This is the documentation for the latest (master) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Laird Connectivity BL653 DVK

Overview

The BL653 Development Kit (453-00039-K1, 453-00041-K1) hardware provides support for the Laird Connectivity BL653 module powered by a Nordic Semiconductor nRF52833 ARM Cortex-M4F CPU.

This development kit has the following features:

  • ADC

  • CLOCK

  • FLASH

  • GPIO

  • I2C

  • MPU

  • NVIC

  • PWM

  • RADIO (Bluetooth Low Energy and 802.15.4)

  • RTC

  • Segger RTT (RTT Console)

  • SPI

  • UART

  • USB

  • WDT

BL653 Development Kit

BL653 Development Kit Board

More information about the board can be found at the BL653 website 1.

Hardware

Supported Features

The BL653 DVK board configuration supports the following hardware features:

Interface

Controller

Driver/Component

ADC

on-chip

adc

CLOCK

on-chip

clock_control

FLASH

on-chip

flash

GPIO

on-chip

gpio

I2C(M)

on-chip

i2c

MPU

on-chip

arch/arm

NVIC

on-chip

arch/arm

PWM

on-chip

pwm

RADIO

on-chip

Bluetooth, ieee802154

RTC

on-chip

system clock

RTT

Segger

console

SPI(M/S)

on-chip

spi

UART

on-chip

serial

USB

on-chip

usb

WDT

on-chip

watchdog

Other hardware features are not supported by the Zephyr kernel. See BL653 website 1 for a complete list of BL653 Development Kit board hardware features.

Connections and IOs

LED

  • LED1 (blue) = P0.13

  • LED2 (blue) = P0.14

  • LED3 (blue) = P0.15

  • LED4 (blue) = P0.16

Push buttons

  • BUTTON1 = SW1 = P0.11

  • BUTTON2 = SW2 = P0.12

  • BUTTON3 = SW9 = P0.24

  • BUTTON4 = SW10 = P0.25

  • RESET = SW3 = nReset/IF BOOT

Programming and Debugging

Applications for the bl653_dvk board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details); however, the standard debugging targets are not currently available.

Flashing

Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. Further information can be found in Flashing. Then build and flash applications as usual (see Building an Application and Run an Application for more details).

Here is an example for the Hello World application.

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

NOTE: On the BL653 development board, the FTDI USB should be used to access the UART console.

$ minicom -D <tty_device> -b 115200

Replace <tty_device> with the port where the BL653 development kit can be found. For example, under Linux, /dev/ttyUSB0.

Then build and flash the application in the usual way.

# From the root of the zephyr repository
west build -b bl653_dvk samples/hello_world
west flash

Debugging

Refer to the Nordic nRF5x Segger J-Link page to learn about debugging Nordic based boards with a Segger IC.

Testing Bluetooth on the BL653 DVK

Many of the Bluetooth examples will work on the BL653 DVK. Try them out:

Testing the LEDs and buttons on the BL653 DVK

There are 2 samples that allow you to test that the buttons (switches) and LEDs on the board are working properly with Zephyr:

You can build and flash the examples to make sure Zephyr is running correctly on your board. The button and LED definitions can be found in boards/arm/bl653_dvk/bl653_dvk.dts.

Using UART1

The following approach can be used when an application needs to use more than one UART for connecting peripheral devices:

  1. Add devicetree overlay file to the main directory of your application:

    $ cat bl653_dvk.overlay
    &uart1 {
      compatible = "nordic,nrf-uarte";
      current-speed = <115200>;
      status = "okay";
      tx-pin = <14>;
      rx-pin = <16>;
    };
    

    In the overlay file above, pin P0.16 is used for RX and P0.14 is used for TX

  2. Use the UART1 as device_get_binding(DT_LABEL(DT_NODELABEL(uart1)))

Overlay file naming

The file has to be named <board>.overlay and placed in the app main directory to be picked up automatically by the build system.

See Set devicetree overlays for further details.

Selecting the pins

To select the pin numbers for tx-pin and rx-pin:

tx-pin = <pin_no>

Open the nRF52833 Product Specification 2, chapter 7 ‘Hardware and Layout’. In the table 7.1.1 ‘aQFN73 ball assignments’ select the pins marked ‘General purpose I/O’. Note that pins marked as ‘low frequency I/O only’ can only be used in under-10KHz applications. They are not suitable for 115200 speed of UART.

Translate the ‘Pin’ into number for devicetree by using the following formula:

pin_no = b*32 + a

where a and b are from the Pin value in the table (Pb.a). For example, for P0.1, pin_no = 1 and for P1.0, pin_no = 32.