This lab takes you step-by-step through the process of updating the firmware on the BM71 module. New firmware can add BLE specific functionality for new revisions of the Bluetooth specification as well as provide a way to fix bugs discovered in the current device Bluetooth operation.
Contact your local Microchip Sales office to obtain BM71 firmware package updates.
- ISupdate Programming Utility
- BM71 Firmware Package (v1.06 provided)
- MCP2200 Windows® Drivers & Installer
The UART RX and TX lines are used to communicate between the Host MCU and the BM70.
The first thing we will do is check which firmware version we currently have on the module.
Connect to BM71
Connect the BM71 PICtail to your PC via the USB connector (bottom-side of the board) using the supplied USB Cable. Ensure the jumpers J3, JP8, J1 (all yellow in this photo) are set as shown:
Place the module in Test Mode by setting SW7 in the ON position, then press SW5 (reset) to reset the module.
The Module's basic operating mode (Test/Application) is sampled and established on a module reset condition. We recommend pressing the Reset (SW5) push-button whenever SW7 is first changed, or when you want to be sure that SW7 is sampled and applied by the module.
With Jumper JP8 shorted, LED0 will be lit (BLUE) indicating the module is in Test Mode, as shown above.
Launch the ISupdate Programming Utility and select the correct COM port (from substep a). Set the baudrate to 115200 and the memory type to Flash/Embedded. Then click Connect.
If the connection was successful you will see the following message:
Click on the Browse button and navigate to the folder where you extracted the BM71 Firmware Package earlier. Select all the needed Hex files in the dialog box and click Open.
You can verify that you have the new firmware version by clicking Read under the Flash/EEPRom/MCU/AHB Access section again.
Lastly, you can click Disconnect and close the ISupdate tool.