STM32 HAL PWM 配置和实现

忘是亡心i 2023-01-23 03:56 142阅读 0赞

一、STM32CubeMX配置  
配置三路PWM输出：  
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main.c 文件

if (HAL_TIM_Base_Start_IT(&htim3) != HAL_OK)	//*50us 
    { 
        Error_Handler();
    }
    
    HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_1);
    HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_2);
    HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_3);
    
    //在while(1) 之前加上上面初始化代码即可
    //{ 
    //}

这里定时器溢出时间为 Tout = ((99 + 1)\*(71 + 1))/72MHz = 100us  
频率为1/Tout = 10000hz = 10KHz  
配置的 Counter Period (也称为arr) 计数周期 如果是99，那么50就是50%占空比

//这个函数修改CCR，修改比较值，修改占空比
    __HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_1, 100);	//控制占空比
    __HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_2, 100);
    __HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_3, 100);

例程：https://download.csdn.net/download/weixin\_37787043/20227345?spm=1001.2014.3001.5503

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