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Flashing STM32 over SWD

An SWD programmer such as an ST-LINK writes firmware straight to flash over the SWD pins. It does not use the ROM bootloader, so BOOT0 and the bootloader UART are not involved.

GUI — STM32CubeProgrammer​

  1. Launch STM32CubeProgrammer.
  2. Select the ST-LINK connection.
  3. Click Connect.
  4. Open the firmware-<target>-X.X.X.xxxxxxx.bin file and confirm the start address is 0x08000000 (the default).
  5. Click Download.
note

If your ST-LINK's nRST pin is not connected to the board's nRST, set Reset mode to Software reset or Core reset instead of Hardware reset in the ST-LINK settings.

CLI​

STM32CubeProgrammer, nRST connected​

STM32_Programmer_CLI -c port=SWD mode=UR -w firmware-<target>-X.X.X.xxxxxxx.bin 0x08000000 -v -rst

-v verifies the write and -rst restarts the board into the new firmware.

STM32CubeProgrammer, nRST not connected​

STM32_Programmer_CLI -c port=SWD mode=HOTPLUG -w firmware-<target>-X.X.X.xxxxxxx.bin 0x08000000 -v -rst

OpenOCD​

openocd -f interface/stlink.cfg -f target/stm32wlx.cfg -c "program firmware-<target>-X.X.X.xxxxxxx.bin 0x08000000 verify reset exit"