esp-idf/examples/system/ota/otatool/get_running_partition.py

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2.4 KiB
Python

#!/usr/bin/env python
#
# Demonstrates the use of otatool.py, a tool for performing ota partition level
# operations.
#
# SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD
# SPDX-License-Identifier: Apache-2.0
import argparse
import os
import re
import subprocess
import sys
from subprocess import CalledProcessError
import serial
def get_running_partition(port=None):
# Monitor the serial output of target device. The firmware outputs the currently
# running partition
IDF_PATH = os.path.expandvars('$IDF_PATH')
sys.path.append(os.path.join(IDF_PATH, 'components', 'esptool_py', 'esptool'))
try:
# esptool>=4.0
from esptool.loader import ESPLoader
except (AttributeError, ModuleNotFoundError):
# esptool<4.0
from esptool import ESPLoader
ESPTOOL_PY = os.path.join(IDF_PATH, 'components', 'esptool_py', 'esptool', 'esptool.py')
baud = os.environ.get('ESPTOOL_BAUD', ESPLoader.ESP_ROM_BAUD)
if not port:
error_message = 'Unable to obtain default target device port.\nSerial log:\n\n'
try:
# Check what esptool.py finds on what port the device is connected to
output = subprocess.check_output([sys.executable, ESPTOOL_PY, 'chip_id']) # may raise CalledProcessError
pattern = r'Serial port ([\S]+)'
pattern = re.compile(pattern.encode())
port = re.search(pattern, output).group(1) # may raise AttributeError
except CalledProcessError as e:
raise Exception(error_message + e.output)
except AttributeError:
raise Exception(error_message + output)
serial_instance = serial.serial_for_url(port.decode('utf-8'), baud, do_not_open=True)
serial_instance.dtr = False
serial_instance.rts = False
serial_instance.rts = True
serial_instance.open()
serial_instance.rts = False
# Read until example end and find the currently running partition string
content = serial_instance.read_until(b'Example end')
pattern = re.compile(b'Running partition: ([a-z0-9_]+)')
running = re.search(pattern, content).group(1)
return running.decode('utf-8')
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--port', default=None)
args = parser.parse_args()
try:
res = get_running_partition(args.port)
except Exception as e:
print(e.message)
sys.exit(1)
print(res)
if __name__ == '__main__':
main()