Hi,
i am working with nRF52832, i need to us sleep.it may be do somthing and sleep 40ms,rtc wake up it and do somthing and cycle.
i see the rtc example but it may be some thing wrong.i do not have 32.768Khz crystal oscillator. do you have the same example?
the code
const nrf_drv_rtc_t rtc = NRF_DRV_RTC_INSTANCE(0); /**< Declaring an instance of nrf_drv_rtc for RTC0. */
static int mcuInSleep = 0;
/** @brief: Function for handling the RTC0 interrupts.
* Triggered on TICK and COMPARE0 match.
*/
static void rtc_handler(nrf_drv_rtc_int_type_t int_type)
{
if (int_type == NRF_DRV_RTC_INT_COMPARE0)
{
//nrf_gpio_pin_toggle(COMPARE_EVENT_OUTPUT);
}
else if (int_type == NRF_DRV_RTC_INT_TICK)
{
//nrf_gpio_pin_toggle(TICK_EVENT_OUTPUT);
mcuInSleep = false;
}
}
/** @brief Function configuring gpio for pin toggling.
*/
static void leds_config(void)
{
bsp_board_init(BSP_INIT_LEDS);
}
/** @brief Function starting the internal LFCLK XTAL oscillator.
*/
static void lfclk_config(void)
{
ret_code_t err_code = nrf_drv_clock_init();
APP_ERROR_CHECK(err_code);
nrf_drv_clock_lfclk_request(NULL);
}
/** @brief Function initialization and configuration of RTC driver instance.
*/
static void rtc_config(void)
{
uint32_t err_code;
//Initialize RTC instance
nrf_drv_rtc_config_t config = NRF_DRV_RTC_DEFAULT_CONFIG;
config.prescaler = 1309;
err_code = nrf_drv_rtc_init(&rtc, &config, rtc_handler);
APP_ERROR_CHECK(err_code);
//Enable tick event & interrupt
nrf_drv_rtc_tick_enable(&rtc,true);
//Set compare channel to trigger interrupt after COMPARE_COUNTERTIME seconds
//err_code = nrf_drv_rtc_cc_set(&rtc,0,COMPARE_COUNTERTIME * 8,true);
//APP_ERROR_CHECK(err_code);
//Power on RTC instance
nrf_drv_rtc_disable(&rtc);
}
/**
* @brief Function for application main entry.
*/
void rtc_uint(void)
{
nrf_drv_rtc_counter_clear(&rtc);
nrf_drv_rtc_disable(&rtc);
}
void rtc_enable(void)
{
nrf_drv_rtc_counter_clear(&rtc);
nrf_drv_rtc_enable(&rtc);
mcuInSleep = true;
}
int main(void)
{
lfclk_config();
rtc_config();
rtc_uint();
nrf_gpio_cfg_output(BUTTON1_PIN);
while (true)
{
//do something
rtc_enable();
while(mcuInSleep){
__WFE();__SEV();
__WFE();
}
nrf_gpio_pin_toggle(BUTTON1_PIN);
rtc_uint();
}
}
