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How to set the CC2530 output power to 4.5dBm

Zhai Yihua
Intellectual 300 points
Other Parts Discussed in Thread: CC2530, Z-STACK, TIMAC

How to set the CC2530 output power to 4.5dBm:

I am now using CC2530ZDK @ Z-Stack 2.3.0-1.4.0 @ Sensor Demo software, I regard the output power maybe not set at 4.5 dBm, than the range can't achieve to 400m, and just at 200m,

the follow is copy from z_mac internal.h

--------------------------------------------------------

// MAC Type Indication
#define ZMAC_F8W

// PHY transiver output power values
#define OUTPUT_POWER_0DBM       0x00
#define OUTPUT_POWER_N1DBM      0x21
#define OUTPUT_POWER_N3DBM      0x23
#define OUTPUT_POWER_N5DBM      0x25
#define OUTPUT_POWER_N7DBM      0x27
#define OUTPUT_POWER_N10DBM     0x2A
#define OUTPUT_POWER_N15DBM     0x2F
#define OUTPUT_POWER_N25DBM     0x39

// MAC PIB Attributes

------------------------------------------------------------

you can see, the output power max just set to 0dBm. so, please help how to set the output power to 4.5dBm

I regard the data sheet that set the outpower to 4.5dBm is just set the TXPOWER=0xF5, but I can't find how to process is at Z_stack, please give your great help. thanks.

 

BestRegard.Yihua

  • 0
    Intellectual 840 points

    For Z-stack 2.3.0 with cc2530, I just use the following API to set the value directly.

    MAC_MlmeSetReq( ZMacPhyTransmitPower, &level );

    It seems ok as the register setting in the debugger verifies this.

    For older stack, the line //#define HAL_MAC_USE_REGISTER_POWER_VALUES shouldn't be commented out.

     

  • 0 in reply to Leo Choi
    Intellectual 300 points

    Hi Leo,

    Very thanks, but need your great help more, I found the API as extern ZMacStatus_t ZMacSetTransmitPower( ZMacTransmitPower_t level ); at ZMAC.h, but I don't know how to use it at where and when.

    I regard that the Sensor Demo project just set the output powre at 1dBm, the TXPOWER=0xD5 as follow:

     

    BestRegard.Yihua

  • 0 in reply to Zhai Yihua
    Intellectual 840 points

    arghh...

    both function are the same usage......

     

    -----------------------------------------------------

    uint8 TxValue = 0xF5;

    MAC_MlmeSetReq( ZMacPhyTransmitPower, &TxValue );

    ------------------------------------------------------

    Only do it after ZMac Initialization.

     

  • 0 in reply to Leo Choi
    Prodigy 50 points

    Hi, I have a similar problem.

    I want to reduct  the output power ( for well testing the multi-hop).

    ------

    I've tried to use

    MAC_MlmeSetReq( ...)

    after the

    ZMacInit();

    just before

    osal_start_system();

    in Zmain.C.

    But It doesn't work.

    -----

    I starded using

    ZMacSetTransmitPower(...)

    defined in ZMAC.h, and then I've looking inside the "low-level files".

    I've found the 

    macRadioSetTxPower(...)

    function. But It doesn't work.

    The last idea was modified the

    #define MAC_RADIO_TX_POWER_DEFAULT

    Isn't the best solution, but only for testing....

    --------

    But It still doesn't work, any Idea ?

    Thanks

     

     


  • 0 in reply to FV
    TI__Guru 57865 points

    Uncomment #Define HAL_MAC_USE_REGISTER_POWER_VALUES

    in mac_radio_def.h to allow the use of register values to set Tx Power.


    Then use following code line to set transmit power:

    MAC_MlmeSetReq(MAC_PHY_TRANSMIT_POWER_SIGNED, &txValue);

     

    (txValue = 0xF5 for 4.5dBm)

     

    This should solve your problem.

  • 0 in reply to J Lindh
    Intellectual 840 points

    what i notice that..

    The line #define hal_mac... blahblahblah should be uncommented for stack ver <2.2.2

    It should not be uncommneted for stack ver >= 2.3.0...

  • 0 in reply to Leo Choi
    TI__Guru 57865 points

    Well as I recall:

    • If MAC_MlmeSetReq(MAC_PHY_TRANSMIT_POWER_SIGNED, &txValue) is used to set TxPower as I suggested you have to un-comment #Define HAL_MAC_USE_REGISTER_POWER_VALUES to be able to use register values. This function is commonly used when setting tx power in TIMAC (also embedded as MAC layer in Z-stack?)
    • With Z-stack you should use ZMacSetTransmitPower(ZmacTransmitPower_r level) and as you say Leo, not uncomment, because there are defines to use for the different TxPowers.

    However, I uncommented the define and used the first alternative just because in my case it worked, not saying anything is right or wrong. I tried different methods, but this one was the only one working for the higher outputs. I could add that this is what I believe a temporarily solution to the problem, and not the most beautiful usage of the Z-stack.

    (I am currently using 2.3.0)

  • 0 in reply to J Lindh
    Prodigy 20 points

    HI,

    you can change the code as follows("mac_radio_defs.h"):

    1.TxPower = 0xF5

    /* register value table offset */
    #define MAC_RADIO_DEFS_TBL_TXPWR_FIRST_ENTRY   0
    #define MAC_RADIO_DEFS_TBL_TXPWR_LAST_ENTRY    0
    #define MAC_RADIO_DEFS_TBL_TXPWR_ENTRIES            2

    2.TxPower = 0xE5

    /* register value table offset */
    #define MAC_RADIO_DEFS_TBL_TXPWR_FIRST_ENTRY   0
    #define MAC_RADIO_DEFS_TBL_TXPWR_LAST_ENTRY    1
    #define MAC_RADIO_DEFS_TBL_TXPWR_ENTRIES            0

    3.TxPower = 0xD5

    /* register value table offset */
    #define MAC_RADIO_DEFS_TBL_TXPWR_FIRST_ENTRY   0
    #define MAC_RADIO_DEFS_TBL_TXPWR_LAST_ENTRY    1
    #define MAC_RADIO_DEFS_TBL_TXPWR_ENTRIES            2