定时器1通道1和通道4产生两路pwm控制两个电机，只有一个电机能转，一个电机转不了

kroosliu

//初始化电机正反转IO口
void motor_io(void)
{
   GPIO_InitTypeDef GPIO_InitStruct;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//使能PB时钟
   GPIO_InitStruct.GPIO_Pin=GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
   GPIO_InitStruct.GPIO_Mode=GPIO_Mode_Out_PP;
   GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;//推挽输出
   GPIO_Init(GPIOB,&GPIO_InitStruct);//初始化PB12-PB15
   GPIO_SetBits(GPIOB,GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);//PB12-PB15输出高   
}



void motor_pwm(u16 arr,u16 psc)
{
   GPIO_InitTypeDef GPIO_InitStruct;
   TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
    TIM_OCInitTypeDef TIM_OCInitStruct;

   motor_io();//初始化电机正反转IO口

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1|RCC_APB2Periph_GPIOA,ENABLE);//使能定时器1和PA时钟
   GPIO_InitStruct.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_11;
   GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP;
   GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;//推挽输出
   GPIO_Init(GPIOA,&GPIO_InitStruct);//初始化PA8,PA11

   //初始化定时器1   
   TIM_TimeBaseInitStruct.TIM_Period=arr;
   TIM_TimeBaseInitStruct.TIM_Prescaler=psc;
   TIM_TimeBaseInitStruct.TIM_ClockDivision=TIM_CKD_DIV1;
   TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up;
   TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStruct);

   //初始化定时器1的通道1为PWM模式1  
   TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM1;
   TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
   TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
   TIM_OC1Init(TIM1,&TIM_OCInitStruct);
   //TIM1->CCMR1|=6<<4;         //CH1 PWM1模式  
   //TIM1->CCER|=1<<0;          //CH1输出使能

   //初始化定时器1的通道4为PWM模式1
   TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM1;
   TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
   TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
   TIM_OC4Init(TIM1,&TIM_OCInitStruct);   


   //使能TIM1在CCR1和CCR4上的预装载寄存器
   TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
   TIM_OC4PreloadConfig(TIM1,TIM_OCPreload_Enable);

   //使能定时器1外设的主输出
   TIM_CtrlPWMOutputs(TIM1,ENABLE);

   //使能自动重装载预装载寄存器
   TIM_ARRPreloadConfig(TIM1,ENABLE);

      //使能定时器1
   TIM_Cmd(TIM1,ENABLE);
}
通道1的电机转不了，通道4的电机可以转。
把初始化定时器1的通道1为PWM模式1的那几行库函数代码改成下面的两行寄存器代码，通道1的电机又可以转了。
请问这个程序哪里写错了？

正点原子

帮顶

kroosliu

好奇怪啊，通道1和通道4的程序是一模一样的，通道1的电机转不了，通道4的电机可以转

zhangyimj007

/* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 999;
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OC1Init(TIM3, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val;

  TIM_OC2Init(TIM3, &TIM_OCInitStructure);

  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR3_Val;

  TIM_OC3Init(TIM3, &TIM_OCInitStructure);

  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val;

  TIM_OC4Init(TIM3, &TIM_OCInitStructure);

  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM3, ENABLE);

  /* TIM3 enable counter */
  TIM_Cmd(TIM3, ENABLE);

同一个TIM，不通通道PWM设置。

asdsa

解决了吗

ycc1169

zhangyimj007 发表于 2016-1-28 14:10
/* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 999;
  TIM_TimeBaseStructure.TI ...

通道一和通道四的pwm模式不一样吧，一个是选1.一个是选二