Flash and Authorize BK3431Q

Firmware flashing

BK3431Q supports firmware flashing through SPI or UART.

BK3431Q firmware consists of three parts: boot, stack, and app.

• bk3435_ble_app_merge_crc.bin is a binary after merging the boot, stack, and app. It can be flashed to the chip through SPI only.
• bk3435_ble_app_oad.bin is the binary of the application. It can be flashed to the chip through UART.
• bk3435_ble_app_stack_oad.bin is the binary of the stack and app. It can be flashed to the chip through UART.

SPI-based flashing

• Hardware

  BEKEN SPI flasher
  You can purchase the flasher from the chip vendor or contact your account manager.

• Programmer

  

  

• Procedure

1. Connect wires (SW SPI) as shown below.

   BEKEN SPI flasher	MOSI	MISO	P2.4	P2.3	GND	VPP	VCC	CS	WP
   BK3431Q pin	P04	P05	P02	P06	GND	RST	+3V	P07	P03

   If you use BEKEN’s development board, you can plug it directly into the computer without wiring.

2. Download BEKEN’s HID Download Tool to flash the firmware.

3. Open HID Download Tool, choose Download Mode > Port Select > SPI SOFT Software.

4. After selecting the firmware file and COM port, click Download Flash.

   The location and name of the firmware.

   

5. Check the information output from UART2.

   1. After the firmware is flashed, disconnect the BEKEN SPI flasher from BK3431Q.

   2. Connect BK3431Q to the computer using a USB to TTL converter.

   3. Press the reset button to reset BK3431Q.

      If information is output from the serial port, it means the firmware runs properly.

UART-based flashing

• Software

  Beken Writer

• Hardware

USB to UART converter with a CH340 chip.

• Procedure

1. Connect wires as shown below.

   USB to UART converter	VCC	GND	RX	TX
   BK3431Q pin	+3V	GND	UART_TX	UART_RX

2. Select the COM port, which should not exceed 10. If it exceeds, modify it in the device manager.

3. Select the firmware to download.

4. Click Flash to download firmware.

5. When the software shows success status, it indicates download is finished.

6. Then, the board can scan for advertising packets.

   The location and name of the firmware.

   

Firmware authorization

Get the license

For more information, see Authorize Bluetooth LE Series Modules.

Flashing and authorization

1. Connect UART1 on the chip to a USB to TTL converter.

2. Open Cloud Module Burning Authorization Platform, and enable Only Auth.

   

   If you use UART2 for authorization, ensure that you set the baud and UART on the software according to the code.

       ty_uart_init(); //9600
       ty_uart2_init(); //115200