH , 0x0);    #endif         NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);         NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;         NVIC_Init(&NVIC_InitStructure); } void TIM2_IRQHandler(void) {    if (TIM_GetITStatus(TIM2, TIM_FLAG_CC2) != RESET)             {                   GPIO_ResetBits(GPIOA, GPIO_Pin_0);                   TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);             } } 各位原子哥们，帮忙看看我的配置是不是正确的, 用TIM5已经可以产生脉冲了，我想要产生一定的脉冲数之后，用TIM2中断来停止但是TIM2计数没反应啊，TIM5一直发脉冲来着。 求解决，TIM2哪里配置错了？

login_FAE

http://www.openedv.com/posts/list/41832.htm
网友的