feat(demo): add uf2 demo
This commit is contained in:
sakumisu
361
tools/uf2/uf2conv.py
Normal file
361
tools/uf2/uf2conv.py
Normal file
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#!/usr/bin/env python3
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import sys
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import struct
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import subprocess
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import re
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import os
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import os.path
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import argparse
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import json
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from time import sleep
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UF2_MAGIC_START0 = 0x0A324655 # "UF2\n"
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UF2_MAGIC_START1 = 0x9E5D5157 # Randomly selected
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UF2_MAGIC_END = 0x0AB16F30 # Ditto
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INFO_FILE = "/INFO_UF2.TXT"
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appstartaddr = 0x2000
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familyid = 0x0
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def is_uf2(buf):
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w = struct.unpack("<II", buf[0:8])
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return w[0] == UF2_MAGIC_START0 and w[1] == UF2_MAGIC_START1
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def is_hex(buf):
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try:
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w = buf[0:30].decode("utf-8")
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except UnicodeDecodeError:
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return False
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if w[0] == ':' and re.match(rb"^[:0-9a-fA-F\r\n]+$", buf):
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return True
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return False
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def convert_from_uf2(buf):
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global appstartaddr
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global familyid
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numblocks = len(buf) // 512
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curraddr = None
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currfamilyid = None
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families_found = {}
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prev_flag = None
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all_flags_same = True
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outp = []
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for blockno in range(numblocks):
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ptr = blockno * 512
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block = buf[ptr:ptr + 512]
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hd = struct.unpack(b"<IIIIIIII", block[0:32])
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if hd[0] != UF2_MAGIC_START0 or hd[1] != UF2_MAGIC_START1:
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print("Skipping block at " + ptr + "; bad magic")
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continue
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if hd[2] & 1:
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# NO-flash flag set; skip block
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continue
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datalen = hd[4]
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if datalen > 476:
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assert False, "Invalid UF2 data size at " + ptr
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newaddr = hd[3]
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if (hd[2] & 0x2000) and (currfamilyid == None):
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currfamilyid = hd[7]
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if curraddr == None or ((hd[2] & 0x2000) and hd[7] != currfamilyid):
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currfamilyid = hd[7]
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curraddr = newaddr
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if familyid == 0x0 or familyid == hd[7]:
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appstartaddr = newaddr
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padding = newaddr - curraddr
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if padding < 0:
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assert False, "Block out of order at " + ptr
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if padding > 10*1024*1024:
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assert False, "More than 10M of padding needed at " + ptr
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if padding % 4 != 0:
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assert False, "Non-word padding size at " + ptr
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while padding > 0:
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padding -= 4
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outp.append(b"\x00\x00\x00\x00")
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if familyid == 0x0 or ((hd[2] & 0x2000) and familyid == hd[7]):
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outp.append(block[32 : 32 + datalen])
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curraddr = newaddr + datalen
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if hd[2] & 0x2000:
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if hd[7] in families_found.keys():
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if families_found[hd[7]] > newaddr:
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families_found[hd[7]] = newaddr
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else:
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families_found[hd[7]] = newaddr
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if prev_flag == None:
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prev_flag = hd[2]
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if prev_flag != hd[2]:
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all_flags_same = False
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if blockno == (numblocks - 1):
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print("--- UF2 File Header Info ---")
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families = load_families()
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for family_hex in families_found.keys():
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family_short_name = ""
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for name, value in families.items():
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if value == family_hex:
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family_short_name = name
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print("Family ID is {:s}, hex value is 0x{:08x}".format(family_short_name,family_hex))
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print("Target Address is 0x{:08x}".format(families_found[family_hex]))
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if all_flags_same:
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print("All block flag values consistent, 0x{:04x}".format(hd[2]))
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else:
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print("Flags were not all the same")
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print("----------------------------")
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if len(families_found) > 1 and familyid == 0x0:
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outp = []
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appstartaddr = 0x0
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return b"".join(outp)
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def convert_to_carray(file_content):
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outp = "const unsigned long bindata_len = %d;\n" % len(file_content)
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outp += "const unsigned char bindata[] __attribute__((aligned(16))) = {"
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for i in range(len(file_content)):
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if i % 16 == 0:
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outp += "\n"
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outp += "0x%02x, " % file_content[i]
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outp += "\n};\n"
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return bytes(outp, "utf-8")
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def convert_to_uf2(file_content):
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global familyid
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datapadding = b""
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while len(datapadding) < 512 - 256 - 32 - 4:
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datapadding += b"\x00\x00\x00\x00"
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numblocks = (len(file_content) + 255) // 256
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outp = []
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for blockno in range(numblocks):
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ptr = 256 * blockno
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chunk = file_content[ptr:ptr + 256]
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flags = 0x0
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if familyid:
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flags |= 0x2000
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hd = struct.pack(b"<IIIIIIII",
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UF2_MAGIC_START0, UF2_MAGIC_START1,
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flags, ptr + appstartaddr, 256, blockno, numblocks, familyid)
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while len(chunk) < 256:
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chunk += b"\x00"
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block = hd + chunk + datapadding + struct.pack(b"<I", UF2_MAGIC_END)
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assert len(block) == 512
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outp.append(block)
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return b"".join(outp)
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class Block:
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def __init__(self, addr):
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self.addr = addr
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self.bytes = bytearray(256)
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def encode(self, blockno, numblocks):
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global familyid
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flags = 0x0
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if familyid:
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flags |= 0x2000
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hd = struct.pack("<IIIIIIII",
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UF2_MAGIC_START0, UF2_MAGIC_START1,
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flags, self.addr, 256, blockno, numblocks, familyid)
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hd += self.bytes[0:256]
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while len(hd) < 512 - 4:
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hd += b"\x00"
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hd += struct.pack("<I", UF2_MAGIC_END)
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return hd
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def convert_from_hex_to_uf2(buf):
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global appstartaddr
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appstartaddr = None
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upper = 0
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currblock = None
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blocks = []
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for line in buf.split('\n'):
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if line[0] != ":":
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continue
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i = 1
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rec = []
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while i < len(line) - 1:
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rec.append(int(line[i:i+2], 16))
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i += 2
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tp = rec[3]
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if tp == 4:
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upper = ((rec[4] << 8) | rec[5]) << 16
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elif tp == 2:
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upper = ((rec[4] << 8) | rec[5]) << 4
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elif tp == 1:
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break
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elif tp == 0:
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addr = upper + ((rec[1] << 8) | rec[2])
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if appstartaddr == None:
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appstartaddr = addr
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i = 4
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while i < len(rec) - 1:
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if not currblock or currblock.addr & ~0xff != addr & ~0xff:
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currblock = Block(addr & ~0xff)
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blocks.append(currblock)
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currblock.bytes[addr & 0xff] = rec[i]
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addr += 1
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i += 1
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numblocks = len(blocks)
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resfile = b""
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for i in range(0, numblocks):
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resfile += blocks[i].encode(i, numblocks)
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return resfile
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def to_str(b):
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return b.decode("utf-8")
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def get_drives():
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drives = []
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if sys.platform == "win32":
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r = subprocess.check_output(["wmic", "PATH", "Win32_LogicalDisk",
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"get", "DeviceID,", "VolumeName,",
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"FileSystem,", "DriveType"])
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for line in to_str(r).split('\n'):
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words = re.split(r'\s+', line)
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if len(words) >= 3 and words[1] == "2" and words[2] == "FAT":
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drives.append(words[0])
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else:
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searchpaths = ["/media"]
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if sys.platform == "darwin":
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searchpaths = ["/Volumes"]
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elif sys.platform == "linux":
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searchpaths += ["/media/" + os.environ["USER"], '/run/media/' + os.environ["USER"]]
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for rootpath in searchpaths:
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if os.path.isdir(rootpath):
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for d in os.listdir(rootpath):
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if os.path.isdir(rootpath):
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drives.append(os.path.join(rootpath, d))
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def has_info(d):
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try:
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return os.path.isfile(d + INFO_FILE)
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except:
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return False
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return list(filter(has_info, drives))
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def board_id(path):
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with open(path + INFO_FILE, mode='r') as file:
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file_content = file.read()
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return re.search(r"Board-ID: ([^\r\n]*)", file_content).group(1)
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def list_drives():
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for d in get_drives():
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print(d, board_id(d))
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def write_file(name, buf):
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with open(name, "wb") as f:
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f.write(buf)
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print("Wrote %d bytes to %s" % (len(buf), name))
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def load_families():
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# The expectation is that the `uf2families.json` file is in the same
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# directory as this script. Make a path that works using `__file__`
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# which contains the full path to this script.
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filename = "uf2families.json"
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pathname = os.path.join(os.path.dirname(os.path.abspath(__file__)), filename)
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with open(pathname) as f:
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raw_families = json.load(f)
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families = {}
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for family in raw_families:
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families[family["short_name"]] = int(family["id"], 0)
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return families
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def main():
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global appstartaddr, familyid
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def error(msg):
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print(msg, file=sys.stderr)
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sys.exit(1)
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parser = argparse.ArgumentParser(description='Convert to UF2 or flash directly.')
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parser.add_argument('input', metavar='INPUT', type=str, nargs='?',
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help='input file (HEX, BIN or UF2)')
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parser.add_argument('-b', '--base', dest='base', type=str,
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default="0x2000",
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help='set base address of application for BIN format (default: 0x2000)')
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parser.add_argument('-f', '--family', dest='family', type=str,
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default="0x0",
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help='specify familyID - number or name (default: 0x0)')
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parser.add_argument('-o', '--output', metavar="FILE", dest='output', type=str,
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help='write output to named file; defaults to "flash.uf2" or "flash.bin" where sensible')
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parser.add_argument('-d', '--device', dest="device_path",
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help='select a device path to flash')
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parser.add_argument('-l', '--list', action='store_true',
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help='list connected devices')
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parser.add_argument('-c', '--convert', action='store_true',
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help='do not flash, just convert')
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parser.add_argument('-D', '--deploy', action='store_true',
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help='just flash, do not convert')
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parser.add_argument('-w', '--wait', action='store_true',
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help='wait for device to flash')
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parser.add_argument('-C', '--carray', action='store_true',
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help='convert binary file to a C array, not UF2')
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parser.add_argument('-i', '--info', action='store_true',
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help='display header information from UF2, do not convert')
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args = parser.parse_args()
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appstartaddr = int(args.base, 0)
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families = load_families()
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if args.family.upper() in families:
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familyid = families[args.family.upper()]
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else:
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try:
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familyid = int(args.family, 0)
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except ValueError:
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error("Family ID needs to be a number or one of: " + ", ".join(families.keys()))
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if args.list:
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list_drives()
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else:
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if not args.input:
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error("Need input file")
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with open(args.input, mode='rb') as f:
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inpbuf = f.read()
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from_uf2 = is_uf2(inpbuf)
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ext = "uf2"
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if args.deploy:
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outbuf = inpbuf
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elif from_uf2 and not args.info:
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outbuf = convert_from_uf2(inpbuf)
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ext = "bin"
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elif from_uf2 and args.info:
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outbuf = ""
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convert_from_uf2(inpbuf)
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elif is_hex(inpbuf):
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outbuf = convert_from_hex_to_uf2(inpbuf.decode("utf-8"))
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elif args.carray:
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outbuf = convert_to_carray(inpbuf)
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ext = "h"
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else:
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outbuf = convert_to_uf2(inpbuf)
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if not args.deploy and not args.info:
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print("Converted to %s, output size: %d, start address: 0x%x" %
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(ext, len(outbuf), appstartaddr))
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if args.convert or ext != "uf2":
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if args.output == None:
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args.output = "flash." + ext
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if args.output:
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write_file(args.output, outbuf)
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if ext == "uf2" and not args.convert and not args.info:
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drives = get_drives()
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if len(drives) == 0:
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if args.wait:
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print("Waiting for drive to deploy...")
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while len(drives) == 0:
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sleep(0.1)
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drives = get_drives()
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elif not args.output:
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error("No drive to deploy.")
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for d in drives:
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print("Flashing %s (%s)" % (d, board_id(d)))
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write_file(d + "/NEW.UF2", outbuf)
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if __name__ == "__main__":
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main()
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Reference in New Issue
Block a user