Simplest way to read an ADC input

Question

Dear All,
I would like a simple way to read the voltage on one ADC pin without using any "adc_event_handler"-like solution.
I tried 
 reading=nrf_adc_convert_single(NRF_ADC_CONFIG_INPUT_2); 
 but without success. 
 Thanks 
 Francesco

Sigurd · Accepted Answer

First of all, event-driven ADC is recommended, so that the CPU can be turned off during inactive periods. But if you don’t want that, here is a very simple way to read the ADC without using any events, using the nrf_drv_adc_sample_convert function : #include "nrf.h" #include #include #include #include "nrf_drv_adc.h" #include "nordic_common.h" #include "boards.h" #include "nrf_log.h" #include "app_error.h" #include "nrf_delay.h" #include "app_util_platform.h" static nrf_adc_value_t adc_value; /**< ADC buffer. */ static nrf_drv_adc_channel_t m_channel_config = NRF_DRV_ADC_DEFAULT_CHANNEL(NRF_ADC_CONFIG_INPUT_2); /** * @brief Function for main application entry. */ int main(void) { UNUSED_RETURN_VALUE(NRF_LOG_INIT()); NRF_LOG_PRINTF("ADC example "); while (true) { nrf_drv_adc_sample_convert(&m_channel_config,&adc_value); NRF_LOG_PRINTF("ADC buffer: %d ",adc_value); nrf_delay_ms(100); } } /** @} */

Simplest way to read an ADC input

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