用TIM3 接 霍尔传感器遇到问题，STM32-TIM3-HALL PROBLEM!
用TIM3 接 霍尔传感器；3根霍尔信号异或，霍尔信号跳变，将触发TIM_IT_Trigger 中断；但是实际过程中，不管我怎么转动无刷电机，霍尔信号一直在变化，但是 void TIM3_IRQHandler(void) 中断里，就是没有TIF 中断标记 即 if(TIM3->SR&0x0040)无法调用； （TIM3中断其他类型的中断是有的，譬如TIM3->SR&0x0010）怎么办啊？，void TIM3_Configuration(void)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
TIM_OCInitTypeDefTIM_OCInitStructure;
TIM_DeInit(TIM3);
TIM_TimeBaseStructure.TIM_Prescaler = 71;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period =65535;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_TRC ;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 10;
TIM_ICInit(TIM3, &TIM_ICInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse =1023;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM3,&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;
TIM_OCInitStructure.TIM_Pulse =65535;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC4Init(TIM3,&TIM_OCInitStructure);
TIM_SelectHallSensor(TIM3,ENABLE);
TIM_SelectInputTrigger(TIM3, TIM_TS_TI1F_ED);
TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Reset);
TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable);
TIM_SelectOutputTrigger(TIM3, TIM_TRGOSource_OC2Ref );
TIM_ITConfig(TIM3, TIM_IT_Trigger|TIM_IT_CC4, ENABLE);
//TIM_Cmd(TIM3,ENABLE);
}
你可以这样，先确定问题一定出现在程序还是在硬件，你先用函数发生器给出一定占空比的脉冲，测试你的程序时不时正确的，如果程序正确，再回个帖，霍尔元件用的时候是要上拉的，不清楚你的电路图，所以。。。。。。。。。。
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