如题,谢谢大家指导~~ [mw_shl_code=c,true]void TIM1_PWM_Init(u32 arr,u32 psc) { //????·??è????????IO???è?? GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM1_BDTRInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE); //TIM1?±?????? RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE); //????PORTB?±?? RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); //????PORTA?±?? GPIO_PinAFConfig(GPIOB,GPIO_PinSource13|GPIO_PinSource14|GPIO_PinSource15,GPIO_AF_TIM1); //GPIOB15~13???????¨?±?÷1:CH1N,CH2N,CH3N GPIO_PinAFConfig(GPIOA,GPIO_PinSource8|GPIO_PinSource9|GPIO_PinSource10|GPIO_PinSource11,GPIO_AF_TIM1);//GPIOA8~11???????¨?±?÷1:CH1,CH2,CH3,CH4 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_13|GPIO_Pin_14; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //????100MHz GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //???ì???????? GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //???? GPIO_Init(GPIOB,&GPIO_InitStructure); //??????PB13~15 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11; //GPIOF9 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //????100MHz GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //???ì???????? GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //???? GPIO_Init(GPIOA,&GPIO_InitStructure); //??????PA8~11 TIM_DeInit(TIM1); TIM_TimeBaseStructure.TIM_Prescaler=psc; //?¨?±?÷·??? TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //?ò?????????? TIM_TimeBaseStructure.TIM_Period=arr; //×?????×°???? TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0; TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//???????¨?±?÷1 TIM_ARRPreloadConfig(TIM1,ENABLE);//ARPE???? //??????TIM1 Channel~3,Channel1N~3N PWM???? TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //?????¨?±?÷????:TIM?????í???÷??????2 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±??????????? TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;//±??????????? TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; //????????:TIM????±????????? TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //????????:TIM????±????????? TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_Pulse = 200; TIM_OC1Init(TIM1, &TIM_OCInitStructure); //?ù??T???¨???????????????èTIM1OC1 TIM_OC2Init(TIM1, &TIM_OCInitStructure); //?ù??T???¨???????????????èTIM1OC2 TIM_OC3Init(TIM1, &TIM_OCInitStructure); //?ù??T???¨???????????????èTIM1OC3 TIM_OC4Init(TIM1, &TIM_OCInitStructure); //?ù??T???¨???????????????èTIM1OC4 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //????TIM1??CCR1?????¤×°???????÷ TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); //????TIM1??CCR1?????¤×°???????÷ TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); //????TIM1??CCR1?????¤×°???????÷ TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable); //????TIM1??CCR1?????¤×°???????÷ TIM1_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; TIM1_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; TIM1_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; TIM1_BDTRInitStructure.TIM_DeadTime = 7; TIM1_BDTRInitStructure.TIM_Break = TIM_Break_Disable; TIM1_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; TIM1_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStructure); TIM_ARRPreloadConfig(TIM1,ENABLE); TIM_CCPreloadControl(TIM1, ENABLE); TIM_SelectCOM(TIM1,ENABLE); TIM_Cmd(TIM1, ENABLE); //????TIM1 TIM_CtrlPWMOutputs(TIM1, ENABLE); } [/mw_shl_code]