如何使用ZStack——输出功率编程设置

转自http://hi.baidu.com/ychyichun/item/d588f8fa8dd669c30cd1c802

RF输出功率可以由RF寄存器TRCTRLL.PA_LEVEL控制，具体设置参数可参考下表：

 

ZStack中有如下定义：

const uint8 CODE macRadioDefsTxPowerTable[] =
{
  /*   0 dBm */   0x5F,   /* characterized as -0.4 dBm in datasheet */
  /*  -1 dBm */   0x3F,   /* characterized as -0.9 dBm in datasheet */
  /*  -2 dBm */   0x3F,
  /*  -3 dBm */   0x1B,   /* characterized as -2.7 dBm in datasheet */
  /*  -4 dBm */   0x17,   /* characterized as -4.0 dBm in datasheet */
  /*  -5 dBm */   0x13,  
  /*  -6 dBm */   0x13,   /* characterized as -5.7 dBm in datasheet */
  /*  -7 dBm */   0x13,
  /*  -8 dBm */   0x0F,   /* characterized as -7.9 dBm in datasheet */
  /*  -9 dBm */   0x0F,
  /* -10 dBm */   0x0F,
  /* -11 dBm */   0x0B,   /* characterized as -10.8 dBm in datasheet */
  /* -12 dBm */   0x0B,
  /* -13 dBm */   0x0B,
  /* -14 dBm */   0x0B,
  /* -15 dBm */   0x07,   /* characterized as -15.4 dBm in datasheet */
  /* -16 dBm */   0x07,
  /* -17 dBm */   0x07,
  /* -18 dBm */   0x07,
  /* -19 dBm */   0x06,   /* characterized as -18.6 dBm in datasheet */
  /* -20 dBm */   0x06,
  /* -21 dBm */   0x06,
  /* -22 dBm */   0x06,
  /* -23 dBm */   0x06,
  /* -24 dBm */   0x06,
  /* -25 dBm */   0x03    /* characterized as -25.2 dBm in datasheet */
};

缺省设置为0dBm，即

#define MAC_RADIO_TX_POWER_DEFAULT              0x1F

macPhyTxPower = MAC_RADIO_TX_POWER_DEFAULT;

MAC_RADIO_SET_TX_POWER(macPhyTxPower);

至于macRadioDefsTxPowerTable中0dBm为0x5F而不是0x1F，是因为0x1F只代表TRCTRLL的低5位即TRCTRLL.PA_LEVEL，而0x5F则包含了高3位的缘故。