def burst_read(addr, length):
    """Read multiple bytes"""
    READ_SINGLE = ACCESS["READ_SINGLE"]["dec"]
    READ_BURST = ACCESS["READ_BURST"]["dec"]
    return spi.xfer2([addr | READ_SINGLE | READ_BURST] + [0x00] * length)



def read_fifo():
    # Burst read RX FIFO
    READ_BURST = ACCESS["READ_BURST"]["dec"]
    RXFIFO = MEMORY["RXFIFI"]["dec"]
    fifo = spi.xfer2([RXFIFO | READ_BURST] + [0x00]*64)  # Max 64 bytes
    return fifo[1:]


def receive_packet():
    # Flush RX FIFO
    SFRX = STROBES["SFRX"]["dec"]
    strobe(SFRX)  # SFRX

    SRX = STROBES["SRX"]["dec"]
    # Go into RX mode
    strobe(SRX)  # SRX

    # Wait for data (use GDO0 in real app)
    time.sleep(0.5)

    # Check RXBYTES
    RXBYTES = STATUS["RXBYTES"]["dec"]
    rx_bytes = read_register(RXBYTES) & 0x7F
    if rx_bytes == 0:
        print("No data received.")
        return None

    # Read data
    RXFIFO = MEMORY["RXFIFO"]["dec"]
    data = read_fifo()  # 0x3F = RX FIFO
    print(f"Received: {data}")
    return data