STM32 F3定时器问题，为什么没有现象（灯亮）？

chen13480200

PE口有接LED，STM32F3Discovery板
主函数
#include "stm32f30x_gpio.h"

#include "stm32f30x_rcc.h"

#include "stm32f30x_misc.h"

#include "stm32f30x_syscfg.h"

#include "stm32f30x_tim.h"

void GPIOinit (void)//LEDI/O????????

{

GPIO_InitTypeDef        GPIO_InitStructure;

   /* GPIOE Periph clock enable */

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOE, ENABLE);

  

  /* Configure PE14 and PE15 in output pushpull mode */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15 | GPIO_Pin_14 | GPIO_Pin_13 |GPIO_Pin_12|GPIO_Pin_11|GPIO_Pin_10|GPIO_Pin_9|GPIO_Pin_8;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOE, &GPIO_InitStructure);

}

void Delay_us(u16 time)    //???????????±????

{

  u16 i=0;

while(time--)

{

i=10;

while(i--);

}

}

 void Time_Config(void) 

 {

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

RCC_APB2PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);

//TIM_DeInit(TIM2);

  /* Time Base configuration */

   TIM_TimeBaseStructure.TIM_Prescaler = (36000-1);

   TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

   TIM_TimeBaseStructure.TIM_Period = (2000-1);

   TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

   TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_ClearFlag(TIM2,TIM_FLAG_Update);

TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);

TIM_Cmd(TIM2, ENABLE);

 }

 void NVIC_Config(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);  

 

}

int main(void)

{

            GPIOinit();

   Time_Config();

   NVIC_Config();

while(1)

{

}

 

}
中断函数：在 stm32f30x_it.c 中

void TIM3_IRQHandler(void)

{

if(TIM_GetITStatus(TIM2,TIM_IT_Update)!=RESET)

{

     TIM_ClearITPendingBit(TIM2,TIM_FLAG_Update);

   

   GPIOE->BSRR|=0xff00; 

}

}

chen13480200

回复【楼主位】chen13480200:
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打错了一句：中断函数中是TIM2

正点原子

帮顶。

chen13480200

回复【3楼】正点原子:
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原子哥，论坛里STM32F3资料好少啊

chen13480200

回复【楼主位】chen13480200:
---------------------------------
找到问题了，要先进行NVIC初始化，然后再Tim初始化

正点原子

回复【4楼】chen13480200:
---------------------------------
恩，103的比较多。