MAX17043 I2C communication

Questions » MAX17043 I2C communication

Peter Augustin

7 years, 5 months ago.

Hello, Do You have an experience with IC MAX17043 ? It is a battery fuel gauges and I try to communicate with its through I2C. I have wrote a simple code by using library MAX17043 but it does not work correct. It returns incorrect values such as below.

MAX17043

#include "mbed.h"
#include "USBSerial.h"
#include "MODSERIAL.h"
#include "MAX17043.h"

DigitalOut LedStatus(P0_13);
DigitalOut LedBattery(P0_14);
MAX17043 battery(P0_5, P0_4, 36);


USBSerial usb;
MODSERIAL uart(P0_19, P0_18);
InterruptIn timepulse(P0_17); 


void rxCallback(MODSERIAL_IRQ_INFO *q) {
    LedBattery = !LedBattery;
    
    usb.putc(uart.getc());
     
}

    
void toogle(){
    LedStatus = !LedStatus;
}

int main(){
   
   battery.selfInit();
   battery.reset(); 
     
    timepulse.rise(&toogle);
    uart.baud(9600);
 //   uart.attach(&txCallback, MODSERIAL::TxIrq);
   // uart.attach(&rxCallback, MODSERIAL::RxIrq);
 //   uart.attach(&txEmpty, MODSERIAL::TxEmpty);
      while(1){
          wait(1);
        
          float volt = battery.getFloatVCell(true);
          float soc = battery.getSOC(true);
          usb.printf("SOC: %f\r\n", soc);
          usb.printf("Voltage: %f\r\n", volt);
          
          }  
    
}

/media/uploads/bibibo/screenshot_from_2016-12-18_23-53-53.png /media/uploads/bibibo/gps.pdf

1 Answer

Gert Lauritsen

7 years, 5 months ago.

It really doesnt make sence just to publish the main module. If you want to to look into it, you have to see en the libery

If you like the soc value en %, you have to ude thes floatsoc funktion or divide the result with 256

Hello, okay, here is link for modules. It is made by Mark Gottscho. I found any problem in those modules.

https://developer.mbed.org/users/mgottscho/code/SensorsLib/

posted by Peter Augustin 19 Dec 2016

Hello, I tried code below with the same result. It does not work correct. I think connection of MAX17043 is ok because i tried I2C scanner and it came back address 0x36.

code

#include "mbed.h"
#include "USBSerial.h"
#include "MODSERIAL.h"
#include "MAX17043.h"

const int address = 0x36;
//#define vcell (0x02)
//#define command (0xFE)
//#define command_reset (0x5400)
//#define quick_start (0x4000)
//#define soc (0x04)
DigitalOut LedStatus(P0_13);
DigitalOut LedBattery(P0_14);


I2C battery_manager(P0_5, P0_4);

USBSerial usb;
MODSERIAL uart(P0_19, P0_18);
InterruptIn timepulse(P0_17); 


void rxCallback(MODSERIAL_IRQ_INFO *q) {
    LedBattery = !LedBattery;
    
    usb.putc(uart.getc());
     
}

    
void toogle(){
    LedStatus = !LedStatus;
}

int main(){

   char data_read[2];
   char cmd[2];
  
   battery_manager.frequency(400000);
   
   cmd[0] = 0x00;
   cmd[1] = 0x54;
   
   battery_manager.write(address, cmd, 2);
   
    cmd[0] = 0x4000;
   
   battery_manager.write(address, cmd, 1);   
     
    timepulse.rise(&toogle);
    uart.baud(9600);

      while(1){
          wait_ms(1000);
        
          cmd[0] = 0x04;
         
          battery_manager.write(address, cmd, 1, true);
          battery_manager.read(address, data_read, 2, true);
       
          usb.printf("soc1 %d\r\n", data_read[0]);
          usb.printf("soc2 %d\r\n", data_read[1]);
         
          }  
    
}

posted by Peter Augustin 21 Dec 2016

Peter Augustin

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7 years, 5 months ago.