基于STM32F429的高级定时器PWM输出问题

简单的旅行 · 发表于 2018-5-25 10:35:49

void TIM2_PWM_Init(u16 arr,u16 psc)
{
TIM_OC_InitTypeDef TIM2_CHxHandler;
TIM2_Handler.Instance=TIM2;
TIM2_Handler.Init.Prescaler=psc;
TIM2_Handler.Init.CounterMode=TIM_COUNTERMODE_UP;
TIM2_Handler.Init.Period=arr;
TIM2_Handler.Init.ClockDivision=TIM_CLOCKDIVISION_DIV1;
HAL_TIM_PWM_Init(&TIM2_Handler);

      TIM2_CHxHandler.OCMode=TIM_OCMODE_PWM1;
TIM2_CHxHandler.Pulse=(arr+1)/2-1;
TIM2_CHxHandler.OCPolarity=TIM_OCPOLARITY_LOW;
HAL_TIM_PWM_ConfigChannel(&TIM2_Handler,&TIM2_CHxHandler,TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&TIM2_Handler,TIM_CHANNEL_2);
}

void TIM1_PWM_Init(u16 arr,u16 psc)
{
TIM_OC_InitTypeDef TIM1_CHxHandler;
TIM1_Handler.Instance=TIM1;
TIM1_Handler.Init.Prescaler=psc;
TIM1_Handler.Init.CounterMode=TIM_COUNTERMODE_UP;
TIM1_Handler.Init.Period=arr;
TIM1_Handler.Init.ClockDivision=TIM_CLOCKDIVISION_DIV1;
HAL_TIM_PWM_Init(&TIM1_Handler);

  TIM1_CHxHandler.OCMode=TIM_OCMODE_PWM1;
TIM1_CHxHandler.Pulse=(arr+1)/2-1;
TIM1_CHxHandler.OCPolarity=TIM_OCPOLARITY_LOW;
HAL_TIM_PWM_ConfigChannel(&TIM1_Handler,&TIM1_CHxHandler,TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&TIM1_Handler,TIM_CHANNEL_1);
HAL_TIM_PWM_Stop(&TIM1_Handler,TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&TIM1_Handler,TIM_CHANNEL_1);
}
void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)
{if(htim==&TIM1_Handler)
  {
__HAL_RCC_TIM1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();

GPIO_Initure.Pin=GPIO_PIN_8;            //PA3
GPIO_Initure.Mode=GPIO_MODE_AF_PP;
GPIO_Initure.Pull=GPIO_PULLUP;       //éÏà-
GPIO_Initure.Speed=GPIO_SPEED_HIGH;
GPIO_Initure.Alternate= GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA,&GPIO_Initure);
  }
else if(htim==&TIM2_Handler)
  {
__HAL_RCC_TIM2_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
//PB3
GPIO_Initure.Pin=GPIO_PIN_3;
GPIO_Initure.Mode=GPIO_MODE_AF_PP;
GPIO_Initure.Pull=GPIO_PULLUP;
GPIO_Initure.Speed=GPIO_SPEED_HIGH;
GPIO_Initure.Alternate= GPIO_AF1_TIM2;
HAL_GPIO_Init(GPIOB,&GPIO_Initure);
  }

}

int main(void)
{
HAL_Init();
Stm32_Clock_Init(360,25,2,8);
delay_init(180);
uart_init();
LED_Init();

TIM1_PWM_Init(500-1,90-1);
TIM2_PWM_Init(500-1,90-1);

while(1)
{
delay_ms(100);
LED0=!LED0;
}
}
上面是我的定时器TIM1和TIM2的配置，但是TIM1没有脉冲输出，TIM2输出正常，不知道什么原因，希望有做过的人给一下指导意见！