/**@brief Function for handling the ADC interrupt.
*
* @details This function will fetch the conversion result from the ADC, convert the value into
* percentage and send it to peer.
*/
void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
{
if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
{
nrf_saadc_value_t adc_result;
uint16_t batt_lvl_in_milli_volts;
uint8_t percentage_batt_lvl;
uint32_t err_code;
adc_result = p_event->data.done.p_buffer[0];
err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer,1);
APP_ERROR_CHECK(err_code);
batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
DIODE_FWD_VOLT_DROP_MILLIVOLTS;
percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);
err_code = ble_bas_battery_level_update(&m_bas, percentage_batt_lvl);
if (
(err_code != NRF_SUCCESS)
&&
(err_code != NRF_ERROR_INVALID_STATE)
&&
(err_code != BLE_ERROR_NO_TX_PACKETS)
&&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}
}
}
/**@brief Function for handling the ADC interrupt.
*
* @details This function will fetch the conversion result from the ADC, convert the value into
* percentage and send it to peer.
*/
void ADC_IRQHandler(void)
{
if (nrf_adc_conversion_finished())
{
uint8_t adc_result;
uint16_t batt_lvl_in_milli_volts;
uint8_t percentage_batt_lvl;
uint32_t err_code;
nrf_adc_conversion_event_clean();
adc_result = nrf_adc_result_get();
batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
DIODE_FWD_VOLT_DROP_MILLIVOLTS;
percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);
err_code = ble_bas_battery_level_update(&m_bas, percentage_batt_lvl);
if (
(err_code != NRF_SUCCESS)
&&
(err_code != NRF_ERROR_INVALID_STATE)
&&
(err_code != BLE_ERROR_NO_TX_BUFFERS)
&&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}
}
}
/**@brief Function for handling the ADC interrupt.
*
* @details This function will fetch the conversion result from the ADC, convert the value into
* percentage and send it to peer.
*/
void ADC_IRQHandler(void)
{
uint32_t err_code;
uint16_t adc_value;
uint8_t percentage_batt_lvl;
uint16_t batt_lvl_in_milli_volts;
nrf_adc_conversion_event_clean();
nrf_adc_stop();
adc_value = nrf_adc_result_get();
batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_value);
percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);
err_code = ble_bas_battery_level_update(&m_bas, percentage_batt_lvl);
if (
(err_code != NRF_SUCCESS)
&&
(err_code != NRF_ERROR_INVALID_STATE)
&&
(err_code != BLE_ERROR_NO_TX_PACKETS)
&&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}
}
/**@brief Function for handling the ADC interrupt.
* @details This function will fetch the conversion result from the ADC, convert the value into
* percentage and send it to peer.
*/
void ADC_IRQHandler(void)
{
if (NRF_ADC->EVENTS_END != 0)
{
uint8_t adc_result;
uint16_t batt_lvl_in_milli_volts;
uint8_t percentage_batt_lvl;
uint32_t err_code;
NRF_ADC->EVENTS_END = 0;
adc_result = NRF_ADC->RESULT;
NRF_ADC->TASKS_STOP = 1;
batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
DIODE_FWD_VOLT_DROP_MILLIVOLTS;
percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);
err_code = ble_bas_battery_level_update(&bas, percentage_batt_lvl);
if (
(err_code != NRF_SUCCESS)
&&
(err_code != NRF_ERROR_INVALID_STATE)
&&
(err_code != BLE_ERROR_NO_TX_BUFFERS)
&&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}
}
}
/**
* @brief ADC interrupt handler.
*/
static void adc_event_handler(nrf_drv_adc_evt_t const * p_event)
{
uint32_t err_code;
uint16_t adc_sum_value = 0;
uint16_t adc_average_value;
uint16_t adc_result_millivolts;
uint8_t adc_result_percent;
sd_clock_hfclk_release(); //Release the external crystal
adc_event_counter++;
NRF_LOG_INFO(" ADC event counter: %d\r\n", adc_event_counter);
if (p_event->type == NRF_DRV_ADC_EVT_DONE)
{
uint32_t i;
for (i = 0; i < p_event->data.done.size; i++)
{
NRF_LOG_INFO("Sample value %d: %d\r\n", i+1, p_event->data.done.p_buffer[i]);
adc_sum_value += p_event->data.done.p_buffer[i]; //Sum all values in ADC buffer
}
adc_average_value = adc_sum_value / p_event->data.done.size; //Calculate average value from all samples in the ADC buffer
NRF_LOG_INFO("Average ADC value: %d\r\n", adc_average_value);
adc_result_millivolts = ADC_RESULT_IN_MILLI_VOLTS(adc_average_value); //Transform the average ADC value into millivolts value
NRF_LOG_INFO("ADC result in millivolts: %d\r\n", adc_result_millivolts);
adc_result_percent = battery_level_in_percent(adc_result_millivolts); //Transform the millivolts value into battery level percent.
NRF_LOG_INFO("ADC result in percent: %d\r\n", adc_result_percent);
//Send the battery level over BLE
err_code = ble_bas_battery_level_update(&m_bas, adc_result_percent); //Send the battery level over BLE
if ((err_code != NRF_SUCCESS) &&
(err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != BLE_ERROR_NO_TX_PACKETS) &&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING))
{
APP_ERROR_HANDLER(err_code); //Assert on error
}
}
}
static uint16_t
adc_read_blocking()
{
while (NRF_ADC->BUSY == 1) {
// __asm("nop");
}
NRF_ADC->EVENTS_END = 0;
sd_nvic_DisableIRQ(ADC_IRQn);
NRF_ADC->INTENCLR = ADC_INTENCLR_END_Enabled;
NRF_ADC->TASKS_START = 1;
adc_config();
NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled;
while (NRF_ADC->EVENTS_END == 0) {
// __asm("nop");
}
uint16_t batt_lvl_in_milli_volts;
uint16_t result = NRF_ADC->RESULT;
batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(result);
result = battery_level_in_percent(batt_lvl_in_milli_volts);
NRF_ADC->EVENTS_END = 0;
NRF_ADC->TASKS_STOP = 1;
return result;
}
/**@brief Function for getting battery level using ADC.
* @details This function also converts adc register value to percentage level.
*
* @param[out] bl Battery level in percentage.
*
* @retval NRF_SUCCES is measurement were properly taken, NRF_ERROR_BUSY otherwise.
*/
uint32_t take_battery_level(uint8_t * bl)
{
uint32_t err_code = NRF_ERROR_BUSY;
if (NRF_ADC->EVENTS_END != 0)
{
uint8_t adc_result;
uint16_t batt_lvl_in_milli_volts;
NRF_ADC->EVENTS_END = 0;
adc_result = NRF_ADC->RESULT;
NRF_ADC->TASKS_STOP = 1;
batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
DIODE_FWD_VOLT_DROP_MILLIVOLTS;
*bl = battery_level_in_percent(batt_lvl_in_milli_volts);
NRF_ADC->TASKS_START = 1;
err_code = NRF_SUCCESS;
}
return err_code;
}
