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Particle STM32 Bootloader

Photon/Electron

OTA

After building the bootloader, it can be flashed to the device Over-the-Air using Particle CLI.

particle flash <devicename> bootloader.bin

This takes care of unlocking the protected memory regions, flashing the bootloader, and reprotecting the memory regions.

Using the Programmer Shield

  • ensure that the environment variable OPENOCD_HOME points to the directory containing OpenOCD on your computer.

  • connect the programmer shield and start a telnet session on port 3333 as described here

  • send the openOCD commands via telnet

    reset halt
flash protect 0 0 off

  • in the bootloader directory run

    make PLATFORM=photon all program-openocd

  • finally send the telnet command

    flash protect 0 0 on