STM32定时器配置

void TIM1_Int_Init(u16 arr,u16 psc)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //①时钟 TIM1 使能

//定时器 TIM1 初始化

TIM_TimeBaseStructure.TIM_Period = arr; //设置自动重装载寄存器周期的值

TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置时钟频率除数的预分频值

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM 向上计数

TIM_TimeBaseStructure.TIM_RepetitionCounter=0; //高级定时器1是用定时器功能配置这个才可以是正常的计数频率一开始的72mhz 值得注意的地方

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //②初始化 TIM1

TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE ); //③允许更新中断

//中断优先级 NVIC 设置

NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn; //TIM1 中断

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级 1 级

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级 3 级

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ 通道被使能

NVIC_Init(&NVIC_InitStructure); //④初始化 NVIC 寄存器

TIM_Cmd(TIM1, ENABLE); //⑤使能 TIM1

}

void TIM1_UP_IRQHandler(void) //TIM1 中断

{

if (TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET) //检查 TIM1 更新中断发生与否

{

TIM_ClearFlag(TIM1, TIM_IT_Update ); //清除 TIM1 更新中断标志

LED1=!LED1;

}

}

上面红字必须注意 因为高级定时器的时基是四个 比通用定时器多一个：

顺便再来一个通用定时器的配置：

void TIM4_Int_Init(u16 arr,u16 psc)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //时钟使能

 

//定时器TIM4初始化

TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值

TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式

TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

 

TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE ); //使能指定的TIM4中断,允许更新中断

//中断优先级NVIC设置

NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; //TIM3中断

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能

NVIC_Init(&NVIC_InitStructure); //初始化NVIC寄存器

TIM_Cmd(TIM4, ENABLE); //使能TIMx

}

//定时器4中断服务程序

void TIM4_IRQHandler(void) //TIM3中断

{

if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET) //检查TIM4更新中断发生与否

{

TIM_ClearITPendingBit(TIM4, TIM_IT_Update ); //清除TIMx更新中断标志

LED0=!LED0;

// Get_Angle();

}

}