Hello,we have BQ78412EVM board. In the first place everything worked fine, except the bq784XX Software showed a Voltage of 12000 Volts, so I reconfigured the VoltageGain to 1007080000000,000. Now the software displays the right voltage but now I can't write any data to the registers of the bq78412. I'm able to read every value but when I send a message like this:
FF 17 24 40 E8 03 98 (This should set the desing capacity to 100Ahr)
the bq78412 respones with:
FF 21 21
which should indicate that everything worked fine. But when I read the register again the value is still the old one.
I recognized with a second bq78412 that I'm not able to write any data when the bq78412 isn't connected to a battery, so I'm wondering if there's a safety mechanism implemented which prohibits the bq78412 to write any data if the UnderVoltageThreshold flag is set. Unfortunately there's nothing about that topic mentioned in the manual.
Is there any possibility to reset all registers of the bq78412? I tried the reset button in the bq784XX software, but that just resets the SoC and a few other properties.
Here are screenshots of the values
Thanks for you help.