Stm32f4discovery - OpenOCD - telnet uploading demo program

Question

I have problem trying to upload demo program into fresh stm32f4discovery board, this is what i'm doing:

1. Connect board to computer
2. openocd -f board/stm32f4discovery.cfg

3. telnet localhost 4444

   Open On-Chip Debugger
   > reset init
   target state: halted
   target halted due to debug-request, current mode: Thread 
   xPSR: 0x01000000 pc: 0xfffffffe msp: 0xfffffffc
   > flash write_image demo.hex       
   device id = 0x10016413
   flash size = 8192kbytes
   flash write algorithm aborted by target
   error executing stm32x flash write algorithm
   flash memory write protected
   flash write failed = 00000010
   error writing to flash at address 0x08000000 at offset 0x00000000
   in procedure 'flash'
   

   What am I doing wrong ? I've tried flash protect, stm32f2x unlock but response is still the same: 'flash memory write protected', i've missed something ? I'm using pre-compiled demo program from st.com from package 'STM32F4-Discovery_FW_V1.1.0' from 'Project/Demonstration/Binary'.

Answer 1

Flash memory must be deleted before you rewrite it.

monitor flash protect 0 0 11 off
monitor flash erase_address 0x08000000 0x40000
monitor flash write_image erase *"/path/to/hex/file.hex"* 0 ihex

Or instead of telnet and hex files, use arm-none-eabi-gdb and ELF with the following commands:

arm-none-eabi-gdb
target remote localhost:3333
monitor reset halt
file */path/to/elf/file.elf*
load
monitor reset
continue

Note that when using ELF files, you do not need to specify the address where it will be (usually 0x08000000 or 0x08008000 with bootloaders).

Also, consider using a bootloader like OpenBLT, it will help you to master the principles like VTOR, offsets, stack addresses etc.