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

- o -

• obj_security : lwm2m_client_data_t
• observer : gcoap_observe_memo_t
• occupied : stm32_usb_otg_fshs_t , suit_storage_ram_region_t , usbus_cdcacm_device
• ocp : gnrc_rpl_of_t , gnrc_rpl_opt_dodag_conf_t
• OCR : mega_timer_t , mini_timer_t
• OD : msp_port_isr_t , msp_port_t
• odr : lis3dh_params_t , lis3mdl_params_t , qmc5883l_params_t
• oe_pin : pca9685_params_t
• OEIM : cc2538_uart_t
• OEMIS : cc2538_uart_t
• off : ieee802154_radio_ops
• off_ctl : tcp_hdr_t
• offset : adxl345_params_t , coap_block1_t , coap_optpos_t , evtimer_event , gnrc_ipv6_ext_frag_send_t , gnrc_sixlowpan_frag_fb_t , mag3110_params_t , mma8x5x_params_t , riotboot_flashwrite_t , sixlowpan_frag_n_t , sixlowpan_sfr_rfrag_t , suit_param_ref_t , xtimer , ztimer_base
• offset_flags : ipv6_ext_frag_t
• OID : cid_t
• op_mode : hmc5883l_params_t , hmc5883l_t , lis3mdl_params_t
• opcode : mtd_spi_nor_params_t
• open : vfs_file_ops
• open_files : vfs_mount_struct
• opendir : vfs_dir_ops
• operator bool() : riot::unique_lock< Mutex >
• operator!=() : riot::thread_id
• operator()() : riot::thread_data_deleter
• operator+=() : riot::time_point
• operator<() : riot::thread_id
• operator<< : riot::thread_id
• operator<=() : riot::thread_id
• operator=() : riot::thread , riot::unique_lock< Mutex >
• operator==() : riot::thread_id
• operator>() : riot::thread_id
• operator>=() : riot::thread_id
• OPMODEACK : aux_sysif_regs_t
• OPMODEREQ : aux_sysif_regs_t
• ops : gnrc_netif_t , ztimer_clock
• opt : can_opt_t , coap_block_slicer_t , ds3231_params_t , gnrc_netapi_opt_t , isotp
• opt_codes : dhcpv6_opt_oro_t
• opt_num : coap_optpos_t
• options : cc2420_t , coap_pkt_t , xbee_t
• options_len : coap_pkt_t
• opts : dhcpv6_opt_ia_pd_t , dhcpv6_opt_iapfx_t , dose_t
• origin : ntp_packet_t
• OSC : cc2538_sys_ctrl_t
• OSC32K : cc2538_sys_ctrl_t
• OSC32K_CADIS : cc2538_sys_ctrl_t
• OSC32K_CALDIS : cc2538_sys_ctrl_t
• OSC_CONF : fcfg_regs_t
• OSC_PD : cc2538_sys_ctrl_t
• OSCCFG : aon_pmctl_regs_t , aon_wuc_regs_t
• OSCICR : prcm_regs_t
• OSCIMSC : prcm_regs_t
• OSCRIS : prcm_regs_t
• osr : qmc5883l_params_t
• otaa : gnrc_netif_lorawan_t
• out : stm32_usb_otg_fshs_t , usbdev_mock , usbus_control_handler_t
• out_drv : pca9685_params_t
• out_lock : usbus_cdcecm_device
• out_mode : ds18_params_t
• out_mutex : ethos_t
• out_ne : pca9685_params_t
• out_netif : gnrc_sixlowpan_frag_vrb_t
• out_tag : gnrc_sixlowpan_frag_vrb_t
• OVER : cc2538_ioc_t
• oversampling : bmp180_params_t
• owner : rmutex_t
• owns_lock() : riot::unique_lock< Mutex >