我感觉是库函数的问题，因为库函数没有要求给他TIM3，参数只有数据 [mw_shl_code=c,true]void TIM_BDTRStructInit(TIM_BDTRInitTypeDef* TIM_BDTRInitStruct) { /* Set the default configuration */ TIM_BDTRInitStruct->TIM_OSSRState = TIM_OSSRState_Disable; TIM_BDTRInitStruct->TIM_OSSIState = TIM_OSSIState_Disable; TIM_BDTRInitStruct->TIM_LOCKLevel = TIM_LOCKLevel_OFF; TIM_BDTRInitStruct->TIM_DeadTime = 0x00; TIM_BDTRInitStruct->TIM_Break = TIM_Break_Disable; TIM_BDTRInitStruct->TIM_BreakPolarity = TIM_BreakPolarity_Low; TIM_BDTRInitStruct->TIM_AutomaticOutput = TIM_AutomaticOutput_Disable; }[/mw_shl_code] 没有要求让我把TIM1给他，那么他如何知道我是要初始化TIM1的呢？其他部分代码应该没有问题，因为使用tim3时可以输出