关于定时器14的配置，程序死在了NVIC配置上。程序如下

咆哮的阿杰 · 发表于 2017-7-12 15:02:24

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14,ENABLE);

  TIM_TimeBaseInitStructure.TIM_Period = arr; //自动重装载值
TIM_TimeBaseInitStructure.TIM_Prescaler=psc;  //定时器分频
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM14,&TIM_TimeBaseInitStructure);

TIM_ITConfig(TIM14,TIM_IT_Update,ENABLE);
TIM_Cmd(TIM14,ENABLE);

LCD_ShowString(30,210,200,16,16,"TIM_Cmd success");

NVIC_InitStructure.NVIC_IRQChannel=TIM8_TRG_COM_TIM14_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0x01; //抢占优先级1
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0x03; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);

LCD_ShowString(30,210,200,16,16,"TIM14_init success");

这里两个lcd函数是为了观察函数运行到哪里了，在lcd上只显示了TIM_Cmd successs，然后就死在那里了。