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Problems writing Data Flash BQ3060

Novak Krk
Prodigy 80 points
Other Parts Discussed in Thread: BQ3060

Hi Community,

I am trying to write via the SMBus the Data Flash of the BQ3060 Gas Gauge because I have to set a few parameters different as default settings. 

For example I would like to change the high byte bit CC1 and CC0 to 0 and 1( Register Operation Cfg A)  to configure for two cells ( default is for 3 cells).


But for me the structure how to write or read the data flash of the BQ3060 is unclear.

I read the chapter Data Flash from http://www.ti.com/lit/ug/sluu319/sluu319.pdf page 89. There I also found a example ( Page 90) for writing to Data Flash but i don't understand it exactly.

Can anyone please give me an exact instruction step by step how to write data to the flash of BQ3060 via SMBus ( my microcontroller which is the the Master is an Atmel Mega88).

Kind regards!

Novak Krk

  • 0
    Prodigy 80 points

    Hello,

    Can't  nobody help me to write to the data flash of the bq3060?

    I think now I am able to read the data flash I do it like this:

    start

    write Slave Address (0x16)

    then command DataFlashSubClassID (0x77)

    then for example first lowbyte 0x40 (Register Cfg A )

    then high byte 0x00

    and stop

    now read out:

    Start

    write Slave Address (0x16)

    then command DataFlashSubClassPage1..8 (0x78)

    Start

    read Slave Address (0x17)

    low byte

    high byte

    Nack

    stop

  • 0 in reply to Novak Krk
    Prodigy 80 points

    Hello again,

    I Changed my function into:

    void ReadBalancer (void)

{
  //unsigned int WertHighByteb,WertLowByteb,WertGesamtb ;

  smb_start_wait(AdresseSlave_1+SMB_WRITE);
  smb_write(0x77);
  smb_write(0x40);
  smb_write(0x00);
  smb_stop();

  _delay_us(100);

  smb_start_wait(AdresseSlave_1+SMB_WRITE);
  smb_write (0x78);
  smb_rep_start(AdresseSlave_1+SMB_READ);
  smb_readAck();                             //number of bytes receiving from slave

  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readAck();
  smb_readNak();
  smb_stop();



}

    I get 10 Bytes from the Slave but the Data is not that what I expected. 


    Where is my mistake? Please help me!