hi
I configured the battery voltage detection using an event of lpcom, and after the event, lpcomp is converted to ADC to measure the voltage.
( lpcomp -> adc -> lpcom )
I configured the code as shown below and tested it, and it works well. Please review to see if there are any problems.
adc()
{
nrf_drv_lpcomp_disable();
BatVoltage()
nrf_drv_lpcomp_enable();
}
int32_t BatVoltage( void )
{
int32_t BAT_output = 0;
uint8_t channel = 0;
nrf_saadc_value_t buf_adc;
nrf_saadc_channel_config_t aread = {
.resistor_p = NRF_SAADC_RESISTOR_DISABLED,
.resistor_n = NRF_SAADC_RESISTOR_DISABLED,
.gain = NRF_SAADC_GAIN1_6,
.reference = NRF_SAADC_REFERENCE_INTERNAL,
.acq_time = NRF_SAADC_ACQTIME_40US,
.mode = NRF_SAADC_MODE_SINGLE_ENDED,
.burst = NRF_SAADC_BURST_DISABLED, ///< Burst mode configuration.
.pin_p = NRF_SAADC_INPUT_AIN2,
.pin_n = NRF_SAADC_INPUT_DISABLED
};
nrf_saadc_channel_init( channel, &aread );
nrf_saadc_resolution_set(SAADC_RESOLUTION_VAL_10bit);
memset( &buf_adc, 0, sizeof(buf_adc) );
nrf_saadc_buffer_init( &buf_adc, 1 );
nrf_saadc_oversample_set( NRF_SAADC_OVERSAMPLE_DISABLED );
nrf_saadc_continuous_mode_disable();
nrf_saadc_enable();
while( !nrf_saadc_enable_check() ){}
nrf_saadc_task_trigger( NRF_SAADC_TASK_START );
while( !nrf_saadc_event_check( NRF_SAADC_EVENT_STARTED ) ) {}
nrf_saadc_event_clear( NRF_SAADC_EVENT_STARTED );
nrf_saadc_task_trigger( NRF_SAADC_TASK_SAMPLE );
while( !nrf_saadc_event_check( NRF_SAADC_EVENT_RESULTDONE ) ) {}
nrf_saadc_event_clear( NRF_SAADC_EVENT_RESULTDONE );
nrf_saadc_task_trigger( NRF_SAADC_TASK_STOP );
while( !nrf_saadc_event_check( NRF_SAADC_EVENT_STOPPED ) ) {}
nrf_saadc_event_clear( NRF_SAADC_EVENT_STOPPED );
return buf_adc;
}
thank
