How to use the driver

UM1836

12/16

DocID027146 Rev 1

4.3

Periodic update of the battery state

Call the GasGauge_Task function when battery information is needed. Normally this is

every

1

to

30

seconds

(no

frequency

accuracy

is

needed).

Transfer

the

STC3115_ConfigData_TypeDef

structure

and

the

STC3115_BatteryData_TypeDef

structure to the GasGauge_Task function.

The GasGauge_Task function:

•

Uses the STC3115_ConfigData_TypeDef structure in case the STC3115 has to be

initialized again.

•

Fills the STC3115_BatteryData_TypeDef structure with the STC3115 algorithm results

(which returns the battery state to the application).

GasGauge_Task function

•

Check the state of the STC3115, the battery, and the application

•

If the battery is ok, update the current battery data

•

Battery state information is returned

GasGauge_Task returns

•

(-1) indicates that the STC3115 cannot be assessed. In other words, the I

busy, the STC3115 is not power supplied, or the BATD/CD pin is in high level state.

•

(0) indicates that only the battery SOC, voltage, and OCV data are available

•

(1) indicates that all STC3115_BatteryData_typeDef data are available

4.4

Stopping and resetting the STC3115

1.

Call the GasGauge_Stop function during the application switch off sequence. This

stops the STC3115 and saves energy which, in turn, helps recover the battery context

during the next GasGauge_Initialization function.

2.

Do not use the GasGauge_Reset function by default. This function should only be

called in abnormal use cases.