物联网实战--入门篇之(八)嵌入式-空气净化器

最新推荐文章于 2024-05-15 16:21:44 发布

2401_83704125

最新推荐文章于 2024-05-15 16:21:44 发布

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TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_Period = PWMPeriodValue-1; // 周期为10k
TIM_TimeBaseStructure.TIM_Prescaler = 720 - 1; // 预分频器设置为7199，确保计数器的频率为1MHz
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;	
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//选择PWM模式1
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//输出比较极性选择
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//输出使能
TIM_OC1Init(TIM1, &TIM_OCInitStructure);//初始化 TIM1 OC1
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);//使能CCR1自动重装
TIM_ARRPreloadConfig(TIM1,ENABLE);//开启预装载  
TIM_CtrlPWMOutputs(TIM1, ENABLE);//手动开启,防止与串口1冲突后不启动


// 使能TIM1的输出比较预装载寄存器
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

// 使能TIM1
TI