Posted by Joaquim on 2017-04-19 14:19

Hello,

I’m tring to reset a LED register with a timer (TIM4) interrupt, but TIM4_IRQHandler(void); fucntion it’s never launch, the code that i’m using is: (mi board es STM32f429I-DISC1).

Some one can help me please?

Thank you very much for your attention

JPorte.
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

1. include “stm32f4xx.h”

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

void INTTIM_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 10 - 1;
TIM_TimeBaseStructure.TIM_Prescaler =84 - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_ITConfig(TIM4, TIM_FLAG_Update, ENABLE);
TIM_Cmd(TIM4, ENABLE);

NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_SetPriority(TIM4_IRQn, NVIC_EncodePriority(4,15,0));

NVIC_EnableIRQ(TIM4_IRQn);
NVIC_Init(&NVIC_InitStructure);

}

int main(void) {

GPIO_InitTypeDef GPIO_InitDef;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE);

GPIO_InitDef.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14;
GPIO_InitDef.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitDef.GPIO_OType = GPIO_OType_PP;
GPIO_InitDef.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitDef.GPIO_Speed = GPIO_Speed_100MHz;
//Initialize pins
GPIO_Init(GPIOG, &GPIO_InitDef);
GPIO_SetBits(GPIOG, GPIO_Pin_13 | GPIO_Pin_14);

INTTIM_Config();

while (1) {

}

}

void TIM4_IRQHandler(void)
{
GPIO_ResetBits(GPIOG, GPIO_Pin_13 | GPIO_Pin_14);

if (TIM_GetITStatus(TIM4, TIM_FLAG_Update) != RESET)
{
TIM_ClearFlag(TIM4, TIM_FLAG_Update);
GPIO_ResetBits(GPIOG, GPIO_Pin_13 | GPIO_Pin_14);
}
}