RIGADO BMD-34 EVAL Series User manual

Rev 2.0
BMD-34x-EVAL User Guide

BMD-34x-EVAL User Guide Rev 2.0
1
Contents
Table of Contents
Contents ...............................................................................................................................................1
Introduction .........................................................................................................................................2
2.1 Key Features.................................................................................................................................2
Hardware Kit.........................................................................................................................................3
Development Tools..............................................................................................................................4
Application Firmware Development ...................................................................................................5
5.1 Set up the tool chain....................................................................................................................5
5.2 Connect BMD-34x-EVAL to computer ..........................................................................................6
5.3 Open an example project.............................................................................................................7
Hardware Description..........................................................................................................................8
6.1 Power............................................................................................................................................8
6.1.1 Powering the Board................................................................................................................8
6.1.2 USB Peripheral Power............................................................................................................9
6.2 Reset .............................................................................................................................................9
6.3 Buttons .......................................................................................................................................11
6.4 LEDs ............................................................................................................................................11
6.5 Virtual COM Port.........................................................................................................................12
6.6 32kHz Crystal Oscillator.............................................................................................................12
6.7 NFC Connector ...........................................................................................................................13
6.8 Current Sensing Headers ...........................................................................................................13
6.9 External Segger J-Link™ Debug Interface..................................................................................14
6.10 QSPI ............................................................................................................................................15
6.11 GPIO Jumpers.............................................................................................................................15
6.12 Header Pin-out ...........................................................................................................................16
Related Documents............................................................................................................................17
Life Support and other High-Risk Use Warning.................................................................................17
Environmental....................................................................................................................................18
9.1 RoHS ...........................................................................................................................................18
9.2 REACH......................................................................................................................................... 18
9.3 California Proposition 65 (P65)..................................................................................................18
Contact Information...........................................................................................................................19
List of Tables....................................................................................................................................... 19
List of Figures .....................................................................................................................................19
Document History ..............................................................................................................................20

BMD-34x-EVAL User Guide Rev 2.0
2
Introduction
The BMD-34x-EVAL kit from Rigado allows for stand-alone use of the BMD-340, BMD-341, BMD-370, or
BMD-380 module featuring the Nordic nRF52840 RF System on Chip (SoC). Other Rigado modules have
evaluation kits covered by other documents.
The Evaluation Kit provides a great starting point for almost any Bluetooth 5 Low Energy, Thread, or
Zigbee project. All features of the BMD-340/341/370/380 are easily accessed from the evaluation
board. A simple USB connection provides power, programming, and a virtual COM port. Four user
buttons are available, as well as a USB peripheral connector, four LEDs and a reset button. All 48 GPIO
are available on headers that are compatible with the Arduino form factor (44 GPIO for the BMD-380).
This allows easy use of any existing Arduino shields. Current sense resistors allow for measuring
current into the module and into the shield.
This guide provides setup instructions for starting development and describes the hardware
functionality of the BMD-34x-EVAL boards.
2.1 Key Features
•BMD-340, BMD-341, BMD-370, or BMD-380
Module
•On-board programming and debug
(Segger J-Link-OB)
•Able to program external modules
•Virtual COM port over USB
•Full GPIO of the BMD-340 / nRF52840
•Buttons and LEDs for user interaction
•NFC antenna connector
•32.768kHz Crystal
•CR2032 battery holder
•USB peripheral connector

BMD-34x-EVAL User Guide Rev 2.0
3
Hardware Kit
Figure 1 –BMD-34x-EVAL Board (Top View)
BMD-340-EVAL:
•BMD-340 Evaluation Board
•Micro-USB Cable
•NFC antenna
BMD-341-EVAL:
•BMD-341 Evaluation Board
•Micro-USB Cable
•NFC antenna
•2.4GHz antenna kit
BMD-370-EVAL:
•BMD-370 Evaluation Board
•Micro-USB Cable
•NFC antenna
BMD-380-EVAL:
•BMD-380 Evaluation Board
•Micro-USB Cable
•NFC antenna

BMD-34x-EVAL User Guide Rev 2.0
4
Development Tools
The tools listed below will aid in development with the BMD-34x Series Bluetooth modules. Not all
tools will be required depending on which software suite is used.
Tool
Description
Segger Embedded Studio
Segger Embedded Studio is an easy-to-use integrated development
environment with project management tools, editor and debugger supporting
ARM Cortex devices. Full debug support including Real Time Terminal (RTT)
output is also available. Available for Windows, macOS, and Linux.
Free license for use with the Nordic nRF5 ICs and modules:
http://license.segger.com/Nordic.cgi
Segger J-Link Software and
Documentation Pack
J-Link Commander (JLink.exe) is a command line-based utility that can be used
for verifying proper functionality of J-Link as well as for simple analysis of the
target system. It supports some simple commands, such as memory dump, halt,
step, go etc. to verify the target connection. Available for Windows, macOS, and
Linux.
Nordic Semiconductor SDK
The nRF5 SDK is your first stop for building fully featured, reliable and secure
applications with the nRF52 and nRF51 Series. It offers developers a wealth of
varied modules and examples right across the spectrum including numerous
Bluetooth Low Energy profiles, Device Firmware Upgrade (DFU), GATT serializer
and driver support for all peripherals on all nRF5 Series devices.
SDKs for Bluetooth Mesh, Thread, Zigbee and other protocols are also available.
Nordic Semiconductor
nRF Connect for Desktop
nRF Connect is a cross-platform tool that enables testing and development with
Bluetooth® Low Energy (previously called Bluetooth Smart). It allows easy setup
of connections with other devices and uses these connections to read and write
the external nodes. Available for Windows, macOS, and Linux.
Nordic Semiconductor
nRF Connect for Mobile
nRF Connect for Mobile, previously known as nRF Master Control Panel, is a
powerful generic tool that allows you to scan and explore your Bluetooth Low
Energy devices and communicate with them. nRF Connect for Mobile supports
several Bluetooth SIG adopted profiles, as well as the Device Firmware Update
profile (DFU) from Nordic Semiconductor or Eddystone from Google. Available
for iOS and Android.
Nordic Semiconductor
Mobile Apps
Additional mobile utilities for your application development. Available for iOS
and Android.
Table 1 –Useful Tools

BMD-34x-EVAL User Guide Rev 2.0
5
Application Firmware Development
This section walks through how to set up and program the BMD-340-EVAL Kit with an example
application.
5.1 Set up the tool chain
1) Install Segger Embedded Studio and request a license.
2) Download the latest nRF5 SDK. Unzip it to a convenient working directory. Be sure not to alter
the directory trees. The examples are configured for relative path positions.
3) Install nRF Connect on desktop PC and optionally one of the mobile versions. nRF Connect can
be used directly with the Device Under Test (DUT) Eval board for programming and other
features.
If using nRF Connect on a desktop, a second Eval board or a nRF52 USB Dongle will be needed
to make BLE connections with your DUT.
4) Install the Segger J-Link Commander. If presented with a screen to select different IDEs,
ensure at least the “SEGGER Embedded Studio ARM” line is selected:
Figure 2 –SEGGER J-Link Commander Install
5) You may need to add the install location to the system PATH. The default location for the J-
Link Commander is: C:\Program Files (x86)\SEGGER\JLink_Vnnn
… where “nnn” is the version number.
6) Install nRF Toolbox for your mobile device. This will be used with the example below.

BMD-34x-EVAL User Guide Rev 2.0
6
5.2 Connect BMD-34x-EVAL to computer
The evaluation board is provided with an on-board Segger J-Link programmer/debugger.
1. Connect the board to a computer using the USB cable provided.
2. The status LED, D5, will flash and then turn solid once the USB device is enumerated.
3. After a few seconds the computer will recognize the Evaluation Board as a J-Link device and
install the USB-Virtual COM Port device driver.
4. Run the J-Link Commander:
a. JLink on Windows
b. JLinkExe on macOS and Linux
5. Type “connect” at the J-Link> prompt
6. Enter the device type at the Device> prompt
a. Type nRF52840_XXAA for the BMD-340
7. Enter Sto select the SWD interface and accept the default for the speed.
8. J-Link will respond with several items. Here is a sample output:
Figure 3 –J-Link Commander Output

BMD-34x-EVAL User Guide Rev 2.0
7
9. This confirms that the Eval board is properly recognized.
10. While still in the J-Link Commander session, save the Rigado-programmed public MAC
address by typing in:
savebin mac_addr.bin 0x10001080 8
11. Save the file mac_addr.bin to a convenient location for future use.
12. Exit the J-Link session by typing
exit
13. At this point, a file titled mac_addr.bin will be saved in the current directory. The contents will
contain the MAC address in little-endian format:
33 22 11 93 54 94 FF FF
to correspond to the address 94:54:93:11:22:33. The last two FF values are only fillers to
complete the two 4-byte reads. Rigado MAC addresses begin with the IEEE-assigned Company
ID (94:54:93). The remaining bytes are printed on the 2D and human-readable label on the
module. See the MAC Address Provisioning KB article for additional information.
14. This file may be used to restore the MAC address after performing an erase or recover with the
J-Link command
loadbin mac_address.bin 0x10001080
5.3 Open an example project
Note: When selecting examples from the SDK, note the following cross reference:
Rigado Eval Board
Nordic SoC
Compatible Nordic DK
BMD-340-EVAL
nRF52840
PCA10056 / nRF52840 DK
BMD-341-EVAL
nRF52840
PCA10056 / nRF52840 DK
BMD-370-EVAL
nRF52833
PCA10056 / nRF52840 DK
BMD-380-EVAL
nRF52840
PCA10056 / nRF52840 DK
Table 2 –Rigado EVAL to Nordic DK cross reference
For this guide, the nRF SDK v15.3.0 Heart Rate Service example for the BMD-340-EVAL will be used.
1. Navigate to the location of the heart rate example from the SDK, typically
<unzipped location>\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs
2. Select the DK Board, SoftDevice and IDE directories. Here is the full path:
<unzipped location>\
nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_hrs\ pca10056\s140\ses
3. Open the project file (ble_app_hrs_pca10056_s140.emProject) to start the Segger Embedded
Studio IDE
4. Build the project (<F7>)
5. Once the build is successful, you can download the application code onto the module Board
(Target | Download ble_app_hrs_pca10056_s140)
The first time the board is loaded, both the SoftDevice and the application will be downloaded
to the module. Once the SoftDevice is loaded, subsequent downloads will only transfer the
application. If you need to change SoftDevice versions, repeat section Error! Reference
source not found. Error! Reference source not found. Error! Reference source not found..
6. On a mobile device, open the nRF Toolbox application. Select the Heart Rate Monitor.
7. Tap Connect. You should see the Eval board advertising as Nordic_HRM.
8. Select this device to see the simulated heart rate being transmitted from the BMD-300.
Additional training videos may be viewed here.

BMD-34x-EVAL User Guide Rev 2.0
8
Hardware Description
Design files for the BMD-34x-EVAL board may be found on the Rigado website.
Figure 4 –Assembly Drawing (Top View)
6.1 Power
The BMD-340-EVAL has five possible power sources:
•USB from the debug interface
•USB peripheral on the BMD-340 itself
•CR2032 coin cell battery
•0.1” through-hole connector for connecting 3.3V
•Lithium Polymer (LiPo) battery input.
These power sources use protection diodes to prevent reverse voltage to any supply. This allows them
to be used simultaneously. Solder jumpers are provided to allow by-passing any of the protection
diodes eliminating the voltage drop across them. Care should be taken to not damage the supplies
when the protection is by-passed.
6.1.1 Powering the Board
During typical debugging, power will be provided by VBUS on the USB debug interface to supply +5V
to the 3.3V LDO regulator and to the shield connector. The 3.3V LDO regulator will then power VIO,
VSHLD, and VBMD.
When powering the board from the CR2032 coin cell (3VDC), the external power header, or the LiPo
header, USB can be left disconnected. In this configuration, the interface IC is held in reset to conserve

BMD-34x-EVAL User Guide Rev 2.0
9
power. Only if the power protection diodes are left intact, USB can be connected at the same time the
coin cell or external power is still applied allowing for easy programming of the module.
6.1.2 USB Peripheral Power
VBUS Power from the USB Peripheral interface on the BMD-340 may be used to power the BMD-340-
EVAL by moving SW7 to the “HV” setting. This enables the internal high-voltage regulator (LDO or DC-
DC). When in the HV setting, the power switch SW6 should be left in the OFF position, especially if any
of the protection diodes are bypassed.
Figure 5 –Schematic –Power Supply
6.2 Reset
The BMD-34x module has a configurable hardware reset. P0.18 is assumed to be used as the reset pin
for all Rigado and Nordic example projects, and thus the evaluation board hardware is configured to
use P0.18 as a reset. The Reset button can be configured to connect to an input on the interface IC or
to directly connect to P0.18.