STM32
直播中

池鹄展

7年用户 952经验值
擅长:可编程逻辑 电源/新能源
私信 关注
[问答]

怎样去设置STM32F0 Timer1为PWM模式呢

怎样去设置STM32F0 timer1为PWM模式呢?其程序是怎样的?

回帖(1)

王伊

2021-10-21 17:13:49
  设置PA7 作为 PWM输出
  void TIM_IO_Config(void)
  {
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;//
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_2);
  }
  设置Timer1 为PWM模式,使能,使能PWM输出
  void TIM_PWM_Config(void)
  {
  /¼ÆËãÔ¤¶¨±íµÄÖµ£¬Ò²¾ÍÊǶàÉÙ¸öʱÖÓ¼ÆÊýΪһ¸öÖÜÆÚ/
  TimerPeriod = (SystemCoreClock / 17570 ) - 1;
  /¼ÆËãCCR1 Ìøתֵ ÔÚÕ¼¿Õ±ÈΪ50%ʱ/
  Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
  /* TIM1 ʱÖÓʹÄÜ /
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 , ENABLE);
  / Time ¶¨Ê±»ù´¡ÉèÖÃ*/
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; /* Time ¶¨Ê±ÉèÖÃΪÉÏÉýÑؼÆËãģʽ*/
  TIM_TimeBaseStructure.TIM_Period = TimerPeriod;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
  /* ƵµÀ1£¬2£¬3£¬4µÄPWM ģʽÉèÖà */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_Pulse = Channel1Pulse;//ʹÄÜƵµÀ1ÅäÖÃ
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);
  /* TIM1 ¼ÆËãÆ÷ʹÄÜ*/
  TIM_Cmd(TIM1, ENABLE);
  /* TIM1 Ö÷Êä³öʹÄÜ */
  TIM_CtrlPWMOutputs(TIM1, ENABLE);
  }
举报

更多回帖

发帖
×
20
完善资料,
赚取积分