Hi Melvin,

Assigning an expert to comment.

Hi,

Case 1: This kind of results is generally due to the test's environment. For example, does the table have some metallic parts? This could be very annoying for AoA. If so, I recommend you to change the test's environment. In addition, you can try to elevate a bit your launchpad and to have the slave and the passive a bit closer.

Case 2: Do you mean you only activated one antennas-array? If so, make your-self sure that you haven't forget any step. In addition, make sure to consider the proper antenna array.

I hope this will help,

HI,

Case 1:
I test in wood desk, near haven't  metallic parts .and slave and passive distance about 1m , I have try to closer.but the result is the same.

Case 2:
Yes , I follow guide:Angle of Arrival(AOA) to modify rtls_passive code
Q1: Is rtls_master,rtls_slave need to modify(according guide ,only modify rtls_passive_code)?
Q2 : How can I make sure to consider the proper antenna array?

Best regards,

Hi,

Case 1: Ok, so no metallic parts on the bottom of the table neither? You can try to elevate a bit the launchpads (basically using some box or books).

Case 2:

Q1: You're right, you only need to modify the passive device.

Q2: By reviewing the code or by checking IOID_27's status. Note: if you have followed the lab, then the antennas-array A1 is activated.

Regards,

Hi,

about Q2.

How to check IOID_27's status ?

Thanks.

Best regards,

Hi,

Melvin Tsai said:

How to check IOID_27's status ?

==> using a logic analyzer

You can consult the AoA BoosterPack getting started page to see which antennas-array is activated according to the IOID_27 value (http://dev.ti.com/tirex/explore/node?node=AANEtvJ3vSoqWPiI3wiqEA__FUz-xrs__LATEST )

Regards,

Hi,

I check IOID_27's status by Digital Phosphor Oscilloscope, and make sure the antennas-array A1 is activated.

Case 1, Task 2 – Modify AoA application to use only one antenna array

Result: Only Left Side ,the angle is stable ,but Right Side the angle is unstable

Case 2, Task 3 – Modify AoA application to use only two antennas

Result: whatever change slave position, the the measuring angle isn't change (the value about 6 angle)

Question:

Q1,Case 1, result only one side is stable , how can I let right side result is stable?

Q2,Case 2, result almost can't change , what's wrong about it? 

Q3,What different is about case 1 and case 2, if i want to stable angle , I should use case 1 or case 2 or two antenna Array?

Thanks

Best regards,

Hi,

Glad to see that you are getting results.

Q1: If you compare the code for "Array 1 only" vs "Array 2 only", then what are the differences? Regarding IOID_27, is it stable (i.e. always HIGH or LOW) in both cases? What about the switching pattern of the antennas (IOID_28, IOID_29, IOID_30)? Is it correct in both cases? If nothing in the SW can explain the differences, then it is an HW problem. Can you try using another AOA_BOOSTERPACK if so?

Q2: Once again, verify which antennas are effectively active. You can try to activate another pair of antennas to see if the results are different.

Q3: In fact the number of antennas / antennas-array to use must be driven by your needs and your possibilities. Having more than one antenna array is absolutely necessary if you want to measure more than 180 degrees angles. For a given number of antennas-arrays, having multiple antennas (i.e. more than two) increase the accuracy of the results (if you have more measures then you can filter the results).

Regards,

Hi,

feedback my test result,

Q1, Try using another AOA_BOOSTERPACK , the result is the same.

Q2, activate another pair of antennas Array2,right side result is stable,but left side is unstable.

I am summary test result.

HW:CC2642R1/CC2552R1 Development Kit(2652) Rev:B x 3   , BOOSTXL-AOA x 1

SW: SimpleLink CC12x2 26x2 SDK - 3.20.00.68

Tool:rtls_agent_cli.exe

Web site:"dev.ti.com/.../"

Case (1) . 20.00.68 rtls_master，rtls_slave，rtls_passive build 3.20.00.68 default code

issue: angle is unstable.

Case (2). Modify AoA application to use only one antenna array - antennas-array A1

                Only Left Side (A1 Array Side),the angle is stable ,but Right Side the angle is unstable

Case (3). Modify AoA application to use only one antenna array - antennas-array A2

                Only Right Side (A2 Array Side),the angle is stable ,but Left Side the angle is unstable

(Only antennas-array A2) ,I move slave device position from (angle) -50 -> 0 -> 50 then back 50 -> 0 -> -50 ,

web sit :

log:

Array_A2.csv

Case 1 is unstable ,

In Case 2,Case 3, Only one side have stable result, how can I improve ?

Best regards,

Hi,

I am not sure to well understand: in case 2 and case 3, do you mean that the angle is stable on the side where the antennas-array is activated and unstable on the side where the antennas-array is deactivated?

Regards,

Hi, 

 A2 array is activated , ( A1 array is deactivated)

(1)  put slave device in right side,as below picture position.

result:

log:

0000.csv

(2)  put slave device in left side,as below picture position.

result:

log:

11111.csv

Best regards,

Hi,

Once again, I am sorry, I don't understand your problem.

I don't understand why you are placing the slave on the deactivated side.

Best regards,

Hi,

Understand, Modify AoA application to use only one antenna array , The behavior is correct. If use only antenna array ,the other side isn't support.

Question:

If I want to demo two antenna array ,

I use the default code , antenna array 1 responsible for left side,antenna array 2 responsible for right side,

the behavior should be as below picture?

Best regards,

Hi,

As you said, by default, the settings are the following:

but I use 3.20.00.68 ( rtls_master，rtls_slave，rtls_passive) build default code, test result is 

How can I add an offset to the computed value,let the result as below?

Best Regard,

Hi,

The easiest solution seems to basically do something following this pseudo code:

if(value > 100) {
    /* No modification required */
    return value;
}
else{
    return (-100 - value);
}

This code can be added on the master/passive side or on the GUI side.

I hope this will help,

Hi,

If I want to  add an offset to the computed value in 3.20.00.68 default code.

Q1 : both master and passive code must modify? 

Q2:  modify code in  AoA.c or?

other question:

HW:CC2642R1/CC2652R1 Development Kit(2652) Rev:B x 3  , BOOSTXL-AOA x 1

support gallery only "https://dev.ti.com/gallery/view/LPRF/RTLS_Monitor_CC26X2/ver/0.9.4/" 

Q : "https://dev.ti.com/gallery/view/LPRF/BOOSTXL_AoA_Display/ver/0.2.0/ "  or "https://training.ti.com/localization-ble"  can support CC2652R1 ?

Best Regard,

Hi,

Q1: For SDK older than 3.30, the AoA measures are only done by the passive. So you only need to modify the passive code (people using SDK 3.30 and latter would need to modify the code of the device(s) performing the measurements)

Q2: You can modify the value where you want :) Modify AOA.c is a good option. You could also chose to modify the value just before sending it to the host (in this case, you need to modify RTLSCtrl_postProcessAoa() in rtls_ctrl_aoa.c).

Q3: (dev.ti.com/.../) only supports CC2640R2 but you can try to port it to CC2642, it should be doable. (https://training.ti.com/localization-ble) was written for CC2640R2 but CC2642 is of course capable to achieve the same kind of demo.

Regards,