MSP430FR6047: MCU018

Anup Kumar

Prodigy 250 points

Part Number: MSP430FR6047

Tool/software:

Hi,

What If I enables #ifdef USS_APP_AGC_CALIBRATE_ENABLE in code.

where it can impact my calculation of time of flight?

Regards,

Anup Kumar

over 1 year ago

0 Helic Chi over 1 year ago

TI__Mastermind 25918 points

Let's waiting for the USS expert to answer this question.

0 Cash Hao11 over 1 year ago

TI__Mastermind 46765 points

Hi,

The AGC(auto gain calibration) function is used to calibrate the PGA gain setting to always keep the maximum ADC capture signal level at a certain number. It does not directly impact the calculation of TOF.

Best regards,

Cash Hao

0 Anup Kumar over 1 year ago in reply to Cash Hao11

Prodigy 250 points

Thanks for your reply,

So, can I use this at run time when I am calculating the Flow rate?

Also, I have seen in the code if you are measuring the flow rate at say every 1 second and if I set calibration interval to 60, then does it mean that after every 1 minute it will calibrate/adjust the gain?

In code it is hard coded that 3dB value of 2^11 (12-bit ADC) that is around 1449. Is this value works as reference point for AGC gain calibration?

Regards,

Anup Kumar

+1 Cash Hao11 over 1 year ago in reply to Anup Kumar

TI__Mastermind 46765 points

Hi,

You can use it at run time.

And yes, it means calibrating every 1 minute. You can decide the interval as you needed.

For 3rd question, you can refer to below image.

Best regards,

Cash Hao

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MSP430FR6047: MCU018