ret_code_t nrf_drv_csense_sample(void)
{
ASSERT(m_csense.module_state == NRF_DRV_STATE_POWERED_ON);
if(m_csense.adc_channels_input_mask != 0)
{
if(m_csense.channels_to_read == 0)
{
#if USE_COMP == 0 && defined(SAADC_PRESENT)
nrf_saadc_enable();
#endif
if(nrf_drv_csense_is_busy() == true)
{
return NRF_ERROR_BUSY;
}
m_csense.busy = true;
m_csense.channels_to_read = m_csense.adc_channels_input_mask;
calculate_next_channel();
}
#if USE_COMP
if (!m_csense.timers_powered_on)
{
nrf_drv_timer_enable(&m_timer0);
nrf_drv_timer_enable(&m_timer1);
m_csense.timers_powered_on = true;
}
else
{
nrf_drv_timer_resume(&m_timer0);
nrf_drv_timer_resume(&m_timer1);
}
nrf_drv_comp_pin_select((nrf_comp_input_t)m_csense.cur_chann_idx);
nrf_drv_comp_start(0, 0);
#else
ret_code_t err_code;
#ifdef ADC_PRESENT
adc_channel.config.config.ain = (nrf_adc_config_input_t)(1<<m_csense.cur_chann_idx);
nrf_gpio_pin_clear(m_csense.output_pin);
err_code = nrf_drv_adc_sample_convert(&adc_channel, NULL);
#elif defined(SAADC_PRESENT)
saadc_channel.pin_p = (nrf_saadc_input_t)(m_csense.cur_chann_idx + 1);
nrf_saadc_channel_input_set(0, saadc_channel.pin_p, NRF_SAADC_INPUT_DISABLED);
nrf_gpio_pin_clear(m_csense.output_pin);
err_code = nrf_drv_saadc_sample();
#endif //ADC_PRESENT
if(err_code != NRF_SUCCESS)
{
return err_code;
}
#endif //USE_COMP
}
return NRF_SUCCESS;
}
/**@brief Function for handling the Battery measurement timer timeout.
*
* @details This function will be called each time the battery level measurement timer expires.
* This function will start the ADC.
*
* @param[in] p_context Pointer used for passing some arbitrary information (context) from the
* app_start_timer() call to the timeout handler.
*/
static void battery_level_meas_timeout_handler(void * p_context)
{
UNUSED_PARAMETER(p_context);
#ifdef NRF51
nrf_adc_start();
#else // NRF52
uint32_t err_code;
err_code = nrf_drv_saadc_sample();
APP_ERROR_CHECK(err_code);
#endif // NRF51
}
static void rtc_handler(nrf_drv_rtc_int_type_t int_type)
{
uint32_t err_code;
if (int_type == NRF_DRV_RTC_INT_COMPARE0)
{
nrf_drv_saadc_sample(); //Trigger the SAADC SAMPLE task
LEDS_INVERT(BSP_LED_0_MASK); //Toggle LED1 to indicate SAADC sampling start
err_code = nrf_drv_rtc_cc_set(&rtc,0,RTC_CC_VALUE,true); //Set RTC compare value. This needs to be done every time as the nrf_drv_rtc clears the compare register on every compare match
APP_ERROR_CHECK(err_code);
nrf_drv_rtc_counter_clear(&rtc); //Clear the RTC counter to start count from zero
}
}