# -*- coding: utf-8 -*-
# (c) Copyright 2021 Sensirion AG, Switzerland
from __future__ import absolute_import, division, print_function
from sensirion_shdlc_driver import ShdlcFirmwareImage
import logging
log = logging.getLogger(__name__)
[docs]class Svm41FirmwareImage(ShdlcFirmwareImage):
"""
SVM41 firmware image.
This class represents a firmware image for the SVM41 device. It is used to
load and verify Intel-Hex files for performing firmware updates over SHDLC.
"""
[docs] def __init__(self, hexfile):
"""
Constructor which loads and parses the firmware from a hex file.
:param str/file hexfile:
The filename or file-like object containing the firmware in
Intel-Hex format (\\*.hex).
:raise ~sensirion_shdlc_driver.errors.ShdlcFirmwareImageSignatureError:
If the signature of the image is invalid.
"""
super(Svm41FirmwareImage, self).__init__(
hexfile, bl_start_addr=0x8000000, app_start_addr=0x8001000,
signature=b'\x3C\x42\x4C\x2E\x53\x49\x47\x3E',
bl_version_offset=0x0200)