关于TIM3定时器输出PWM

jasonflash

我使用原子的pwm输出例程，自己又添加了另外两路pwm，输出分别是PC8和PC9引脚。而且自己又添加了端口完全重映射语句：GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);
保留之前原子历程中PB5输出的部分重映射语句： GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE); 测试后发现，没有任何引脚有pwm输出，我把自己添加的端口完全重映射语句注释掉以后，PB5输出pwm，PC8和PC9仍无输出。已初始化io口并使能时钟。求解！！！

旺旺佳

部分重映射和完全重映射不能同时用吧。
你既然注释掉了 完全重映射 也就是说是 部分重映射 PC8 PC9肯定就没输出了，部分重映射PB0->TIM3-CH3   PB1->TIM3-CH4 所以应该PB0 和PB1有输出

jasonflash

void TIM3_PWM_Init(u16 arr,u16 psc)
{  
        GPIO_InitTypeDef GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        NVIC_InitTypeDef NVIC_InitStructure;
       

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);        //ʹÄܶ¨Ê±Æ÷3ʱÖÓ
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB  | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO , ENABLE);
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5; //TIM_CH2
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
        GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE);  

       
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOC, &GPIO_InitStructure);
        GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);

        TIM_TimeBaseStructure.TIM_Period = arr;
        TIM_TimeBaseStructure.TIM_Prescaler =psc;
        TIM_TimeBaseStructure.TIM_ClockDivision = 0;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
        TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
        TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE );
       
        NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);  
       
       
        //³õʼ»¯TIM3 Channel2 PWMģʽ         
        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
        TIM_OC2Init(TIM3, &TIM_OCInitStructure);  
        TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  
       
        TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
        TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;
  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
        TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
       
        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
        TIM_OC3Init(TIM3, &TIM_OCInitStructure);  
        TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);  

        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
        TIM_OC4Init(TIM3, &TIM_OCInitStructure);  
        TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);  
       
       
       
       

        TIM_Cmd(TIM3, ENABLE);  //ʹÄÜTIM3
       

}

jasonflash

旺旺佳 发表于 2016-10-9 12:32
部分重映射和完全重映射不能同时用吧。
你既然注释掉了 完全重映射 也就是说是 部分重映射 PC8 PC9肯定就 ...

感谢回复

zwzcp

啊啊啊啊啊