最简单的闪灯进不了中断

zylxcu 提问时间：2013-5-16 09:14 /

#include"stm32f10x.h"
#include"stm32f10x_gpio.h"
#include"stm32f10x_rcc.h"
#include"misc.h"

#include"stm32f10x_tim.h"
#include"stm32f10x_conf.h"
void gpio_Init(void);
void nvic_Init(void);
void TIM_Init(void) ;
int main()
{

gpio_Init();
nvic_Init();
TIM_Init();
while(1)
{
      GPIO_ResetBits(GPIOG, GPIO_Pin_13);
   GPIO_SetBits(GPIOG, GPIO_Pin_12);

}
}

void gpio_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOG, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOG, &GPIO_InitStructure);
}

void nvic_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM_Init(void)
{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_ARRPreloadConfig(TIM2, ENABLE);
TIM_DeInit(TIM2);      //TIMx寄存器重设为缺省值
TIM_TimeBaseStructure.TIM_Period = 29999;
TIM_TimeBaseStructure.TIM_Prescaler=7199;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
TIM_ClearFlag(TIM2,TIM_FLAG_Update);
TIM_Cmd(TIM2, ENABLE);     //TIM2开启时钟
}
void TIM2_IRQHandler(void)
{
GPIO_ResetBits(GPIOG, GPIO_Pin_12);
GPIO_SetBits(GPIOG, GPIO_Pin_13);
TIM_ClearITPendingBit(TIM2, TIM_FLAG_Update);
}