关于电机控制的高级定时器的控制问题

江苏大学自动化 · 发表于 2017-11-16 19:30:53

void initPWM(void)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

/* System Clocks Configuration */
{
      /* TIM1, GPIOA, GPIOB, GPIOE and AFIO clocks enable */
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA |// RCC_APB2Periph_GPIOE|
                           RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
}

/* GPIO Configuration */
{
      GPIO_InitTypeDef GPIO_InitStructure;

      /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      /* GPIOB Configuration: BKIN pin */
      //GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
      //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
   // GPIO_Init(GPIOB, &GPIO_InitStructure);
}

/* TIM1 Registers reset */
TIM_DeInit(TIM1);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;
TIM_TimeBaseStructure.TIM_Period = SystemCoreClock / FPWM;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

TIM_OCStructInit(&TIM_OCInitStructure);

/* Channel 1, 2,3 and 4 Configuration in PWM mode */
// Frozen - The comparison between the output compare register TIMx_CCR1 and the counter TIMx_CNT has no effect on the outputs.
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_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
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_OC3Init(TIM1, &TIM_OCInitStructure);

/* Automatic Output enable, Break, dead time and lock configuration*/
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 = DEADTIME;
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_CCPreloadControl(TIM1, ENABLE);

/* TIM1 counter enable */
TIM_Cmd(TIM1, ENABLE);

/* Main Output Disable */
TIM_CtrlPWMOutputs(TIM1, DISABLE);

/* Enable the Update Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

// Resynch to have the Update evend during Undeflow
TIM_GenerateEvent(TIM1, TIM_EventSource_Update);

// Clear Update Flag
TIM_ClearFlag(TIM1, TIM_FLAG_Update);

TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);
}
谁能帮我看看为什么我刚给stm32供电六个通道就是高电平