BQ27220：bq27220 can not modify the design capacity ?

yancheng shen

Intellectual 265 points

Part Number: BQ27220
Other Parts Discussed in Thread: BQSTUDIO

help me to check the programe? why can not change the design capacity?

over 6 years ago

0 Onyx Ahiakwo over 6 years ago

TI__Guru* 76230 points

Yancheng

Our software expert will get back to you on this.

thanks
Onyx

0 Dominik Hartl11 over 6 years ago

TI__Guru 55826 points

replace lines 345 and 346 with:

new_checksum = 0xFF - 0xFF & (0x9F + 0x92 + txbuf[1] + txbuf[2]); //this assumes that txbuf was not modified after lines 342 and 343

data_len = 0x06; //2 bytes address, 2 bytes data, 1 byte check sum, 1 byte length = 6

0 yancheng shen over 6 years ago in reply to Dominik Hartl11

Intellectual 265 points

thanks for your response !

now i can modify the design capacity for bq27220 , the problem is need to add delay when send set data_len and checksum!

now i have new problem how to set SOC Flag Configuration A (SOC Flag Config A) Register ;

0 Onyx Ahiakwo over 6 years ago in reply to yancheng shen

TI__Guru* 76230 points

Hi Yancheng.
Can you pls spend some time to review the gauge using bqstudio and an EVM before attempting to do things on your board. This will set you on the right path and help clarify a lot of your confusion. Also, pls search the forums before posting questions as a lot of the issues you faced may have been addressed in similar interactions with other customers.
thanks
Onyx

0 yancheng shen over 6 years ago in reply to Onyx Ahiakwo

Intellectual 265 points

sorry i don't have demo board!

0 Onyx Ahiakwo over 6 years ago in reply to yancheng shen

TI__Guru* 76230 points

I advice you get one.

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BQ27220：bq27220 can not modify the design capacity ?