CCS/CC2642R-Q1: How to change the default TX POWER in CC2642 ?

heng fu

Part Number: CC2642R-Q1
Other Parts Discussed in Thread: SYSCONFIG

Tool/software: Code Composer Studio

The default TX POWER of Simple Peripheral project is 0dBm . However , the TX POWER should be changed to 5dBm in order to improve BLE transmition distance .
In order to verify which configuration setting parameter can change the default TX POWER , the HOST TEST project and CC2652 Launchpad were used , as shown in picture 1 . The macro
definition DEFAULT_TX_POWER was set to HCI_EXT_TX_POWER_5_DBM , as shown in picture 2 . Testing the actual TX POWER of CC2652 through R&S CMW500, as shown in picture 3 . The testing result
is shown in picture 4 .
Neither the DEFAULT_TX_POWER was set to HCI_EXT_TX_POWER_5_DBM or HCI_EXT_TX_POWER_0_DBM , the actual TX POWER of CC2652 stayed the same . How to change the default TX POWER in CC2642 ?
Where is my configuration wrong ?

picture 1 CC2652 Launchpad

picture 2 My DEFAULT_TX_POWER configuration

picture 3 R&S CMW500

picture 4 TX POWER testing result

1.My develop environment:
（1）CCS: Code Composer Studio 10.0.0
（2）SDK: simplelink_cc13x2_26x2_sdk_4_10_00_78
（3）hardware:CC2652 launchpad develop kit

2.Attachments（1）ble5_host_test_cc26x2r1lp_app-0dbm-capArray0X00.hex ： DEFAULT_TX_POWER was set to HCI_EXT_TX_POWER_0_DBM
（2）ble5_host_test_cc26x2r1lp_app-5dbm-capArray0X00.hex ： DEFAULT_TX_POWER was set to HCI_EXT_TX_POWER_5_DBM

attachments can be downloaded here:

attachments.rar

over 5 years ago

0 YiKai Chen over 5 years ago

Guru 735685 points

I suppose you can configure TX power from sysconfig.

0 Alec May over 5 years ago

TI__Genius 17265 points

Hi Heng,

Building off of what YiKai said, is sysconfig enabled in your project? If so, you should modify the DEFAULT_TX_POWER through the sysconfig GUI, because the value set in sysconfig will override the value that you showed in your screenshot at compile-time.

Best Regards,
Alec M

0 heng fu over 5 years ago in reply to Alec May

Expert 1020 points

Hi,Alec,

The sysconfig GUI makes it plain that TX POWER cannot be modified in host test project , as shown in picture 1 . Do you have any other solutions to modify the TX POWER in host test project ?

picture 1 GUI

0 YiKai Chen over 5 years ago in reply to heng fu

Guru 735685 points

For HostTest, you have to use HCIExt_SetTxPowerCmd which you can test by Btool.

0 heng fu over 5 years ago in reply to YiKai Chen

Expert 1020 points

For HostTest, I have used the HCI_EXT_SetTxPowerCmd by HCITester as shown in picture 1 . The value of HCI_EXT_SetTxPowerCmd in HCITester is the same as HCIExt_SetTxPowerCmd in Btool , as shown in picture 2 . However , the actual TX POWER of CC2642 didn't change . Do you have any other solutions to modify the TX POWER in host test project ?

picture 1 HCITester COMMAND

picture 2 Value of HCI_EXT_SetTxPowerCmd

0 YiKai Chen over 5 years ago in reply to heng fu

Guru 735685 points

What do you mean the actual TX POWER of CC2642 didn't change? Do you measure and verify it by spectrum analyzer?

0 heng fu over 5 years ago in reply to YiKai Chen

Expert 1020 points

The actual TX POWER of CC2642 was measured by R&S CMW500 , as shown in picture 1 . And the test report is shown in picture 2 . The actual TX POWER of CC2642 is shown in the report .

picture 1 R&S CMW500

picture 2 Test Report

0 Alec May over 5 years ago in reply to heng fu

TI__Genius 17265 points

Hi Heng,

Sorry for the delay. I have looked into this, and I believe that this is related to a known issue that is being worked on. I would like to take this discussion offline, and I have reached out to the FAE to try to coordinate this.

Best Regards,
Alec M

0 YiKai Chen over 5 years ago in reply to Alec May

Guru 735685 points

Alec May If you think this is related to a known issue that is being worked on, can you share your fix here so others have similar issue can be benefited too?

0 Alec May over 5 years ago in reply to YiKai Chen

TI__Genius 17265 points

Hi YiKai,

There is currently an open issue in BTool causing this to occur. We are working on doing a point-release of the SDK to address these types of issues in the meantime.

Best Regards,
Alec M

0 YiKai Chen over 5 years ago in reply to Alec May

Guru 735685 points

If this is an issue on BTool, I would suggest you to post here when new BTool release fixes the problem.

0 Markel Robregado over 5 years ago in reply to Alec May

Guru 86755 points

BTool issue? as you can see the customer is using R&S CMW500.

While you are troubleshooting this setting TX Power issue, try setting the TX Power through Bluetooth Characteristics, see if that works according to your HCI document.

-kel

Bluetooth®︎

Bluetooth forum

CCS/CC2642R-Q1: How to change the default TX POWER in CC2642 ?