IWR1843AOP: RunTime Calibration

Koichiro Tashiro

Part Number: IWR1843AOP

Tool/software:

Hi,

My customer wants to use RunTime calibration with below configuration.
RX_GAIN_CAL_EN=1
TX_POWER_CAL_EN=1
TX_POWER_CAL_MODE=0

Q1) Do we need to setup Lookup Table (LUT) first?
If so, please let me know how to make LUT.

Q2) Do you have an example code for RunTime calibration?

Q3) The customer wants to know how TX_POWER_CAL and RX_GAIN_CAL works.
They wants to know followings for example.
- which circuit is monitored?
- how calibration is done?
- which parameters are changed? ex. TX_BACKOFF for TX_POWER?

Thanks and regards,
Koichiro Tashiro

4 months ago

0 Abhishek Karkisaval 4 months ago

TI__Expert 8990 points

Thanks for your query. Please allow us a couple of days to respond

Regards

0 Nathan Block 4 months ago in reply to Abhishek Karkisaval

TI__Mastermind 33050 points

Hi,

For Q1 and Q3 - Please refer to the app note here.

https://www.ti.com/lit/an/spracf4c/spracf4c.pdf?ts=1725367528018&ref_url=https%253A%252F%252Fwww.google.com%252F

It states that the lookup table for the TX gain calibration is generated during the calibration, and can be modified or read afterwards.

Koichiro Tashiro said:
Q2) Do you have an example code for RunTime calibration?

Calibration is enabled in the out-of-box demo by default. For more information, see C:/ti/mmwave_sdk_03_06_00_00-LTS/docs/mmwave_sdk_user_guide.pdf

Best,

Nate

0 Koichiro Tashiro 3 months ago in reply to Nathan Block

TI__Mastermind 22180 points

Hi Nate,

Sorry for my late reply.

Nathan Block said:
Calibration is enabled in the out-of-box demo by default.

The customer checked OOB demo source code, but could not find where the calibration is done in the code.
Could you point me exact location (file and line#)?

Thanks and regards,
Koichiro Tashiro

0 Nathan Block 3 months ago in reply to Koichiro Tashiro

TI__Mastermind 33050 points

Hi,

In the SDK user guide, it states:

See this post for specifics

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1051278/iwr6843aop-how-we-verify-the-calibration-result-or-compare-the-performance-with-or-without-calibration

Code is in mmwave_link.c

Best,

Nate

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IWR1843AOP: RunTime Calibration