stm32f107的高级定时器TIM1无法输出PWM波

1万 · 2021-9-12 14:04

2万 · 2021-9-12 14:06

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

1万 · 2021-9-12 14:14

void TIM1_CH1_PWM_Init(u16 per,u16 psc)

{

      TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;

      TIM_OCInitTypeDef TIM_OCInitStructure;

      GPIO_InitTypeDef GPIO_InitStructure;



      /* 开启时钟 */

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

      RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

      //RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);



      /*  配置GPIO的模式和IO口 */

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_11;

      GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;//推挽输出

      GPIO_Init(GPIOA,&GPIO_InitStructure);

      //GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE);//改变指定管脚的映射

      TIM_TimeBaseInitStructure.TIM_Period=per; //自动装载值

      TIM_TimeBaseInitStructure.TIM_Prescaler=psc; //分频系数

      TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;

      TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //设置向上计数模式

      TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;

      TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);



      TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;

      TIM_OCInitStructure.TIM_Pulse = 1000;

      TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;

      TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;

      TIM_OC1Init(TIM1,&TIM_OCInitStructure); //输出比较通道1初始化

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

      TIM_ARRPreloadConfig(TIM1,ENABLE);//使能预装载寄存器



      TIM_Cmd(TIM1,ENABLE); //使能定时器



      TIM_CtrlPWMOutputs(TIM1, ENABLE);

}