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Asked: July 27, 20222022-07-27T16:11:22+05:30 2022-07-27T16:11:22+05:30In: Microcontroller

Why RA6M2 Take Accurate Second Timekeeper

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I am using FreeRTOS on the RA6M2, and what I need is a fairly accurate detention that works in the range of 1- 64 forevers. The software detention is way out in this range( 60us software detention turned out to be 84us), indeed when using critical task section and disabling irqs.

I have tried rather using a tackle timekeeper like below

This will not be veritably accurate but I was hoping the outflow would be small enough that I could ignore it. still, when I try this, the do while noway exits. For some reason the timekeeper counter keeps resetting indeed though this is a one shot timekeeper. Can someone tell me where I am going wrong with this? I am using the configurator in the e2Studio IDE to set up the timekeeper.

Any results to this problem will be appreciated.

e2studiora6m2timer
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    1. vikas Nagpal
      2022-08-02T10:32:38+05:30Added an answer on August 2, 2022 at 10:32 am

       You need to create the callback in the FSP configurator first, then inside your code create its implementation like this: volatile uint8_t timer_done; ....................... /* Example callback called when timer expires. */ void timer_callback (timer_callback_args_t * p_args) {   if (TIMER_EVENT_CRead more

       You need to create the callback in the FSP configurator first, then inside your code create its implementation like this:

      volatile uint8_t timer_done;
      .......................
      /* Example callback called when timer expires. */
      void timer_callback (timer_callback_args_t * p_args)
      {
        if (TIMER_EVENT_CYCLE_END == p_args->event)
        {
          timer_done = 1;
        }
      }
      ............................
      set_output(OUTPUT1, IO_HIGH);
      timer_done = 0;
      R_GPT_Start(&g_timer0_ctrl);
      while (!timer_done);
      R_GPT_Reset(&g_timer0_ctrl);
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