why interrup occerd when TIM1 is not ENABLE??

[hossein hosseini]

Posted on January 25, 2018 at 10:19

hi guys.

i wrote a code with IAR , and when is run the code in stm32f103ret , cpu go to  the interrupt s routin.

i dont know why??!!i want to have 1msecond delay for each timer priode , but i cant do that. when the code runs , cpu go to interrupt routine fanction. i do some thing that i know. but i cant do this activity. this is my code:

who know why I cant??

so thanks.

#include 'stm32f10x.h'

#include 'stm32f10x_gpio.h'  // for Enable LCD#include 'stm32f10x_rcc.h'   //for Enable LCD#include 'stm32f10x_tim.h'#include 'LCDLib.h'#include 'delay.h'void tim_init(void);void GPIO_init(void);void TIM1_UP_TIM16_IRQHandler (void){  int i;  i = TIM_GetPrescaler(TIM1);    lcdGoxy(1 , 2);  lcdPutInt(i);  lcdGoxy(1 , 3);  lcdPutString ('tim activated');  TIM_ClearITPendingBit(TIM1,TIM_IT_Update);}int main(){    lcd_init();   tim_init();  GPIO_init();   while(1){      }    }void tim_init(){          RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;  /* Time base configuration */  TIM_TimeBaseStructure.TIM_Period = 55000;  TIM_TimeBaseStructure.TIM_Prescaler = 55999;  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);    TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);      NVIC_InitTypeDef NVIC_InitStructure;  /* Enable the TIM2 global Interrupt */  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;  NVIC_Init(&NVIC_InitStructure);}void GPIO_init(void){      RCC_APB2PeriphClockCmd  ( RCC_APB2Periph_GPIOA, ENABLE );      GPIO_InitTypeDef gpioA;       gpioA.GPIO_Mode = GPIO_Mode_Out_PP ;  gpioA.GPIO_Pin = GPIO_Pin_0;  gpioA.GPIO_Speed = GPIO_Speed_10MHz;    GPIO_Init  ( GPIOA,  &gpioA ); }

[Tesla DeLorean]

Posted on January 25, 2018 at 16:33

TIM1_UP_IRQn not equivalent to TIM1_UP_TIM16_IRQHandler, needs some coherency. 

Check the name in the vector table in startup_stm32f1xxx.s if there is no linkage, the function isn't going to get called.

If using .CPP files, makes sure to use extern 'C' so the names aren't mangled.

[hossein hosseini]

Posted on January 27, 2018 at 15:11

thanks.

i change  to tim2 . and i change startup file (got it from cube).but cant slove my problem.i test many ways,

i dont know what do i do !!!!

do you have any seggestions for me??

thanks you.

[Tesla DeLorean]

Posted on January 27, 2018 at 15:30

You test many ways but show next to no detail. What file? What are the vectors in it? Consider ZIPing up a project and attaching so the context can be understood.

The sample shown looks to come from SPL rather than Cube/HAL

The TIM divides down 36 MHz, it will interrupt every 85 seconds, not 1 ms

TIM1_UP_IRQHandler would be expected with 

TIM1_UP_IRQn

[hossein hosseini]

Posted on January 27, 2018 at 21:09

thanks.

i just want to have delay from timer counter of stm32. i mean when the counter overflows , then i have an interrupt and in function of interrupt i do somethings.

i wrote code but i dont know when i init the timer/counter , interrupt happened and cpu do the interrupt routin code with no delay.

i havent any delay with timer/counter.

i saw a lot of example and the code was same but the code of mine dosent work.

i use stm32f103ret and IAR.

this is my project file :

https://ufile.io/i4kd5

so thanks.

[Tesla DeLorean · Accepted solution]

Posted on January 27, 2018 at 22:05

&sharpinclude 'stm32f10x.h'

&sharpinclude 'stm32f10x_gpio.h'  // for Enable LCD&sharpinclude 'stm32f10x_rcc.h'   //for Enable LCD&sharpinclude 'stm32f10x_tim.h'&sharpinclude 'LCDLib.h'&sharpinclude 'delay.h'void tim_init(void);void GPIO_init(void);

void TIM1_UP_IRQHandler(void) // assuming startup_stm32f103xe.s pulled

{  static int i = 0;

  if (TIM_GetITStatus(TIM1, TIM_IT_Update) == SET)

  {      TIM_ClearITPendingBit(TIM1,TIM_IT_Update);

        GPIOA->ODR ^= GPIO_Pin_0; // Toggle PA0

    lcdGoxy(1 , 2);

          lcdPutInt(i++); // Incrementing count

      lcdGoxy(1 , 3);

      lcdPutString ('tim activated');    }}

void TIM1_UP_TIM16_IRQHandler(void) // if startup_stm32f10x_hd_vl.s being pulled

{    TIM1_UP_IRQHandler();}int main(){  RCC_ClocksTypeDef RCC_Clocks;  uint32_t j;

  lcd_init();

  lcdPutString ('Believe Your Dreams.');

  tim_init();

  GPIO_init();

  RCC_GetClocksFreq(&RCC_Clocks);

  j = (RCC_Clocks.PCLK2_Frequency/1000);

  lcdGoxy(1 , 4);

  lcdPutInt(j);

  GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET);

  while(1){

  }

}

void tim_init()

{  NVIC_InitTypeDef NVIC_InitStructure;  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

  /* Enable the TIM1 global Interrupt, before we enable it on TIM */

  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

  /* Time base configuration */

  TIM_TimeBaseStructure.TIM_Prescaler = 36000 - 1; // KHz, take 36 MHz clock to 1 KHz  TIM_TimeBaseStructure.TIM_Period = 1000 - 1; // Hz (1) 1000 ticks of 1 KHz clock  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  /* TIM1 enable counter */

  TIM_Cmd(TIM1, ENABLE);

  /* Enable the update interrupt */

  TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);}

void GPIO_init(void)

{  GPIO_InitTypeDef gpioA;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  gpioA.GPIO_Mode = GPIO_Mode_Out_PP;

  gpioA.GPIO_Pin = GPIO_Pin_0;  gpioA.GPIO_Speed = GPIO_Speed_10MHz;  GPIO_Init  (GPIOA,  &gpioA);}

[hossein hosseini]

Posted on January 28, 2018 at 11:33

i am realy thank you.

you help me a lot.

thanks.