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Programming the EEPROM
Posted: Thu Apr 02, 2015 7:15 pm
by dbrgn
Are there some tools in the CF2 firmware to flash the DS28E05 EEPROM on a custom expansion board?
I saw that modules/src/mem.c seems to provide that functionality. How can I use it?
Re: Programming the EEPROM
Posted: Thu Apr 02, 2015 8:23 pm
by dbrgn
Ah, found lib/cflib/crazyflie/mem.py in the crazyflie-clients-python library. Working on a commandline tool now
Re: Programming the EEPROM
Posted: Thu Apr 02, 2015 9:40 pm
by dbrgn
Here's my script to flash the 1-wire memory using CRTP:
https://github.com/dbrgn/crazyflie-clie ... -memory.py
There seems to be a problem though, it does not work yet:
https://github.com/bitcraze/crazyflie-c ... issues/166
Re: Programming the EEPROM
Posted: Tue Apr 07, 2015 11:40 am
by arnaud
Hi,
Thanks for reporting the bug!
The problem is that it is currently not possible to write the OW memories when running a BLE firmware:
https://github.com/bitcraze/crazyflie2- ... ory.c#L172
The reason is that the OW access requires hard real-time execution and the BLE stack is stealing CPU time once in a while. It is manageable but hard (OW transfers needs to be schedules between BLE activities) so it was disable and we got away with using non-ble firmware in factory to program the decks/expansion boards. We need to solve that at some point.
The solution for now is to compile and flash an NRF firmware without BLE support (make BLE=0 && make cload). If you want I can generate an update zip for you.