summaryrefslogtreecommitdiff
path: root/util/uf2conv.py
blob: 8677a828c9fdc2eed647223f689770e74469d43e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
#!/usr/bin/env python3
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,
    'SAML21': 0x1851780a,
    'SAMD51': 0x55114460,
    'NRF52': 0x1b57745f,
    'STM32F0': 0x647824b6,
    'STM32F1': 0x5ee21072,
    'STM32F2': 0x5d1a0a2e,
    'STM32F3': 0x6b846188,
    'STM32F4': 0x57755a57,
    'STM32F7': 0x53b80f00,
    'STM32G0': 0x300f5633,
    'STM32G4': 0x4c71240a,
    'STM32H7': 0x6db66082,
    'STM32L0': 0x202e3a91,
    'STM32L1': 0x1e1f432d,
    'STM32L4': 0x00ff6919,
    'STM32L5': 0x04240bdf,
    'STM32WB': 0x70d16653,
    'STM32WL': 0x21460ff0,
    'ATMEGA32': 0x16573617,
    'MIMXRT10XX': 0x4FB2D5BD,
    'LPC55': 0x2abc77ec,
    'GD32F350': 0x31D228C6,
    'ESP32S2': 0xbfdd4eee,
    'RP2040': 0xe48bff56
}

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 = []
    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 is 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.append(block[32 : 32 + datalen])
        curraddr = newaddr + datalen
    return b"".join(outp)

def convert_to_carray(file_content):
    outp = "const unsigned long bindata_len = %d;\n" % len(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, " % file_content[i]
    outp += "\n};\n"
    return bytes(outp, "utf-8")

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 = []
    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.append(block)
    return b"".join(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 is 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 to_str(b):
    return b.decode("utf-8")

def get_drives():
    drives = []
    if sys.platform == "win32":
        r = subprocess.check_output(["wmic", "PATH", "Win32_LogicalDisk",
                                     "get", "DeviceID,", "VolumeName,",
                                     "FileSystem,", "DriveType"])
        for line in to_str(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 Exception:
            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('-D' , '--deploy', action='store_true',
                        help='just flash, do not 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 args.deploy:
            outbuf = inpbuf
        elif 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 or ext != "uf2":
            drives = []
            if args.output is 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()