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

- b -

b : color_rgb_t
b1 : bmp180_calibration_t
b16 : be_uint32_t, be_uint64_t
b2 : bmp180_calibration_t
b32 : be_uint64_t
b_pin : ltdc_conf_t, qdec_conf_t
b_used : md5_ctx_t
backend_ctx : psa_cipher_operation_s
backoff_budget : gnrc_lorawan_mlme_t
backoff_delay : kw41zrf_t
backoff_mask : ieee802154_submac
backoff_period : csma_sender_conf_t
backoff_phase_us : gomach
backoff_state : gnrc_lorawan_mlme_t
backoff_timer : gnrc_netif_lorawan_t
bandwidth : sx127x_lora_settings_t
bank : fmc_bank_conf_t, lcd_fmc_desc_t, mtd_jedec_id_t
banks : sam0_common_usb_t
base : evtimer_t, msp430_port_p1_p2_t, msp430_port_p3_p6_t, mtd_at24cxxx_t, mtd_at25xxx_t, mtd_emulated_t, mtd_flashpage_t, mtd_native_dev, mtd_sam0_sdhc_t, mtd_sdcard_t, mtd_sdmmc_t, mtd_spi_nor_t, pio_program_i2c, sixlowpan_sfr_ack_t, sixlowpan_sfr_rfrag_t, sock_ip, sock_tcp, sock_tcp_queue, sock_udp, wifi_connect_request, wifi_connect_result, wifi_disconnect_request, wifi_disconnect_result, wifi_scan_request, wifi_scan_result, ztimer64_t, ztimer_t
base_addr : littlefs2_desc_t, littlefs_desc_t, spiffs_desc, stm32_usbdev_fs_config_t
base_clock : ztimer64_clock
base_freq : cc110x_config_t
base_name : senml_attr_t
base_sum : senml_attr_t
base_time : senml_attr_t
base_timer : ztimer64_clock
base_unit : senml_attr_t
base_value : senml_attr_t
base_version : senml_attr_t
basic_state : gomach
bat : bq2429x_fault_t
BATMONBAT : aux_sysif_regs_t
BATMONTEMP : aux_sysif_regs_t
baud : usb_req_cdcacm_coding_t
baudrate : at_dev_init_t, dose_params_t, ethos_params_t, hal_spi_settings, rn2xx3_params_t, slipdev_params_t, uart_half_duplex_params_t
BBC : at86rf215
bcast : xbee_l2hdr_t
bcd_cdc : usb_desc_cdc_t
bcd_device : usb_descriptor_device_t
bcd_dfu : usb_desc_if_dfu_t
bcd_hid : usb_desc_hid_t
bcd_usb : usb_descriptor_device_t
bcnth : ctap_hid_init_pkt_t
bcntl : ctap_hid_init_pkt_t
bdev : lwext4_desc_t
BDU : LIS2DH12_CTRL_REG4_t
be : ieee802154_submac
BEIM : cc2538_uart_t
BEMIS : cc2538_uart_t
bhp : bhp_event_t, bhp_msg_t
bit : LIS2DH12_ACT_THS_t, LIS2DH12_CLICK_CFG_t, LIS2DH12_CLICK_SRC_t, LIS2DH12_CLICK_THS_t, LIS2DH12_CTRL_REG0_t, LIS2DH12_CTRL_REG1_t, LIS2DH12_CTRL_REG2_t, LIS2DH12_CTRL_REG3_t, LIS2DH12_CTRL_REG4_t, LIS2DH12_CTRL_REG5_t, LIS2DH12_CTRL_REG6_t, LIS2DH12_FIFO_CTRL_REG_t, LIS2DH12_FIFO_SRC_REG_t, LIS2DH12_INT1_CFG_t, LIS2DH12_INT1_DURATION_t, LIS2DH12_INT1_THS_t, LIS2DH12_INT2_CFG_t, LIS2DH12_INT2_DURATION_t, LIS2DH12_INT2_THS_t, LIS2DH12_TEMP_CFG_REG_t, LIS2DH12_TIME_LIMIT_t
bit_mode : aip31068_params_t
bitCounter : dcf77
bitmode : timer_conf_t
bitrate : can_bittiming, can_conf_t
bits : adcxx1c_params, dcf77_bits_t, gpio_conf_esp32, gpio_conf_gd32v, gpio_conf_minimal, gpio_conf_nrf5x, gpio_conf_sam0, gpio_conf_stm32, psa_key_attributes_s
bitseq : dcf77
bittiming : candev
BL_CONFIG : ccfg_regs_t
BLE : LIS2DH12_CTRL_REG4_t
blk_addr : msc_cbw_rw10_pkt_t
blk_len : msc_read_capa_pkt_t, msc_read_fmt_capa_pkt_t
blk_nb : msc_read_fmt_capa_pkt_t
blknum : coap_block1_t, coap_block_request_t
blksize : coap_block_request_t
block : md5_ctx_t, usbus_msc_device
block_count : spiffs_desc
block_desc_len : msc_mode_parameter_pkt_t
block_erase_32k : mtd_spi_nor_opcode_t
block_erase_64k : mtd_spi_nor_opcode_t
BLOCK_LEN_ERROR : sdmmc_card_status_t
block_nb : usbus_msc_device, usbus_msc_lun
block_num : sdmmc_xfer_desc_t
block_offset : usbus_msc_device
block_pm_mode : ztimer64_clock, ztimer_clock
block_size : cipher_interface_st, sdmmc_xfer_desc_t, usbus_msc_lun
blockers : WORD_ALIGNED
blue : apds99xx_rgb_t, isl29125_rgb_t, tcs37727_data_t
bod12_calibration : sam0_aux_cfg_mapping
bod33_action : sam0_aux_cfg_mapping
bod33_disable : sam0_aux_cfg_mapping
bod33_enable : sam0_aux_cfg_mapping
bod33_hysteresis : sam0_aux_cfg_mapping
bod33_level : sam0_aux_cfg_mapping
BOOT : LIS2DH12_CTRL_REG5_t
bootloader_size : sam0_aux_cfg_mapping
bootstrap_account_timeout : lwm2m_obj_security_args
bound : conn_can_isotp_master, conn_can_isotp_slave
BOUNDARY : flash_regs_t
br : xbee_params_t
br0 : msp430_usart_prescaler_t
BR0 : msp430_usart_t, msp430_usci_a_t, msp430_usci_b_t
br0 : msp430_usci_prescaler_t
br1 : msp430_usart_prescaler_t
BR1 : msp430_usart_t, msp430_usci_a_t, msp430_usci_b_t
br1 : msp430_usci_prescaler_t
braddr : sixlowpan_nd_opt_abr_t
brightness : dsp0401_params_t
BRK : cc2538_uart_t
brp : can_bittiming
brp_inc : can_bittiming_const
brp_max : can_bittiming_const
brp_min : can_bittiming_const
bs : isotp_fc_options, tpcon
bsp_irq_enabled : atwinc15x0
bsp_isr : atwinc15x0
bssid : wifi_scan_result
buf : bluetil_ad_t, cc110x_t, circ_buf_t, ctap_req_t, dfplayer, kw2xrf_t, ringbuffer_t, serial_msg_t, sha2xx_context_t, sha512_common_context_t, suit_manifest_t, suit_transport_mock_payload_t, tsrb, usbdev_mock_ep_t, usbus_urb, ws281x_params_t
buf_charged : ltc4150_last_minute_data_t
buf_ctx : sock_dtls
buf_discharged : ltc4150_last_minute_data_t
buff : dcf77_bits_t::values
buffer : chunk_ringbuf_t, dynamixel_reader_t, dynamixel_writer_t, feetech_reader_t, feetech_writer_t, sha1_context, sock_dtls, uart_half_duplex_t, usbus_msc_device, vfs_DIR, vfs_file_t
buffer_addr : eth_dma_desc
buffer_end : chunk_ringbuf_t
buffer_max_size : feetech_writer_t, uart_half_duplex_t
buffer_offset : sha1_context
buffer_size : usbus_msc_device
build_version : ctap_hid_init_resp_t
burst_interleaved : fmc_sdram_bank_conf_t
burst_len : fmc_sdram_bank_conf_t
burst_read : fmc_sdram_bank_conf_t
burst_write : fmc_sdram_bank_conf_t
bus : ds3231_params_t, ds3231_t, fmc_conf_t, gnrc_netif_t, i2c_conf_t, lc709203f_params_t, lc709203f_t, ltdc_conf_t, pwm_conf_t, qdec_conf_t, timer_conf_t, uart_conf_t
bus_turnaround : fmc_nor_sram_timing_t
bus_width : sdhc_state_t, sdmmc_dev
BUS_WIDTH : sdmmc_ext_csd_t
BUSY : cc2538_uart_t
busy : gnrc_lorawan_t
busy_pin : dfplayer, dfplayer_params_t, epd_bw_spi_params_t, sx126x_params_t, sx1280_params_t
busy_value : epd_bw_spi_params_t
bw : loramac_channel_t
by_nack : gnrc_sixlowpan_frag_sfr_stats_t
by_timeout : gnrc_sixlowpan_frag_sfr_stats_t
byte_count : sha1_context