File content as of revision 0:bec440cb42e5:

#include "mbed.h"
#include "max17055.h"


//LED indication
DigitalOut rled(LED1);

//I2C communications
I2C i2cBus(P5_7, P6_0);

//Fuel Gauge
MAX17055 fuelGauge(i2cBus);
MAX17055::platform_data design_param;
MAX17055::saved_FG_params_t saved_param;

//MAX77650 PMIC
#define POWER_HOLD_ON 1
#define POWER_HOLD_OFF 0

DigitalOut pw_Hold(P2_2, POWER_HOLD_ON); //To enable battery operation from the PMIC

//Battery Parameters Storage from the Fuel Gauge MAX17055
union max17055_u {
    struct battery {
        uint8_t avg_soc_FG;     // in Battery Percent
        float tte_FG;           // in seconds
        float ttf_FG;           // in seconds
        int avg_vcell_FG;       // in 78.125uV per bit
        float avg_curr_FG;      // in uAmps
        float curr_FG;          // in uAmps
        int rep_cap;            // in mAh
        int rep_SOC;            // in %
    } battery;
} max17055_u;


int main(void)
{
    rled = true;
    //These are the calculated parameters for rsense 5mOhm found in the MAX32620FTHR and a 350mAh Li+ Cell.
    design_param.designcap  = 0x015E;  //Design Battery Capacity mAh thic can change depending on the batteries implemented see battery data sheet for details.
    design_param.ichgterm  = 0x0070;  // Charge Termination Current for the Battery This is specified by the manufacturer.
    design_param.vempty  = 0x9600;  // 3V Battery Empty Voltage This is sepecified by design, but manufacturer has a min Empy voltage specification.
    design_param.vcharge  = 4200;  // 4.2V Battery Charge Voltage can be obtained from MAX77650 configuration
    design_param.rsense = 5; //5mOhms for MAX32620, keep in mind the MAX17055EVKIT has a 10mOhm resistor. This is a design specific value. Used Rsense for resgiter calculation results.

    //Saved Parameters
    //saved_param.cycles = 0; //This value is used for the save parameters function.

    int status; // stores return value of the status of setting up the MAX17055
    MAX17055::Registers_e array_addresses[7] = {MAX17055::MODELCFG_REG,
            MAX17055::DESIGNCAP_REG,
            MAX17055::FULLCAPNOM_REG,
            MAX17055::DPACC_REG,
            MAX17055::DQACC_REG,
            MAX17055::VEMPTY_REG,
            MAX17055::ICHGTERM_REG
                                               };

    status = fuelGauge.init(design_param);
    printf("Init FuelGauge Function Status= %X \r\n",status); // Status shoudl retun Zero if the are no issues with the initialization. 

    if (status == 0)
        fuelGauge.save_Params(saved_param);

    //Read DesignCap, Ichagterm, Vempty, dqacc, dpacc, MODELCFG, FullCapNom to verify values correspond to the expected stored Values.
    // FullCapNom[mAh] = (dqacc[mAh]/dpacc[%])*100%
    uint16_t regValue[7];
    for(int i = 0 ; i < 7 ; i++) {
        regValue[i] = fuelGauge.get_regInfo(array_addresses[i]);
        printf("%X"  ,regValue[i]);
        printf(" ");
    }
    rled = false;
    wait(2);

    while (1) {
        //This code is an example to ilustrate the performance or the Fuel Gauge. This can change with the design requirements. Use this as a way to troubleshoot the FuelGauge.
        rled = !rled;

        max17055_u.battery.avg_vcell_FG = fuelGauge.get_avgVcell();
        max17055_u.battery.avg_curr_FG  = fuelGauge.get_AvgCurrent(design_param);
        max17055_u.battery.curr_FG      = fuelGauge.get_Current(design_param);
        max17055_u.battery.rep_cap      = fuelGauge.get_battCAP(design_param);
        max17055_u.battery.rep_SOC      = fuelGauge.get_SOC();
        
        //This code should work with Arduino Serial Plotter to visualize data
        printf("%f " ,(max17055_u.battery.avg_vcell_FG/1000000.0)); //V
        printf("%f " ,max17055_u.battery.avg_curr_FG);              //uA
        printf("%f " ,max17055_u.battery.curr_FG);                  //uA
        printf("%d " ,max17055_u.battery.rep_cap);                  //mAh
        printf("%d " ,max17055_u.battery.rep_SOC);                  //%
        printf("\n");

        wait(1);
    }
}