Hi Uwe. On Tue, 13 Jan 2015 17:28:55 +0100, Uwe Bonnes wrote: > It seems that openocd can't put an empty device into halt.
My STM32F427 gets halted OK, otherwise I would not be able to issue a 'reg' command. Have you tried running OpenOCD as server and then telnet into it ? I believe that you might be experiencing the missing 'unlock sequence' problem, so that your FLASH_OPTCR may contain 0x00aaaae1 instead of 0x0fffaaed. Try ... in window #1: $ openocd -f board/stm32f4discovery.cfg in window #2: $ telnet localhost 4444 # first try dumping the first 16 FLASH registers: > mdw 0x40023c00 16 # then have a look at the FLASH_OPTCR register: > mdw 0x40023C14; mdw 0x40023C10 0x40023c14: 00aaaae1 0x40023c10: 00000000 # If the FLASH_OPTCR register contains 0x00aaaae1 like above, then you need to unprotect your Flash-memory, this can be done using the following sequence: > mww 0x40023C08 0x08192A3B; mww 0x40023C08 0x4C5D6E7F; mww 0x40023C14 > 0x0fffaaed; mdw 0x40023C10 0x40023c10: 00000000 # Finally, check the new register contents: > mdw 0x40023C14; mdw 0x40023C10 0x40023c14: 0fffaaed 0x40023c10: 00000000 # and exit OpenOCD > shutdown It should now be possible to program your device. Love Jens ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ OpenOCD-devel mailing list OpenOCD-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openocd-devel
