void TIM_ClearOC4Ref(TIM_TypeDef* TIMx, uint16_t TIM_OCClear); void TIM_OC1PolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPolarity); //单独设置输出比较极性,带N就是高级定时器互补通道的配置,OC4没有互补通道 void TIM_OC1NPolarity
TIM_Period = 100 - 1; TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1; //输出10000Hz的方波 TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure); /* 因为有些结构体成员对TIM2无效,所以要为TIM_OCInitStructure每个成员设置默认值 */ TIM_...
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; // 输出使能 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //我上面是向上计数输出所以CNT<CCR时有效配置此时输出为高电平 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_Pulse = c ; TIM_OC1Init(TIM...
TIM_OCInit(TIM2, &TIM_OCInitStructure); TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable); TIM_OCInitStructure.TIM_Channel = TIM_Channel_3; TIM_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OCInit(TIM2, &TIM_OCInitStructure); TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable); TIM_OCInitStructur...
HAL_TIM_PWM_Init(&TIM_OCInitStructure); // 初始化PWM参数 } 在上面的代码中,我们首先打开了TIM2的时钟,然后初始化了定时器的基础参数和PWM参数。通过设置预分频器为0,我们可以让定时器不分频,从而直接计数。通过设置比较寄存器的脉冲宽度,我们可以控制PWM波的占空比。 要生成不同频率的PWM波,你只需要修改定时...
// 输出使能TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;// 输出通道电平极性配置TIM_...
利用STM32的定时器(TIM)产生PWM信号,通过调整PWM的占空比来控制RGB LED的亮度,从而实现颜色的调节。 void TIM_PWM_Init(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); TIM_TimeBaseStructure.TIM_Period =...
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; //设置定时器工作在翻转模式 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //设置4个通道 比较寄存器值 TIM_OCInitStructure.TIM_Pulse = CCR1_Val; ...
这是STM32数据手册上对TIM3通用定时器复用功能重映象的描述,假设让PA6作为PWM输出,从图中可以看出PA6对应TIM3的通道1, 使能TIM3通道1的函数为 TIM_OC1Init();1 同样的,如果想要使能PA7,它对应的是TIM3的通道2,那么使能通道2的函数便是: TIM_OC2Init()1 ...
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高 ...