中级会员
 
- 积分
- 380
- 金钱
- 380
- 注册时间
- 2016-8-2
- 在线时间
- 107 小时
|
1金钱
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 0xFFFFFFFF; //RESET_TIMEROUT;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM_CAP, &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_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0;
TIM_PWMIConfig(TIM_CAP, &TIM_ICInitStructure); //根据参数配置TIM外设信息
TIM_SelectInputTrigger(TIM_CAP, TIM_TS_TI2FP2); //TIM_TS_TI2FP2 //选择IC2为始终触发源
TIM_SelectSlaveMode(TIM_CAP, TIM_SlaveMode_Reset); //TIM从模式:触发信号的上升沿重新初始化计数器和触发寄存器的更新事件
TIM_SelectMasterSlaveMode(TIM_CAP, TIM_MasterSlaveMode_Enable); //启动定时器的被动触发
TIM_Cmd(TIM_CAP, ENABLE);
TIM_ITConfig(TIM_CAP, TIM_IT_CC2 | TIM_IT_Trigger, ENABLE);
/* TIM1的NVIC中断配置 */
NVIC_InitStruct.NVIC_IRQChannel = TIM1_CC_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
然后中断处理函数智能,为什么TIM_GetITStatus(TIM_CAP, TIM_IT_Update) != RESET 和TIM_GetITStatus(TIM_CAP, TIM_IT_CC2) != RESET都同时能进啊,这样就判断不了捕获不到信号超时了
|
最佳答案
查看完整内容[请看2#楼]
问题已解决,另外还需设置updata标志的触发源,以我为例,需要在计数器上溢时产生updata标志。
TIM_UpdateRequestConfig(TIM3, TIM_UpdateSource_Regular);
#define TIM_UpdateSource_Regular ((uint16_t)0x0001) /*!< Source of update is counter overflow/underflow. */
|