This document discusses default bootloaders for microcontrollers like PIC16F877 and ATMEGA32 and methods for programming them, including using an ISP/SPI programmer, JTAG, or SWD. It also covers writing a custom bootloader using a programmer and using DFU files or tools like dfu-util and dfuse-tool to program devices over USB. Finally, it mentions the stm32loader Python tool for erasing, writing, and verifying firmware on STM32 microcontrollers over a serial port.

2. Default Bootloader
STM32 microcontroller system memory boot mode

3. PIC16F877 ATMEGA32

4. PIC16F877 ATMEGA32 Arduino

5. AVR ISP / SPI

6. SWD?
JTAG?

8. FLASH
BOOT ROM
ALIASED

13. Если есть дефолтовый бутлоадер
— зачем писать свой?
USECASES

14. A)
Да, можно прошить свой бутлоадер
программатором, и его юзать.

15. B)

16. C)

21. DFU(se) File:

22. dfuse-tool
$ ./dfu-convert -i ~/…/Debug/
d4_blinker.hex d4_bl1.dfu
$ dfu-util -l
$ dfu-util -a 0 -d 0483:df11
-D d4_bl1.dfu

23. dfuse-tool
$ dfu-util -a 0 -d 0483:df11
-D d4_bl1.dfu
STMicroelectronics USB VID
“DFU”
Alt.set. ?
0 - for main flash

24. 1) arm-none-eabi-objcopy -O binary "${BuildArtifactFileBaseName}.elf" "${BuildArtifactFileBaseName}.bin"
2) && arm-none-eabi-objcopy -O ihex "${BuildArtifactFileBaseName}.elf" "${BuildArtifactFileBaseName}.hex"
3) && arm-none-eabi-size "${BuildArtifactFileName}"
arm-none-eabi-objcopy -O ihex

26. STM32 Flash loader
demonstrator (UM0462)

27. stm32loader
$ ./stm32loader.py -e -w -v -p /dev/ttyUSB0 bluepill.bin
Bootloader version 22
Chip id: 0x410 (STM32 Medium-density)
Write 256 bytes at 0x8000000
...
Read 256 bytes at 0x8000D00
Verification OK
$

28. stm32loader
$ ./stm32loader.py -e -w -v -p /dev/ttyUSB0 bluepill.bin
erase
write verify
port

29. OpenSource
dfu-util
dfuse-tool
stm32-loader

31. ВСЁ