[Gnuk-users] Can't erase FS-BB48 using openOcd

[Florian Uekermann]

Hi everyone,

I have a small problem with chopstx and FS-BB48. Apologies if this is 
the wrong list, it is the most fitting place I could find. If not it 
would be great if you could point me to a suitable list.

First off, I have an FS-BB48 running with chopstx and the sample 
application. Serial interface, LED blinking, touch button are all 
working fine. I use openocd for flashing and on a new device flashing 
works fine using "openocd -f interface/stlink-v2.cfg -f target/klx.cfg" 
with the "flash write_image" command.

The problem is that I can only flash the firmware once, since I can not 
erase the flash memory. For example the command "flash erase_sector 0 0 
15" returns:
 > erase sector 0 failed
 > failed erasing sectors 0 to 15
 > in procedure 'flash'
I also tried "(gdb) monitor kinetis mdm mass_erase" fails with the message:
 > Cannot perform mass erase with a high-level adapter in procedure 'flash'
Memory protection is off for all sectors. I tried using kl25z.cfg, with 
identical results.
Should I use different hardware than the ST-Link/V2 (I was under the 
impression that Niibe used it successfully in the past, so that is what 
I tried)?

Any help/hints referrals are appreciated.

Best regards,
Florian