采用TIM1产生3对互补PWM，使能中断后，就输出不了波形

crossok

用TIM1产生3对PWM控制BLDC , 需要对占空比进行调节，设置了定时器的溢出中断和COM中断

TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE); //使能刷新中断
TIM_ITConfig(TIM1, TIM_IT_COM, ENABLE); //使能比较

注释掉这两条就能正常生成波形

开启后就输出不了，使能中断还配合什么设置吗

正点原子

回复【2楼】crossok:
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你是没有中断服务函数吧。。。

crossok

回复【4楼】正点原子:
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嗯，是中断函数的问题
void TIM1_TRG_COM_IRQHandler()
{
TIM_ClearITPendingBit(TIM1, TIM_IT_COM);
        ..................
}


//********************************************************************************  

void TIM1_UP_IRQHandler()
{
TIM_ClearITPendingBit(TIM1, TIM_IT_Update);
        ................
}


加上这两条就OK了，谢谢，我是不是可以这么理解，没清中断标志导致一直进中断造成的啊？？？？？？？？

crossok

有知道的指导下我吧

void timer_initPWM(void)
{
TIM_TimeBaseInitTypeDef TIM_BaseStructure;
TIM_OCInitTypeDef       TIM_OcStructure;
TIM_BDTRInitTypeDef     TIM_BdtrStructure;
NVIC_InitTypeDef NVICInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

//Kommutierungsinterrupt im NVIC eintragen
NVICInitStructure.NVIC_IRQChannel                   = TIM1_TRG_COM_IRQn;
NVICInitStructure.NVIC_IRQChannelPreemptionPriority = TIM1_PRE_EMPTION_PRIORITY;
NVICInitStructure.NVIC_IRQChannelSubPriority        = TIM1_SUB_PRIORITY;
NVICInitStructure.NVIC_IRQChannelCmd                = ENABLE;
NVIC_Init(&NVICInitStructure);

//TMR1 刷新中断
NVICInitStructure.NVIC_IRQChannel                   = TIM1_UP_IRQn;
NVICInitStructure.NVIC_IRQChannelPreemptionPriority = TIM1_PRE_EMPTION_PRIORITY;
NVICInitStructure.NVIC_IRQChannelSubPriority        = TIM1_SUB_PRIORITY;
NVICInitStructure.NVIC_IRQChannelCmd                = ENABLE;
NVIC_Init(&NVICInitStructure);

//Deinitializes the TIM1 peripheral registers to their default reset values
TIM_DeInit(TIM1);

//(TIM1CLK = SYSCLK = 72MHz) => MAX_PWM_VALUE=3600 => f_PWM=20kHz (unsymmetrische PWM)(50us)
TIM_BaseStructure.TIM_Period            = MAX_PWM_VALUE; //自动装载值，累计次数
TIM_BaseStructure.TIM_Prescaler         = 0;
TIM_BaseStructure.TIM_ClockDivision     = TIM_CKD_DIV1;
TIM_BaseStructure.TIM_CounterMode       = TIM_CounterMode_CenterAligned2; //TIM1中央对齐模式2
TIM_BaseStructure.TIM_RepetitionCounter = 1;
TIM_TimeBaseInit(TIM1, &TIM_BaseStructure);

//Einstellungen f黵 Kanal 1, 2 und 3 (alle gleich)
TIM_OcStructure.TIM_OCMode       = TIM_OCMode_Timing; //TMR1 输出比较时间模式
TIM_OcStructure.TIM_OutputState  = TIM_OutputState_Enable; //使能输出比较状态
TIM_OcStructure.TIM_OutputNState = TIM_OutputNState_Enable; //使能输出比较N状态
TIM_OcStructure.TIM_Pulse        = 1000; //待装入捕获比较寄存器的脉冲值
TIM_OcStructure.TIM_OCPolarity   = TIM_OCPolarity_High; //TMR1输出比较极性高
TIM_OcStructure.TIM_OCNPolarity  = TIM_OCNPolarity_High; //TMR1输出比较N极性高
TIM_OcStructure.TIM_OCIdleState  = TIM_OCIdleState_Set; //当MOE=0设置TIM1输出比较空闲状态
TIM_OcStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set; //当MOE=0设置TIM1输出比较N空闲状态
TIM_OC1Init(TIM1, &TIM_OcStructure);
TIM_OC2Init(TIM1, &TIM_OcStructure);
TIM_OC3Init(TIM1, &TIM_OcStructure);

//Einstellungen f黵 Totzeit und automatische Ausgabe der PWMs
TIM_BdtrStructure.TIM_OSSRState       = TIM_OSSRState_Enable; //使能TIM1 OSSR状态
TIM_BdtrStructure.TIM_OSSIState       = TIM_OSSIState_Enable; //使能TIM1 OSSI状态
TIM_BdtrStructure.TIM_LOCKLevel       = TIM_LOCKLevel_OFF; //不锁任何位
TIM_BdtrStructure.TIM_DeadTime        = 1; //输出打开和关闭状态之间的延时，死区时间
TIM_BdtrStructure.TIM_Break           = TIM_Break_Disable; //失能TIM1刹车输入
TIM_BdtrStructure.TIM_BreakPolarity   = TIM_BreakPolarity_High; //TIM1刹车输入管脚极性高
TIM_BdtrStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; //自动输出功能使能
TIM_BDTRConfig(TIM1, &TIM_BdtrStructure);

TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE); //使能刷新中断
TIM_ITConfig(TIM1, TIM_IT_COM, ENABLE); //使能比较

TIM_CCPreloadControl(TIM1, ENABLE); //使能TMR1捕获比较控制位

//TIM1 aktivieren
TIM_Cmd(TIM1, ENABLE); //使能TMR1

//PWM-Ausg鋘ge aktivieren
TIM_CtrlPWMOutputs(TIM1, ENABLE); //使能TIM1的主输出
}

愤怒的小猪

回复【2楼】crossok:
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你好，你的问题解决了吗？我也遇到和您一样的问题，想请教您，麻烦留个qq

crossok

回复【3楼】愤怒的小猪:
---------------------------------
我还是第一次用STM32做项目，菜的很呢 。1304256523

正点原子

回复【5楼】crossok:
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恩