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2pin control using bqevsw for bq34z100

ALAN WRIGHT1
Prodigy 140 points
Other Parts Discussed in Thread: BQ34Z100

Hi

I'm hoping to use the bq evaluation software (v 0.9.90)  to automatically control the  charging/ relax/ discharging of my battery for calibration purposes.  I am using I2C.

I can control the VOUT on the I2C output via the autocycle->2 Pin ->Enable Load (I2C VOUT = 5V)

but i cannot control the HDQ terminal. via autocycle->2 Pin ->Enable Charger (I2C SDA = 5V)

the HDQ should be controlled by this function as described in the Hardware setup Help file.

"The HDQ pin is used instead of I2C-SDA when I2C-SDA is used for communication
with the gas gauge. The "Autocycle" menu has a "2 pins" submenu that shows exactly
which pin us used to control the Charger for the currently selected target."

there is always a 3v3 voltage on the HDQ pin no matter what which option i select to control the charger.

should the option to control the charger be HDQ ?

just want to check that this funtion works or that i've got a faulty unit.

Thanks

Alan

  • 0
    TI__Guru 57697 points

    Alan,

    It appears that the bq evaluation software is incorrectly configured.

    The autocycle pins are selected based on entries in the bq34z100*.ini files. Substitute the firmware version number in place of *

    For HDQ pin you will need to add the following two lines as is if they don't already exist

    [AutoCycle]
    ChgPin=2

    If the entries already exist then change them  to match the above.

    The menu shows HDQ instead of I2C-SDA after this configuration change.

  • 0 in reply to Shirish
    Prodigy 140 points

    thanks. that done it.