.. zephyr:board:: bl5340_dvk

Overview

The BL5340 Development Kit provides support for the Ezurio BL5340 module which is powered by a dual-core Nordic Semiconductor nRF5340 ARM Cortex-M33F CPU. The nRF5340 inside the BL5340 module is a dual-core SoC based on the Arm® Cortex®-M33 architecture, with:

a full-featured Arm Cortex-M33F core with DSP instructions, FPU, and Armv8-M Security Extension, running at up to 128 MHz, referred to as the application core
a secondary Arm Cortex-M33 core, with a reduced feature set, running at a fixed 64 MHz, referred to as the network core.

The bl5340_dvk/nrf5340/cpuapp build target provides support for the application core on the BL5340 module. The bl5340_dvk/nrf5340/cpunet build target provides support for the network core on the BL5340 module. If ARM TrustZone is used then the bl5340_dvk/nrf5340/cpuapp build target provides support for the non-secure partition of the application core on the BL5340 module.

This development kit has the following features:

:abbr:ADC (Analog to Digital Converter)
CLOCK
FLASH
:abbr:GPIO (General Purpose Input Output)
:abbr:IDAU (Implementation Defined Attribution Unit)
:abbr:I2C (Inter-Integrated Circuit)
:abbr:I2S (Inter-Integrated Sound)
:abbr:MPU (Memory Protection Unit)
:abbr:NVIC (Nested Vectored Interrupt Controller)
:abbr:PWM (Pulse Width Modulation)
:abbr:QSPI (Quad Serial Peripheral Interface)
RADIO (Bluetooth Low Energy and 802.15.4)
:abbr:RTC (nRF RTC System Clock)
Segger RTT (RTT Console)
:abbr:SPI (Serial Peripheral Interface)
:abbr:UARTE (Universal asynchronous receiver-transmitter)
:abbr:USB (Universal Serial Bus)
:abbr:WDT (Watchdog Timer)

More information about the module can be found on the BL5340 homepage_.

The Nordic Semiconductor Infocenter_ contains the processor's information and the datasheet.

Hardware

The BL5340 DVK has two external oscillators. The frequency of the slow clock is 32.768KHz. The frequency of the main clock is 32MHz.

Supported Features

.. zephyr:board-supported-hw::

See Nordic Semiconductor Infocenter_ for a complete list of hardware features.

Connections and IOs

An eight-pin GPIO port expander is used to provide additional inputs and outputs to the BL5340 module.

Refer to the TI TCA9538 datasheet_ for further details.

LEDs

LED1 (blue) = via TCA9538 port expander channel P4 (active low)
LED2 (blue) = via TCA9538 port expander channel P5 (active low)
LED3 (blue) = via TCA9538 port expander channel P6 (active low)
LED4 (blue) = via TCA9538 port expander channel P7 (active low)

Push buttons

BUTTON1 = SW1 = via TCA9538 port expander channel P0 (active low)
BUTTON2 = SW2 = via TCA9538 port expander channel P1 (active low)
BUTTON3 = SW3 = via TCA9538 port expander channel P2 (active low)
BUTTON4 = SW4 = via TCA9538 port expander channel P3 (active low)
BOOT = boot (active low)

External Memory

Several external memory sources are available for the BL5340 DVK. These are described as follows.

Flash Memory

A Macronix MX25R6435FZNIL0 8MB external QSPI Flash memory part is incorporated for application image storage and large datasets.

Refer to the Macronix MX25R6435FZNIL0 datasheet_ for further details.

EEPROM Memory

A 32KB Giantec GT24C256C-2GLI-TR EEPROM is available via I2C for storage of infrequently updated data and small datasets.

Refer to the Giantec GT24C256C-2GLI-TR datasheet_ for further details.

External Memory

An on-board micro SD card slot is available for use with micro SD cards.

Sensors

The BL5340 DVK incorporates two sensors for user application testing. These are described as follows.

Temperature, Pressure, Humidity & Air Quality Sensor

A Bosch BME680 Temperature, Pressure, Humidity & Air Quality sensor is available via I2C for environmental measurement applications.

Refer to the Bosch BME680 datasheet_ for further details.

3-Axis Accelerometer

An ST Microelectronics LIS3DH 3-Axis Accelerometer is available via I2C for vibration and motion detection applications.

Refer to the ST Microelectronics LIS3DH datasheet_ for further details.

Ethernet

Cabled 10/100 Base-T Ethernet Connectivity is available via a Microchip ENC424J600 Ethernet controller.

Refer to the Microchip ENC424J600 datasheet_ for further details.

TFT Display & Capacitive Touch Screen Controller

A 2.8 inch, 240 x 320 pixel TFT display with capacitive touch controller is included with the BL5340 DVK for user interface application features.

Refer to the ER_TFTM028_4 datasheet_ for a high level overview of the display.

An ILI9341 TFT controller is incorporated in the TFT module and acts as the main controller, controlled via SPI.

Refer to the ILI9341 datasheet_ for further details.

An FT6206 Capacitive Touch Controller, controlled via I2C is also incorporated in the TFT module.

Refer to the FT6206 datasheet_ for further details.

Real-Time Clock

A real-time clock is available for accurate time data availability.

Refer to the Microchip MCP7940N datasheet_ for further details.

DAC

A 10-bit Digital to Analog Converter is incorporated for generation of variable voltages.

Refer to the Microchip MCP4725 datasheet_ for further details.

Security components

Implementation Defined Attribution Unit (IDAU_) on the application core. The IDAU is implemented with the System Protection Unit and is used to define secure and non-secure memory maps. By default, all of the memory space (Flash, SRAM, and peripheral address space) is defined to be secure accessible only.
Secure boot.

Programming and Debugging

.. zephyr:board-supported-runners::

The BL5340's application core supports the Armv8-M Security Extension. Applications built for the bl5340_dvk/nrf5340/cpuapp board by default boot in the Secure state.

The BL5340's network core does not support the Armv8-M Security Extension. The IDAU may configure bus accesses by the network core to have Secure attribute set; the latter allows to build and run Secure only applications on the BL5340 module.

Building Secure/Non-Secure Zephyr applications with Arm® TrustZone®

Applications on the BL5340 module may contain a Secure and a Non-Secure firmware image for the application core. The Secure image can be built using either Zephyr or Trusted Firmware M_ (TF-M). Non-Secure firmware images are always built using Zephyr. The two alternatives are described below.

.. note::

By default the Secure image for BL5340's application core is built using TF-M.

Building the Secure firmware with TF-M

The process to build the Secure firmware image using TF-M and the Non-Secure firmware image using Zephyr requires the following steps:

Build the Non-Secure Zephyr application for the application core using -DBOARD=bl5340_dvk/nrf5340/cpuapp/ns. To invoke the building of TF-M the Zephyr build system requires the Kconfig option BUILD_WITH_TFM to be enabled, which is done by default when building Zephyr as a Non-Secure application. The Zephyr build system will perform the following steps automatically:
- Build the Non-Secure firmware image as a regular Zephyr application
- Build a TF-M (secure) firmware image
- Merge the output image binaries together
- Optionally build a bootloader image (MCUboot)

.. note::

Depending on the TF-M configuration, an application DTS overlay may be required, to adjust the Non-Secure image Flash and SRAM starting address and sizes.

Build the application firmware for the network core using -DBOARD=bl5340_dvk/nrf5340/cpunet.

Building the Secure firmware using Zephyr

The process to build the Secure and the Non-Secure firmware images using Zephyr requires the following steps:

Build the Secure Zephyr application for the application core using -DBOARD=bl5340_dvk/nrf5340/cpuapp and CONFIG_TRUSTED_EXECUTION_SECURE=y and CONFIG_BUILD_WITH_TFM=n in the application project configuration file.
Build the Non-Secure Zephyr application for the application core using -DBOARD=bl5340_dvk/nrf5340/cpuapp/ns.
Merge the two binaries together.
Build the application firmware for the network core using -DBOARD=bl5340_dvk/nrf5340/cpunet.

When building a Secure/Non-Secure application for the BL5340's application core, the Secure application will have to set the IDAU (SPU) configuration to allow Non-Secure access to all CPU resources utilized by the Non-Secure application firmware. SPU configuration shall take place before jumping to the Non-Secure application.

Building a Secure only application

Build the Zephyr app in the usual way (see :ref:build_an_application and :ref:application_run), using -DBOARD=bl5340_dvk/nrf5340/cpuapp for the firmware running on the BL5340's application core, and using -DBOARD=bl5340_dvk/nrf5340/cpunet for the firmware running on the BL5340's network core.

Flashing

Follow the instructions in the :ref:nordic_segger page to install and configure all the necessary software. Further information can be found in :ref:nordic_segger_flashing. Then you can build and flash applications as usual (:ref:build_an_application and :ref:application_run for more details).

.. warning::

The BL5340 has a flash read-back protection feature. When flash read-back protection is active, you will need to recover the chip before reflashing. If you are flashing with :ref:west <west-build-flash-debug>, run this command for more details on the related --recover option:

.. code-block:: console

  west flash -H -r nrfjprog --no-rebuild

.. note::

Flashing and debugging applications on the BL5340 DVK requires upgrading the nRF Command Line Tools to version 10.12.0 or newer. Further information on how to install the nRF Command Line Tools can be found in :ref:nordic_segger_flashing.

Here is an example for the :zephyr:code-sample:hello_world application running on the BL5340's application core.

First, run your favorite terminal program to listen for output.

.. code-block:: console

$ minicom -D <tty_device> -b 115200

Replace :code:<tty_device> with the port where the BL5340 DVK board can be found. For example, under Linux, :code:/dev/ttyACM0.

Then build and flash the application in the usual way.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: bl5340_dvk/nrf5340/cpuapp :goals: build flash

Debugging

Refer to the :ref:nordic_segger page to learn about debugging boards with a Segger IC.

Testing Bluetooth on the BL5340 DVK

Many of the Bluetooth examples will work on the BL5340 DVK. Try them out:

:zephyr:code-sample:ble_peripheral
:zephyr:code-sample:bluetooth_eddystone
:zephyr:code-sample:bluetooth_ibeacon

References

.. target-notes::