Compiler/BQ35100: BQ35100 getting started

Suyodhana,

That document you are referencing is the best thing we provide. What i recommend is use bqStudio advanced comm screen to verify the reads and registers you should be getting. 

I will note when dealing with micor controllers the address of 0xAA is often not correct because most expect a right shift. please try to use 0x55 instead. 

I should not be doing this but here is a very basic "Gauge Start" command function using the TI TIVA C micro controller. 

//Send Gauge Start Command
void gaugeStart() {
Serial.println("Gauge Start CMD");
Wire.beginTransmission(0x55);
Wire.write(0x3E);
Wire.write(0x11);
Wire.write(0x00);
Wire.endTransmission();
return;
}

Here is an example of a read that is 2 bytes long

uint16_t read16bit_fromGauge(int adrs, int command) {

//Write address before the read
Wire.beginTransmission(adrs);
Wire.write(command);
Wire.endTransmission(false);

uint16_t val = 0;
int count = 2;
Wire.requestFrom(adrs, 2); // request 2 bytes from slave device
while (Wire.available()) // slave may send less than requested
{
uint16_t c = Wire.read(); // receive a byte as character
if (!--count)
{
c <<= 8;
}
val |= c;
}
return val;
}

From here i will be unable to provide further code or debug the example provided. If you are unable to get the correct result using bqstudio i can assist there.

Thanks,

Eric Vos