Appendix A. Loading RN4870 Firmware into the BM70 Compact Demo Board
Last modified by Microchip on 2023/11/09 09:03
The RN4870 firmware can be loaded into the BM-70-CDB using a PC Tool isup- date.exe over the USB port. The latest RN4870 firmware images and the isup- date.exe tool are available from the product web page at RN4870product page.
While uploading the firmware on BM-70-CDB, the J6 jumper pins 2 and 3 should be closed and jumper J8 (current measurement test point) should be closed. The jumpers J6 and J8 should not be disturbed during firmware updates, otherwise, the firmware will be corrupted.
Procedure:
Download the firmware zip file from the product web page and extract the contents. The zip file contains the isupdate.exe utility and a folder including the firmware images.
Connect the BM-70-CDB to the host PC using the micro USB cable.
Verify that USB power is selected in J6 (close pins 2 and 3) and J8 (current measurement test point) is closed.
Verify that Switch 2 on SW2 is set to ON position.
Press the SW1 (Reset) button and verify that LD2 is showing a non-flashing blue that indicates the RN4870 is in Programming mode.
Launch the isupdate.exe application as shown in:
Select the COM port used by the CDB
Verify that other settings (baud rate, memory type, and address) are set as shown in Figure A-1.
FIGURE A-1: ISUPDATE.EXE FIRMWARE UPDATE UTILITY
Click the Connect button as shown in Figure A-1.
Verify that "Port connect -> COMxx" is displayed in the text box, as shown in Figure A-2.
FIGURE A-2: MODULE CONNECTTED FROM ISUPDATE.EXE
Click the Browse button to select the firmware files that needs to be flashed on the BM70 module.
Click the Update button to flash the selected image.
Verify firmware update is successfully completed. The "End of Write Memory" message is displayed as shown in Figure A-3.
Figure FIGURE A-3: FIRMWARE UPDATED SUCCESSFULLY
Click the Disconnect button to close the COM port. The "port disconnect" message is displayed as indicated in Figure A-4.
FIGURE A-4: DISCONNECT ISUPDATE.EXE FROM MODULE
Set Switch 2 on SW2 to the '2' position for Application mode.
Open TeraTerm and connect to the module.
Press SW1 to reboot the module. Ensure that the %REBOOT% message is dis- played.
Enter Command mode by sending $ escape sequence.
Enter the V command and verify firmware version as illustrated in Figure A-5.
If you need to work with Microchip Support staff directly, you can submit a technical support case. Keep in mind that many questions can be answered through our self-help resources, so this may not be your speediest option.
