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stm32輸出PWM波形輸出波形為什么有兩個(gè)請(qǐng)問程序怎么改

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發(fā)布時(shí)間: 2019-9-3 14:21

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stm32輸出PWM波形輸出波形為什么有兩個(gè)請(qǐng)問程序怎么改，請(qǐng)教各位

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ID:212177 發(fā)表于 2019-9-5 17:29
定時(shí)器的參數(shù)發(fā)生了變化？還是你用了多個(gè)定時(shí)器干擾了？
ID:213896 發(fā)表于 2019-9-5 17:17
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);

        TIM_TimeBaseStructure.TIM_Period = Period;
        TIM_TimeBaseStructure.TIM_Prescaler = 0;
        TIM_TimeBaseStructure.TIM_ClockDivision = 0;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
        TIM_OC1Init(TIM3, &TIM_OCInitStructure);
        TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Update);
        TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable);
        TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
        TIM_ARRPreloadConfig(TIM3, ENABLE);
ID:213896 發(fā)表于 2019-9-5 17:16
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);

        TIM_TimeBaseStructure.TIM_Period = Period;
        TIM_TimeBaseStructure.TIM_Prescaler = 0;
        TIM_TimeBaseStructure.TIM_ClockDivision = 0;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
        TIM_OC1Init(TIM3, &TIM_OCInitStructure);
        //TIM_OC2Init(TIM3, &TIM_OCInitStructure);
        TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Update);
        TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable);
        TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
        //TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
        TIM_ARRPreloadConfig(TIM3, ENABLE);
ID:411221 發(fā)表于 2019-9-5 12:50
dd 自己頂貼

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