1.. zephyr:board:: slwrb4250b
2
3Overview
4********
5
6The EFR32FG1 Flex Gecko 2.4 GHz and 868 MHz Radio Board is delivered as part of
7`SLWSTK6061B Proprietary Wireless Starter Kit`_. It contains a EFR32FG1 Wireless
8SoC built on an ARM Cortex®-M4F processor with excellent low power capabilities.
9
10The BRD4250B a.k.a. SLWRB4250B radio board plugs into the Wireless Starter Kit
11Mainboard BRD4001A and is supported as one of :ref:`silabs_radio_boards`.
12
13Hardware
14********
15
16- EFR32FG1P133F256GM48 Flex Gecko SoC
17- CPU core: ARM Cortex®-M4 with FPU
18- Flash memory: 256 kB
19- RAM: 32 kB
20- Transmit power: up to +13 dBm
21- Operation frequency: 2.4 GHz, 868 MHz
22- 8Mbit SPI NOR Flash
23- Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz).
24
25For more information about the EFR32FG1 SoC and BRD4250B board, refer to these
26documents:
27
28- `EFR32FG1 Website`_
29- `EFR32FG1 Datasheet`_
30- `EFR32xG1 Reference Manual`_
31- `SLWSTK6061B Proprietary Wireless Starter Kit`_
32- `BRD4250B User Guide`_
33- `BRD4250B Reference Manual`_
34- `EFR32FG1-BRD4250B Schematics`_
35
36Supported Features
37==================
38
39The board configuration supports the following hardware features:
40
41+-----------+------------+-------------------------------------+
42| Interface | Controller | Driver/Component                    |
43+===========+============+=====================================+
44| MPU       | on-chip    | memory protection unit              |
45+-----------+------------+-------------------------------------+
46| NVIC      | on-chip    | nested vector interrupt controller  |
47+-----------+------------+-------------------------------------+
48| SYSTICK   | on-chip    | systick                             |
49+-----------+------------+-------------------------------------+
50| COUNTER   | on-chip    | rtcc                                |
51+-----------+------------+-------------------------------------+
52| FLASH     | on-chip    | flash memory                        |
53+-----------+------------+-------------------------------------+
54| GPIO      | on-chip    | gpio                                |
55+-----------+------------+-------------------------------------+
56| UART      | on-chip    | serial port-polling;                |
57|           |            | serial port-interrupt               |
58+-----------+------------+-------------------------------------+
59| SPI(M)    | on-chip    | spi port-polling                    |
60+-----------+------------+-------------------------------------+
61| WATCHDOG  | on-chip    | watchdog                            |
62+-----------+------------+-------------------------------------+
63
64The default configuration can be found in
65:zephyr_file:`boards/silabs/radio_boards/slwrb4250b/slwrb4250b_defconfig`
66
67Connections and IOs
68===================
69
70In the following table, the column **Pin** contains Pin names. For example, PA2
71means Pin number 2 on PORTA, as used in the board's datasheets and manuals.
72
73+-------+-------------+-------------------------------------+
74| Pin   | Function    | Usage                               |
75+=======+=============+=====================================+
76| PF4   | GPIO        | LED0                                |
77+-------+-------------+-------------------------------------+
78| PF5   | GPIO        | LED1                                |
79+-------+-------------+-------------------------------------+
80| PF6   | GPIO        | Push Button PB0                     |
81+-------+-------------+-------------------------------------+
82| PF7   | GPIO        | Push Button PB1                     |
83+-------+-------------+-------------------------------------+
84| PA5   | GPIO        | Board Controller Enable VCOM_ENABLE |
85+-------+-------------+-------------------------------------+
86| PA0   | USART0_TX   | UART Console VCOM_TX US0_TX #0      |
87+-------+-------------+-------------------------------------+
88| PA1   | USART0_RX   | UART Console VCOM_RX US0_RX #0      |
89+-------+-------------+-------------------------------------+
90| PC6   | SPI_MOSI    | Flash MOSI US1_TX #11               |
91+-------+-------------+-------------------------------------+
92| PC7   | SPI_MISO    | Flash MISO US1_RX #11               |
93+-------+-------------+-------------------------------------+
94| PC8   | SPI_SCLK    | Flash SCLK US1_CLK #11              |
95+-------+-------------+-------------------------------------+
96| PA4   | SPI_CS      | Flash Chip Select (GPIO)            |
97+-------+-------------+-------------------------------------+
98
99System Clock
100============
101
102The EFR32FG1P SoC is configured to use the 38.4 MHz external oscillator on the
103board.
104
105Serial Port
106===========
107
108The EFR32FG1P SoC has two USARTs and one Low Energy UARTs (LEUART).
109USART0 is connected to the board controller and is used for the console.
110
111Programming and Debugging
112*************************
113
114Flashing
115========
116
117Connect the BRD4001A board with a mounted BRD4250B radio module to your host
118computer using the USB port.
119
120Here is an example for the :zephyr:code-sample:`hello_world` application.
121
122.. zephyr-app-commands::
123   :zephyr-app: samples/hello_world
124   :board: slwrb4250b
125   :goals: flash
126
127Open a serial terminal (minicom, putty, etc.) with the following settings:
128
129- Speed: 115200
130- Data: 8 bits
131- Parity: None
132- Stop bits: 1
133
134Reset the board and you should see the following message in the terminal:
135
136.. code-block:: console
137
138   Hello World! slwrb4250b
139
140
141.. _EFR32FG1 Website:
142   https://www.silabs.com/wireless/proprietary/efr32fg1-series-1-sub-ghz-2-4-ghz-socs
143
144.. _EFR32FG1 Datasheet:
145   https://www.silabs.com/documents/public/data-sheets/efr32fg1-datasheet.pdf
146
147.. _EFR32xG1 Reference Manual:
148   https://www.silabs.com/documents/public/reference-manuals/efr32xg1-rm.pdf
149
150.. _SLWSTK6061B Proprietary Wireless Starter Kit:
151   https://www.silabs.com/products/development-tools/wireless/proprietary/slwstk6061b-efr32-flex-gecko-868-mhz-2-4-ghz-and-sub-ghz-starter-kit
152
153.. _BRD4250B User Guide:
154   https://www.silabs.com/documents/public/user-guides/ug182-brd4250b-user-guide.pdf
155
156.. _BRD4250B Reference Manual:
157   https://www.silabs.com/documents/public/reference-manuals/brd4250b-rm.pdf
158
159.. _EFR32FG1-BRD4250B Schematics:
160   https://www.silabs.com/documents/public/schematic-files/BRD4250B-B02-schematic.pdf
161