Troubleshooting ADC Configuration for Sensor Data Acquisition on AVR128DA48 with Zephyr OS

#include <zephyr.h>
#include <drivers/adc.h>

static const struct device *adc_dev;
static int16_t sample_buffer[1];

void adc_init() {
    adc_dev = device_get_binding("ADC_0");
    struct adc_channel_cfg channel_cfg = {
        .gain = ADC_GAIN_1,
        .reference = ADC_REF_INTERNAL,
        .acquisition_time = ADC_ACQ_TIME_DEFAULT,
        .channel_id = 1,
    };
    adc_channel_setup(adc_dev, &channel_cfg);
}

void read_adc() {
    struct adc_sequence sequence = {
        .channels = BIT(1),
        .buffer = sample_buffer,
        .buffer_size = sizeof(sample_buffer),
        .resolution = 10,
    };
    adc_read(adc_dev, &sequence);
}