TIDA-00009 ref design

Swetha S

Other Parts Discussed in Thread: MSP430F5528, AFE4300

Am currently working on TIDA-00009 reference design. Instead of using the bluetooth module, am using my serial window to communicate with the device. Am not able to get the accurate weight and BCM values.. Help me!

over 11 years ago

0 Amy Schnoor over 11 years ago

TI__Mastermind 18285 points

Swetha,

Could you give more details on your problem?

0 Swetha S over 11 years ago in reply to Amy Schnoor

Prodigy 110 points

Amy,

We are developing a machine to measure weight and BCM. We are using your reference design and coding.
I have many doubts regarding the coding.
1. What is the calibration method followed by you while designing the weight scale? Is it two point calibration? After calibration also we could not get the correct weight measurement.
2. How to calibrate the BCM part.. The default values set in the program will not suit our electrodes.

0 Amy Schnoor over 11 years ago in reply to Swetha S

TI__Mastermind 18285 points

Swetha,

Have you seen our app note that goes through the calibration process using our EVM? I included the link below.

www.ti.com/.../sbaa202.pdf

0 Swetha S over 11 years ago in reply to Amy Schnoor

Prodigy 110 points

Thank u Amy for the link. I got the correct output for weight.

I will try to calibrate the BCM part..

0 Amy Schnoor over 11 years ago in reply to Swetha S

TI__Mastermind 18285 points

Swetha,

Glad we could help.

0 Swetha S over 11 years ago in reply to Amy Schnoor

Prodigy 110 points

Hi Amy
We are using the AFE4300 and MSP430F5528
we got the weight correctly
Can U please help us how to calibrate the BCM value .

We using the 100ohm and 1K as RP0 &RN0 ,RP1 & RN1
Can you please say us how to calibrate the BCM.

Waiting for your replay.

Thanks in advance

0 Amy Schnoor over 11 years ago in reply to Swetha S

TI__Mastermind 18285 points

Swetha,

Section 3 of the app note I sent in a previous reply explains how to calibrate for a BCM measurement.

0 Swetha S over 11 years ago in reply to Amy Schnoor

Prodigy 110 points

Hi Amy,

Am not asking for EVM board.

We doing separately.

So can you please help us.

0 Swetha S over 11 years ago in reply to Swetha S

Prodigy 110 points

Thanks Amy, the point is that we have also to develop our own board using the AFE4300 after using the evaluation board and it could be useful for us using the code that you have already developed.

At least do you have a driver that you can send me, just for the part of the communciation with the chip? I do not need the whole code but just the sub-vi that allows the communication with the chip.

And we need to measure the Height with MSP430F5528.

We using your TID-00009 as our reference design.

We had problem with the BCM calibration.

In evaluation board you had taken R56 and R57 resistor values as default, which is connected across RP1 & RN0(700 ohm) , RP1 & RN1(950 ohm)

But in TID design u had mentioned as 10M for both. So can you please help us.

Please help us.

Thanks in advance.

Waiting for your replay.

0 Amy Schnoor over 11 years ago in reply to Swetha S

TI__Mastermind 18285 points

Swetha,

Here is the link to request the software.

www.ti.com/.../tida010.pdf

Data converters

Data converters forum

TIDA-00009 ref design