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

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2.8 KiB
Python

#!/usr/bin/env python
#
# Demonstrates the use of otatool.py, a tool for performing ota partition level
# operations.
#
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
import serial
import subprocess
import re
import argparse
from subprocess import CalledProcessError
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'))
import esptool
ESPTOOL_PY = os.path.join(IDF_PATH, "components", "esptool_py", "esptool", "esptool.py")
baud = os.environ.get("ESPTOOL_BAUD", esptool.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()