busdevice_read_register_spi_simpletest.py

import busio
import board
import digitalio
from adafruit_bus_device.spi_device import SPIDevice

DEVICE_ADDRESS = 0x68 # device address of BMP280 board
A_DEVICE_REGISTER = 0xD0 # device id register on the BMP280 board

# The follow is for SPI communications
cs = digitalio.DigitalInOut(board.A2)
comm_port = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
device = SPIDevice(comm_port, cs)

#pylint: disable-msg=no-member
with device as bus_device:
    bus_device.write(bytes([A_DEVICE_REGISTER]))
    result = bytearray(1)
    bus_device.readinto(result)

print(''.join('{:02x}'.format(x) for x in result))