MSP430g2212 USI i2c master mode ,interface with bq27510-G2

raghu ramaraj1

Other Parts Discussed in Thread: MSP430G2212, BQ27510-G2, BQ27410-G1

hi,

I am interfacing MSP430g2212 controller with bq27510-G2 fuel gauge through USI-i2c master mode.
I have taken an example code from "http://processors.wiki.ti.com/index.php/I2C_Communication_with_USI_Module"

Based on that ,I have added 16bi read/write API .
If i try to get DEVICE_TYPE from fuel gauge, i am getting always 0xFF10. But if the datasheet of "fuel gauge" says , DEVICE_TYPE like 0x0510 should get.

CRO CAPTURED I2C (PLS ref attached wave form & Code)

S 0xAA A 0x00 A 0x01 A 0x00 A S 0xAB A 0x10 A 0xFF A P

Code snaps:

if(write_reg16(0x00, 0x0001) != TRUE)
{
__no_operation(); // for debugger
}
dataX=0;
// read out DOUTZ register
if(read_reg16(0x00, &dataX) != TRUE)
{
__no_operation(); // for debugger
}

Queries:

1) I would like to know whether i am getting right thing or wrong.
2) Is there any possible ways to test the driver ?

Thanks& Regards
Raghu Ramaraj

over 10 years ago

0 Tyler Witt over 10 years ago

TI__Expert 5465 points

Raghu,

Firstoff, I cannot find your code attached to your post. Can you please retry attaching it? I cannot tell what the code is attempting to do from the snippet within your post. The wave form is mildly helpful, but without hex values to the packets, it is a bit difficult to comprehend.

Secondly, although I have not worked with the BQ27510-G2 itself, it is very similar to the BQ27410-G1, which I have worked with. I would like to point you to an application note that I worked on some time ago. A portion of it deals with how to interface and communicate with the BQ27410-G1 directly. The link to the note is below.

http://www.ti.com/lit/an/slaa529a/slaa529a.pdf

Hopefully this document will be of some help to you.

0 raghu ramaraj1 over 10 years ago in reply to Tyler Witt

Intellectual 530 points

Tyler Witt

Thanks you for your response. I have referred the code from ,"http://processors.wiki.ti.com/index.php/File:USI_Example.zip" . There i added only 16bit read/write.

Pls find the attached code ..

Regards

Raghu Ramaraj

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MSP430g2212 USI i2c master mode ,interface with bq27510-G2