stm32学习笔记---计数器定时中断(1s)-EDA365

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#include "tim_driver.h"

//tim2³õÊ¼»¯:1ÃëÖÓ¸üÐÂÊý¾Ý

void tim2_init(void)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;

//Ê¹ÄÜÊ±ÖÓ

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInitStruct.TIM_Period = 9999;

TIM_TimeBaseInitStruct.TIM_Prescaler = 7199;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);

//Ê¹ÄÜUPDATAµÄÖÐ¶ÏÅäÖÃÎ»

TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

//¶¨Ê±Æ÷Ê¹ÄÜ

TIM_Cmd(TIM2,ENABLE);

}

//tim2ÖÐ¶Ï³õÊ¼»¯

void tim2_NVIC_init(void)

{

NVIC_InitTypeDef NVIC_InitStruct;

NVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn;

NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;

NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStruct.NVIC_IRQChannelSubPriority = 3;

NVIC_Init(&NVIC_InitStruct);

}

void TIM2_IRQHandler(void)

{

if(TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)

TIM_ClearITPendingBit(TIM2, TIM_IT_Update);

uart1_putc('A');

}

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