STM32F429 timer

F429 has 14 timers in total

2 advanced TIM1, TIM8

10 general purpose TIM2~TIM5 TIM9~TIM14

2 basic TM6, TIM7 only TIM_Prescaler and TIM_Period

1. Configuration priority

    NVIC_InitTypeDef NVIC_InitStructure; 

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); The interrupt group is 0

    NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn; Interrupt source

    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; Preemption priority

    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; Subpriority

    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);

2.TIM initialization

  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE); Initialize the clock

  TIM_TimeBaseStructure.TIM_Period = 5000-1; Automatic reload value (ie timing time)

  TIM_TimeBaseStructure.TIM_Prescaler = 9000-1; Frequency division coefficient

The following are only available in general and advanced timers

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; Counting mode: count up

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; Division factor

 TIM_TimeBaseStructure.TIM_RepetitionCounter=1;Repetition count

  TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure); Initialize the timer

  TIM_ClearFlag(TIM6, TIM_FLAG_Update); Clear the timer interrupt flag

  TIM_ITConfig(TIM6,TIM_IT_Update,ENABLE); Enable timer update interrupt

    TIM_Cmd(BASIC_TIM, ENABLE); Enable timer

3. Write interrupt service function

void  TIM6_DAC_IRQHandler (void)

{

    if ( TIM_GetITStatus( TIM6, TIM_IT_Update) != RESET ) 

    {    

        LED1_TOGGLE;

        TIM_ClearITPendingBit(TIM6 , TIM_IT_Update);           

    }             

}

The service function name is in stsrtup_stm32f429_439xx.s