The purpose of this project is to leverage mavlink file transfer protocol in order to flash new program into STM32. In this example, i use USART as the physical layer to transmit mavlink package. In the future, i will try on ethernet,Canard to alter usart.
- Arm-gcc
- STM32F411RE Nucleo Board
- 512kb FLASH - 8 sectors
- USART2
- Systick
- Bootloader is ~9Kb with
-Osoptimazation
| Address | Sector | Program |
|---|---|---|
| 0x0800 0000 | Sector 0 | Bootloader |
| 0x0800 4000 | Sector 1 | Bootloader |
| 0x0800 8000 | Sector 2 | Bootloader |
| 0x0800 C000 | Sector 3 | Side app |
| 0x0801 0000 | Sector 4 | Side app |
| 0x0802 0000 | Sector 5 | Side app |
| 0x0804 0000 | Sector 6 | Main app |
| 0x0806 0000 | Sector 7 | Main app |
Bootloader program will be placed in 48Kb section, Side app is in 208 Kb section and Main app is in 256Kb section
The project is written by STM32CubeIDE, so its recommended to use STM32CubeIDE.
- Complete
port.cto match your hardware - Modify
ll_serial.cto use your desired usart device - Modify
ll_flash.cto match your flash requirement - Build and upload to your hardware
If you wish to change the address of bootloader please modify MEMORY section in ./STM32F411RETX_FLASH.ld and change VECT_TAB_OFFSET in ./Core/Src/system_stm32f4xx.c
In Example folder contains example for main app and side. If you wish to modify application address, follow above steps.
- 5 second at boot, waiting for mavlink ftp create file message, LED will blink at 1 Hz.
- 3 second at final stage, LED will blink at 0.2 Hz to indicate readiness to launch program
- If upload is progess, Timeout is 5 seconds, LED will blink at 0.5Hz
The example of uploader is in script folder.
Run python3 ./script/uploader.py -h for more information
Feel free to help my project.