This tool is a reference implementation of the mechanism to update a firmware in a LR1110 / LR1120 / LR1121 chip. It is based on the Application Note AN1200.57 - "LR1110: Upgrade of the Program Memory".
This tool is developed on the ST Microeletronic NUCLEO-L476RG development board. It is a reference implementation that can be ported to another MCU.
The list of compatible Semtech LR1110 shields is:
| Shield | PCB | Frequency matching |
|---|---|---|
| LR1110MB1DIS | PCB_E655V01A - GNSS with LNA for Passive GNSS Antenna | 868/915MHz |
| LR1110MB1DJS | PCB_E656V01A - GNSS without LNA | 868/915MHz |
| LR1110MB1GIS | PCB_E655V01A - GNSS with LNA for Passive GNSS Antenna | 490MHz |
| LR1110MB1GJS | PCB_E656V01A - GNSS without LNA | 490MHz |
The list of compatible Semtech LR1120 shields is:
| Shield | PCB | Frequency matching |
|---|---|---|
| LR1120MB1DIS | PCB_E655V01A - GNSS with LNA for Passive GNSS Antenna | 868/915MHz |
| LR1120MB1DJS | PCB_E656V01A - GNSS without LNA | 868/915MHz |
| LR1120MB1GIS | PCB_E655V01A - GNSS with LNA for Passive GNSS Antenna | 490MHz |
| LR1120MB1GJS | PCB_E656V01A - GNSS without LNA | 490MHz |
The list of compatible Semtech LR1121 shields is:
| Shield | PCB | Frequency matching |
|---|---|---|
| LR1121MB1DIS | PCB_E655V01A | 868/915MHz |
| LR1121MB1GIS | PCB_E655V01A | 490MHz |
This tool is compatible with a touchscreen (DM-TFT28-116) that can be optionnaly connected on top of the shield to get information directly - without the need to open a terminal on the computer connected to the board.
This tool can be compiled with the following toolchains:
- Keil MDK ARM - Keil project file available in
apps/<example>/MDK-ARM/ - GNU Arm Embedded toolchain - makefile available in
apps/<example>/makefile/
Before starting to build an example, check the firmware header file being included in the main file, application/src/main.c.
Pre-compiled binaries are available the Wiki.
This tool is delivered with a Keil project file - see keil/lr11xx-updater-tool.uvprojx.
To build a project:
- Launch Keil IDE
- Open the project file
- Compile
This tool is built from a Makefile available in the root folder of the project.
The output files of the build process are stored in the build folder with firmware binary file having the same name as the project with a .bin extension.
To build a project, simply run make:
$ cd $LR11XX_UPDATER_TOOL_FOLDER
$ makeAfter a project is built, it can be loaded onto a device.
There are multiple ways to do it, among which:
- Drag and drop the binary file to the USB drive listed by our OS - usually shows up as
NODE_L476RG. - Load it through the Keil IDE
- A tool like STM32 Cube Programmer
As soon as the binary is downloaded, the update process begins.
The user can get information about the update status through the following interfaces:
- LEDs: an orange LED is on during the update and a green LED indicates that the update is successful (or a red LED if something went wrong)
- COM port: if there is a terminal connected to the COM port exposed by the NUCLEO board, information can be read (bitrate set to 921600 bps)
- Touchscreen (if connected): the status is displayed on the screen