Here provides an easy introduction of How to set up of MDBT50Q-DB!
MDBT50Q-DB, built by Raytac’s MDBT50Q-1M deployed nRF52840 SoC with Bluetooth 5 & Thread Combo module Demo Board. Equipped Raytac’s MDBT50Q-1M  with 1MB Flash Memory and 256KB RAM and Chip Antenna. Certifications include:  FCC, IC, CE, Telec, KC, SRRC, RCM, NCC, WPC 
mdbt50q demo board package 拷貝

Hardware Set Up

MDBT50Q-DB package contains:
  • 1 x MDBT50Q-DB
  • 1 x IDC Wire
  • 1 x Data/Power Mini USB Wire
Using Nordic DK as J-Link (either nRF51, nRF52 or nRF52840 DK) Connects with MDBT50Q by IDC wire. Powered up the MDBT50Q-DB by Micro USB wire.
IMG_0064.jpg
MDBT50Q-DB
MDBT50Q-DB Schematic
MDBT50Q Demo Board Schematic-V2.jpg
MDBT50Q-DB Schematic
Firmware Set Up Resource
Firmware Development
2. Unzip SDK
3. Use S140 Softdevice Softdevice (\nRF5_SDK_15.2.0_9412b96\components\softdevice\s140\hex\
s140_nrf52_6.1.0_softdevice.hex)

For more detail about the Firmware development, please refer to another article for more detail:
Firmware Program Steps
1. Selecting Programmer in nRF Connect
nrfconnent_main_screen.png
2. Selecting Program Device (refer to Nordic DK)

3. Adding Hex File

nrfconnect_protrammer_mail_screen 拷貝

4. Erase and Write

write_fw_finish.png

Note: If MDBT50Q-DB is powered by computer, it may detect USB connection. Pls click “No” to proceed and complete the firmware program.

write_fw_finish_show_USB_enable.png

 

**MDBT50Q-DB USB DFU
nRF52840 provides USB interface which enable to support Device Firmware Update (DFU) through USB directly.
Hardware Setup
1. Press Switch 4 and Hold
2. Power in the Demo Board
3. Blue LED stays light
4. Demo Board successfully enter USB DFU Mode
MDBT50Q-DB USB DFU.jpg
Firmware Setup
 
Note
  • USB DFU works in DOS mode only.
  • USB DFU only works with previous loaded firmware employs USB Bootloader feature only.
  • A single, merged hex file is required. Need to combine Bootloader, Softdevice, and Application.
  • Firmware DFU requests a zipped file.
USB Firmware DFU Steps:
1. When MDBT50Q-DB Blue LED Stays Light (shows ready to enter USB DFU Mode)
2. Find out the Com Port No. changed from “nRF52 USB CDC BLE Demo(COMxx)” tonRF52“SDFU USB(COMxx)”
3. Proceed the USB DFU
Enter DOS mode and select the file with the code in below
nrfutil dfu usb_serial -pkg usbd_ble_uart.zip -p COMxx
(usbd_ble-uart.zip refer to the code to update)
(xx refer to Com Port No.)
usb_dfu.png
4. USB DFU Completed
usb_dfu_finish.png
Tips: 
1. Bootloader example Code can be found: 
\nRF5_SDK_15.2.0_9412b96\examples\dfu\secure_bootloader\pca10056_usb\
Need to produce “micro_ecc_lib_nrf52.lib” and “public key” for latter development
2. How to merger the firmware 
  • Produce: bootloader_settings.hex

nrfutil.exe settings generate –family NRF52840 –application usbd_ble_uart.
hex –application-version 3 –bootloader-version 2 –bl-settings-version 1
bootloader_settings.hex

  • Merge bootloader 及bootloader settings file:

mergehex.exe -m Bootloader.hex bootloader_settings.hex  -o output_1.hex

  • Merge bootloader 、bootloader settings及softdevice:

mergehex.exe -m output_1.hex s140_nrf52_6.1.0_softdevice.hex  -o
output_2.hex

  • Merge the merged bootloader 、bootloader settings、softdevice及application:

mergehex.exe -m output_2.hex application.hex  -o usbd_ble_uart_sd_bt_app.hex

3. Zip the firmware
nrfutil pkg generate –hw-version 52 –sd-req 0xae –application-version
0xFF –application usbd_ble_uart.hex –key-file dfu.pem usbd_ble_uart.zip

Raytac Corporation
A BT5 & BT4.2 & BT4.1 module maker based on Nordic nRF51 & nRF52 solution 
(nRF51822 & nRF51422 & nRF52832 & nR52810 & nRF52840)
www.raytac.com          email: cs@raytac.com          Tel: +886.2.3234.0208

About the Author Raytac Corporation

Raytac Corporation, A Bluetooth Module Maker based on Nordic nRF52840 & nRF52832 & nRF51822 & nRF52810 Solution. Bluetooth Specification Version: BT5 & BT4.2 & BT4.1 & BT4.0 Website: www.raytac.com Mail: cs@raytac.com Tel: +886.2.3234.0208

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