Default Power Level set by the bluetooth_init_cc2560A_2.8.bts file for CC2560A

sunil kumar1

Hi,

I am using PAN1325A bluetooth module with the TI controller CC2560A in our product. It is a class 2 module. I dump the bluetooth_init_cc2560A_2.8.bts file during every power ON into the controller and I do not configure/change any other settings. Now my problem is to find the TX power of the module. I read about the vendor specific commands like

HCI_VS_DRPb_Set_Power_Vector (0xFD82)

HCI_VS_DRPb_Tester_Con_TX(0xFD84)

HCI_VS_DRPb_Enable_RF_Calibration (0xFD80)

HCI_VS_DRPb_Set_Class2_Single_Power (0xFD87)

etc, but I am unable to get a clear Idea about the TX power settings.

Now my Questions are,

1.What is the default Power level set by the bluetooth_init_cc2560A_2.8.bts?

2.What is the default Power vector table used by the bluetooth_init_cc2560A_2.8.bts?

Also please tell me the procedure with an example command structure to change the TX power level of the module. Just to make sure. Note: I am asking for the end use case and not for any testing.

Thanks in Advance!

over 10 years ago

0 Sundeep Javvaji over 10 years ago

TI__Mastermind 32615 points

Hi,

The default power vectors are mentioned in the section processors.wiki.ti.com/.../CC256x_VS_HCI_Commands

and the same are been used one difference is the below command
Send_HCI_VS_DRPb_Set_Class2_Single_Power 0xFD87, 0x0d, 0x0d, 0x0d

There are two ways you can change the power level
1. Is using the BHET as menctioned here, processors.wiki.ti.com/.../CC256x_Downloads
2. Using VS_Set_Max_Output_Power API sets the power vectors, and then right after that calling the calibration command which is a must.

0 sunil kumar1 over 10 years ago in reply to Sundeep Javvaji

Prodigy 30 points

Hi Sundeep,

Thank you very much for your quick response!!!

From your reply I understand that the default Power level set by the bluetooth_init_cc2560A_2.8.bts file is Power level 13 which corresponds to TX power of 2dbm as per the default power vector table.

Can you please confirm me whether my understanding is right???

Once again thanks a lot!!!

Sunil

0 Sundeep Javvaji over 10 years ago in reply to sunil kumar1

TI__Mastermind 32615 points

Hi,

Send_HCI_VS_DRPb_Set_Class2_Single_Power command lets the user set the power level to be used during a connection.
See processors.wiki.ti.com/.../CC256x_VS_HCI_Commands

And the default Max TX Power is 12dBm and corresponds to Power Level 15.

0 sunil kumar1 over 10 years ago in reply to Sundeep Javvaji

Prodigy 30 points

Hi,

I know that the default Max TX power is 12dbm and it is power level 15.

But what I want to know is, which power level is actually used during normal operations in the bluetooth_init_cc2560A_2.8.bts file? Is it the Max power level 15 is used by default during normal connections and communications? OR Is it the Power level 13 is used since Send_HCI_VS_DRPb_Set_Class2_Single_Power 0xFD87, 0x0d, 0x0d, 0x0d is applied?

For your kind information that I am not using any SDK and TI bluetooth stack. I am not going to use any of the APIs like VS_Set_Max_Output_Power. I never change any of the settings after loading the bluetooth_init_cc2560A_2.8.bts file. Please keep this in mind before answering my question.

Thanks,

Sunil

0 Sundeep Javvaji over 10 years ago in reply to sunil kumar1

TI__Mastermind 32615 points

Hi,

As mentioned in the wiki processors.wiki.ti.com/.../CC256x_VS_HCI_Commands

For the device which do not support the power control feature, power level 13 will be used during the connection.
For other devices it can be up to power level 15 (depends on increasing or decreasing the transmitted power level from the remote device as well)

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Default Power Level set by the bluetooth_init_cc2560A_2.8.bts file for CC2560A