nRF52810 Timer 2 not working

[parag]

Hello All , 

I want to use timer 2 of nRF52810..my code is not giving any error but timer is also not going to IRQ handler...but if i made the same changes for timer 0 it working..

sharing my code...what should be the issue?..

Thanks in Advance....

void timer2_init(void)

{
NRF_TIMER2->TASKS_STOP = 1; // Stop timer
NRF_TIMER2->MODE = TIMER_MODE_MODE_Timer; // taken from Nordic dev zone
NRF_TIMER2->BITMODE = (TIMER_BITMODE_BITMODE_16Bit << TIMER_BITMODE_BITMODE_Pos);
NRF_TIMER2->PRESCALER = 60 ;
NRF_TIMER2->TASKS_CLEAR = 1; // Clear timer
NRF_TIMER2->CC[1] = 30999; //842//421 ;
NRF_TIMER2->INTENSET = TIMER_INTENSET_COMPARE1_Enabled << TIMER_INTENSET_COMPARE1_Pos; // taken from Nordic dev zone
NRF_TIMER2->SHORTS = (TIMER_SHORTS_COMPARE1_CLEAR_Enabled << TIMER_SHORTS_COMPARE1_CLEAR_Pos);
NVIC_EnableIRQ(TIMER2_IRQn);
NRF_TIMER2->TASKS_START = 1; // Start TIMER STOP AS WE USE IT FOR SOFTWARE UART SO WE START IT WHEN REQUIRED
}

void nrfx_timer_2_irq_handler(void)
{
if (NRF_TIMER2->EVENTS_COMPARE[0] &&
NRF_TIMER2->INTENSET & TIMER_INTENSET_COMPARE1_Msk)
{

// clear compare register event
NRF_TIMER2->EVENTS_COMPARE[0] = 0;

// toggle pin
nrf_gpio_pin_toggle(PIN_OUT) ;
}

}

[Jørgen Holmefjord]

Hi,

Can you try renaming nrfx_timer_2_irq_handler() to TIMER2_IRQHandler()? This is the actual handler name that will be called by NVIC when an interrupt is detected for this peripheral. TIMER2_IRQHandler() should be redefined in nrfx, but this would at least remove one possible error-source.

Your configured PRESCALER is also not supported, this can only be set to [0..9].

Also note that you are mixing COMPARE1 and EVENTS_COMPARE[0] in your handler. I'm not sure if you have actually checked that the handler is not entered (for instance by debugging), or if you are just relaying on the event to toggle the LED. With this code, I would not expect the LED to toggle at all.

Best regards,
Jørgen

[parag]

can you please give me reference code...i just want to use timer 2 which goes to IRQ every 1 sec

[Jørgen Holmefjord]

Did you even try the suggestions I gave you?

I tested the following code on a nRF52832/nRF52 DK, and it works as expected, toggling LED every 1 second:

void timer2_init(void)

{
    NRF_TIMER2->TASKS_STOP = 1; // Stop timer
    NRF_TIMER2->MODE = TIMER_MODE_MODE_Timer; // taken from Nordic dev zone
    NRF_TIMER2->BITMODE = (TIMER_BITMODE_BITMODE_16Bit << TIMER_BITMODE_BITMODE_Pos);
    NRF_TIMER2->PRESCALER = 9 ;
    NRF_TIMER2->TASKS_CLEAR = 1; // Clear timer
    NRF_TIMER2->CC[1] = 31250; //842//421 ;
    NRF_TIMER2->INTENSET = TIMER_INTENSET_COMPARE1_Enabled << TIMER_INTENSET_COMPARE1_Pos; // taken from Nordic dev zone
    NRF_TIMER2->SHORTS = (TIMER_SHORTS_COMPARE1_CLEAR_Enabled << TIMER_SHORTS_COMPARE1_CLEAR_Pos);
    NVIC_EnableIRQ(TIMER2_IRQn);
    NRF_TIMER2->TASKS_START = 1; // Start TIMER STOP AS WE USE IT FOR SOFTWARE UART SO WE START IT WHEN REQUIRED
}

void nrfx_timer_2_irq_handler(void)
{
    if (NRF_TIMER2->EVENTS_COMPARE[1] &&
    NRF_TIMER2->INTENSET & TIMER_INTENSET_COMPARE1_Msk)
    {

    // clear compare register event
    NRF_TIMER2->EVENTS_COMPARE[1] = 0;

    // toggle pin
    nrf_gpio_pin_toggle(LED_1) ;
    }

}


/**
 * @brief Function for main application entry.
 */
int main(void)
{
    nrf_gpio_cfg_output(LED_1);
    nrf_gpio_pin_set(LED_1);

    timer2_init();

    while (1)
    {
        __WFI();
    }
}