Hi
I am using BQ34Z100EVM and Arduino Uno like master I2c device. I am trying to change some settings in Data Flash (Pack Configuration
, Number of series cell...) and i can to write new checsum. I tried in several ways to calculate newchecksum but controller does not accept.
i using the 4cell battery (3.7V to 4.2V per cell) and this is a list of commands that I send :
(writte 0x00 , 0x14, 0x04)
(writte 0x00 , 0x72, 0x36)
delay(300) /////miliseconds
(writte 0x61 , 0x00)
(writte 0x3E , 0x40)
(writte 0x3F , 0x00)
delay(300)
for (int i=0 ; i< 32; i++)
{
flashbyte[i] =(read 0x40+i);
delay(100);
}
packConfg = flashbyte[0] | 0b1000;
(writte 0x40, packConfg)
for (int i=0 ; i< 32; i++)
{
newchecksum =newchecksum + flashbyte[i];
}
Temp = newchecksum / 256 //integer divider
newchecksum = newchecksum - (Temp * 256)
newchecksum = 255 - newchecksum
(write 0x60 , newchecksum)
(write 0x00 , 0x41 , 0x00) //reset
(read 0x08) // voltage read
(read 0x60) //read Check sum
After these steps I get read the following values:
Voltage = from 695 to 715
newchecksum = 81 Decimal
checksum = 89 Decimal
Please help :)
