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Basic Loader

Basic Loader is an update-capable bootloader that supports the unpacking and installing of new firmware on an end-device.

Basic MAC uses this component to load its firmware, and to support firmware updates over-the-air (FUOTA).

Building Basic Loader

The reference hardware platform for Basic Loader is the B-L072Z-LRWAN1 STM32 LoRa™ Discovery kit.

Prerequisites

It is recommended to use a recent Ubuntu distribution as build host with the gcc-arm-embedded package installed.

To build the bootloaders for all supported platforms, simply run make in the toplevel directory.

Alternatively, change into a specific target board's build directory and run make there:

cd build/boards/B-L072Z-LRWAN1
make

The output of the build process is a file named bootloader.hex that can be loaded onto the B-L072Z-LRWAN1 development board. If there is no valid firmware installed, the LED LD2 will be flashing the corresponding error sequence (SYNC-2-2-1).

Release Notes

Release 4

16-Jan-2020

  • Support for LZ4 in-place delta updates
  • Bugfix: Flash writing routines
  • Improved readability of LED blink sequence
  • Option to blink LED during update process
  • Improved out-of-tree build support
  • Improved ZFW (firmware patching) tool

Release 3

01-May-2019

  • Bootloader for STM32 makes SHA-256 function available to firmware
  • New ZFW-tool creates firmware archives with metadata
  • Changed linker scripts to work around a recent regression in GNU ld
  • Bugfixes

Pre-release 2

15-Jan-2019

  • Bootloader for STM32 makes Flash-write function available to firmware

Pre-release 1

07-Jan-2019

  • Verifies and loads firmware
  • Tool for patching firmware image header
  • Support for plain updates

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