circuitpython/ports/cc3200/tools/update-wipy.py

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#!/usr/bin/env python
"""
The WiPy firmware update script. Transmits the specified firmware file
over FTP, and then resets the WiPy and optionally verifies that software
was correctly updated.
Usage:
./update-wipy.py --file "path_to_mcuimg.bin" --verify
Or:
python update-wipy.py --file "path_to_mcuimg.bin"
"""
import sys
import argparse
import time
import socket
from ftplib import FTP
from telnetlib import Telnet
def print_exception(e):
print("Exception: {}, on line {}".format(e, sys.exc_info()[-1].tb_lineno))
def ftp_directory_exists(ftpobj, directory_name):
filelist = []
ftpobj.retrlines("LIST", filelist.append)
for f in filelist:
if f.split()[-1] == directory_name:
return True
return False
def transfer_file(args):
with FTP(args.ip, timeout=20) as ftp:
print("FTP connection established")
if "230" in ftp.login(args.user, args.password):
print("Login successful")
if "250" in ftp.cwd("/flash"):
if not ftp_directory_exists(ftp, "sys"):
print("/flash/sys directory does not exist")
if not "550" in ftp.mkd("sys"):
print("/flash/sys directory created")
else:
print("Error: cannot create /flash/sys directory")
return False
if "250" in ftp.cwd("sys"):
print("Entered '/flash/sys' directory")
with open(args.file, "rb") as fwfile:
print("Firmware image found, initiating transfer...")
if "226" in ftp.storbinary("STOR " + "mcuimg.bin", fwfile, 512):
print("File transfer complete")
return True
else:
print("Error: file transfer failed")
else:
print("Error: cannot enter /flash/sys directory")
else:
print("Error: cannot enter /flash directory")
else:
print("Error: ftp login failed")
return False
def reset_board(args):
success = False
try:
tn = Telnet(args.ip, timeout=5)
print("Connected via Telnet, trying to login now")
if b"Login as:" in tn.read_until(b"Login as:", timeout=5):
tn.write(bytes(args.user, "ascii") + b"\r\n")
if b"Password:" in tn.read_until(b"Password:", timeout=5):
# needed because of internal implementation details of the WiPy's telnet server
time.sleep(0.2)
tn.write(bytes(args.password, "ascii") + b"\r\n")
if b'Type "help()" for more information.' in tn.read_until(
b'Type "help()" for more information.', timeout=5
):
print("Telnet login succeeded")
tn.write(b"\r\x03\x03") # ctrl-C twice: interrupt any running program
time.sleep(1)
tn.write(b"\r\x02") # ctrl-B: enter friendly REPL
if b'Type "help()" for more information.' in tn.read_until(
b'Type "help()" for more information.', timeout=5
):
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tn.write(b"import machine\r\n")
tn.write(b"machine.reset()\r\n")
time.sleep(2)
print("Reset performed")
success = True
else:
print("Error: cannot enter friendly REPL")
else:
print("Error: telnet login failed")
except Exception as e:
print_exception(e)
finally:
try:
tn.close()
except Exception as e:
pass
return success
def verify_update(args):
success = False
firmware_tag = ""
def find_tag(tag):
if tag in firmware_tag:
print("Verification passed")
return True
else:
print("Error: verification failed, the git tag doesn't match")
return False
retries = 0
while True:
try:
# Specify a longer time out value here because the board has just been
# reset and the wireless connection might not be fully established yet
tn = Telnet(args.ip, timeout=10)
print("Connected via telnet again, lets check the git tag")
break
except socket.timeout:
if retries < 5:
print("Timeout while connecting via telnet, retrying...")
retries += 1
else:
print("Error: Telnet connection timed out!")
return False
try:
firmware_tag = tn.read_until(b"with CC3200")
tag_file_path = args.file.rstrip("mcuimg.bin") + "genhdr/mpversion.h"
if args.tag is not None:
success = find_tag(bytes(args.tag, "ascii"))
else:
with open(tag_file_path) as tag_file:
for line in tag_file:
bline = bytes(line, "ascii")
if b"MICROPY_GIT_HASH" in bline:
bline = (
bline.lstrip(b"#define MICROPY_GIT_HASH ")
.replace(b'"', b"")
.replace(b"\r", b"")
.replace(b"\n", b"")
)
success = find_tag(bline)
break
except Exception as e:
print_exception(e)
finally:
try:
tn.close()
except Exception as e:
pass
return success
def main():
cmd_parser = argparse.ArgumentParser(
description="Update the WiPy firmware with the specified image file"
)
cmd_parser.add_argument("-f", "--file", default=None, help="the path of the firmware file")
cmd_parser.add_argument("-u", "--user", default="micro", help="the username")
cmd_parser.add_argument("-p", "--password", default="python", help="the login password")
cmd_parser.add_argument("--ip", default="192.168.1.1", help="the ip address of the WiPy")
cmd_parser.add_argument(
"--verify", action="store_true", help="verify that the update succeeded"
)
cmd_parser.add_argument("-t", "--tag", default=None, help="git tag of the firmware image")
args = cmd_parser.parse_args()
result = 1
try:
if args.file is None:
raise ValueError("the image file path must be specified")
if transfer_file(args):
if reset_board(args):
if args.verify:
print("Waiting for the WiFi connection to come up again...")
# this time is to allow the system's wireless network card to
# connect to the WiPy again.
time.sleep(5)
if verify_update(args):
result = 0
else:
result = 0
except Exception as e:
print_exception(e)
finally:
sys.exit(result)
if __name__ == "__main__":
main()