nrf24.py 文件源码

def setPALevel(self, level):
        setup = self.read_register(NRF24.RF_SETUP)
        setup &= ~( _BV(NRF24.RF_PWR_LOW) | _BV(NRF24.RF_PWR_HIGH))
        # switch uses RAM (evil!)
        if level == NRF24.PA_MAX:
            setup |= (_BV(NRF24.RF_PWR_LOW) | _BV(NRF24.RF_PWR_HIGH))
        elif level == NRF24.PA_HIGH:
            setup |= _BV(NRF24.RF_PWR_HIGH)
        elif level == NRF24.PA_LOW:
            setup |= _BV(NRF24.RF_PWR_LOW)
        elif level == NRF24.PA_MIN:
            nop = 0
        elif level == NRF24.PA_ERROR:
            # On error, go to maximum PA
            setup |= (_BV(NRF24.RF_PWR_LOW) | _BV(NRF24.RF_PWR_HIGH))

        self.write_register(NRF24.RF_SETUP, setup)