Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

- u -

• u16 : be_uint16_t , be_uint32_t , be_uint64_t , ipv6_addr_t , le_uint16_t , le_uint32_t , le_uint64_t
• u32 : be_uint32_t , be_uint64_t , gnrc_sixlowpan_frag_sfr_bitmap_t , ipv4_addr_t , ipv6_addr_t , le_uint32_t , le_uint64_t , netdev_ble_ctx_t
• u64 : be_uint64_t , ipv6_addr_t , le_uint64_t
• u8 : be_uint16_t , be_uint32_t , be_uint64_t , dhcpv6_duid_t , ipv4_addr_t , ipv6_addr_t , le_uint16_t , le_uint32_t , le_uint64_t , skald_uuid_t
• uart : at_dev_init_t , at_dev_t , dfplayer , dfplayer_params_t , dose_params_t , dose_t , ethos_params_t , ethos_t , rn2xx3_params_t , sds011_params_t , slipdev_params_t , uart_conf_t , uart_half_duplex_params_t , xbee_params_t
• UART0 : cc2538_sys_ctrl_t
• UART1 : cc2538_sys_ctrl_t
• uart_octet : dose_t
• UARTCLKGDS : prcm_regs_t
• UARTCLKGR : prcm_regs_t
• UARTCLKGS : prcm_regs_t
• UARTEN : cc2538_uart_t
• udp : nanocoap_sock_t
• udp_sock : sock_dtls
• uhcp_magic : uhcp_hdr_t
• UHS_AU_SIZE : sd_status_t , sdmmc_sd_status_t
• UHS_SPEED_GRADE : sd_status_t , sdmmc_sd_status_t
• uid_byte : mfrc522_uid_t
• uint16 : eui64_t
• uint32 : eui64_t
• uint64 : eui64_t
• uint8 : eui48_t , eui64_t
• ulpi_af : dwc2_usb_otg_fshs_config_t
• ulpi_clk : dwc2_usb_otg_fshs_config_t
• ulpi_d0 : dwc2_usb_otg_fshs_config_t
• ulpi_d1 : dwc2_usb_otg_fshs_config_t
• ulpi_d2 : dwc2_usb_otg_fshs_config_t
• ulpi_d3 : dwc2_usb_otg_fshs_config_t
• ulpi_d4 : dwc2_usb_otg_fshs_config_t
• ulpi_d5 : dwc2_usb_otg_fshs_config_t
• ulpi_d6 : dwc2_usb_otg_fshs_config_t
• ulpi_d7 : dwc2_usb_otg_fshs_config_t
• ulpi_dir : dwc2_usb_otg_fshs_config_t
• ulpi_nxt : dwc2_usb_otg_fshs_config_t
• ulpi_stp : dwc2_usb_otg_fshs_config_t
• umount : vfs_file_system_ops
• UNDERRUN : sdmmc_card_status_t
• unique_lock() : riot::unique_lock< Mutex >
• unit : phydat_t , senml_attr_t
• units : lwm2m_obj_ipso_sensor_base_args , lwm2m_obj_ipso_sensor_base_inst
• units_len : lwm2m_obj_ipso_sensor_base_args
• unlink : vfs_file_system_ops
• unlock() : riot::mutex , riot::unique_lock< Mutex >
• unused : icmpv6_error_dst_unr_t , icmpv6_error_time_exc_t , l3gxxxx_int_data_src_t , l3gxxxx_int_event_src_t
• up : ctap_options_t , usb_desc_cdcecm_speed_t
• update_time : senml_attr_t
• updateVisual() : dsme::DSMEPlatform
• upins : ina3221_params_t
• urgent_ptr : tcp_hdr_t
• url : nanocoap_fs_t
• urlbuf : nanocoap_fs_dir_t , nanocoap_fs_file_t , nanocoap_fs_t , suit_manifest_t
• urlbuf_len : suit_manifest_t
• usage : psa_key_policy_s
• usart_params : msp430_usart_spi_params_t , msp430_usart_uart_params_t
• USB_IRQ_ACK : cc2538_gpio_t
• usbdev : nrfusb_t , sam0_common_usb_t , stm32_usbdev_fs_t , usbdev_mock
• usbus : usbus_cdcacm_device , usbus_cdcecm_device , usbus_dfu_device , usbus_hid_device , usbus_msc_device
• usci_params : msp430_usci_spi_params_t , msp430_usci_uart_params_t
• use_block_addr : sdcard_spi_t
• use_count : universal_address_container_t
• used : sock_tcp_queue , stm32_usbdev_fs_t , tlsf_size_container_t
• user : ctap_make_credential_req_t , wifi_security_wpa_enterprise
• user_cb : asymcute_con
• user_crc : sam0_aux_cfg_mapping
• user_ctx : nanocoap_fileserver_event_ctx_t
• user_id : ctap_resident_key
• USER_ID : fcfg_regs_t
• user_id_len : ctap_resident_key
• user_page : sam0_aux_cfg_mapping
• user_pages : sam0_aux_cfg_mapping
• user_ptr : u8x8_riotos_t , ucg_riotos_t
• user_row_write_enable : sam0_aux_cfg_mapping
• userinfo : uri_parser_result_t
• userinfo_len : uri_parser_result_t
• users : gnrc_pktsnip , ztimer_clock
• usual : gnrc_sixlowpan_frag_sfr_stats_t
• uv : ctap_options_t