CC1312R7: CC1312SIP - SmartRF studio 7 2.28.0 Tx power

Fleishman Fleishman

Intellectual 340 points

Part Number: CC1312R7
Other Parts Discussed in Thread: SYSCONFIG

Hi,

I work with last version of CC1312SIP device .

Connect it to Smart RF studio 7 v2.28 .

Issue 1 :

Set Tx power to 0 got ~ -7dbm

Set Tx power to 5 got ~ -1dbm

Set Tx power to 10 got ~ 5dbm

The same results with EVB and my board .

Issue 2

When I set the Tx to < 14 i uncheck the "Enable High output power PA "

Set to 0 -> I see in CMD_PROP_RADIO_DIV_SETUP_PA the txPower change to 0x10C8

Set to 5 -> I see in CMD_PROP_RADIO_DIV_SETUP_PA the txPower change to 0x1CCE

The txPower register change form setting to setting .

When i set the Tx to >= 14

I see the changes on in pOverridesTx20[]:TX20_POWER_OVERRIDE(0x001B8ED2);

and the :

.pRegOverrideTxStd = pOverridesTxStd,

.pRegOverrideTx20 = pOverridesTx20

Add to CMD_PROP_RADIO_DIV_SETUP_PA

In both cases the change is in CMD_PROP_RADIO_DIV_SETUP_PA that used only in RF_open() function that call on device init .

I need to change the Tx power in run time on every Tx chain.

My Tx chain :

RF_Op* const rf_cmd_chain_tx[] =
{
(RF_Op*) &RF_cmdFs,
(RF_Op*) &RF_cmdSchImm_RF_cmdWriteFwpar,
(RF_Op*) &RF_cmdSchImm_RF_cmdSetTxPower,
(RF_Op*) &RF_cmdPropTx,
NULL,
};

I use with RF_cmdSchImm_RF_cmdSetTxPower to change the Tx power .

What I need to do when I using the SIP chip SDK version 6.30

Thanks

Yaki

over 2 years ago

0 Sid over 2 years ago

TI__Mastermind 20407 points

Hi Yaki,

Have you looked at the RF_setTxPower API?

https://dev.ti.com/tirex/content/simplelink_cc13xx_cc26xx_sdk_6_40_00_13/docs/rflib/html/_r_f_c_c26_x2_8h.html#rf_tx_power

Using the 1312SIP and non SIP version, should not change the RF driver calls.

I will look into the smart RF studio issues you are seeing.

Regards,

Sid

0 Sid over 2 years ago in reply to Sid

TI__Mastermind 20407 points

Hi Yaki, we also need to know the frequency at which you are testing the output power.

0 Fleishman Fleishman over 2 years ago in reply to Sid

Intellectual 340 points

Hi Sid ,

I work with 912.749Mhz

When I work with RF_setTxPower(); I need to define RF_TxPowerTable_Entry txPowerTable[]

In the table I need to define Power and the related value .

In the past I took the values from RF studio :

1. When I use with Tx power > 14dbm the txPower = 0xFFFF, So from where I can take the values ?

Do you have the updated table for SIP ?

Thanks

Yaki

0 Sid over 2 years ago in reply to Fleishman Fleishman

TI__Mastermind 20407 points

Hi Yaki,

I see that the high output power settings are update in the override and not in the txPower field.

Are you using Sysconfig? If you generate the power table in sysconfig, you see that the whole table is generated with the settings for 15-20dbm.

It seems that the txpower is just 2 bytes wide and these high power settings goes into overrides instead.

Once you have this power table in radio_config.h, all you need to provide to the the RF_setTxPower is the value of power you want to set. The RF_setTxPower() will take care of whether it is an upgrade to override or to txpower field.

Regards,

Sid

0 Fleishman Fleishman over 2 years ago in reply to Sid

Intellectual 340 points

Hi Sid

Thanks for your advice it work and I see that Tx power change with some correlation to what I define the Tx power .

But the number are not accurate.

I put 20dbm got 18dbm

I put 16dbm got 13dbm

I put 14dbm got 11.6dbm

I put 10dbm got 5.4dbm

I put 5dbm got -1.2dbm

Please advice

Yaki

0 Sid over 2 years ago in reply to Fleishman Fleishman

TI__Mastermind 20407 points

Hi Yaki,

I have asked the RF expert, they will get back to you soon.

Regards,

Sid

0 RGW over 2 years ago in reply to Fleishman Fleishman

TI__Mastermind 33080 points

Hi Yaki,

Agree with your measurements. The final power settings have not yet been implemented in SmartRF studio or SDK so there are some deviations from the measured power level to the power settings. These will be updated shortly.

Regards,

Richard

0 Fleishman Fleishman over 2 years ago in reply to RGW

Intellectual 340 points

Thanks Richard ,

I waiting to you update .

In additional, When I used with 20dbm or 14dbm i need to enable "Force VDDR " ?

Please device

Thanks

0 Sid over 2 years ago in reply to Fleishman Fleishman

TI__Mastermind 20407 points

Hi Yaki,

Sorry for the delays. You do not need to set the Force VDDR setting for a PSIP device. You would automatically use the high PA for these transmissions.

Regards,

Sid

Sub-1 GHz

Sub-1 GHz forum

CC1312R7: CC1312SIP - SmartRF studio 7 2.28.0 Tx power