.. zephyr:board:: slwrb4250b Overview ******** The EFR32FG1 Flex Gecko 2.4 GHz and 868 MHz Radio Board is delivered as part of `SLWSTK6061B Proprietary Wireless Starter Kit`_. It contains a EFR32FG1 Wireless SoC built on an ARM Cortex®-M4F processor with excellent low power capabilities. The BRD4250B a.k.a. SLWRB4250B radio board plugs into the Wireless Starter Kit Mainboard BRD4001A and is supported as one of :ref:`silabs_radio_boards`. Hardware ******** - EFR32FG1P133F256GM48 Flex Gecko SoC - CPU core: ARM Cortex®-M4 with FPU - Flash memory: 256 kB - RAM: 32 kB - Transmit power: up to +13 dBm - Operation frequency: 2.4 GHz, 868 MHz - 8Mbit SPI NOR Flash - Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz). For more information about the EFR32FG1 SoC and BRD4250B board, refer to these documents: - `EFR32FG1 Website`_ - `EFR32FG1 Datasheet`_ - `EFR32xG1 Reference Manual`_ - `SLWSTK6061B Proprietary Wireless Starter Kit`_ - `BRD4250B User Guide`_ - `BRD4250B Reference Manual`_ - `EFR32FG1-BRD4250B Schematics`_ Supported Features ================== The board configuration supports the following hardware features: +-----------+------------+-------------------------------------+ | Interface | Controller | Driver/Component | +===========+============+=====================================+ | MPU | on-chip | memory protection unit | +-----------+------------+-------------------------------------+ | NVIC | on-chip | nested vector interrupt controller | +-----------+------------+-------------------------------------+ | SYSTICK | on-chip | systick | +-----------+------------+-------------------------------------+ | COUNTER | on-chip | rtcc | +-----------+------------+-------------------------------------+ | FLASH | on-chip | flash memory | +-----------+------------+-------------------------------------+ | GPIO | on-chip | gpio | +-----------+------------+-------------------------------------+ | UART | on-chip | serial port-polling; | | | | serial port-interrupt | +-----------+------------+-------------------------------------+ | SPI(M) | on-chip | spi port-polling | +-----------+------------+-------------------------------------+ | WATCHDOG | on-chip | watchdog | +-----------+------------+-------------------------------------+ The default configuration can be found in :zephyr_file:`boards/silabs/radio_boards/slwrb4250b/slwrb4250b_defconfig` Connections and IOs =================== In the following table, the column **Pin** contains Pin names. For example, PA2 means Pin number 2 on PORTA, as used in the board's datasheets and manuals. +-------+-------------+-------------------------------------+ | Pin | Function | Usage | +=======+=============+=====================================+ | PF4 | GPIO | LED0 | +-------+-------------+-------------------------------------+ | PF5 | GPIO | LED1 | +-------+-------------+-------------------------------------+ | PF6 | GPIO | Push Button PB0 | +-------+-------------+-------------------------------------+ | PF7 | GPIO | Push Button PB1 | +-------+-------------+-------------------------------------+ | PA5 | GPIO | Board Controller Enable VCOM_ENABLE | +-------+-------------+-------------------------------------+ | PA0 | USART0_TX | UART Console VCOM_TX US0_TX #0 | +-------+-------------+-------------------------------------+ | PA1 | USART0_RX | UART Console VCOM_RX US0_RX #0 | +-------+-------------+-------------------------------------+ | PC6 | SPI_MOSI | Flash MOSI US1_TX #11 | +-------+-------------+-------------------------------------+ | PC7 | SPI_MISO | Flash MISO US1_RX #11 | +-------+-------------+-------------------------------------+ | PC8 | SPI_SCLK | Flash SCLK US1_CLK #11 | +-------+-------------+-------------------------------------+ | PA4 | SPI_CS | Flash Chip Select (GPIO) | +-------+-------------+-------------------------------------+ System Clock ============ The EFR32FG1P SoC is configured to use the 38.4 MHz external oscillator on the board. Serial Port =========== The EFR32FG1P SoC has two USARTs and one Low Energy UARTs (LEUART). USART0 is connected to the board controller and is used for the console. Programming and Debugging ************************* Flashing ======== Connect the BRD4001A board with a mounted BRD4250B radio module to your host computer using the USB port. Here is an example for the :zephyr:code-sample:`hello_world` application. .. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: slwrb4250b :goals: flash Open a serial terminal (minicom, putty, etc.) with the following settings: - Speed: 115200 - Data: 8 bits - Parity: None - Stop bits: 1 Reset the board and you should see the following message in the terminal: .. code-block:: console Hello World! slwrb4250b .. _EFR32FG1 Website: https://www.silabs.com/wireless/proprietary/efr32fg1-series-1-sub-ghz-2-4-ghz-socs .. _EFR32FG1 Datasheet: https://www.silabs.com/documents/public/data-sheets/efr32fg1-datasheet.pdf .. _EFR32xG1 Reference Manual: https://www.silabs.com/documents/public/reference-manuals/efr32xg1-rm.pdf .. _SLWSTK6061B Proprietary Wireless Starter Kit: https://www.silabs.com/products/development-tools/wireless/proprietary/slwstk6061b-efr32-flex-gecko-868-mhz-2-4-ghz-and-sub-ghz-starter-kit .. _BRD4250B User Guide: https://www.silabs.com/documents/public/user-guides/ug182-brd4250b-user-guide.pdf .. _BRD4250B Reference Manual: https://www.silabs.com/documents/public/reference-manuals/brd4250b-rm.pdf .. _EFR32FG1-BRD4250B Schematics: https://www.silabs.com/documents/public/schematic-files/BRD4250B-B02-schematic.pdf