Function esp_idf_sys::adc_gpio_init

pub unsafe extern "C" fn adc_gpio_init(
    adc_unit: adc_unit_t, 
    channel: adc_channel_t
) -> esp_err_t

@brief Initialize ADC pad @param adc_unit ADC unit index @param channel ADC channel index @return - ESP_OK success - ESP_ERR_INVALID_ARG Parameter error