204 lines
7.6 KiB
ReStructuredText
204 lines
7.6 KiB
ReStructuredText
.. _efr32mg_sltb004a:
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EFR32MG-SLTB004A
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################
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Overview
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********
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The EFR32™ Mighty Gecko Starter Kit EFR32MG-SLTB004A (a.k.a Thunderboard
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Sense 2) contains a MCU from the EFR32MG family built on ARM® Cortex®-M4F
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processor with low power capabilities.
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.. image:: ./efr32mg_sltb004a.jpg
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:width: 640px
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:align: center
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:alt: EFR32MG-SLTB004A
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Hardware
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********
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- EFR32MG12 Mighty Gecko Wireless SoC with 38.4 MHz operating frequency
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- ARM® Cortex® M4 core with 256 kB RAM and 1024 kB Flash
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- Macronix ultra low power 8-Mbit SPI flash (MX25R8035F)
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- 2.4 GHz ceramic antenna for wireless transmission
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- Silicon Labs Si7021 relative humidity and temperature sensor
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- Silicon Labs Si1133 UV index and ambient light sensor
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- Silicon Labs Si7210 hall effect sensor
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- Bosch Sensortec BMP280 barometric pressure sensor
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- ams CCS811 indoor air quality gas sensor
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- TDK InvenSense ICM-20648 6-axis inertial sensor
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- TDK InvenSense ICS-43434 MEMS microphone
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- Four high brightness RGB LEDs from Broadcom Limited (ASMT-YTB7-0AA02)
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- One bi-color LED and two push buttons
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- Power enable signals for fine grained power-control
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- On-board SEGGER J-Link debugger for easy programming and debugging, which
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includes a USB virtual COM port
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- Mini Simplicity connector for access to energy profiling and advanced wireless
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network debugging
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- Breakout pads for GPIO access and connection to external hardware
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- Reset button
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- Automatic switch-over between USB and battery power
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- CR2032 coin cell holder and external battery connector
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For more information about the EFR32MG SoC and Thunderboard Sense 2
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(EFR32MG-SLTB004A) board:
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- `EFR32MG Website`_
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- `EFR32MG Datasheet`_
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- `EFR32MG Reference Manual`_
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- `EFR32MG-SLTB004A Website`_
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- `EFR32MG-SLTB004A User Guide`_
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- `EFR32MG-SLTB004A Schematics`_
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Supported Features
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==================
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The efr32mg_sltb004a board configuration supports the following hardware features:
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+-----------+------------+-------------------------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+=====================================+
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| NVIC | on-chip | nested vector interrupt controller |
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+-----------+------------+-------------------------------------+
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| SYSTICK | on-chip | systick |
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+-----------+------------+-------------------------------------+
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| FLASH | on-chip | flash memory |
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+-----------+------------+-------------------------------------+
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| GPIO | on-chip | gpio |
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+-----------+------------+-------------------------------------+
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| UART | on-chip | serial port-polling; |
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| | | serial port-interrupt |
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+-----------+------------+-------------------------------------+
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| I2C | on-chip | i2c port-polling |
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+-----------+------------+-------------------------------------+
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The default configuration can be found in the defconfig file:
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``boards/arm/efr32mg_sltb004a/efr32mg_sltb004a_defconfig``.
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Other hardware features are currently not supported by the port.
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Connections and IOs
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===================
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The EFR32MG SoC has eight gpio controllers (PORTA, PORTB, PORTC, PORTD,
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PORTF, PORTI, PORTJ and PORTK).
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In the following table, the column Name contains Pin names. For example, PE2
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means Pin number 2 on PORTE and #27 represents the location bitfield , as used
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in the board's and microcontroller's datasheets and manuals.
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+------+-------------+-----------------------------------+
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| Name | Function | Usage |
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+======+=============+===================================+
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| PD8 | GPIO | LED0 (RED) |
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+------+-------------+-----------------------------------+
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| PD9 | GPIO | LED1 (GREEN) |
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+------+-------------+-----------------------------------+
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| PD14 | GPIO | SW0 Push Button PB0 |
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+------+-------------+-----------------------------------+
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| PD15 | GPIO | Push Button PB1 |
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+------+-------------+-----------------------------------+
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| PA0 | UART_TX | UART TX Console VCOM_TX US0_TX #0 |
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+------+-------------+-----------------------------------+
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| PA1 | UART_RX | UART RX Console VCOM_RX US0_RX #0 |
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+------+-------------+-----------------------------------+
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| PF3 | UART_TX | EXP12_UART_TX LEU0_TX #27 |
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+------+-------------+-----------------------------------+
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| PF4 | UART_RX | EXP14_UART_RX LEU0_RX #27 |
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+------+-------------+-----------------------------------+
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| PC10 | I2C_SDA | EXP16_I2C_SDA I2C0_SDA #15 |
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+------+-------------+-----------------------------------+
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| PC11 | I2C_SCL | EXP15_I2C_SCL I2C0_SCL #15 |
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+------+-------------+-----------------------------------+
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| PC4 | I2C_SDA | ENV_I2C_SDA I2C1_SDA #17 |
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+------+-------------+-----------------------------------+
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| PC5 | I2C_SCL | ENV_I2C_SCL I2C1_SCL #17 |
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+------+-------------+-----------------------------------+
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System Clock
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============
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The EFR32MG SoC is configured to use the 38.4 MHz external oscillator on the
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board.
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Serial Port
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===========
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The EFR32MG SoC has four USARTs and one Low Energy UARTs (LEUART with 9600
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maximum baudrate). USART0 is configured as the Zephyr console and is connected
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to the On-Board J-Link Debugger that presents a virtual COM port for general
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purpose application serial data transfer with this interface.
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Programming and Debugging
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*************************
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.. note::
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Before using the kit the first time, you should update the J-Link firmware
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from `J-Link-Downloads`_
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Flashing
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========
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The EFR32MG-SLTB004A includes an `J-Link`_ serial and debug adaptor built into the
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board. The adaptor provides:
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- A USB connection to the host computer, which exposes a Mass Storage and a
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USB Serial Port.
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- A Serial Flash device, which implements the USB flash disk file storage.
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- A physical UART connection which is relayed over interface USB Serial port.
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Flashing an application to EFR32-SLTB004A
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-----------------------------------------
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The sample application :ref:`hello_world` is used for this example.
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Build the Zephyr kernel and application:
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: efr32mg_sltb004a
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:goals: build
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Connect the EFR32MG-SLTB004A to your host computer using the USB port and you
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should see a USB connection which exposes a Mass Storage (TB004) and a
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USB Serial Port. Copy the generated zephyr.bin in the SLTB004A drive.
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Open a serial terminal (minicom, putty, etc.) with the following settings:
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- Speed: 115200
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- Data: 8 bits
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- Parity: None
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- Stop bits: 1
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Reset the board and you should be able to see on the corresponding Serial Port
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the following message:
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.. code-block:: console
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Hello World! arm
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.. _EFR32MG-SLTB004A Website:
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https://www.silabs.com/products/development-tools/thunderboard/thunderboard-sense-two-kit
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.. _EFR32MG-SLTB004A User Guide:
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https://www.silabs.com/documents/public/user-guides/ug309-sltb004a-user-guide.pdf
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.. _EFR32MG-SLTB004A Schematics:
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https://www.silabs.com/documents/public/schematic-files/TBSense2-BRD4166A-D00-schematic.pdf
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.. _EFR32MG Website:
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https://www.silabs.com/products/wireless/mesh-networking/efr32mg-mighty-gecko-zigbee-thread-soc
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.. _EFR32MG Datasheet:
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https://www.silabs.com/documents/public/data-sheets/efr32mg12-datasheet.pdf
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.. _EFR32MG Reference Manual:
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https://www.silabs.com/documents/public/reference-manuals/efr32xg12-rm.pdf
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.. _J-Link:
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https://www.segger.com/jlink-debug-probes.html
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.. _J-Link-Downloads:
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https://www.segger.com/downloads/jlink
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