micropython/tools/uf2conv.py

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#!/usr/bin/env python3
# Microsoft UF2
#
# The MIT License (MIT)
#
# Copyright (c) Microsoft Corporation
#
# All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import sys
import struct
import subprocess
import re
import os
import os.path
import argparse
UF2_MAGIC_START0 = 0x0A324655 # "UF2\n"
UF2_MAGIC_START1 = 0x9E5D5157 # Randomly selected
UF2_MAGIC_END = 0x0AB16F30 # Ditto
families = {
"SAMD21": 0x68ED2B88,
"SAMD51": 0x55114460,
"NRF52": 0x1B57745F,
"STM32F1": 0x5EE21072,
"STM32F4": 0x57755A57,
"ATMEGA32": 0x16573617,
}
INFO_FILE = "/INFO_UF2.TXT"
appstartaddr = 0x2000
familyid = 0x0
def is_uf2(buf):
w = struct.unpack("<II", buf[0:8])
return w[0] == UF2_MAGIC_START0 and w[1] == UF2_MAGIC_START1
def is_hex(buf):
try:
w = buf[0:30].decode("utf-8")
except UnicodeDecodeError:
return False
if w[0] == ":" and re.match(b"^[:0-9a-fA-F\r\n]+$", buf):
return True
return False
def convert_from_uf2(buf):
global appstartaddr
numblocks = len(buf) // 512
curraddr = None
outp = b""
for blockno in range(numblocks):
ptr = blockno * 512
block = buf[ptr : ptr + 512]
hd = struct.unpack(b"<IIIIIIII", block[0:32])
if hd[0] != UF2_MAGIC_START0 or hd[1] != UF2_MAGIC_START1:
print("Skipping block at " + ptr + "; bad magic")
continue
if hd[2] & 1:
# NO-flash flag set; skip block
continue
datalen = hd[4]
if datalen > 476:
assert False, "Invalid UF2 data size at " + ptr
newaddr = hd[3]
if curraddr == None:
appstartaddr = newaddr
curraddr = newaddr
padding = newaddr - curraddr
if padding < 0:
assert False, "Block out of order at " + ptr
if padding > 10 * 1024 * 1024:
assert False, "More than 10M of padding needed at " + ptr
if padding % 4 != 0:
assert False, "Non-word padding size at " + ptr
while padding > 0:
padding -= 4
outp += b"\x00\x00\x00\x00"
outp += block[32 : 32 + datalen]
curraddr = newaddr + datalen
return outp
def convert_to_carray(file_content):
outp = "const unsigned char bindata[] __attribute__((aligned(16))) = {"
for i in range(len(file_content)):
if i % 16 == 0:
outp += "\n"
outp += "0x%02x, " % ord(file_content[i])
outp += "\n};\n"
return outp
def convert_to_uf2(file_content):
global familyid
datapadding = b""
while len(datapadding) < 512 - 256 - 32 - 4:
datapadding += b"\x00\x00\x00\x00"
numblocks = (len(file_content) + 255) // 256
outp = b""
for blockno in range(numblocks):
ptr = 256 * blockno
chunk = file_content[ptr : ptr + 256]
flags = 0x0
if familyid:
flags |= 0x2000
hd = struct.pack(
b"<IIIIIIII",
UF2_MAGIC_START0,
UF2_MAGIC_START1,
flags,
ptr + appstartaddr,
256,
blockno,
numblocks,
familyid,
)
while len(chunk) < 256:
chunk += b"\x00"
block = hd + chunk + datapadding + struct.pack(b"<I", UF2_MAGIC_END)
assert len(block) == 512
outp += block
return outp
class Block:
def __init__(self, addr):
self.addr = addr
self.bytes = bytearray(256)
def encode(self, blockno, numblocks):
global familyid
flags = 0x0
if familyid:
flags |= 0x2000
hd = struct.pack(
"<IIIIIIII",
UF2_MAGIC_START0,
UF2_MAGIC_START1,
flags,
self.addr,
256,
blockno,
numblocks,
familyid,
)
hd += self.bytes[0:256]
while len(hd) < 512 - 4:
hd += b"\x00"
hd += struct.pack("<I", UF2_MAGIC_END)
return hd
def convert_from_hex_to_uf2(buf):
global appstartaddr
appstartaddr = None
upper = 0
currblock = None
blocks = []
for line in buf.split("\n"):
if line[0] != ":":
continue
i = 1
rec = []
while i < len(line) - 1:
rec.append(int(line[i : i + 2], 16))
i += 2
tp = rec[3]
if tp == 4:
upper = ((rec[4] << 8) | rec[5]) << 16
elif tp == 2:
upper = ((rec[4] << 8) | rec[5]) << 4
assert (upper & 0xFFFF) == 0
elif tp == 1:
break
elif tp == 0:
addr = upper | (rec[1] << 8) | rec[2]
if appstartaddr == None:
appstartaddr = addr
i = 4
while i < len(rec) - 1:
if not currblock or currblock.addr & ~0xFF != addr & ~0xFF:
currblock = Block(addr & ~0xFF)
blocks.append(currblock)
currblock.bytes[addr & 0xFF] = rec[i]
addr += 1
i += 1
numblocks = len(blocks)
resfile = b""
for i in range(0, numblocks):
resfile += blocks[i].encode(i, numblocks)
return resfile
def get_drives():
drives = []
if sys.platform == "win32":
r = subprocess.check_output(
[
"wmic",
"PATH",
"Win32_LogicalDisk",
"get",
"DeviceID,",
"VolumeName,",
"FileSystem,",
"DriveType",
]
)
for line in r.split("\n"):
words = re.split("\s+", line)
if len(words) >= 3 and words[1] == "2" and words[2] == "FAT":
drives.append(words[0])
else:
rootpath = "/media"
if sys.platform == "darwin":
rootpath = "/Volumes"
elif sys.platform == "linux":
tmp = rootpath + "/" + os.environ["USER"]
if os.path.isdir(tmp):
rootpath = tmp
for d in os.listdir(rootpath):
drives.append(os.path.join(rootpath, d))
def has_info(d):
try:
return os.path.isfile(d + INFO_FILE)
except:
return False
return list(filter(has_info, drives))
def board_id(path):
with open(path + INFO_FILE, mode="r") as file:
file_content = file.read()
return re.search("Board-ID: ([^\r\n]*)", file_content).group(1)
def list_drives():
for d in get_drives():
print(d, board_id(d))
def write_file(name, buf):
with open(name, "wb") as f:
f.write(buf)
print("Wrote %d bytes to %s." % (len(buf), name))
def main():
global appstartaddr, familyid
def error(msg):
print(msg)
sys.exit(1)
parser = argparse.ArgumentParser(description="Convert to UF2 or flash directly.")
parser.add_argument(
"input", metavar="INPUT", type=str, nargs="?", help="input file (HEX, BIN or UF2)"
)
parser.add_argument(
"-b",
"--base",
dest="base",
type=str,
default="0x2000",
help="set base address of application for BIN format (default: 0x2000)",
)
parser.add_argument(
"-o",
"--output",
metavar="FILE",
dest="output",
type=str,
help='write output to named file; defaults to "flash.uf2" or "flash.bin" where sensible',
)
parser.add_argument("-d", "--device", dest="device_path", help="select a device path to flash")
parser.add_argument("-l", "--list", action="store_true", help="list connected devices")
parser.add_argument("-c", "--convert", action="store_true", help="do not flash, just convert")
parser.add_argument(
"-f",
"--family",
dest="family",
type=str,
default="0x0",
help="specify familyID - number or name (default: 0x0)",
)
parser.add_argument(
"-C", "--carray", action="store_true", help="convert binary file to a C array, not UF2"
)
args = parser.parse_args()
appstartaddr = int(args.base, 0)
if args.family.upper() in families:
familyid = families[args.family.upper()]
else:
try:
familyid = int(args.family, 0)
except ValueError:
error("Family ID needs to be a number or one of: " + ", ".join(families.keys()))
if args.list:
list_drives()
else:
if not args.input:
error("Need input file")
with open(args.input, mode="rb") as f:
inpbuf = f.read()
from_uf2 = is_uf2(inpbuf)
ext = "uf2"
if from_uf2:
outbuf = convert_from_uf2(inpbuf)
ext = "bin"
elif is_hex(inpbuf):
outbuf = convert_from_hex_to_uf2(inpbuf.decode("utf-8"))
elif args.carray:
outbuf = convert_to_carray(inpbuf)
ext = "h"
else:
outbuf = convert_to_uf2(inpbuf)
print(
"Converting to %s, output size: %d, start address: 0x%x"
% (ext, len(outbuf), appstartaddr)
)
if args.convert:
drives = []
if args.output == None:
args.output = "flash." + ext
else:
drives = get_drives()
if args.output:
write_file(args.output, outbuf)
else:
if len(drives) == 0:
error("No drive to deploy.")
for d in drives:
print("Flashing %s (%s)" % (d, board_id(d)))
write_file(d + "/NEW.UF2", outbuf)
if __name__ == "__main__":
main()