Function esp_idf_sys::touch_pad_get_voltage

pub unsafe extern "C" fn touch_pad_get_voltage(
    refh: *mut touch_high_volt_t, 
    refl: *mut touch_low_volt_t, 
    atten: *mut touch_volt_atten_t
) -> esp_err_t

@brief Get touch sensor reference voltage, @param refh pointer to accept DREFH value @param refl pointer to accept DREFL value @param atten pointer to accept the attenuation on DREFH @return - ESP_OK on success