How can I generate a .gbl file for Device Firmware Update (DFU) over UART for my custom application?

Lyra 24Lyra

Answer

Ezurio provides .gbl files for AT Interface application as well as DTM FW used for regulatory test modes. However, for custom applications based on Simplicity Studio SDK a user must create their own gbl file for DFU.

Using Simplicity Studio as the IDE for development a set of binaries of format .axf, .bin. .hex and .s37 are generated but no gbl formatted files. Sample applications in Simplicity Studio provide a batch file in the project structure named create_bl_files.bat (.py and .sh provided as well).

Simply double clicking on the create_bl_files.bat will create several .gbl files. It is recommended to program the .gbl file with the -crc suffix, as this contains a CRC-32 checksum. The bootloader uses the CRC-32 to verify the firmware’s integrity both at startup and when applying a new firmware update package via the Serial DFU (UART) method.

This can now be used with the Lyra_24_USB_module_UART_DFU_v1.0.0 utility as described in the Firmware Options and Upgrade Methods Guide:

https://www.ezurio.com/documentation/user-guide-firmware-options-and-upgrading-lyra-22-24-series

Files in Simplicity Studio Project

In some cases, the create_bl_files.bat or create_bl_files.sh scripts might not be present by default. If so, you can try adding them manually by installing the Application OTA DFU component via: my_project_name.slcp → Software Components → Bluetooth → OTA.