rf95.py 文件源码

def init(self):
        # open SPI and initialize RF95
        self.spi.open(0,self.cs)
        self.spi.max_speed_hz = 488000
        self.spi.close()

        # set interrupt pin
        GPIO.setmode(GPIO.BCM)
        GPIO.setup(self.int_pin, GPIO.IN)
        GPIO.add_event_detect(self.int_pin, GPIO.RISING, callback=self.handle_interrupt)

        # set reset pin
        if self.reset_pin != None:
            GPIO.setup(self.reset_pin, GPIO.OUT)
            GPIO.output(self.reset_pin, GPIO.HIGH)
        # wait for reset
        time.sleep(0.05)

        # set sleep mode and LoRa mode
        self.spi_write(REG_01_OP_MODE, MODE_SLEEP | LONG_RANGE_MODE)

        time.sleep(0.01)        
        # check if we are set
        if self.spi_read(REG_01_OP_MODE) != (MODE_SLEEP | LONG_RANGE_MODE):
            return False

        # set up FIFO
        self.spi_write(REG_0E_FIFO_TX_BASE_ADDR, 0)
        self.spi_write(REG_0F_FIFO_RX_BASE_ADDR, 0)

        # default mode
        self.set_mode_idle()

        self.set_modem_config(Bw125Cr45Sf128)
        self.set_preamble_length(8)

        return True