只有定时器1的示例，我按照定时器1的示例配置定时器2，就直接死机了
以下为定时器1和定时器2的配置：
void
tiM1_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //使能TIM1时钟
TIM_TimeBaseStructure.TIM_Period = arr; //指定下次更新事件时要加载到活动自动重新加载寄存器中的周期值。
TIM_TimeBaseStructure.TIM_Prescaler =psc; //指定用于划分TIM时钟的预分频器值。
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频因子
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//TIM计数模式，向上计数模式
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位
//初始化TIM NVIC，设置中断优先级分组
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn; //TIM1中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //设置抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //设置响应优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能通道1中断
NVIC_Init(&NVIC_InitStructure); //初始化NVIC
TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE ); //使能TIM1中断，允许更新中断
TIM_Cmd(TIM1, ENABLE); //TIM1使能
}
void TIM2_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟
TIM_TimeBaseStructure.TIM_Period = arr; //指定下次更新事件时要加载到活动自动重新加载寄存器中的周期值。
TIM_TimeBaseStructure.TIM_Prescaler =psc; //指定用于划分TIM时钟的预分频器值。
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频因子
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//TIM计数模式，向上计数模式
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE ); //使能TIM2中断，允许更新中断
//初始化TIM NVIC，设置中断优先级分组
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM2中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //设置抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //设置响应优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能通道1中断
NVIC_Init(&NVIC_InitStructure); //初始化NVIC
TIM_Cmd(TIM2, ENABLE); //TIM2使能
}
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