CCS/CC2652P: Some questions about Tx power on CC1352P/CC2652P

Kimi Hu

Genius 6000 points

Part Number: CC2652P
Other Parts Discussed in Thread: CC1352P, SMARTRFTM-STUDIO, SYSCONFIG, Z-STACK

Tool/software: Code Composer Studio

Hi all,

Our setting is showing below :

SW : simplelink_cc13x2_26x2_sdk_3_40_00_02, smartRF Studio 7-2.16.0

HW : CC1352P-2 DK, Customer board(CC2652P)

test :

studio 7 --> set TX power = 20dbm

Spectrum Analyzer --> CC1352P-2 DK --> get 19.x dbm

Customer board(CC2652P) --> get 19.x dbm

simplelink_cc13x2_26x2_sdk_3_40_00_02 --> CC1352P_2_LAUNCHXL --> zstack --> zed_sw

setting tx power :

zstack_sysSetTxPowerReq_t req;
zstack_sysSetTxPowerRsp_t rsp;
req.requestedTxPower = 20;
Zstackapi_sysSetTxPowerReq(appServiceTaskId, &req, &rsp);

Spectrum Analyzer --> CC1352P-2 DK --> get 14.x dbm

Customer board(CC2652P) --> get 3.x dbm

question :

1. Where is the power table in simplelink_cc13x2_26x2_sdk_3_40_00_02 --> zstack ? How to check the power table is correct?(when I change the power with PA in studio, there is no parameters change)

2. When we use CC2652P, do we need change anything in zstack ?

over 4 years ago

0 Ryan Brown1 over 4 years ago

TI__Guru**** 202506 points

Hi Kimi,

Edit: My initial post referred to the incorrect resource.

1. Power tables are defined in ti_radio_config.c as created by SysConfig. By default the output power is set to 20 dBm, is this what you see in the ZED project if you do not use Zstackapi_sysSetTxPowerReq? Even though no parameter changes are shown in SMARTRFTM-STUDIO, the pOverridesTx20 does change in the smartrf_settings.c output file. Did you mean "4.x dmb" instead of 14?

2. No, http://dev.ti.com/tirex/content/simplelink_cc13x2_26x2_sdk_3_40_00_02/docs/zigbee/html/cc2652p/software-on-cc2652p.html

Regards,
Ryan

0 YiKai Chen over 4 years ago in reply to Ryan Brown1

Guru 735455 points

Ryan Brown1

1. We mean 14.x dbm not 4.x dbm. Since default output TX power is set as 20 dbm, we expect we can see 17 or 18 dbm at least from spectrum analyzer. However, we can only see 14.x dbm.

2. We are aware of this link from the beginning we try to use CC2652P.

0 Kimi Hu over 4 years ago in reply to Ryan Brown1

Genius 6000 points

Hi Ryan,

We do some test to clarify the problem

common setting : add bdbStartCommissioningReq in the zclSampleSw_Init() and zclSampleSw_ProcessCommissioningStatus() --> case BDB_COMMISSIONING_NWK_STEERING --> you can check attachment (search "kimi add")

5270.zcl_samplesw.zip

test :

case 1 : no Zstackapi_sysSetTxPowerReq(default project)

CC1352P-2 DK --> 14.x dBm

customer board --> 14.x dBm

case 2 : add Zstackapi_sysSetTxPowerReq in the zclSampleSw_initialization()

CC1352P-2 DK --> first (and second) beacon is 19.x dBm then decrease to 14.x dBm

customer board --> first (and second) beacon is 19.x dBm then decrease to 14.x dBm

case 3 : add Zstackapi_sysSetTxPowerReq in the zclSampleSw_initialization() and zclSampleSw_ProcessCommissioningStatus() --> case BDB_COMMISSIONING_NWK_STEERING

CC1352P-2 DK --> 19.x dBm

customer board --> 19.x dBm

By the way, we also develop ZNP project, when we add Zstackapi_sysSetTxPowerReq in the ZNP. ZNP does not work anymore, please tell us how to change tx power in the ZNP Thanks

npi_task.zip

0 Ryan Brown1 over 4 years ago in reply to Kimi Hu

TI__Guru**** 202506 points

Hi Kimi,

These numbers are more positive than originally recorded. This verifies that the internal PA is active and that there are no differences in TX power output between the CC1352P and CC2652P. We are continuing to improve SysConfig initialization (case 1). Why is Zstackapi_sysSetTxPowerReq used in the context of BDB_COMMISSIONING_NWK_STEERING where the commissioning status is not BDB_COMMISSIONING_SUCCESS? For the ZNP I recommend using the SYS_SET_TX_POWER MT API instead of modifying the CCS project.

Regards,
Ryan

0 YiKai Chen over 4 years ago in reply to Ryan Brown1

Guru 735455 points

Ryan Brown1 Yes, we can try to use MT API SYS_SET_TX_POWER to set TX power. However, we would like to set default TX power in ZNP project by using Zstackapi_sysSetTxPowerReq. Can you check why ZNP would stop working if we use Zstackapi_sysSetTxPowerReq in ZNP project?

0 Ryan Brown1 over 4 years ago in reply to YiKai Chen

TI__Guru**** 202506 points

Zstackapi_* functions are used in an application context which the ZNP does not have. Therefore you will need to use ZMacSetTransmitPower or MAP_MAC_MlmeSetReq with parameter ZMacPhyTransmitPowerSigned/MAC_PHY_TRANSMIT_POWER_SIGNED instead.

Regards,
Ryan

0 YiKai Chen over 4 years ago in reply to Ryan Brown1

Guru 735455 points

We are not aware that ZNP project cannot use Zstackapi_* functions. Do you specify this in any Z-Stack document? If not, I would suggest you to put this into your document.

0 Ryan Brown1 over 4 years ago in reply to YiKai Chen

TI__Guru**** 202506 points

I've noted your feedback and will try to address it before the next SDK release.

Regards,
Ryan

0 YiKai Chen over 4 years ago in reply to Ryan Brown1

Guru 735455 points

Ryan Brown1 Thank you!

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CCS/CC2652P: Some questions about Tx power on CC1352P/CC2652P