• State Not Answered
  • Locked Locked
  • Replies 7 replies
  • Subscribers 21 subscribers
  • Views 1572 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Output compare interrupt

Peter Row

i would like to use the output compare 1 Interrupt. What do I have to add (or remove) to following code, so that it works?

   TIM_InitStructure.TIM_Mode = TIM_OCM_CHANNEL_1;
   TIM_InitStructure.TIM_OC1_Modes = TIM_TIMING;
   TIM_InitStructure.TIM_Clock_Source =TIM_CLK_EXTERNAL;
   TIM_InitStructure.TIM_Pulse_Length_1 = 25000;

   TIM_Init (TIM1, &TIM_InitStructure);
   TIM_CounterCmd(TIM1, TIM_START);

   VIC0->VAiR[5]   = (unsigned int)TIM1_IRQ_Handler;

kind regards
don

Parents Reply Children
  • 0 in reply to Peter Row

    Well, as I just got done saying to another poster here:

    The ARM is merely the processor core around which manufacturers connect their own memory and peripheral subsystems.

    In other words timer subsystems by Atmel, NXP, ADI, Freescale, STM, etc. are not created equal.

    What are you using? We're not mind readers!

  • 0 in reply to Dan Henry

    I'm using the STR912F on the MCBSTR9U Board.

    What else do you need to know?

    don

  • 0 in reply to Peter Row

    "What else do you need to know?"

    What you are trying to achieve and what doesn't work.

  • 0 in reply to Dan Henry

    I'm trying to set up the timer so that it compares the freerunning counter with the compare register and when those registers match, then it should jump into the Interrupt Handler subroutine, or at least set the interrupt flag, for which I can poll.

    Actually I do this, like discribed in the ref-manual, but obviously the interrupt Flag is never set!

    To use the output compare function, select the following in the TIM_CR1 and TIM_CR2 registers:

    1) Set the OCiE bit if an output is needed then the OCMPi pin is dedicated to the output compare i function.
    2) Select the timer clock ECKEN and program the prescaler (CC[7:0]).
    3) Select the OLVLi bit to applied to the OCMPi pins after the match occurs. (I don't need this)
    4) Set the OCiIE bit to generate an interrupt if required.

    I do this with following code:

       TIM1->CR1 &= 0xFFBF;          //OCMP1 = 0
   TIM1->CR1 != 0x0001;              //ECKEN = 1
   TIM1->CR1 &= 0xFDFF;          //OLVL1 = 0
   TIM1->CR2 != 0x4000;              //OC1IE = 1