我在板子上使用TIM1第一通道产生PWM，配置如下：void TIM1_PWM_CH1_Init(void){    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;    TIM_OCInitTypeDef TIM_OCInitStructure;    GPIO_InitTypeDef GPIO_InitStructure;    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;    GPIO_Init(GPIOA, &GPIO_InitStructure);    GPIO_PinAFConfig(GPIOA, GPIO_PinSource8,  GPIO_AF_TIM1);    TIM_DeInit(TIM1);    TIM_TimeBaseStructure.TIM_Period = 2000;    TIM_TimeBaseStructure.TIM_Prescaler = 84-1;    TIM_TimeBaseStructure.TIM_ClockDivision = 0;    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;    TIM_OCInitStructure.TIM_Pulse = 0;    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;    TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;    TIM_OC1Init(TIM1, &TIM_OCInitStructure);    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);    TIM_ARRPreloadConfig(TIM1, ENABLE);    TIM_Cmd(TIM1, ENABLE);    TIM_CtrlPWMOutputs(TIM1, ENABLE);    TIM_SetCompare1(TIM1, 0);//         TIM_Cmd(TIM1, DISABLE);}

如果我在这个之前启动了TIM5的计数器中断，TIM1的输出就会变成高电平，且不受控。
TIM5的配置如下void TIM5_INT_Config(u32 Period){    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;    NVIC_InitTypeDef         NVIC_InitStructure;    uint16_t prescalerValue = 0;    //Enable the TIM2 gloabal Interrupt    NVIC_InitStructure.NVIC_IRQChannel                   = TIM5_IRQn;    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0;    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;    NVIC_Init(&NVIC_InitStructure);    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);    PValue = ((SystemCoreClock /2) / 1000000) - 1;    //Time base configuration    TIM_TimeBaseStructure.TIM_Period        = Period;    TIM_TimeBaseStructure.TIM_Prescaler     = PValue;    TIM_TimeBaseStructure.TIM_ClockDivision = 0;    TIM_TimeBaseStructure.TIM_CounterMode   = TIM_CounterMode_Up;    TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);    TIM_ARRPreloadConfig(TIM5, ENABLE);    //TIM Interrupts enable    //TIM2 enable counter    TIM_Cmd(TIM5, ENABLE);        TIM_ClearITPendingBit(TIM5, TIM_IT_Update);        TIM_ITConfig(TIM5, TIM_IT_Update, ENABLE);        }

后来定位到TIM_ClearITPendingBit(TIM5, TIM_IT_Update);当时为了防止定时器初始化就进中断，清除了标志位，去除这段代码就不会出现这种诡异的现象，理论上不应该啊。求赐教，看TIM1的寄存器都会发生改变。

到后面发现定时器1的TIM.OCInitStructur这个结构的一些参数不为默认值。。。。。不知道什么原因被改了

用仿真器查看TIM1和TIM5的寄存器值，看看配置哪边有问题，逐行代码进行仿真。

加油！光看你贴的代码，（没格式，比较乱），未看到什么异常。