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Hi there, I have no virtualized Windows so I am trying to flash the bootloader with openocd: openocd -f stm32f4discovery.cfg -c "program project.bin exit" I get following output: Open On-Chip Debugger 0.9.0 (2015-11-28-15:54) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD adapter speed: 2000 kHz adapter_nsrst_delay: 100 none separate srst_only separate srst_nogate srst_open_drain connect_deassert_srst Info : Unable to match requested speed 2000 kHz, using 1800 kHz Info : Unable to match requested speed 2000 kHz, using 1800 kHz Info : clock speed 1800 kHz Info : STLINK v2 JTAG v14 API v2 SWIM v0 VID 0x0483 PID 0x3748 Info : using stlink api v2 Info : Target voltage: 2.891327 Info : stm32f4x.cpu: hardware has 6 breakpoints, 4 watchpoints target state: halted target halted due to debug-request, current mode: Thread xPSR: 0x01000000 pc: 0x0800637c msp: 0x20000c78 ** Programming Started ** auto erase enabled Info : device id = 0x10036413 Info : flash size = 1024kbytes Warn : no flash bank found for address 0 wrote 0 bytes from file project.bin in 0.001464s (0.000 KiB/s) ** Programming Finished ** shutdown command invoked I guess I need an offset, but how large? Thanks and best regards, Uli The following seems to work: openocd -f stm32f4discovery.cfg -c "program project.bin exit 0x08000000" At least it doesn't throw an error. But it shows up as "Van Ooijen Technische Informatica". Isn't this weird?