F405芯片，互补PWM输出问题

a3413209

使用f405rgt6，PA7和PA8引脚通过定时器1复用输出互补pwm，输出结果两者保持一致，请教一下是什么问题？配置程序如下：

void cfg_init_pwm_trigger_out_b()
{

        GPIO_InitTypeDef GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
        TIM_OCInitTypeDef TIM_OCInitStructure;
        TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
       
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);          //TIM1ê±?óê1?ü   
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);         //ê1?üPORTFê±?ó       
       
        GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_TIM1); //GPIOA8?′ó??a?¨ê±?÷1
        GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_TIM1); //GPIOA7?′ó??a?¨ê±?÷1
       
        GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_8 | GPIO_Pin_7;           //GPIOA8+7
        GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;        //?′ó?1|?ü
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;        //?ù?è50MHz
        GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;      //í?íì?′ó?ê?3?
        GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;        //é?à-
        GPIO_Init(GPIOA,&GPIO_InitStructure);              //3?ê??ˉPA8
       
        TIM_TimeBaseInitStructure.TIM_Period = D_SET_PRE_TIM4_PERIOD;
        TIM_TimeBaseInitStructure.TIM_Prescaler = D_SET_PRE_TIM4_PRESCAL;
        TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
        TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);

        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 = 0;
        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_OCIdleState_Reset;

        TIM_OC1Init(TIM1, &TIM_OCInitStructure);
        TIM_OC1PreloadConfig(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 = 0;
        TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
        TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;
        TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
        TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
        TIM_Cmd(TIM1, ENABLE);
        TIM_CCxCmd(TIM1,TIM_Channel_1, TIM_CCx_Enable);
        TIM_CCxNCmd(TIM1,TIM_Channel_1, TIM_CCxN_Enable);
        TIM_CCPreloadControl(TIM1,ENABLE);
        TIM_CtrlPWMOutputs(TIM1, ENABLE);
}

a3413209

ok了，没问题了

peng1554

帮顶~~

plue

12点54的发的帖子有问题，12点55就没问题了是什么鬼，怎么总是有人自作聪明？