On 2 May 2012 13:44, Gerd v. Egidy <li...@egidy.de> wrote: > Hi Mathias, > >> i think it's a initializing problem of the cpu and not a communication >> problem. The TAPID is correct received from STLINK but all memory read >> fails. >> >> Is the problem is gone if you press the on-board reset button? >> Is your firmware always crash? If so try to hold the reset button and >> reconnect. > > I think now we are getting somewhere! Thanks a lot for your hint. I did some > test and these are the results: > > - my firmware on stm32f4, openocd, "reset_config srst_only", started with > "reset" or "reset halt" -> read errors > - my firmware on stm32f4, openocd, "reset_config srst_only srst_nogate", > started > with "reset" or "reset halt" -> read errors > - my firmware on stm32f4, openocd, "reset_config srst_only", started with > "reset" or "reset halt", hardware reset button helt down during start of > openocd, then released after openocd is initialized -> working > - my firmware on stm32f4, stlink utility on windows -> working > - default demo firmware on stm32f4, openocd, "reset_config srst_only", started > with "reset" or "reset halt" -> working > > So I conclude there are two problems at play: > > - the firmware on the stm32f4 has to "play well" with swd. Maybe some kind of > initialisation is needed that I'm missing. >
strange, using reset_config srst_only srst_nogate should give you the ability of recovering from misbehaving firmware. Are you sure you added the patch to the code aswell? Spen ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ OpenOCD-devel mailing list OpenOCD-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openocd-devel
