TIM4 CH1初始化
时间: 2024-01-31 19:03:17 浏览: 30
根据提供的引用内容,TIM4 CH1的初始化需要进行以下步骤:
1. 使能TIMTIM4 CH1是指TIM4的通道1,它可以用来产生PWM信号。下面是TIM4 CH1的初始化步骤:
1. 使能TIM4时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
2. 配置TIM4的基本参数 TIM_TimeBaseStructure.TIM_Period = 999; TIM_TimeBaseStructure.TIM_Prescaler = 71; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
3.TIM4 CH1是指TIM4的通道1,它可以用来产生PWM信号。下面是TIM4 CH1的初始化步骤:
1. 使能TIM4时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
2. 配置TIM4的基本参数 TIM_TimeBaseStructure.TIM_Period = 999; TIM_TimeBaseStructure.TIM_Prescaler = 71; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
3. 配置TIM4的通道1 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 500; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC1Init(TIM4, &TIM_OCInitStructure);
4. 使能TIM4的通道1输出 TIM_CtrlPWMOutputs(TIM4, ENABLE);
需要注意的是,TIM4的时钟频率为72MHz,所以TIM4的预分频器值为71时,TIM4的计数器时钟频率为1MHz。TIM4的计数器周期为1000,所以TIM4的计数器溢出时间为1ms。TIM4的通道1的PWM信号的周期为2ms,占空比为50%。