NVIC_Init函数为什么没法执行

Tritium

在用JLink调试的时候发现代码卡在NVIC_Init函数上了，求解怎么回事，实在弄不明白了。。。代码基本和教学书上的一样

[mw_shl_code=c,true]#include "timer.h" #include "led.h" void TIM4_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE); TIM_TimeBaseStructure.TIM_Prescaler=psc; TIM_TimeBaseStructure.TIM_Period=arr; TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure); TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE); NVIC_InitStructure.NVIC_IRQChannel=TIM4_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; NVIC_InitStructure.NVIC_IRQChannelSubPriority=3; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_Cmd(TIM4,ENABLE); }[/mw_shl_code]

正点原子

没有中断服务函数？
看死哪里，再去分析问题