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Sample code for the MAX17055 Fuel Gauge with EZ config Initialization API implemented. The MAX17055 is part of the MAX32620FTHR
Dependencies: MAX17055_EZconfig
Revision 0:bec440cb42e5, committed 2019-02-07
- Comitter:
- fneirab
- Date:
- Thu Feb 07 21:50:03 2019 +0000
- Commit message:
- This is the sample code for the MAX17055 which is included in the MAX32620FTHR.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MAX17055_EZconfig.lib Thu Feb 07 21:50:03 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/teams/MaximIntegrated/code/MAX17055_EZconfig/#2ec07d0239be
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Feb 07 21:50:03 2019 +0000 @@ -0,0 +1,97 @@ +#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); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Thu Feb 07 21:50:03 2019 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#59535b83926abb05d35f8c9b8bfbffc8a8ec25c2