STC3115 fuel gauge is not Working(NACK returned when I read the device id from master) and startup failed

[EEngg.1]

Hello Everyone,

We are having an issue with STC3115 (fuel gauge). We are connect Nrf51822(as Master) and stc3115 (as slave). we are read the device address from 0 to 127 . we got (I2C device found at address 0x70) from slave (stc3115) and then we read device id in the address of (STC3115_REG_ID 0x18) but we got (NACK) from slave . and then device does not startup.

Software:

1. https://github.com/st-sw/STC3115GenericDriver Library.

2.nrf51822 i2c master

Hardware:

1.sda (master-nrf51822) ->4.7k->sda(slave-stc3115)

2.scl (master-nrf51822) ->4.7k ->scl(slave-stc3115)

3.RSTO pin connect with 10k resistor (Pull Up)

My code is:

//Check I2C is working and Fuel gauge device connected

status = STC3115_CheckI2cDeviceId();

SEGGER_RTT_printf(0, "staus: %d\n", status);

if (status != 0) //error

{

if(status == -1)

{

printf(0,"STC3115: I2C error\n");

#ifdef DEBUG

//wait to simulate the whole application restart

while( GasGaugeTimerFinished() != 1);

nrf_delay_ms(1000);

goto GasGauge_Restart;

#endif

}

else if(status == -2)

printf(0,"STC3115: Wrong device detected\n");

else

printf(0,"STC3115: Unknown Hardware error\n");

return -1; //return on error

}

//----------------------------------------------------------------------

//Check Gasgauge is powered up & ready, and first measurement (V, I) is done (i.e. wait CounterValue is 3 or more)

for(i=0; i<20; i++) //check for 20*100ms = 2s

{

//CounterValue = STC3115_GetRunningCounter();

if(CounterValue >= 3) //ok, device ready

{

break; //exit loop

}

else if(CounterValue < 0) //communication Error

{

printf(0,"STC3115: Error power up.\n");

goto GasGauge_Restart;

}

else

{

//wait

Delay_ms(100);

}

}

if(CounterValue < 3) //timeout, the devise has not started

{

printf(0,"STC3115: Error power up.\n");

//goto GasGauge_Restart;

}

//----------------------------------------------------------------------

//Call STC3115 driver init&start function

status = GasGauge_Initialization(&STC3115_ConfigData, &STC3115_BatteryData);

if(status!=0 && status!=-2)

{

SEGGER_RTT_WriteString(0,"STC3115: Error in GasGauge_Initialization\n");

return -1; //return on error

}

#ifdef DEBUG

//----------------------------------------------------------------------

//Check Gasgauge is running (also checked in GasGauge_Task)

for(i=0; i<20; i++)

{

CounterValue = STC3115_GetRunningCounter();

if(CounterValue > 3) //Gas gauge COUNTER stays at value '3' after power up or Soft Reset, if not running

{

break; //exit loop

}

else

{

//wait

Delay_ms(100);

}

}

if(CounterValue <= 3) 

{

printf("STC3115: Error, GasGauge not running. Check your hardware.\n");

goto GasGauge_Restart;

}

#endif

//----------------------------------------------------------------------

while(1) //main infinite loop

{

if(GasGauge_HardwareShutDown == 1) //Completely shutdown the platform and the Gas gauge. (not recommended, it is better to let the Gas Gauge running connected to battery)

{

GasGauge_HardwareShutDown = 0;

status = GasGauge_Stop(); //stop the Gas gauge but keep its RAM content

if(status != 0)SEGGER_RTT_WriteString(0,"STC3115: Error in GasGauge_Stop\n");

#ifdef DEBUG

//wait to simulate the application is powered off for a couple of time

while( GasGaugeTimerFinished() != 1);

goto GasGauge_Restart;

#endif

return 0;

}

else if(GasGauge_UnknowError == 1)

{

GasGauge_UnknowError = 0;

status = GasGauge_Reset(); //Reset the Gasgauge without disconnecting the battery

if(status != 0) printf(0,"STC3115: Error in GasGauge_Reset\n");

goto GasGauge_Restart;

}

else //normal case

{

if(GasGaugeTimerFinished() == 1) //every 5s

{

/* if(GasGauge_ChangeLowPowerMode == 1) //switch between Voltage mode and Mixed mode

{

ChangeLowPowerMode();

GasGauge_ChangeLowPowerMode = 0;

}*/

//Call task function

status = GasGauge_Task(&STC3115_ConfigData, &STC3115_BatteryData); /* process gas gauge algorithm, returns results */

if (status > 0) //OK, new data available

{

/* printf("Battery: SoC=%i %%, Vbat=%i mV, I=%i mA, Cap=%i mAh, T=%i °C, Pres=%i ALM=%i , CCounter=%d, Time=%d s \r\n", 

STC3115_BatteryData.SOC * 0.1,

STC3115_BatteryData.Voltage, 

STC3115_BatteryData.Current, 

STC3115_BatteryData.ChargeValue,

STC3115_BatteryData.Temperature,

STC3115_BatteryData.Presence, 

STC3115_BatteryData.StatusWord >> 13, 

STC3115_BatteryData.ConvCounter, 

STC3115_BatteryData.ConvCounter * 0.5 //elapsed time since gas gauge started

);*/

 SEGGER_RTT_printf(0,"Vbat=%i mV",STC3115_BatteryData.Voltage);

}

else if(status == 0) //only previous SOC, OCV and voltage are valid 

{

printf("Battery: Previous_SoC=%i %%, Vbat=%i mV, OCV=%i mV, T=%i °C \r\n", 

STC3115_BatteryData.SOC * 0.1,

STC3115_BatteryData.Voltage,

STC3115_BatteryData.OCV,

STC3115_BatteryData.Temperature);

}

else if(status == -1) //error occured

{

if(STC3115_BatteryData.Presence == 0)

{  /* Battery disconnection has been detected */

printf(0,"STC3115 Error: Battery disconnected, or BATD pin level is over 1.61, or Vcc is below 2.7V \r\n");

}

else

{

printf("STC3115: I2C failure \r\n");

}

}

} // END Timer finished

else

{

//Do other Tasks here ...

}

} //END normal case

}//END loop

I am always Getting STC3115: Wrong device detected

What is the problem ?