IRQHandler and RTOS

Posted on May 08, 2012 at 03:26

What you are doing is correct. Single ISR for 5 INT. if you have problem in handling, shift them to other dedicated IOs P0 to 4 which have their own ISR.

I dont think RTOS can handle this either. 

Posted on May 11, 2012 at 14:11

Actually I need of this dedicated IRQ and also IRQs[10...15] and IRQs[5...9]

What should be the solution? A time to wait until the reading of the last signal would be a good option?

/*******************************************************************************

* Function Name  : EXTI15_10_IRQHandler

* Description    : This function handles External lines 15 to 10 interrupt request.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void EXTI15_10_IRQHandler(void)

{

 /* Sensor 0 - Tratamento de Interrupcao */

 if(EXTI_GetITStatus(EXTI_Line10) != RESET)

 {

  tim_sensor0=5;      // 5ms

  sinal_sensor0++;

  EXTI_ClearITPendingBit(EXTI_Line10); 

 }

 /* Sensor 1 - Tratamento de Interrupcao */

 if(EXTI_GetITStatus(EXTI_Line11) != RESET)

 {

  tim_sensor1=5;      // 5ms

  sinal_sensor1++;

  EXTI_ClearITPendingBit(EXTI_Line11); 

 }

 /* Sensor 2 - Tratamento de Interrupcao */

 if(EXTI_GetITStatus(EXTI_Line12) != RESET)

 {

  tim_sensor2=5;      // 5ms

  sinal_sensor2++;

  EXTI_ClearITPendingBit(EXTI_Line12); 

 }

 /* Sensor 3 - Tratamento de Interrupcao */

 if(EXTI_GetITStatus(EXTI_Line13) != RESET)

 {

  tim_sensor3=5;      // 5ms

  sinal_sensor3++;

  EXTI_ClearITPendingBit(EXTI_Line13); 

 }

 /* Sensor 4 - Tratamento de Interrupcao */ 

 if(EXTI_GetITStatus(EXTI_Line14) != RESET)

 {

  tim_sensor4=5;      // 5ms

  sinal_sensor4++;

  EXTI_ClearITPendingBit(EXTI_Line14); 

 }

 /* Sensor 5 - Tratamento de Interrupcao */ 

 if(EXTI_GetITStatus(EXTI_Line15) != RESET)

 {

  tim_sensor5=5;      // 5ms

  sinal_sensor5++;

  EXTI_ClearITPendingBit(EXTI_Line15); 

 }

}

/*******************************************************************************

* Function Name  : TIM2_IRQHandler

* Description    : This function handles TIM2 global interrupt request.

* Time          : 1ms      

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void TIM2_IRQHandler(void)

{

  if(TIM_GetFlagStatus(TIM2, TIM_FLAG_Update) == SET)

  {

    if (tim_sensor0>0)

        tim_sensor0--;

    if (tim_sensor1>0)

        tim_sensor1--;

    if (tim_sensor2>0)

        tim_sensor2--;

    if (tim_sensor3>0)

        tim_sensor3--;

    if (tim_sensor4>0)

        tim_sensor4--;

    if (tim_sensor5>0)

        tim_sensor5--;

    TIM_ClearITPendingBit(TIM2, TIM_IT_Update);   // Clear UIF flag

  }

 

}

Posted on May 11, 2012 at 16:11

There are certainly more efficient ways to do the interrupt/count code, but I'm at a loss to how an RTOS would help here.

What speed is the processor running?

What is the frequency of the interrupts, and pulse widths?

If your rate is too high, you will saturate the processor.