I am using a 5100 mAh Li-ion battery pack connected to the load setup which has a DS2782 IC on board. I flashed the fuel gauge parameters into these registers (address 60h-7Ah). These values are supposed to be written into the EEPROM automatically.
These are the values flashed to algorithm
We are able to read back these values from the register. We were also able to verify that aging scaler and accumulated current register are updated in the EEPROM.
The issue I am facing is that even though I flashed the fuel gauge parameters into the in-built EEPROM, when reading from the RARC (Remaining active relative capacity) and RSRC (Remaining standby relative capacity) registers, I am getting value as 0. Not quite sure what is wrong.
These are the logs.
I (1629754) DS2782: DS2782 voltage read success
I (1629754) I2C: Voltage VALUE is:3.947920
I (1629754) DS2782: DS2782 current read success
I (1629754) DS2782: Current REG value1: 0x0h
I (1629754) DS2782: Current REG value2: 0x10h
I (1629764) DS2782: Current RAW value: 10
I (1629764) I2C: Current VALUE is: +2.500000 ma
I (1629774) DS2782: DS2782 Param read success
I (1629774) I2C: RSNSP VALUE 0x64h
I (1629784) DS2782: DS2782 Param read success
I (1629784) I2C: VCHG REG value: 0xd5h
I (1629794) I2C: VCHG value: 4.157760
I (1629794) DS2782: DS2782 Param read success
I (1629804) I2C: IMIN REG value: 0x1fh
I (1629804) I2C: IMIN value: 155.000000
I (1629814) DS2782: DS2782 read success
I (1629814) DS2782: Capacity raw value:0
I (1629824) I2C: RARC:0 %
I (1629824) DS2782: DS2782 read success
I (1629824) DS2782: Capacity raw value:0
I (1629834) I2C: RSRC:0 %
I (1629834) DS2782: DS2782 Param read success
I (1629844) I2C: Aging scalar: 80
I (1629844) DS2782: DS2782 Param read success
I (1629854) I2C: control REG VALUE 0x0h
I (1629854) DS2782: DS2782 Param read success
I (1629864) I2C: status REG VALUE 0x61h
I (1629864) DS2782: DS2782 FULL cap read success
I (1629864) DS2782: FULL CAP REG value1: 0x7fh
I (1629874) DS2782: FULL CAP REG value2: 0xcah
I (1629884) I2C: FULL CAP REG VALUE 0x7fcah
I (1629884) I2C: FULL CAP VALUE 29474
I (1629884) DS2782: DS2782 RAAC read success
I (1629894) DS2782: RAAC REG value1: 0x0h
I (1629894) DS2782: RAAC REG value2: 0x0h
I (1629904) I2C: RAAC REG VALUE 0x0h
I (1629904) I2C: RAAC VALUE 0
For initial first time charge, do we need to complete one charge cycle for DS2782 to show RARC and RSRC.
How to know state of the battery if replaced with a different battery?
Any help would be appreciated.
We followed the following link to calculate the parameters: https://www.stg-maximintegrated.com/en/design/technical-documents/app-notes/3/3584.html
I am attaching a snippet of the schematic and the values that I am flashing for reference.
