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Original question:

CC2540 & CC2541 TX power level

CC2541: Tx power extra modes setting not working

SenseGiz Team
Expert 1810 points

Part Number: CC2541
Other Parts Discussed in Thread: CC2540,

Hi All,

Just went through Datasheet as i wanted some more Tx power levels in between -6DB to -23 DB

I found one table :

Table 1. Output Power(1) (2)
TXPOWER Setting | Typical Output Power (dBm)
0xE1       0
0xD1    –2
0xC1    –4
0xB1    –6
0xA1    –8
0x91  –10
0x81  –12
0x71  –14
0x61  –16
0x51  –18
0x41  –20

if i have to set these power levels which API i have to use as i have tried with 

HCI_EXT_SetTxPowerCmd(HCI_EXT_TX_POWER_MINUS_12_DBM);

In above command i have added HCI_EXT_TX_POWER_MINUS_12_DBM next number in ll.h where already enum 0,1,2,3 were defined for 4DB,0DB,-6DB,-23DB 

AND Called the API in application but it didn't work. 

i have to pass HCI_EXT_SetTxPowerCmd(0x81); to configure tx power as -12 ?  

Please Guide me ,if i have to test the above mentioned power levels mentioned in Datasheet how to set it using which API in application?

Any inputs or suggestions please write back.

Regards

Atul

  • 0
    TI__Guru** 101540 points

    Hi Atul,

    I am afraid what you are asking is not possible. Here is the documentation for HCI_EXT_SetTxPowerCmd API (in hci.h),

    /*******************************************************************************
 * @fn          HCI_EXT_SetTxPowerCmd API
 *
 * @brief       This HCI Extension API is used to set the transmit power.
 *
 *              Related Events: HCI_VendorSpecifcCommandCompleteEvent
 *
 * input parameters
 *
 * @param       txPower - For CC254x: HCI_EXT_TX_POWER_MINUS_23_DBM,
 *                                    HCI_EXT_TX_POWER_MINUS_6_DBM,
 *                                    HCI_EXT_TX_POWER_0_DBM,
 *                                    HCI_EXT_TX_POWER_4_DBM
 *
 * ....
 *
 * output parameters
 *
 * @param       None.
 *
 * @return      hciStatus_t
 */
extern hciStatus_t HCI_EXT_SetTxPowerCmd( uint8 txPower );

    For CC2540, only the values HCI_EXT_TX_POWER_MINUS_23_DBM, HCI_EXT_TX_POWER_MINUS_6_DBM, HCI_EXT_TX_POWER_0_DBM, LL_EXT_TX_POWER_4_DBM can be passed to the function. Otherwise an error will be raised.

    For CC2541, only the values HCI_EXT_TX_POWER_MINUS_23_DBM, HCI_EXT_TX_POWER_MINUS_6_DBM, HCI_EXT_TX_POWER_0_DBM can be passed to the function. Otherwise an error will be raised.

    I hope this will help,

    Best regards,

  • 0 in reply to Clément
    Expert 1810 points

    Hi Clement,

    Thanks for you response..!!

    So You are saying apart from - 

    For CC2541, only the values HCI_EXT_TX_POWER_MINUS_23_DBM, HCI_EXT_TX_POWER_MINUS_6_DBM, HCI_EXT_TX_POWER_0_DBM can be passed to the function. Otherwise an error will be raised.

    No other Tx power level can be set for  CC2541 ? 

    Regards,

    Atul

  • +1 in reply to SenseGiz Team
    TI__Guru** 101540 points

    Hi,

    Yes, I am saying only the values HCI_EXT_TX_POWER_MINUS_23_DBM, HCI_EXT_TX_POWER_MINUS_6_DBM, HCI_EXT_TX_POWER_0_DBM can be passed to the function for CC2541.

    Best regards,

  • 0 in reply to Clément
    Expert 1810 points

    ok thanks .