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目的是想获得CC2530+2591的最大发射功率，以增加通讯距离。
我尝试的方法如下，但是不成功:在zstack的osal_start_system()之前，调用macRadioSetTxPower(uint8 txPower)，txPower参数值为20。但是当我单步跟进这个设置函数后，发现该值还是19。是要怎么去设置呢？
