求助STM32F407的PWM输出问题

hyandy

TIM1输出互补PWM，代码检查了很多遍，但是示波器测不到输出，请各位大神帮忙看看什么问题。
void timer1_init(void)
{
       
        GPIO_InitTypeDef GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
       
        RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1 ,ENABLE);          //TIM3ê±Öóê1Äü   
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);         //ê1ÄüGPIOAê±Öó       
       
        GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_TIM1);
        GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_TIM1);
       
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;          //GPIOF9
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;        //¸′óÃ1|Äü
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;        //Ëù¶è100MHz
        GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;      //íÆíì¸′óÃêä3ö
        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;      //éÏà-
        GPIO_Init(GPIOA,&GPIO_InitStructure);  
       
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
        GPIO_Init(GPIOA,&GPIO_InitStructure);  
        //GPIO_ResetBits(GPIOA,GPIO_Pin_6);
       
        TIM_TimeBaseStructure.TIM_Prescaler=168-1;  //¶¨ê±Æ÷·ÖÆμ
        TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //ÏòéϼÆêyÄ￡ê½
        TIM_TimeBaseStructure.TIM_Period=25000-1;   //×Ô¶ˉÖØ×°ÔØÖμ
        TIM_TimeBaseStructure.TIM_ClockDivision=0;
        TIM_TimeBaseStructure.TIM_RepetitionCounter=0;       
        TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//3õê¼»ˉ¶¨ê±Æ÷1
       
       
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;       
        TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 12500;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
       
        TIM_OC1Init(TIM1,&TIM_OCInitStructure);
        TIM_OC2Init(TIM1,&TIM_OCInitStructure);
        TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
        TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);
       
       
        TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
        TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
        TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
        TIM_BDTRInitStructure.TIM_DeadTime = 0x01;
        TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
        TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
        TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
        TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
       
        TIM_ARRPreloadConfig(TIM1,ENABLE);
        TIM_Cmd(TIM1, ENABLE);
        //TIM_CCPreloadControl(TIM1,ENABLE);
        TIM_CtrlPWMOutputs(TIM1, ENABLE);
       
       

}

疾如风

http://www.openedv.com/forum.php ... ighlight=407%2BTIM1
可以参考这个大哥的

ZKX182

你定时器时钟使能错了啊，RCC_APB1PeriphClockCmd（RCC_APB2Periph_TIM1，ENABLE）；一个APB1，一个APB2；这么明显。。。。。