我想用定时器定时10分钟发生一次中断，时钟90M，重载值应该设置多少啊

郭子

还没定过这么长时间，一般溢出时间都是以us为单位的，我怎么样才能定到10分钟运行一次呢，新手上路，望大神指点迷津，感谢各位大佬了

jkd405

设多少也到不了10分钟啊，你可以配置一个1s的定时器，然后里面手动计数每到6000执行一次

farmer30175

int k=0;
int main(void)
{
    /* ?? -------------------------------------------------------------*/
    NVIC_InitTypeDef NVIC_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

    /* ?? TIM2 ?GPIOD ? RCC?? ----------------------------------------------------*/
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

    /* ?? TIM2_IRQn ?? -------------------------------------------------------------*/
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* TIM2 ???? -------------------------------------------------------------*/
    // ????????
    TIM_TimeBaseStructure.TIM_Period =1000 - 1;
    // ???????
    TIM_TimeBaseStructure.TIM_Prescaler = 168000 - 1;
    // ??????
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    // ???????
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    // ?????????????
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
    // ???????????
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);




    /* ?? TIM2 ??? */
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
    /* ?? TIM2 ??? */
    TIM_Cmd(TIM2, ENABLE);


    /* PD12,PD13,PD14,PD15 ??? -----------------------------------------------------*/
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOD, &GPIO_InitStructure);

    while (1)
                {
                if((k%20)==0)
                {
                        //GPIO_ToggleBits(GPIOD, GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);
                        //set the  interrupt flag
                }
               
                }
}

/*
* TIM2_IRQHandler() ???????,???????? startup_stm32f4xx.s ?????
* ??? ????????,??????? stm32f4xx_it.c ?
*/
void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)
    {
        // ? PD12,13,14,15 ? LED ??/??
                                k++;      
        // ?? TIM2
        TIM_ClearITPendingBit(TIM2, /*TIM_IT_Update*/ TIM_FLAG_Update);
    }
}


//10秒的  改K值  不知道可不可行  照樓上大大的試了一下